feat(radar,cw): transponder CW panel switches to the Morse Expert engine

Background: the transponder panel CW decoder (added by the upstream
fork author) used a lightweight Kotlin Bayesian engine (core/domain/cw,
kept untouched as a fallback). This change makes the panel use the
Morse Expert engine ported in 4.5.0, so both CW entry points share the
same decoder with a live waterfall.

Changes:
- New mini layout cw_panel_main.xml (waterfall 80dp + decoded text,
  status line hidden but ID kept for controller lookup)
- MainActivity.onCreate overload with applyImmersive flag; panel binds
  with false so the host window system bars are not touched
- CwDecoderPanel now embeds the mini layout via AndroidView and drives
  the MainActivity controller: start/stop/reset map to the engine,
  lifecycle follows panel expand (start) / collapse (release mic)
- radar module now depends on feature:cw (+ constraintlayout 2.2.1,
  same as cw) for layout + controller reuse
- What's new rewritten in EN/TR/ZH for this release only

Verified: :feature:radar:compileDebugKotlin and :app:compileDebugKotlin
BUILD SUCCESSFUL locally; check_strings.py OK (7 files, no bare
apostrophes).

.github/workflows/release.yml

@@ -4,10 +4,15 @@ on:
   push:
     tags:
       - v**
+  workflow_dispatch:
+    inputs:
+      tag_name:
+        description: 'Release tag name (e.g. v4.4.3)'
+        required: false
+        default: ''
 
 env:
-  TAG_NAME: ${{ github.ref_name }}
-  GITHUB_TOKEN: ${{ secrets.RELEASE_TOKEN }}
+  TAG_NAME: ${{ github.event.inputs.tag_name || github.ref_name }}
 
 jobs:
   release:
@@ -16,66 +21,40 @@ jobs:
       contents: write
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v7
+        uses: actions/checkout@v4
 
       - name: Setup Java
-        uses: actions/setup-java@v5
+        uses: actions/setup-java@v4
         with:
           distribution: 'temurin'
           java-version: '21'
 
       - name: Setup Gradle
-        uses: gradle/actions/setup-gradle@v6
+        uses: gradle/actions/setup-gradle@v4
 
-      - name: Assemble Artifacts
-        run: ./gradlew assembleRelease bundleRelease
+      - name: Assemble APK
+        run: ./gradlew assembleRelease
 
       - name: Sign APK
         run: |
           echo "${{ secrets.KEY_STORE }}" | base64 -d > keystore.jks
           APK=$(find app/build/outputs/apk/release -name "*.apk" | head -1)
+          VERSION=${TAG_NAME#v}
+          SIGNED_APK="app/build/outputs/apk/release/Look4Sat-Pro-${VERSION}.apk"
           BUILD_TOOLS=$(ls -d ${ANDROID_HOME}/build-tools/*/ | sort -V | tail -1)
           ${BUILD_TOOLS}apksigner sign \
             --ks keystore.jks \
             --ks-pass pass:${{ secrets.KEY_STORE_PASSWORD }} \
             --ks-key-alias ${{ secrets.KEY_ALIAS }} \
             --key-pass pass:${{ secrets.KEY_PASSWORD }} \
-            --out app/build/outputs/apk/release/look4sat.apk \
+            --out "$SIGNED_APK" \
             "$APK"
           rm keystore.jks
-
-      - name: Sign Bundle
-        run: |
-          echo "${{ secrets.KEY_STORE }}" | base64 -d > keystore.jks
-          AAB=$(find app/build/outputs/bundle/release -name "*.aab" | head -1)
-          jarsigner -verbose -sigalg SHA256withRSA -digestalg SHA-256 \
-            -keystore keystore.jks \
-            -storepass ${{ secrets.KEY_STORE_PASSWORD }} \
-            -keypass ${{ secrets.KEY_PASSWORD }} \
-            "$AAB" ${{ secrets.KEY_ALIAS }}
-          rm keystore.jks
-
-      - name: Setup Ruby
-        uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: '3.4'
-
-      - name: Deploy Bundle to Google Play
-        run: |
-          gem install multi_json
-          gem install fastlane --no-document
-          AAB=$(find app/build/outputs/bundle/release -name "*.aab" | head -1)
-          echo '${{ secrets.SERVICE_ACCOUNT_JSON }}' > service_account.json
-          fastlane supply \
-            --aab "$AAB" \
-            --json_key service_account.json \
-            --package_name com.rtbishop.look4sat \
-            --track production \
-            --skip_upload_images true \
-            --skip_upload_screenshots true \
-          rm service_account.json
+          echo "SIGNED_APK=$SIGNED_APK" >> "$GITHUB_ENV"
 
       - name: Create Release
+        env:
+          GH_TOKEN: ${{ github.token }}
         run: |
           gh release create $TAG_NAME --title=$TAG_NAME --generate-notes
-          gh release upload $TAG_NAME app/build/outputs/apk/release/look4sat.apk
+          gh release upload $TAG_NAME "$SIGNED_APK"

.gitignore

@@ -18,7 +18,6 @@ out/
 # Gradle files
 .gradle/
 build/
-.cxx/
 
 # Local configuration file (sdk path, etc)
 local.properties
@@ -40,8 +39,7 @@ captures/
 .idea/
 
 # Keystore files
-# Uncomment the following line if you do not want to check your keystore files in.
-#*.jks
+*.jks
 /*.properties
 /keystore.properties
 /app/keystore.jks

README.md

@@ -1,26 +1,45 @@
-# Look4Sat-BA7OPF
+# Look4Sat: Satellite tracker
 
-[![Look4Sat CI](https://github.com/atsunatsu/Look4Sat/actions/workflows/release.yml/badge.svg)](https://github.com/atsunatsu/Look4Sat/actions/workflows/release.yml)
+[![Look4Sat CI](https://github.com/rt-bishop/Look4Sat/actions/workflows/release.yml/badge.svg)](https://github.com/rt-bishop/Look4Sat/actions/workflows/release.yml)
 
-**BA7OPF 定制版** — 基于 [rt-bishop/Look4Sat](https://github.com/rt-bishop/Look4Sat) 的业余无线电卫星追踪器，增加了线性卫星频率计算器等功能。
+[<img src="https://play.google.com/intl/en_gb/badges/static/images/badges/en_badge_web_generic.png" alt="Get it on Google Play" height="80">](https://play.google.com/store/apps/details?id=com.rtbishop.look4sat)
+[<img src="https://fdroid.gitlab.io/artwork/badge/get-it-on.png" alt="Get it on F-Droid" height="80">](https://f-droid.org/packages/com.rtbishop.look4sat/)
 
-## 本仓库特色功能
+### Radio satellite tracker and pass predictor for Android, inspired by Gpredict
 
-- **线性卫星转发器频率计算器** — 在雷达页的 Calculator 标签页中，支持 TX/RX 双向多普勒频率计算，以及下行频率偏移（offset）输入，方便操作带偏移的线性卫星
-- **CW 解码器** — 集成 Morse Expert 解码引擎，支持瀑布图、实时解码文本
-- **Passband 模式** — 支持通过位置滑块（Passband）自动计算 TX/RX 频率，避免切换时跳变
-- **中文界面优化** — 翻译修正、UI 布局调整
+<p float="left">
+<img src="fastlane/metadata/android/en-US/images/phoneScreenshots/1.png" width="192"/>
+<img src="fastlane/metadata/android/en-US/images/phoneScreenshots/2.png" width="192"/>
+<img src="fastlane/metadata/android/en-US/images/phoneScreenshots/3.png" width="192"/>
+<img src="fastlane/metadata/android/en-US/images/phoneScreenshots/4.png" width="192">
+</p>
 
-## 上游仓库
+### Track satellite passes with ease!
 
-本仓库是 [rt-bishop/Look4Sat](https://github.com/rt-bishop/Look4Sat) 的分支，上游仓库的原始功能包括：
+Thanks to [Celestrak](https://celestrak.com/) and [SatNOGS](https://satnogs.org/) you have access to over 9000 active satellites.\
+You can search the entire database by NORAD Catalog Number or the satellite's name.
 
-- 基于 Celestrak / SatNOGS 数据的 9000+ 活跃卫星追踪
-- SGP4/SDP4 轨道预测，10 天过境预报
-- 极坐标雷达图、地面轨迹图
-- SSTV 图像解码
-- 无广告、无跟踪、完全离线
+Orbital positions and passes are calculated relative to your location.\
+To get reliable data make sure to set the station position via the app Settings.
 
-## 许可证
+The application is built using Kotlin, Coroutines, Jetpack Compose and Navigation.\
+It is now and always will be completely ad-free and open-source.
 
-GNU General Public License v3.0。详见 [LICENSE](LICENSE)。
+## Main features:
+
+*  Predicting satellite positions and passes for up to 10 days
+*  Showing the list of currently active and upcoming satellite passes
+*  Showing the active pass progress, polar trajectory and transceivers info
+*  Showing the satellite positional data, footprint and ground track on the map
+*  Custom TLE satellite data import is available via Three Line Element .txt files
+*  Offline first: calculations are made offline. Weekly TLE data update is recommended.
+
+## Star History
+
+<a href="https://www.star-history.com/?repos=rt-bishop%2FLook4Sat&type=timeline&legend=top-left">
+ <picture>
+   <source media="(prefers-color-scheme: dark)" srcset="https://api.star-history.com/chart?repos=rt-bishop/Look4Sat&type=timeline&theme=dark&legend=top-left" />
+   <source media="(prefers-color-scheme: light)" srcset="https://api.star-history.com/chart?repos=rt-bishop/Look4Sat&type=timeline&legend=top-left" />
+   <img alt="Star History Chart" src="https://api.star-history.com/chart?repos=rt-bishop/Look4Sat&type=timeline&legend=top-left" />
+ </picture>
+</a>

app/build.gradle.kts

@@ -1,24 +1,36 @@
+import java.util.Properties
+
 plugins {
     alias(libs.plugins.convention.applicationPlugin)
 }
 
+// Load signing config from keystore.properties (gitignored, never commit credentials)
+val keystoreProperties = Properties().apply {
+    val propsFile = rootProject.file("keystore.properties")
+    if (propsFile.exists()) propsFile.inputStream().use { load(it) }
+}
+
 android {
-    namespace = libs.versions.packageName.get()
+    // CW 解码 native 库仅 armeabi-v7a(照搬 Morse Expert 1.15): 全 ABI 打包会在
+    // arm64 设备 loadLibrary 失败, 强制 32 位兼容(用户设备为 32 位软件)
     defaultConfig {
-        applicationId = "cn.ba7opf.look4sat"
-        ndk { abiFilters.add("armeabi-v7a") }
+        ndk {
+            abiFilters += listOf("armeabi-v7a")
+        }
     }
     signingConfigs {
-        create("release") {
-            storeFile = file(System.getProperty("user.home") + "/my-release-key.jks")
-            storePassword = "look4sat123"
-            keyAlias = "look4sat"
-            keyPassword = "look4sat123"
+        if (keystoreProperties["storeFile"] != null) {
+            create("release") {
+                storeFile = rootProject.file(keystoreProperties["storeFile"] as String)
+                storePassword = keystoreProperties["storePassword"] as String
+                keyAlias = keystoreProperties["keyAlias"] as String
+                keyPassword = keystoreProperties["keyPassword"] as String
+            }
         }
     }
     buildTypes {
         release {
-            signingConfig = signingConfigs.getByName("release")
+            signingConfig = signingConfigs.findByName("release")
         }
     }
-}
+}

app/src/main/AndroidManifest.xml

@@ -43,7 +43,7 @@
 
         <meta-data
             android:name="android.telephony.PROPERTY_SATELLITE_DATA_OPTIMIZED"
-            android:value="com.rtbishop.look4sat" />
+            android:value="com.rtbishop.look4sat.bg7nta" />
 
     </application>
 </manifest>

app/src/main/java/com/rtbishop/look4sat/MainScreen.kt

@@ -80,11 +80,13 @@ import com.rtbishop.look4sat.core.presentation.RadarDestination
 import com.rtbishop.look4sat.core.presentation.Screen
 import com.rtbishop.look4sat.core.presentation.hasEnoughHeight
 import com.rtbishop.look4sat.core.presentation.hasEnoughWidth
+import com.rtbishop.look4sat.feature.cw.CwDecodeScreen
 import com.rtbishop.look4sat.feature.map.MapDestination
 import com.rtbishop.look4sat.feature.mutual.MutualScreen
 import com.rtbishop.look4sat.feature.mutual.MutualViewModel
 import com.rtbishop.look4sat.feature.passes.PassesDestination
 import com.rtbishop.look4sat.feature.radar.RadarDestination
+import com.rtbishop.look4sat.feature.roaming.RoamingScreen
 import com.rtbishop.look4sat.feature.satellites.SatellitesDestination
 import com.rtbishop.look4sat.feature.settings.SettingsDestination
 
@@ -130,12 +132,21 @@ fun MainScreen(navigateToRadar: () -> Unit = {}) {
     val currentKey = backStack.lastOrNull()
     val navigateBack: () -> Unit = { backStack.removeLastOrNull() }
     val fadeTransition = fadeIn(animationSpec = tween(350)) togetherWith fadeOut(animationSpec = tween(350))
-    val navItems = listOf(Screen.Satellites, Screen.Passes, Screen.Radar, Screen.Mutual, Screen.Map, Screen.Settings)
-
     val context = LocalContext.current
     val container = (context.applicationContext as IContainerProvider).getMainContainer()
     val trackingState by container.radioTrackingService.state.collectAsStateWithLifecycle()
     val otherSettings by container.settingsRepo.otherSettings.collectAsStateWithLifecycle()
+    // UI 设置: 按 screenOrder 排序(空 = 默认顺序), 再按 hiddenScreens 过滤(设置页固定保留)
+    val navItems = listOf(Screen.Satellites, Screen.Passes, Screen.Radar, Screen.Mutual, Screen.Roaming, Screen.CwDecode, Screen.Map, Screen.Settings)
+        .sortedBy { screen ->
+            // 未知(新页面如 CwDecode 不在旧持久化顺序里): 用默认顺序位置(漫游↔地图), 再兜底最后
+            val idx = otherSettings.screenOrder.indexOf(screen.screenId)
+            if (idx != -1) idx
+            else com.rtbishop.look4sat.core.presentation.defaultScreenOrder.indexOf(screen.screenId).let {
+                if (it != -1) it else Int.MAX_VALUE
+            }
+        }
+        .filter { it.screenId !in otherSettings.hiddenScreens || it is Screen.Settings }
     // Activity-scoped so the mutual query results survive navigation to Radar and back
     val mutualViewModel: MutualViewModel = viewModel(
         viewModelStoreOwner = context as ViewModelStoreOwner,
@@ -156,6 +167,7 @@ fun MainScreen(navigateToRadar: () -> Unit = {}) {
                         is Screen.Passes -> screen is Screen.Passes
                         is Screen.Radar -> screen is Screen.Radar
                         is Screen.Mutual -> screen is Screen.Mutual
+                        is Screen.CwDecode -> screen is Screen.CwDecode
                         is Screen.Map -> screen is Screen.Map
                         is Screen.Settings -> screen is Screen.Settings
                         else -> false
@@ -224,6 +236,12 @@ fun MainScreen(navigateToRadar: () -> Unit = {}) {
                                 }
                             )
                         }
+                        entry<Screen.Roaming> {
+                            RoamingScreen()
+                        }
+                        entry<Screen.CwDecode> {
+                            CwDecodeScreen()
+                        }
                         entry<Screen.Settings> {
                             SettingsDestination()
                         }
@@ -280,4 +298,4 @@ fun MainScreen(navigateToRadar: () -> Unit = {}) {
             }
         }
     }
-}
+}

build-logic/convention/src/main/java/com/rtbishop/look4sat/convention/ApplicationPlugin.kt

@@ -31,10 +31,12 @@ internal class ApplicationPlugin : Plugin<Project> {
             implementation(project(":core:data"))
             implementation(project(":core:domain"))
             implementation(project(":core:presentation"))
+            implementation(project(":feature:cw"))
             implementation(project(":feature:map"))
             implementation(project(":feature:mutual"))
             implementation(project(":feature:passes"))
             implementation(project(":feature:radar"))
+            implementation(project(":feature:roaming"))
             implementation(project(":feature:satellites"))
             implementation(project(":feature:settings"))
             implementation(libs.androidx.core.splashscreen)

build-logic/convention/src/main/java/com/rtbishop/look4sat/convention/PluginSetupUtils.kt

@@ -57,7 +57,7 @@ internal fun Project.setupAndroidApp() {
         namespace = libs.versions.packageName.get()
         compileSdk = libs.versions.compileSdk.get().toInt()
         defaultConfig {
-            applicationId = libs.versions.packageName.get()
+            applicationId = libs.versions.applicationId.get()
             minSdk = libs.versions.minSdk.get().toInt()
             versionCode = libs.versions.appVersionCode.get().toInt()
             versionName = libs.versions.appVersionName.get()

core/data/src/main/java/com/rtbishop/look4sat/core/data/repository/DatabaseRepo.kt

@@ -69,11 +69,14 @@ class DatabaseRepo(
         val dataSourcesSettings = settingsRepo.dataSourcesSettings.value
         val tleUrls = buildMap {
             putAll(Sources.satelliteDataUrls)
-            if (dataSourcesSettings.useCustomTLE) put(customSourceType, dataSourcesSettings.tleUrl)
+            // 开关开且 URL 非空 -> All 用自定义 URL;否则用默认 URL(在线更新默认源)
+            put("All", if (dataSourcesSettings.useCustomTLE && dataSourcesSettings.tleUrl.isNotBlank())
+                dataSourcesSettings.tleUrl else Sources.defaultTleUrl)
         }.filterValues { it.isNotBlank() }
         val radioUrls = buildMap {
             putAll(Sources.transceiversDataUrls)
-            if (dataSourcesSettings.useCustomTransceivers) put(customSourceType, dataSourcesSettings.transceiversUrl)
+            put("SatNOGS", if (dataSourcesSettings.useCustomTransceivers && dataSourcesSettings.transceiversUrl.isNotBlank())
+                dataSourcesSettings.transceiversUrl else Sources.defaultTransceiversUrl)
         }.filterValues { it.isNotBlank() }
         // launch all network requests concurrently
         val tleJobs = tleUrls.values.map { url -> async { url to remoteSource.getNetworkStream(url) } }

core/data/src/main/java/com/rtbishop/look4sat/core/data/repository/SatelliteRepo.kt

@@ -95,14 +95,8 @@ class SatelliteRepo(
         }
     }
 
-    override suspend fun getRadios(
-        sat: OrbitalObject,
-        pos: GeoPos,
-        radios: List<SatRadio>,
-        time: Long
-    ): List<SatRadio> {
+    override suspend fun getRadios(satPos: OrbitalPos, radios: List<SatRadio>): List<SatRadio> {
         return withContext(dispatcher) {
-            val satPos = sat.getPosition(pos, time)
             radios.map { transmitter ->
                 transmitter.copy(
                     downlinkLow = transmitter.downlinkLow?.let { satPos.getDownlinkFreq(it) },
@@ -242,13 +236,16 @@ class SatelliteRepo(
             if (elevation > maxElevation) maxElevation = elevation
         } while (elevation < 0.0)
 
-        // refine AOS to ~500ms precision
-        calendarTimeMillis -= 60L * 1000L
-        do {
-            calendarTimeMillis += 500L
-            elevation = sat.getElevation(pos, calendarTimeMillis)
-            if (elevation > maxElevation) maxElevation = elevation
-        } while (elevation < 0.0)
+        // refine AOS to ~500ms precision via binary search.
+        // Elevation is monotonic across the horizon crossing, so binary search
+        // finds the crossing in ~8 SGP4 calls instead of up to 120 linear steps.
+        var aosLo = calendarTimeMillis - 60L * 1000L // elevation < 0 (below horizon)
+        var aosHi = calendarTimeMillis // elevation >= 0 (above horizon)
+        while (aosHi - aosLo > 500L) {
+            val mid = (aosLo + aosHi) / 2
+            if (sat.getElevation(pos, mid) < 0.0) aosLo = mid else aosHi = mid
+        }
+        calendarTimeMillis = aosHi
 
         // Get full position for AOS data (azimuth, altitude)
         val aosPos = sat.getFullPosition(pos, calendarTimeMillis)
@@ -262,13 +259,14 @@ class SatelliteRepo(
             if (elevation > maxElevation) maxElevation = elevation
         } while (elevation > 0.0)
 
-        // refine LOS to ~500ms precision
-        calendarTimeMillis -= 30L * 1000L
-        do {
-            calendarTimeMillis += 500L
-            elevation = sat.getElevation(pos, calendarTimeMillis)
-            if (elevation > maxElevation) maxElevation = elevation
-        } while (elevation > 0.0)
+        // refine LOS to ~500ms precision via binary search (same monotonic argument)
+        var losLo = calendarTimeMillis - 30L * 1000L // elevation > 0 (above horizon)
+        var losHi = calendarTimeMillis // elevation <= 0 (below horizon)
+        while (losHi - losLo > 500L) {
+            val mid = (losLo + losHi) / 2
+            if (sat.getElevation(pos, mid) > 0.0) losLo = mid else losHi = mid
+        }
+        calendarTimeMillis = losHi
 
         // Get full position for LOS data (azimuth, altitude)
         val losPos = sat.getFullPosition(pos, calendarTimeMillis)

core/data/src/main/java/com/rtbishop/look4sat/core/data/repository/SettingsRepo.kt

@@ -29,6 +29,7 @@ import com.rtbishop.look4sat.core.domain.model.OtherSettings
 import com.rtbishop.look4sat.core.domain.model.PassesSettings
 import com.rtbishop.look4sat.core.domain.model.RCSettings
 import com.rtbishop.look4sat.core.domain.model.RadioControlSettings
+import com.rtbishop.look4sat.core.domain.source.Sources
 import com.rtbishop.look4sat.core.domain.predict.GeoPos
 import com.rtbishop.look4sat.core.domain.repository.ISettingsRepo
 import com.rtbishop.look4sat.core.domain.utility.positionToQth
@@ -76,6 +77,8 @@ class SettingsRepo(
     private val keyStateOfUtc = "stateOfUtc"
     private val keyStateOfLightTheme = "stateOfLightTheme"
     private val keyStateOfNightMode = "stateOfNightMode"
+    private val keyHiddenScreens = "hiddenScreens"
+    private val keyScreenOrder = "screenOrder"
     private val keyStationAltitude = "stationAltitude"
     private val keyStationLatitude = "stationLatitude"
     private val keyStationLongitude = "stationLongitude"
@@ -213,8 +216,8 @@ class SettingsRepo(
     }
 
     private fun setStationPosition(latitude: Double, longitude: Double, altitude: Double, locator: String) {
-        val newLat = latitude.round(4)
-        val newLon = longitude.round(4)
+        val newLat = latitude.round(5)
+        val newLon = longitude.round(5)
         val newAlt = altitude.round(1)
         val timestamp = System.currentTimeMillis()
         println("Received new Position($newLat, $newLon, $newAlt) & Locator $locator")
@@ -356,6 +359,8 @@ class SettingsRepo(
                 putString(keySstvMode, new.sstvMode)
                 putLong(keyLowElevation, new.lowElevation.toRawBits())
                 putLong(keyHighElevation, new.highElevation.toRawBits())
+                putStringSet(keyHiddenScreens, new.hiddenScreens.toSet())
+                putString(keyScreenOrder, new.screenOrder.joinToString(","))
             }
             new
         }
@@ -371,6 +376,8 @@ class SettingsRepo(
         shouldSeeWarning = preferences.getBoolean(keyShouldSeeWarning, true),
         shouldSeeWhatsNew = preferences.getBoolean(keyShouldSeeWhatsNew, true),
         sstvMode = preferences.getString(keySstvMode, null) ?: "Auto",
+        hiddenScreens = preferences.getStringSet(keyHiddenScreens, emptySet())?.toList() ?: emptyList(),
+        screenOrder = preferences.getString(keyScreenOrder, null)?.split(",")?.filter { it.isNotBlank() } ?: emptyList(),
         lowElevation = Double.fromBits(preferences.getLong(keyLowElevation, 15.0.toRawBits())),
         highElevation = Double.fromBits(preferences.getLong(keyHighElevation, 45.0.toRawBits()))
     )
@@ -390,12 +397,20 @@ class SettingsRepo(
         _dataSourcesSettings.value = settings
     }
 
-    private fun getDataSourcesSettings(): DataSourcesSettings = DataSourcesSettings(
-        useCustomTLE = preferences.getBoolean(keyUseCustomTle, false),
-        useCustomTransceivers = preferences.getBoolean(keyUseCustomTransceivers, false),
-        tleUrl = preferences.getString(keyTleUrl, "https://example.com/tle.txt") ?: "",
-        transceiversUrl = preferences.getString(keyTransceiversUrl, "https://example.com/radio.json") ?: ""
-    )
+    private fun getDataSourcesSettings(): DataSourcesSettings {
+        // 4.4.8 修复: 旧版 example.com 占位 URL 视为未配置 -> 替换为真实默认 URL 且开关强制关闭,
+        // 否则在线更新的 All/SatNOGS 源会指向错误地址导致更新失败
+        val storedTleUrl = preferences.getString(keyTleUrl, Sources.defaultTleUrl) ?: Sources.defaultTleUrl
+        val storedTxUrl = preferences.getString(keyTransceiversUrl, Sources.defaultTransceiversUrl) ?: Sources.defaultTransceiversUrl
+        val tleUrl = if (storedTleUrl == "https://example.com/tle.txt") Sources.defaultTleUrl else storedTleUrl
+        val txUrl = if (storedTxUrl == "https://example.com/radio.json") Sources.defaultTransceiversUrl else storedTxUrl
+        return DataSourcesSettings(
+            useCustomTLE = preferences.getBoolean(keyUseCustomTle, false) && tleUrl != Sources.defaultTleUrl,
+            useCustomTransceivers = preferences.getBoolean(keyUseCustomTransceivers, false) && txUrl != Sources.defaultTransceiversUrl,
+            tleUrl = tleUrl,
+            transceiversUrl = txUrl
+        )
+    }
     //endregion
 
     //region # Radio control settings

core/data/src/test/java/com/rtbishop/look4sat/core/data/repository/DatabaseRepoTest.kt

@@ -102,7 +102,8 @@ class DatabaseRepoTest {
         repository.updateFromRemote()
 
         assertTrue(localSource.insertedEntries.any { it.catnum == 25544 })
-        assertEquals(listOf(25544), settingsRepo.satelliteTypeIdsByType["Other"])
+        // 新语义: 开关开 + URL 非空 -> All 源用自定义 URL, 数据归入 All 类型
+        assertEquals(listOf(25544), settingsRepo.satelliteTypeIdsByType["All"])
     }
 
     private fun validCsvStream(): InputStream = """

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/model/Settings.kt

@@ -62,7 +62,11 @@ data class OtherSettings(
     val shouldSeeWhatsNew: Boolean,
     val sstvMode: String = "Auto",
     val lowElevation: Double = 15.0,
-    val highElevation: Double = 45.0
+    val highElevation: Double = 45.0,
+    // UI 设置: 底部导航栏隐藏的页面(Screen simpleName 列表, 默认空 = 全部显示)
+    val hiddenScreens: List<String> = emptyList(),
+    // UI 设置: 页面顺序(空 = 默认顺序: 卫星/过境/雷达/匹配/漫游/地图/设置)
+    val screenOrder: List<String> = emptyList()
 )
 
 data class DataSourcesSettings(

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/repository/ISatelliteRepo.kt

@@ -61,7 +61,7 @@ interface ISatelliteRepo {
     suspend fun getTrack(sat: OrbitalObject, pos: GeoPos, start: Long, end: Long): List<OrbitalPos>
 
     /** Get Doppler-shifted radio frequencies for a satellite at the given time. */
-    suspend fun getRadios(sat: OrbitalObject, pos: GeoPos, radios: List<SatRadio>, time: Long): List<SatRadio>
+    suspend fun getRadios(satPos: OrbitalPos, radios: List<SatRadio>): List<SatRadio>
 
     /** Fetch radio transceivers for a satellite by its catalog number. */
     suspend fun getRadiosWithId(id: Int): List<SatRadio>

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/source/Sources.kt

@@ -18,6 +18,10 @@
 package com.rtbishop.look4sat.core.domain.source
 
 object Sources {
+    // 在线更新的默认 URL(用户可通过"自定义URL"对话框修改/重置)
+    val defaultTleUrl = "https://celestrak.org/NORAD/elements/gp.php?GROUP=active&FORMAT=csv"
+    val defaultTransceiversUrl = "https://db.satnogs.org/api/transmitters/?format=json&status=active"
+
     val satelliteDataUrls = mapOf(
         "All" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=active&FORMAT=csv",
         "Amateur" to "https://celestrak.org/NORAD/elements/gp.php?GROUP=amateur&FORMAT=csv",

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/utility/DopplerFrequencyCalculator.kt

@@ -1,4 +1,4 @@
-/*
+/* 
  * Look4Sat. Amateur radio satellite tracker and pass predictor.
  * Copyright (C) 2019-2026 Arty Bishop and contributors.
  *
@@ -11,33 +11,24 @@ package com.rtbishop.look4sat.core.domain.utility
 
 import com.rtbishop.look4sat.core.domain.model.SatRadio
 import com.rtbishop.look4sat.core.domain.predict.OrbitalPos
-import java.util.Locale
 
 /**
  * Computes Doppler-corrected reciprocal frequencies for linear transponders.
  *
- * The full physical path:
+ * For a linear (passband) transponder, uplink and downlink frequencies are
+ * related by a fixed passband offset. When the satellite moves, both are
+ * Doppler-shifted. Given one, we compute the other:
  *
- * TX→RX (uplink → downlink):
- *   ① 地面发射 f_tx
- *   ② 卫星收到 f_tx × (c - v) / c  （上行多普勒）
- *   ③ 卫星转发 = passband映射(②)    （在卫星上做映射）
- *   ④ 地面听到 ③ × (c - v) / c     （下行多普勒）
- *
- * RX→TX (downlink → uplink):
- *   ④ 地面听到 f_rx
- *   ③ 卫星转发 = f_rx × (c + v) / c  （逆下行多普勒）
- *   ② 卫星收到 = 逆passband映射(③)
- *   ① 地面应发射 = ② × (c + v) / c   （逆上行多普勒）
+ *   downlink → uplink: mapDownlinkToUplink (passband) → getUplinkFreq (Doppler)
+ *   uplink → downlink: mapUplinkToDownlink (passband) → getDownlinkFreq (Doppler)
  *
  * Addresses GitHub issue #91 (Custom frequency Doppler correction).
  */
 object DopplerFrequencyCalculator {
 
     /**
-     * Given a downlink frequency (what the user hears), compute the
-     * uplink frequency the user should transmit.
-     * Full path: ④→③→②→①
+     * Given a downlink frequency, compute the Doppler-corrected uplink frequency.
+     * Returns null if the transponder is not a linear passband type.
      */
     fun computeUplinkFromDownlink(
         downlinkHz: Long,
@@ -45,22 +36,14 @@ object DopplerFrequencyCalculator {
         orbitalPos: OrbitalPos
     ): Long? {
         if (!isLinearTransponder(transponder)) return null
-        // ④→③ 逆下行多普勒：卫星转发的频率
-        val satTx = orbitalPos.getUplinkFreq(downlinkHz)
-        // ③→② 逆 passband 映射
-        val satRx = TransponderMapper.mapDownlinkToUplink(satTx, transponder) ?: return null
-        // ②→① 逆上行多普勒：地面应发射的频率
-        return orbitalPos.getUplinkFreq(satRx)
+        val baseUplink = TransponderMapper.mapDownlinkToUplink(downlinkHz, transponder) ?: return null
+        return orbitalPos.getUplinkFreq(baseUplink)
     }
 
     /**
-     * Given a downlink frequency (what the user hears), compute the
-     * uplink frequency the user should transmit, with an offset applied
-     * to the downlink (in Hz).
-     * Full path: ④→③→②→①
-     *
-     * The user-entered downlink frequency already includes the offset, so subtract
-     * it before the inverse downlink Doppler.
+     * Given a downlink frequency, compute the Doppler-corrected uplink frequency
+     * with an offset applied to the downlink (in Hz).
+     * Returns null if the transponder is not a linear passband type.
      */
     fun computeUplinkFromDownlinkWithOffset(
         downlinkHz: Long,
@@ -69,20 +52,13 @@ object DopplerFrequencyCalculator {
         offsetHz: Long
     ): Long? {
         if (!isLinearTransponder(transponder)) return null
-        // ④→③ 逆下行多普勒：卫星转发的频率（含 offset）
-        val satTxWithOffset = orbitalPos.getUplinkFreq(downlinkHz)
-        // ③ 去掉 offset（offset 在卫星本地频率域）
-        val satTx = satTxWithOffset - offsetHz
-        // ③→② 逆 passband 映射
-        val satRx = TransponderMapper.mapDownlinkToUplink(satTx, transponder) ?: return null
-        // ②→① 逆上行多普勒：地面应发射的频率
-        return orbitalPos.getUplinkFreq(satRx)
+        val baseUplink = TransponderMapper.mapDownlinkToUplink(downlinkHz + offsetHz, transponder) ?: return null
+        return orbitalPos.getUplinkFreq(baseUplink)
     }
 
     /**
-     * Given an uplink frequency (what the user transmits), compute the
-     * downlink frequency the user will hear.
-     * Full path: ①→②→③→④
+     * Given an uplink frequency, compute the Doppler-corrected downlink frequency.
+     * Returns null if the transponder is not a linear passband type.
      */
     fun computeDownlinkFromUplink(
         uplinkHz: Long,
@@ -90,19 +66,14 @@ object DopplerFrequencyCalculator {
         orbitalPos: OrbitalPos
     ): Long? {
         if (!isLinearTransponder(transponder)) return null
-        // ①→② 上行多普勒：卫星收到的频率
-        val satRx = orbitalPos.getDownlinkFreq(uplinkHz)
-        // ②→③ passband 映射
-        val satTx = TransponderMapper.mapUplinkToDownlink(satRx, transponder) ?: return null
-        // ③→④ 下行多普勒：地面听到的
-        return orbitalPos.getDownlinkFreq(satTx)
+        val baseDownlink = TransponderMapper.mapUplinkToDownlink(uplinkHz, transponder) ?: return null
+        return orbitalPos.getDownlinkFreq(baseDownlink)
     }
 
     /**
-     * Given an uplink frequency (what the user transmits), compute the
-     * downlink frequency the user will hear, with an offset applied
-     * to the downlink (in Hz).
-     * Full path: ①→②→③→④
+     * Given an uplink frequency, compute the Doppler-corrected downlink frequency
+     * with an offset applied to the downlink (in Hz).
+     * Returns null if the transponder is not a linear passband type.
      */
     fun computeDownlinkFromUplinkWithOffset(
         uplinkHz: Long,
@@ -111,13 +82,8 @@ object DopplerFrequencyCalculator {
         offsetHz: Long
     ): Long? {
         if (!isLinearTransponder(transponder)) return null
-        // ①→② 上行多普勒：卫星收到的频率
-        val satRx = orbitalPos.getDownlinkFreq(uplinkHz)
-        // ②→③ passband 映射
-        val satTx = TransponderMapper.mapUplinkToDownlink(satRx, transponder) ?: return null
-        // ③ 加上 offset（offset 在卫星本地频率域）
-        // ③→④ 下行多普勒：地面听到的
-        return orbitalPos.getDownlinkFreq(satTx + offsetHz)
+        val baseDownlink = TransponderMapper.mapUplinkToDownlink(uplinkHz, transponder) ?: return null
+        return orbitalPos.getDownlinkFreq(baseDownlink + offsetHz)
     }
 
     /** True if this transponder supports linear passband mapping. */
@@ -129,26 +95,4 @@ object DopplerFrequencyCalculator {
         return upLow != null && upHigh != null && downLow != null && downHigh != null
                 && upLow != upHigh && downLow != downHigh
     }
-
-    /**
-     * True for the radio entry that should drive the standalone Calculator page.
-     *
-     * A frequency range alone is not enough: some non-user-facing or drifting data entries
-     * can also have low/high frequencies. The calculator is meant for the named linear
-     * transponder entry, e.g. "Linear Transponder", "Linear Transp.", "SSB Transponder".
-     */
-    fun isNamedLinearTransponder(transponder: SatRadio): Boolean {
-        if (!isLinearTransponder(transponder)) return false
-
-        val info = transponder.info.lowercase(Locale.ENGLISH)
-        val modes = listOfNotNull(transponder.downlinkMode, transponder.uplinkMode)
-            .joinToString(separator = " ")
-            .lowercase(Locale.ENGLISH)
-        val hasLinearName = info.contains("linear")
-        val hasTransponderName = info.contains("transponder") || info.contains("transp") ||
-                info.contains("xponder") || info.contains("xpdr")
-        val hasLinearMode = listOf("ssb", "usb", "lsb", "cw").any { modes.contains(it) }
-
-        return (hasLinearName && hasTransponderName) || (hasTransponderName && hasLinearMode)
-    }
 }

core/domain/src/main/java/com/rtbishop/look4sat/core/domain/utility/QthConverter.kt

@@ -19,31 +19,78 @@ package com.rtbishop.look4sat.core.domain.utility
 
 import com.rtbishop.look4sat.core.domain.predict.GeoPos
 
+/**
+ * Converts a Maidenhead locator (QTH grid square) to a GeoPos.
+ * Supports 6-char (3 pair), 8-char (4 pair) and 10-char (5 pair) locators.
+ * The returned position is the center of the finest cell encoded by the locator:
+ *  - 6 char: 5' lon x 2.5' lat cell center
+ *  - 8 char: 30" lon x 15" lat cell center
+ *  - 10 char: 1.25" lon x 0.625" lat cell center
+ */
 fun qthToPosition(locator: String): GeoPos? {
-    val trimmedQth = locator.take(6)
+    val trimmedQth = locator.trim().uppercase()
     if (!isValidLocator(trimmedQth)) return null
-    val lonFirst = (trimmedQth[0].uppercaseChar().code - 65) * 20
-    val latFirst = (trimmedQth[1].uppercaseChar().code - 65) * 10
+    val lonFirst = (trimmedQth[0].code - 65) * 20
+    val latFirst = (trimmedQth[1].code - 65) * 10
     val lonSecond = trimmedQth[2].toString().toInt() * 2
     val latSecond = trimmedQth[3].toString().toInt()
-    val lonThird = (((trimmedQth[4].lowercaseChar().code - 97) / 12.0) + (1.0 / 24.0)) - 180
-    val latThird = (((trimmedQth[5].lowercaseChar().code - 97) / 24.0) + (1.0 / 48.0)) - 90
-    val longitude = (lonFirst + lonSecond + lonThird).round(4)
-    val latitude = (latFirst + latSecond + latThird).round(4)
-    return GeoPos(latitude, longitude)
+    val lonThird = (trimmedQth[4].lowercaseChar().code - 97) / 12.0
+    val latThird = (trimmedQth[5].lowercaseChar().code - 97) / 24.0
+    var longitude = lonFirst + lonSecond + lonThird - 180
+    var latitude = latFirst + latSecond + latThird - 90
+    // 8-char extension: 4th pair, digits, 30" lon x 15" lat cells
+    if (trimmedQth.length >= 8) {
+        longitude += trimmedQth[6].toString().toInt() / 120.0
+        latitude += trimmedQth[7].toString().toInt() / 240.0
+    }
+    // 10-char extension: 5th pair, letters, 1.25" lon x 0.625" lat cells
+    if (trimmedQth.length >= 10) {
+        longitude += (trimmedQth[8].lowercaseChar().code - 97) / 2880.0
+        latitude += (trimmedQth[9].lowercaseChar().code - 97) / 5760.0
+    }
+    // Offset to the center of the finest encoded cell
+    when (trimmedQth.length) {
+        8 -> {
+            longitude += 1.0 / 240.0
+            latitude += 1.0 / 480.0
+        }
+        10 -> {
+            longitude += 1.0 / 5760.0
+            latitude += 1.0 / 11520.0
+        }
+        else -> {
+            longitude += 1.0 / 24.0
+            latitude += 1.0 / 48.0
+        }
+    }
+    return GeoPos(latitude.round(6), longitude.round(6))
 }
 
-fun positionToQth(latitude: Double, longitude: Double): String? {
+/**
+ * Converts a GeoPos to a Maidenhead locator (QTH grid square).
+ * Default precision is 8 characters (4 pairs) giving 30" lon x 15" lat resolution,
+ * matching common 8-char grid square tools. Pass precision = 6 for the classic
+ * 5' x 2.5' resolution, or precision = 10 for the finest 1.25" x 0.625" resolution.
+ */
+fun positionToQth(latitude: Double, longitude: Double, precision: Int = 8): String? {
     if (!isValidPosition(latitude, longitude)) return null
-    val newLongitude = if (longitude > 180.0) longitude else longitude + 180
+    val newLongitude = longitude + 180
     val newLatitude = latitude + 90
-    val lonFirst = (65 + (newLongitude / 20)).toInt().toChar()
-    val latFirst = (65 + (newLatitude / 10)).toInt().toChar()
-    val lonSecond = ((newLongitude / 2) % 10).toInt()
+    val lonFirst = (65 + (newLongitude / 20).toInt().coerceIn(0, 17)).toChar()
+    val latFirst = (65 + (newLatitude / 10).toInt().coerceIn(0, 17)).toChar()
+    val lonSecond = ((newLongitude % 20) / 2).toInt()
     val latSecond = (newLatitude % 10).toInt()
     val lonThird = (65 + (newLongitude % 2) * 12).toInt().toChar().lowercaseChar()
     val latThird = (65 + (newLatitude % 1) * 24).toInt().toChar().lowercaseChar()
-    return "$lonFirst$latFirst$lonSecond$latSecond$lonThird$latThird"
+    val qth = "$lonFirst$latFirst$lonSecond$latSecond$lonThird$latThird"
+    if (precision < 8) return qth
+    val lonFourth = ((newLongitude % (1.0 / 12.0)) * 120).toInt()
+    val latFourth = ((newLatitude % (1.0 / 24.0)) * 240).toInt()
+    val qth8 = "$qth$lonFourth$latFourth"
+    if (precision < 10) return qth8
+    val lonFifth = (65 + (newLongitude % (1.0 / 120.0)) * 2880).toInt().toChar().lowercaseChar()
+    val latFifth = (65 + (newLatitude % (1.0 / 240.0)) * 5760).toInt().toChar().lowercaseChar()
+    return "$qth8$lonFifth$latFifth"
 }
 
 private fun isValidPosition(lat: Double, lon: Double): Boolean {
@@ -51,5 +98,49 @@ private fun isValidPosition(lat: Double, lon: Double): Boolean {
 }
 
 private fun isValidLocator(locator: String): Boolean {
-    return locator.matches("[a-xA-X][a-xA-X]\\d\\d[a-xA-X][a-xA-X]".toRegex())
+    return locator.matches("[a-xA-X]{2}\\d{2}[a-xA-X]{2}(?:\\d{2}(?:[a-xA-X]{2})?)?".toRegex())
 }
+
+/**
+ * Returns the 4-char field+square part of a locator, e.g. "OL42ih45" -> "OL42".
+ * A 4-char input is returned as-is when valid.
+ */
+fun qthToSquare(locator: String): String {
+    val upper = locator.trim().uppercase()
+    return when {
+        upper.length >= 4 && isValidLocator(upper) -> upper.take(4)
+        upper.length == 4 && upper.matches("[a-xA-X]{2}\\d{2}".toRegex()) -> upper
+        else -> "----"
+    }
+}
+
+/**
+ * Builds the 3x3 grid of 4-char squares surrounding [square] (e.g. "OL42").
+ * Row 0 = north (lat +1), col 0 = west (lon -1). Handles field/square carry
+ * at boundaries (e.g. "AA00" wraps to "RR99" at the south-west corner).
+ * Mirrors the neighbor logic decompiled from the QTH定位器 app.
+ */
+fun qthNeighbors(square: String): List<String> {
+    if (square.length != 4) return emptyList()
+    val lonField = (square[0].uppercaseChar().code - 65).coerceIn(0, 17)
+    val latField = (square[1].uppercaseChar().code - 65).coerceIn(0, 17)
+    val lonSquare = square[2].digitToCharOrNull() ?: return emptyList()
+    val latSquare = square[3].digitToCharOrNull() ?: return emptyList()
+    val result = mutableListOf<String>()
+    for (dLat in 1 downTo -1) {          // north -> south
+        for (dLon in -1..1) {            // west -> east
+            var lf = lonField
+            var tf = latField
+            var ls = lonSquare + dLon
+            var ts = latSquare + dLat
+            if (ls < 0) { lf -= 1; ls = 9 } else if (ls > 9) { lf += 1; ls = 0 }
+            if (ts < 0) { tf -= 1; ts = 9 } else if (ts > 9) { tf += 1; ts = 0 }
+            lf = (lf + 18) % 18
+            tf = (tf + 18) % 18
+            result += "${('A' + lf).toChar()}${('A' + tf).toChar()}$ls$ts"
+        }
+    }
+    return result
+}
+
+private fun Char.digitToCharOrNull(): Int? = digitToIntOrNull()

core/domain/src/test/java/com/rtbishop/look4sat/core/domain/DopplerFrequencyCalculatorTest.kt

@@ -13,15 +13,12 @@ class DopplerFrequencyCalculatorTest {
         upHigh: Long = 145_500_000L,
         downLow: Long = 435_000_000L,
         downHigh: Long? = 435_500_000L,
-        inverted: Boolean = false,
-        info: String = "Linear Transponder",
-        downlinkMode: String? = "USB",
-        uplinkMode: String? = "LSB"
+        inverted: Boolean = false
     ) = SatRadio(
-        uuid = "linear", info = info, isAlive = true,
+        uuid = "linear", info = "Linear Transponder", isAlive = true,
         downlinkLow = downLow, downlinkHigh = downHigh,
-        downlinkMode = downlinkMode, uplinkLow = upLow, uplinkHigh = upHigh,
-        uplinkMode = uplinkMode, isInverted = inverted, catnum = 12345
+        downlinkMode = "USB", uplinkLow = upLow, uplinkHigh = upHigh,
+        uplinkMode = "LSB", isInverted = inverted, catnum = 12345
     )
 
     private fun fmTransponder() = SatRadio(
@@ -51,28 +48,6 @@ class DopplerFrequencyCalculatorTest {
         assertFalse(DopplerFrequencyCalculator.isLinearTransponder(xpdr))
     }
 
-    @Test
-    fun isNamedLinearTransponder_returnsTrueForLinearTransponderName() {
-        assertTrue(DopplerFrequencyCalculator.isNamedLinearTransponder(linearTransponder()))
-    }
-
-    @Test
-    fun isNamedLinearTransponder_returnsTrueForSsbTransponderName() {
-        val xpdr = linearTransponder(info = "Mode V/U SSB Transponder", downlinkMode = "USB", uplinkMode = "LSB")
-        assertTrue(DopplerFrequencyCalculator.isNamedLinearTransponder(xpdr))
-    }
-
-    @Test
-    fun isNamedLinearTransponder_returnsFalseForRangeEntryWithoutTransponderName() {
-        val driftingRangeEntry = linearTransponder(info = "Upper side band (drifting)")
-        assertFalse(DopplerFrequencyCalculator.isNamedLinearTransponder(driftingRangeEntry))
-    }
-
-    @Test
-    fun isNamedLinearTransponder_returnsFalseForFmRepeater() {
-        assertFalse(DopplerFrequencyCalculator.isNamedLinearTransponder(fmTransponder()))
-    }
-
     @Test
     fun computeUplinkFromDownlink_linear_noDoppler() {
         val xpdr = linearTransponder()
@@ -118,53 +93,6 @@ class DopplerFrequencyCalculatorTest {
         assertNull(result)
     }
 
-    @Test
-    fun computeDownlinkFromUplink_withPositiveOffset_addsOffsetToDownlink() {
-        val xpdr = linearTransponder()
-        val orbitalPos = pos(0.0)
-        val downlink = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
-            uplinkHz = 145_200_000L,
-            transponder = xpdr,
-            orbitalPos = orbitalPos,
-            offsetHz = 2_500L
-        )
-        assertEquals(435_202_500L, downlink)
-    }
-
-    @Test
-    fun computeUplinkFromDownlink_withPositiveOffset_subtractsOffsetBeforeMapping() {
-        val xpdr = linearTransponder()
-        val orbitalPos = pos(0.0)
-        val uplink = DopplerFrequencyCalculator.computeUplinkFromDownlinkWithOffset(
-            downlinkHz = 435_202_500L,
-            transponder = xpdr,
-            orbitalPos = orbitalPos,
-            offsetHz = 2_500L
-        )
-        assertEquals(145_200_000L, uplink)
-    }
-
-    @Test
-    fun computeOffsetRoundTrip_handlesNegativeOffset() {
-        val xpdr = linearTransponder()
-        val orbitalPos = pos(0.0)
-        val downlink = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
-            uplinkHz = 145_200_000L,
-            transponder = xpdr,
-            orbitalPos = orbitalPos,
-            offsetHz = -2_500L
-        )
-        assertEquals(435_197_500L, downlink)
-
-        val uplink = DopplerFrequencyCalculator.computeUplinkFromDownlinkWithOffset(
-            downlinkHz = downlink!!,
-            transponder = xpdr,
-            orbitalPos = orbitalPos,
-            offsetHz = -2_500L
-        )
-        assertEquals(145_200_000L, uplink)
-    }
-
     @Test
     fun computeUplinkFromDownlink_invertedTransponder() {
         val xpdr = linearTransponder(inverted = true, downHigh = 435_500_000L)

core/domain/src/test/java/com/rtbishop/look4sat/core/domain/QthConverterTest.kt

@@ -18,7 +18,9 @@
 package com.rtbishop.look4sat.core.domain
 
 import com.rtbishop.look4sat.core.domain.utility.positionToQth
+import com.rtbishop.look4sat.core.domain.utility.qthNeighbors
 import com.rtbishop.look4sat.core.domain.utility.qthToPosition
+import com.rtbishop.look4sat.core.domain.utility.qthToSquare
 import org.junit.Test
 
 class QthConverterTest {
@@ -26,21 +28,36 @@ class QthConverterTest {
     @Test
     fun `Given valid QTH returns correct POS`() {
         var result = qthToPosition("io91VL39FX")
-        assert(result?.latitude == 51.4792 && result.longitude == -0.2083)
+        assert(result?.latitude == 51.499913 && result.longitude == -0.22309)
         result = qthToPosition("gf15vc")
-        assert(result?.latitude == -34.8958 && result.longitude == -56.2083)
+        assert(result?.latitude == -34.895833 && result.longitude == -56.208333)
+        // 8-char locators: finer 30" x 15" cell center
+        result = qthToPosition("io91vl47")
+        assert(result?.latitude == 51.489583 && result.longitude == -0.2125)
+        result = qthToPosition("jn58td25")
+        assert(result?.latitude == 48.147917 && result.longitude == 11.604167)
     }
 
     @Test
     fun `Given invalid QTH returns null`() {
         assert(qthToPosition("ZZ00zz") == null)
         assert(qthToPosition("JN58") == null)
+        assert(qthToPosition("io9") == null)
+        assert(qthToPosition("IO91VL7") == null)
+        assert(qthToPosition("IO91VL4X") == null)
     }
 
     @Test
     fun `Given valid POS returns correct QTH`() {
-        assert(positionToQth(51.4878, -0.2146) == "IO91vl")
-        assert(positionToQth(48.1466, 11.6083) == "JN58td")
+        // default precision is 8 chars
+        assert(positionToQth(51.4878, -0.2146) == "IO91vl47")
+        assert(positionToQth(48.1466, 11.6083) == "JN58td25")
+        // 6-char precision still available for backwards compatibility
+        assert(positionToQth(51.4878, -0.2146, 6) == "IO91vl")
+        assert(positionToQth(48.1466, 11.6083, 6) == "JN58td")
+        // 10-char precision
+        assert(positionToQth(51.4878, -0.2146, 10) == "IO91vl47fb")
+        assert(positionToQth(48.1466, 11.6083, 10) == "JN58td25xe")
     }
 
     @Test
@@ -48,4 +65,61 @@ class QthConverterTest {
         assert(positionToQth(91.0542, -170.1142) == null)
         assert(positionToQth(89.0542, -240.1142) == null)
     }
+
+    @Test
+    fun `Given boundary POS stays in valid grid`() {
+        // antipodal / edge cases must not overflow the A-R / 0-9 / a-x alphabet
+        assert(positionToQth(-90.0, -180.0, 8) == "AA00aa00")
+        assert(positionToQth(90.0, 180.0, 8) == "RR00aa00")
+        assert(positionToQth(0.0, 0.0, 8) == "JJ00aa00")
+        // roundtrip stability: 8-char roundtrip is stable across a sample of positions
+        val positions = listOf(
+            Pair(51.4878, -0.2146), Pair(48.1466, 11.6083), Pair(-33.8688, 151.2093),
+            Pair(39.9042, 116.4074), Pair(35.6895, 139.6917), Pair(41.714, -72.727)
+        )
+        positions.forEach { (lat, lon) ->
+            val qth = positionToQth(lat, lon, 8)
+            val pos = qthToPosition(qth!!)
+            val qth2 = positionToQth(pos!!.latitude, pos.longitude, 8)
+            assert(qth == qth2) { "Roundtrip failed for ($lat, $lon): $qth -> $qth2" }
+        }
+    }
+
+    @Test
+    fun `Given square returns correct 3x3 neighbors`() {
+        // Reference grid from the QTH定位器 screenshot: OL42
+        val neighbors = qthNeighbors("OL42")
+        assert(neighbors == listOf(
+            "OL33", "OL43", "OL53",
+            "OL32", "OL42", "OL52",
+            "OL31", "OL41", "OL51"
+        )) { "OL42 grid mismatch: $neighbors" }
+        // Center cell must be the input itself
+        assert(neighbors[4] == "OL42")
+        // 9 cells, all distinct
+        assert(neighbors.size == 9 && neighbors.toSet().size == 9)
+    }
+
+    @Test
+    fun `Given boundary square wraps fields correctly`() {
+        // South-west corner: AA00 neighbors wrap to RR99 / RA90 etc.
+        val sw = qthNeighbors("AA00")
+        assert(sw.size == 9 && sw.toSet().size == 9)
+        assert(sw[0] == "RA91" && sw[4] == "AA00" && sw[6] == "RR99" && sw[8] == "AR19")
+        // North-east corner: RR99 wraps to AA00
+        val ne = qthNeighbors("RR99")
+        assert(ne.size == 9 && ne.toSet().size == 9)
+        assert(ne[0] == "RA80" && ne[4] == "RR99" && ne[8] == "AR08")
+        // Field boundary: IO91's east neighbors cross into J field
+        val london = qthNeighbors("IO91")
+        assert(london[2] == "JO02" && london[5] == "JO01")
+    }
+
+    @Test
+    fun `Given full locator returns square part`() {
+        assert(qthToSquare("OL42ih45") == "OL42")
+        assert(qthToSquare("io91VL39FX") == "IO91")
+        assert(qthToSquare("JN58") == "JN58")
+        assert(qthToSquare("garbage!!") == "----")
+    }
 }

core/presentation/src/main/java/com/rtbishop/look4sat/core/presentation/Navigation.kt

@@ -21,27 +21,36 @@ import androidx.navigation3.runtime.NavKey
 import kotlinx.serialization.Serializable
 
 @Serializable
-sealed class Screen(val iconResId: Int, val titleResId: Int) : NavKey {
+sealed class Screen(val iconResId: Int, val titleResId: Int, val screenId: String) : NavKey {
 
     @Serializable
-    data object Satellites : Screen(R.drawable.ic_satellites, R.string.nav_sat)
+    data object Satellites : Screen(R.drawable.ic_satellites, R.string.nav_sat, "Satellites")
 
     @Serializable
-    data object Passes : Screen(R.drawable.ic_passes, R.string.nav_pass)
+    data object Passes : Screen(R.drawable.ic_passes, R.string.nav_pass, "Passes")
 
     @Serializable
-    data object Radar : Screen(R.drawable.ic_radar, R.string.nav_radar)
+    data object Radar : Screen(R.drawable.ic_radar, R.string.nav_radar, "Radar")
 
     @Serializable
-    data object Map : Screen(R.drawable.ic_map, R.string.nav_map)
+    data object Map : Screen(R.drawable.ic_map, R.string.nav_map, "Map")
 
     @Serializable
-    data object Mutual : Screen(R.drawable.ic_match, R.string.nav_mutual)
+    data object Mutual : Screen(R.drawable.ic_match, R.string.nav_mutual, "Mutual")
 
     @Serializable
-    data object Settings : Screen(R.drawable.ic_settings, R.string.nav_prefs)
+    data object Roaming : Screen(R.drawable.ic_roaming, R.string.nav_roaming, "Roaming")
+
+    @Serializable
+    data object CwDecode : Screen(R.drawable.ic_cw, R.string.nav_cw, "CwDecode")
+
+    @Serializable
+    data object Settings : Screen(R.drawable.ic_settings, R.string.nav_prefs, "Settings")
 }
 
+// UI 设置: 默认页面顺序(与 MainScreen navItems 一致)
+val defaultScreenOrder = listOf("Satellites", "Passes", "Radar", "Mutual", "Roaming", "CwDecode", "Map", "Settings")
+
 @Serializable
 data object RadarDestination : NavKey
 
@@ -70,4 +79,4 @@ class DeeplinkResolver(private val fallbackDestination: NavKey = Screen.Passes)
         matchers.forEach { it.match(deeplink)?.let { match -> return match } }
         return fallbackDestination
     }
-}
+}

core/presentation/src/main/res/drawable/ic_cw.xml

@@ -0,0 +1,15 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+
+    <!-- Morse style icon: a dot above a dash -->
+    <path
+        android:fillColor="#FFFFFFFF"
+        android:pathData="M 8 4 L 16 4 L 16 8 L 8 8 Z" />
+
+    <path
+        android:fillColor="#FFFFFFFF"
+        android:pathData="M 3 16 L 21 16 L 21 20 L 3 20 Z" />
+</vector>

core/presentation/src/main/res/drawable/ic_reset.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M12,6v3l4,-4 -4,-4v3c-4.42,0 -8,3.58 -8,8 0,1.57 0.46,3.03 1.24,4.26L6.7,14.8c-0.45,-0.83 -0.7,-1.79 -0.7,-2.8 0,-3.31 2.69,-6 6,-6zM18.76,7.74L17.3,9.2c0.44,0.84 0.7,1.79 0.7,2.8 0,3.31 -2.69,6 -6,6v-3l-4,4 4,4v-3c4.42,0 8,-3.58 8,-8 0,-1.57 -0.46,-3.03 -1.24,-4.26z" />
+</vector>

core/presentation/src/main/res/drawable/ic_roaming.xml

@@ -0,0 +1,25 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="96"
+    android:viewportHeight="96">
+
+    <!-- Crosshair / grid-locator style icon: concentric rings + center dot -->
+    <path
+        android:fillColor="@android:color/transparent"
+        android:strokeColor="@android:color/white"
+        android:strokeWidth="6"
+        android:strokeLineCap="round"
+        android:strokeLineJoin="round"
+        android:pathData="M 48 12 L 48 84 M 12 48 L 84 48" />
+
+    <path
+        android:fillColor="@android:color/transparent"
+        android:strokeColor="@android:color/white"
+        android:strokeWidth="6"
+        android:pathData="M 48 26 A 22 22 0 1 0 48.1 26" />
+
+    <path
+        android:fillColor="@android:color/white"
+        android:pathData="M 44 44 L 52 44 L 52 52 L 44 52 Z" />
+</vector>

core/presentation/src/main/res/values-tr/strings.xml

@@ -10,6 +10,7 @@
     <string name="nav_sat">Uydular</string>
     <string name="nav_pass">Geçişler</string>
     <string name="nav_radar">Radar</string>
+    <string name="nav_cw">CW Dekoder</string>
     <string name="nav_map">Harita</string>
     <string name="nav_prefs">Ayarlar</string>
 
@@ -50,13 +51,9 @@
         Ayarlar\'dan GPS, Enlem/Boylam veya QTH kullanarak konumunuzu belirlediğinizden emin olun.
         \n\nDoğru tahminler alabilmek için veritabanını en az haftada bir güncelleyin.</string>
     <string name="pass_whatsnew_title" translatable="false">What\'s new in Look4Sat</string>
-    <string name="pass_whatsnew_message" translatable="false">
-        * Switched to short-form commands in NetworkReporter, by theojalba
-        \n* Added CAT radio control for full-duplex SAT operation, by jcmerg
-        \n* Added normalized time for passes AOS/LOS, fixed refresh state bug
-        \n* Added multiple performance tweaks, improved passes calculation
-        \n* Fixed UTC pass time problem mentioned in issue #201
-    </string>
+        <string name="pass_whatsnew_message" translatable="false">
+        * Transponder CW kod çözücü paneli artık geliştirilmiş kod çözme motorunu canlı şelale (waterfall) görüntüsüyle kullanıyor
+        * CW kod çözme sayfaları aynı motoru paylaşıyor: gezinme sayfası ve transponder paneli</string>
 
     <!-- Radar screen -->
     <string name="radar_back">Geri</string>
@@ -103,7 +100,7 @@
     <string name="map_visible">Görünür</string>
 
     <!-- Settings screen -->
-    <string name="prefs_app_title" translatable="false">Look4Sat v%s</string>
+    <string name="prefs_app_title" translatable="false">Look4Sat Pro v%s</string>
     <string name="prefs_app_url" translatable="false">https://play.google.com/store/apps/details?id=com.rtbishop.look4sat</string>
     <string name="prefs_donate_title">Bağış yap</string>
     <string name="prefs_donate_url" translatable="false">https://ko-fi.com/rt_bishop</string>
@@ -137,7 +134,7 @@
     <string name="prefs_data_entries">Uydular: %s</string>
     <string name="prefs_data_radios">Transceiver\'lar: %s</string>
     <string name="prefs_data_update">Güncelle</string>
-    <string name="prefs_data_import">İçe aktar</string>
+    <string name="prefs_data_import">Özel URL</string>
     <string name="prefs_data_clear">Temizle</string>
     <string name="prefs_data_clear_success">Veriler başarıyla temizlendi</string>
     <string name="prefs_data_update_success">Güncelleme başarıyla tamamlandı</string>
@@ -146,6 +143,7 @@
     <string name="prefs_data_sources_tle_switch">Özel TLE URL</string>
     <string name="prefs_data_sources_transceivers_switch">Özel transceiver URL</string>
     <string name="prefs_data_sources_url_title" translatable="false">URL (HTTPS)</string>
+    <string name="prefs_data_reset_url">Varsayılan URL\'ye sıfırla</string>
 
     <string name="prefs_data_output_title">Veri aktarımı</string>
     <string name="prefs_net_output">Ağ</string>
@@ -181,6 +179,9 @@
     <string name="prefs_net_perm_error">Ağ izninizi kontrol edin</string>
 
     <string name="prefs_other_title">Diğer ayarlar</string>
+    <string name="prefs_ui_title">UI Ayarları</string>
+    <string name="prefs_ui_order_title">Sayfa sırası</string>
+    <string name="prefs_ui_order_reset">Sıralamayı sıfırla</string>
     <string name="prefs_other_switch_utc">Geçiş saatini UTC olarak göster</string>
     <string name="prefs_other_switch_update">Otomatik veri güncellemeyi etkinleştir</string>
     <string name="prefs_other_switch_sweep">Radar taramasını etkinleştir</string>
@@ -192,7 +193,7 @@
     <string name="prefs_highlight_mid">Orta %1$d-%2$d°</string>
     <string name="prefs_highlight_high">Yüksek &gt; %1$d°</string>
 
-    <string name="prefs_outro_title">Teşekkürler</string>
+    <string name="prefs_outro_title">BG7NTA ve orijinal yazar teşekkür eder</string>
     <string name="prefs_outro_thanks" translatable="false">
         • Look4Sat users and contributors!
         \n• David A. B. Johnson (predict4java)
@@ -200,7 +201,8 @@
         \n• Alexandru Csete (Gpredict)
         \n• Dr T.S. Kelso (Celestrak)
         \n• Libre Space Foundation (SatNOGS)
-        \n• BG7NTA (CW decoding feature)</string>
+        \n• BA7OPF (pass matching feature)
+        \n• BG7NTA</string>
     <string name="prefs_outro_license">Bu uygulama herhangi bir garanti sunmaz</string>
 
 </resources>

core/presentation/src/main/res/values-zh/strings.xml

@@ -10,6 +10,8 @@
     <string name="nav_pass">过境</string>
     <string name="nav_radar">雷达</string>
     <string name="nav_mutual">匹配</string>
+    <string name="nav_roaming">漫游</string>
+    <string name="nav_cw">CW解码</string>
     <string name="nav_map">地图</string>
     <string name="nav_prefs">设置</string>
 
@@ -38,6 +40,10 @@
     <string name="pass_error_message">没有即将过境的卫星</string>
     <string name="pass_welcome_title">欢迎来到 Look4Sat\!</string>
     <string name="pass_welcome_message">请务必在设置中通过GPS、经纬度或QTH定位您的位置\n建议至少每周更新一次数据库，以确保预测结果的准确性</string>
+    <string name="pass_whatsnew_title">Look4Sat Pro 更新内容</string>
+        <string name="pass_whatsnew_message" translatable="false">
+        * 转发器 CW 解码面板已接入增强解码引擎,带实时瀑布图显示
+        * CW 解码入口共用同一引擎:导航页与转发器面板</string>
 
     <!-- Radar screen -->
     <string name="radar_back">后退</string>
@@ -92,7 +98,7 @@
     <string name="prefs_updated_title">更新：%s</string>
     <string name="prefs_updated_time">yyyy MMM d - HH:mm:ss</string>
 
-    <string name="prefs_loc_title">站点位置</string>
+    <string name="prefs_loc_title">站位</string>
     <string name="prefs_loc_gps_title">GPS 定位</string>
     <string name="prefs_loc_gps_error">检查您的位置权限</string>
     <string name="prefs_loc_input_title">输入位置</string>
@@ -100,17 +106,17 @@
     <string name="prefs_loc_qth_title">QTH 网格</string>
     <string name="prefs_loc_qth_error">无效的 QTH 网格</string>
     <string name="prefs_loc_success">位置更新成功</string>
-    <string name="prefs_station_title">站点位置设置</string>
-    <string name="prefs_station_lat_text">输入站点的纬度</string>
-    <string name="prefs_station_lon_text">输入站点的经度</string>
+    <string name="prefs_station_title">站位设置</string>
+    <string name="prefs_station_lat_text">输入站位的纬度</string>
+    <string name="prefs_station_lon_text">输入站位的经度</string>
     <string name="prefs_locator_title">QTH 网格</string>
-    <string name="prefs_locator_text">使用梅登黑德网格设置站点位置</string>
+    <string name="prefs_locator_text">使用梅登黑德网格设置站位</string>
 
     <string name="prefs_data_title">卫星数据更新</string>
     <string name="prefs_data_entries">卫星：%s</string>
     <string name="prefs_data_radios">收发器：%s</string>
     <string name="prefs_data_update">在线更新</string>
-    <string name="prefs_data_import">导入文件</string>
+    <string name="prefs_data_import">自定义URL</string>
     <string name="prefs_data_clear">清空</string>
     <string name="prefs_data_clear_success">数据清空成功</string>
     <string name="prefs_data_update_success">更新成功</string>
@@ -156,6 +162,9 @@
     <string name="rc_enable_switch">启用 CAT 控制</string>
 
     <string name="prefs_other_title">其他设置</string>
+    <string name="prefs_ui_title">UI设置</string>
+    <string name="prefs_ui_order_title">页面顺序</string>
+    <string name="prefs_ui_order_reset">重置顺序</string>
     <string name="prefs_other_switch_utc">以 UTC 时间显示</string>
     <string name="prefs_other_switch_update">启用卫星数据自动更新</string>
     <string name="prefs_other_switch_sweep">启用雷达扫描动画</string>
@@ -167,7 +176,7 @@
     <string name="prefs_highlight_mid">中 %1$d-%2$d°</string>
     <string name="prefs_highlight_high">高 &gt; %1$d°</string>
 
-    <string name="prefs_outro_title">我要感谢：</string>
+    <string name="prefs_outro_title">BG7NTA 与原作者感谢：</string>
     <string name="prefs_outro_thanks" translatable="false">
         • Look4Sat 所有用户及贡献者!
         \n• David A. B. Johnson (predict4java)
@@ -176,39 +185,8 @@
         \n• Dr T.S. Kelso (Celestrak)
         \n• Libre Space Foundation (SatNOGS)
         \n• xdsopl 和 Robot36 贡献者!
-        \n• BG7NTA（CW解码功能）</string>
+        \n• BA7OPF(过境匹配功能)
+        \n• BG7NTA</string>
     <string name="prefs_outro_license">该应用程序不提供任何保修.</string>
 
-    <!-- 匹配页 Mutual match page -->
-    <string name="mutual_title">过境匹配</string>
-    <string name="mutual_station_you">你的位置</string>
-    <string name="mutual_station_opposite">友台位置</string>
-    <string name="mutual_label_you">你</string>
-    <string name="mutual_label_opposite">友台</string>
-    <string name="mutual_status_calculating">正在计算双方共同可见窗口…</string>
-    <string name="mutual_status_error">请修正提示后重新查询</string>
-    <string name="mutual_status_matches">找到 %d 个匹配 · 点击卡片展开曲线</string>
-    <string name="mutual_status_none">未找到共同可见窗口，调整时间或仰角后重试</string>
-    <string name="mutual_status_idle">输入双方位置后点击查询</string>
-    <string name="mutual_chip_calculating">计算中</string>
-    <string name="mutual_chip_error">有错误</string>
-    <string name="mutual_chip_matches">%d 个匹配</string>
-    <string name="mutual_chip_none">无匹配</string>
-    <string name="mutual_chip_idle">待查询</string>
-    <string name="mutual_use_current">填入当前位置</string>
-    <string name="mutual_lat">纬度</string>
-    <string name="mutual_lon">经度</string>
-    <string name="mutual_grid">网格</string>
-    <string name="mutual_grid_hint">支持 4/6/8 位 Maidenhead 网格；也可直接输入经纬度</string>
-    <string name="mutual_min_elevation">最小仰角：%d°</string>
-    <string name="mutual_time_range">时间范围</string>
-    <string name="mutual_calculating">计算中…</string>
-    <string name="mutual_query">查询匹配</string>
-    <string name="mutual_elevation_you">你：%d°</string>
-    <string name="mutual_elevation_opposite">友台：%d°</string>
-    <string name="mutual_both_tracks">双方轨迹</string>
-    <string name="mutual_open_radar">查看雷达</string>
-    <string name="mutual_station_a">站点A</string>
-    <string name="mutual_station_b">站点B</string>
-
 </resources>

core/presentation/src/main/res/values/strings.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <!-- Commmon -->
-    <string name="app_name" translatable="false">Look4Sat</string>
+    <string name="app_name" translatable="false">Look4Sat Pro</string>
     <string name="btn_accept">Accept</string>
     <string name="btn_cancel">Cancel</string>
     <string name="empty_list_message">No data to show</string>
@@ -11,6 +11,8 @@
     <string name="nav_pass">Passes</string>
     <string name="nav_radar">Radar</string>
     <string name="nav_mutual">Match</string>
+    <string name="nav_roaming">Roaming</string>
+    <string name="nav_cw">CW Decoder</string>
     <string name="nav_map">Map</string>
     <string name="nav_prefs">Settings</string>
 
@@ -51,10 +53,9 @@
         Make sure to set your position via GPS, Lat/Lon or QTH in Settings.
         \n\nPlease update the database at least weekly to get accurate predictions.</string>
     <string name="pass_whatsnew_title" translatable="false">What\'s new in Look4Sat</string>
-    <string name="pass_whatsnew_message" translatable="false">
-        * Added required tweaks to support Android 17 (API 37)
-        \n\n* Added ACCESS_LOCAL_NETWORK permission check to support network data output
-    </string>
+        <string name="pass_whatsnew_message" translatable="false">
+        * Transponder CW decoder panel now uses the enhanced decoding engine with a live waterfall display
+        * CW decoding pages share the same engine: navigation page and transponder panel</string>
 
     <!-- Radar screen -->
     <string name="radar_back">Back</string>
@@ -111,7 +112,7 @@
     <string name="map_visible">Visible</string>
 
     <!-- Settings screen -->
-    <string name="prefs_app_title" translatable="false">Look4Sat v%s</string>
+    <string name="prefs_app_title" translatable="false">Look4Sat Pro v%s</string>
     <string name="prefs_app_url" translatable="false">https://play.google.com/store/apps/details?id=com.rtbishop.look4sat</string>
     <string name="prefs_donate_title">Donate</string>
     <string name="prefs_donate_url" translatable="false">https://ko-fi.com/rt_bishop</string>
@@ -145,7 +146,7 @@
     <string name="prefs_data_entries">Satellites: %s</string>
     <string name="prefs_data_radios">Transceivers: %s</string>
     <string name="prefs_data_update">Update</string>
-    <string name="prefs_data_import">Import</string>
+    <string name="prefs_data_import">Custom URL</string>
     <string name="prefs_data_clear">Clear</string>
     <string name="prefs_data_clear_success">Data was cleared successfully</string>
     <string name="prefs_data_update_success">Update completed successfully</string>
@@ -156,6 +157,7 @@
     <string name="prefs_data_sources_tle_switch">Custom TLE URL</string>
     <string name="prefs_data_sources_transceivers_switch">Custom transceivers URL</string>
     <string name="prefs_data_sources_url_title" translatable="false">URL (HTTPS)</string>
+    <string name="prefs_data_reset_url">Reset to default URL</string>
 
     <string name="prefs_data_output_title">Data output</string>
     <string name="prefs_net_output">Network</string>
@@ -191,6 +193,9 @@
     <string name="prefs_net_perm_error">Check your network permission</string>
 
     <string name="prefs_other_title">Other settings</string>
+    <string name="prefs_ui_title">UI Settings</string>
+    <string name="prefs_ui_order_title">Page order</string>
+    <string name="prefs_ui_order_reset">Reset order</string>
     <string name="prefs_other_switch_utc">Show pass time in UTC</string>
     <string name="prefs_other_switch_update">Enable automatic data update</string>
     <string name="prefs_other_switch_sweep">Enable radar sweep animation</string>
@@ -202,7 +207,7 @@
     <string name="prefs_highlight_mid">Mid %1$d–%2$d°</string>
     <string name="prefs_highlight_high">High &gt; %1$d°</string>
 
-    <string name="prefs_outro_title">I would like to say thanks to</string>
+    <string name="prefs_outro_title">BG7NTA &amp; the original author would like to thank</string>
     <string name="prefs_outro_thanks" translatable="false">
         * Look4Sat users and contributors!
         \n* David A. B. Johnson (predict4java)
@@ -211,40 +216,9 @@
         \n* Dr T.S. Kelso (Celestrak)
         \n* Libre Space Foundation (SatNOGS)
         \n* xdsopl and Robot36 contributors!
-        \n* BG7NTA (CW decoding feature)
+        \n* BA7OPF (pass matching feature)
+        \n* BG7NTA
     </string>
     <string name="prefs_outro_license">The app comes with no warranty</string>
 
-    <!-- Mutual match page -->
-    <string name="mutual_title">Pass Match</string>
-    <string name="mutual_station_you">Your Station</string>
-    <string name="mutual_station_opposite">Opposite Station</string>
-    <string name="mutual_label_you">You</string>
-    <string name="mutual_label_opposite">Opposite</string>
-    <string name="mutual_status_calculating">Calculating mutual visibility windows…</string>
-    <string name="mutual_status_error">Fix the reported issues and retry</string>
-    <string name="mutual_status_matches">%d matches found · tap a card to expand</string>
-    <string name="mutual_status_none">No mutual windows found. Adjust time or min elevation and retry</string>
-    <string name="mutual_status_idle">Enter both stations, then tap Query</string>
-    <string name="mutual_chip_calculating">Calculating</string>
-    <string name="mutual_chip_error">Error</string>
-    <string name="mutual_chip_matches">%d matches</string>
-    <string name="mutual_chip_none">No matches</string>
-    <string name="mutual_chip_idle">Idle</string>
-    <string name="mutual_use_current">Use current</string>
-    <string name="mutual_lat">Lat</string>
-    <string name="mutual_lon">Lon</string>
-    <string name="mutual_grid">Grid</string>
-    <string name="mutual_grid_hint">Supports 4/6/8-char Maidenhead grid; or enter lat/lon directly</string>
-    <string name="mutual_min_elevation">Min elevation: %d°</string>
-    <string name="mutual_time_range">Time range</string>
-    <string name="mutual_calculating">Calculating…</string>
-    <string name="mutual_query">Query Match</string>
-    <string name="mutual_elevation_you">You: %d°</string>
-    <string name="mutual_elevation_opposite">Opposite: %d°</string>
-    <string name="mutual_both_tracks">Both tracks</string>
-    <string name="mutual_open_radar">Open Radar</string>
-    <string name="mutual_station_a">Station A</string>
-    <string name="mutual_station_b">Station B</string>
-
 </resources>

feature/cw/src/main/java/com/ve3nea/morse_expert/MainActivity.java

@@ -139,7 +139,7 @@ public class MainActivity {
     public void onResume() {
         android.content.SharedPreferences prefs = mActivity.getSharedPreferences(
             mActivity.getPackageName() + "_preferences", Context.MODE_PRIVATE);
-        String messageType = prefs.getString("message_type", "ham_radio_qso");
+        String messageType = prefs.getString("message_type", "general_text");
         b bVar = this.f11037F;
         if (bVar != null) {
             bVar.f623s.set(messageType.equals("ham_radio_qso"));

feature/cw/src/main/java/g3/d.java

@@ -4,6 +4,6 @@ package g3;
 public abstract class d {
 
     /* renamed from: a, reason: collision with root package name */
-    public static final double[][] f11591a = {new double[]{0.0d, 0.0d}, new double[]{9.760860120877624E-4d, -3.903230345984362E-11d}, new double[]{0.0019512202125042677d, -8.124251825289188E-11d}, new double[]{0.0029254043474793434d, -1.8374207360194882E-11d}, new double[]{0.0038986406289041042d, -2.1324678121885073E-10d}, new double[]{0.004870930686593056d, -4.5199654318611534E-10d}, new double[]{0.00584227591753006d, -2.933016992001806E-10d}, new double[]{0.006812678650021553d, -2.325147219074669E-10d}, new double[]{0.007782140746712685d, -3.046577356838847E-10d}, new double[]{0.008750664070248604d, -5.500631513861575E-10d}, new double[]{0.00971824862062931d, 8.48292035519895E-10d}, new double[]{0.010684899985790253d, 1.1422610134013436E-10d}, new double[]{0.01165061630308628d, 9.168889933128375E-10d}, new double[]{0.012615403160452843d, -5.303786078838E-10d}, new double[]{0.013579258695244789d, -5.688639355498786E-10d}, new double[]{0.01454218477010727d, 7.296670293275653E-10d}, new double[]{0.015504186972975731d, -4.370104767451421E-10d}, new double[]{0.016465261578559875d, 1.43695591408832E-9d}, new double[]{0.01742541790008545d, -1.1862263158849434E-9d}, new double[]{0.018384650349617004d, -9.482976524690715E-10d}, new double[]{0.01934296265244484d, 1.9068609515836638E-10d}, new double[]{0.020300358533859253d, 2.655990315697216E-10d}, new double[]{0.021256837993860245d, 1.0315548713040775E-9d}, new double[]{0.022212404757738113d, 5.13345647019085E-10d}, new double[]{0.02316705882549286d, 4.5604151934208014E-10d}, new double[]{0.02412080392241478d, -1.1255706987475148E-9d}, new double[]{0.025073636323213577d, 1.2289023836765196E-9d}, new double[]{0.02602556347846985d, 1.7990281828096504E-9d}, new double[]{0.026976589113473892d, -1.4152718164638451E-9d}, new double[]{0.02792670577764511d, 7.568772963781632E-10d}, new double[]{0.0288759246468544d, -1.1449998592111558E-9d}, new double[]{0.029824241995811462d, -1.6850976862319495E-9d}, new double[]{0.030771657824516296d, 8.422373919843096E-10d}, new double[]{0.0317181795835495d, 6.872350402175489E-10d}, new double[]{0.03266380727291107d, -4.541194749189272E-10d}, new double[]{0.03360854089260101d, -8.9064764856495E-10d}, new double[]{0.034552380442619324d, 1.0640404096769032E-9d}, new double[]{0.0354953333735466d, -3.5901655945224663E-10d}, new double[]{0.03643739968538284d, -3.4829517943661266E-9d}, new double[]{0.037378571927547455d, 8.149473794244232E-10d}, new double[]{0.03831886500120163d, -6.990650304449166E-10d}, new double[]{0.03925827145576477d, 1.0883076226453258E-9d}, new double[]{0.040196798741817474d, 3.845192807999274E-10d}, new double[]{0.04113444685935974d, -1.1570594692045927E-9d}, new double[]{0.04207121580839157d, -1.8877045166697178E-9d}, new double[]{0.043007105588912964d, -1.6332083257987747E-10d}, new double[]{0.04394212365150452d, -1.7950057534514933E-9d}, new double[]{0.04487626254558563d, 2.302710041648838E-9d}, new double[]{0.045809537172317505d, -1.1410233017161343E-9d}, new double[]{0.04674194008111954d, -3.0498741599744685E-9d}, new double[]{0.04767347127199173d, -1.8026348269183678E-9d}, new double[]{0.04860413819551468d, -3.233204600453039E-9d}, new double[]{0.04953393340110779d, 1.7211688427961583E-9d}, new double[]{0.05046287178993225d, -2.329967807055457E-10d}, new double[]{0.05139094591140747d, -4.191810118556531E-11d}, new double[]{0.052318163216114044d, -3.5574324788328143E-9d}, new double[]{0.053244516253471375d, -1.7346590916458485E-9d}, new double[]{0.05417001247406006d, -4.343048751383674E-10d}, new double[]{0.055094651877880096d, 1.92909364037955E-9d}, new double[]{0.056018441915512085d, -5.139745677199588E-10d}, new double[]{0.05694137513637543d, 1.2637629975129189E-9d}, new double[]{0.05786345899105072d, 1.3840561112481119E-9d}, new double[]{0.058784693479537964d, 1.414889689612056E-9d}, new double[]{0.05970507860183716d, 2.9199191907666474E-9d}, new double[]{0.0606246218085289d, 7.90594243412116E-12d}, new double[]{0.06154331564903259d, 1.6844747839686189E-9d}, new double[]{0.06246116757392883d, 2.0498074572151747E-9d}, new double[]{0.06337818503379822d, -4.800180493433863E-9d}, new double[]{0.06429435312747955d, -2.4220822960064277E-9d}, new double[]{0.06520968675613403d, -4.179048566709334E-9d}, new double[]{0.06612417101860046d, 6.363872957010456E-9d}, new double[]{0.06703783571720123d, 9.339468680056365E-10d}, new double[]{0.06795066595077515d, -4.04226739708981E-9d}, new double[]{0.0688626617193222d, -7.043545052852817E-9d}, new double[]{0.06977382302284241d, -6.552819560439773E-9d}, new double[]{0.07068414986133575d, -1.0571674860370546E-9d}, new double[]{0.07159365713596344d, -3.948954622015801E-9d}, new double[]{0.07250232994556427d, 1.1776625988228244E-9d}, new double[]{0.07341018319129944d, 9.221072639606492E-10d}, new double[]{0.07431721687316895d, -3.219119568928366E-9d}, new double[]{0.0752234160900116d, 5.147575929018918E-9d}, new double[]{0.07612881064414978d, -2.291749683541979E-9d}, new doubleLine truncated
+    public static final double[][] f11591a = {new double[]{0.0d, 0.0d}, new double[]{9.760860120877624E-4d, -3.903230345984362E-11d}, new double[]{0.0019512202125042677d, -8.124251825289188E-11d}, new double[]{0.0029254043474793434d, -1.8374207360194882E-11d}, new double[]{0.0038986406289041042d, -2.1324678121885073E-10d}, new double[]{0.004870930686593056d, -4.5199654318611534E-10d}, new double[]{0.00584227591753006d, -2.933016992001806E-10d}, new double[]{0.006812678650021553d, -2.325147219074669E-10d}, new double[]{0.007782140746712685d, -3.046577356838847E-10d}, new double[]{0.008750664070248604d, -5.500631513861575E-10d}, new double[]{0.00971824862062931d, 8.48292035519895E-10d}, new double[]{0.010684899985790253d, 1.1422610134013436E-10d}, new double[]{0.01165061630308628d, 9.168889933128375E-10d}, new double[]{0.012615403160452843d, -5.303786078838E-10d}, new double[]{0.013579258695244789d, -5.688639355498786E-10d}, new double[]{0.01454218477010727d, 7.296670293275653E-10d}, new double[]{0.015504186972975731d, -4.370104767451421E-10d}, new double[]{0.016465261578559875d, 1.43695591408832E-9d}, new double[]{0.01742541790008545d, -1.1862263158849434E-9d}, new double[]{0.018384650349617004d, -9.482976524690715E-10d}, new double[]{0.01934296265244484d, 1.9068609515836638E-10d}, new double[]{0.020300358533859253d, 2.655990315697216E-10d}, new double[]{0.021256837993860245d, 1.0315548713040775E-9d}, new double[]{0.022212404757738113d, 5.13345647019085E-10d}, new double[]{0.02316705882549286d, 4.5604151934208014E-10d}, new double[]{0.02412080392241478d, -1.1255706987475148E-9d}, new double[]{0.025073636323213577d, 1.2289023836765196E-9d}, new double[]{0.02602556347846985d, 1.7990281828096504E-9d}, new double[]{0.026976589113473892d, -1.4152718164638451E-9d}, new double[]{0.02792670577764511d, 7.568772963781632E-10d}, new double[]{0.0288759246468544d, -1.1449998592111558E-9d}, new double[]{0.029824241995811462d, -1.6850976862319495E-9d}, new double[]{0.030771657824516296d, 8.422373919843096E-10d}, new double[]{0.0317181795835495d, 6.872350402175489E-10d}, new double[]{0.03266380727291107d, -4.541194749189272E-10d}, new double[]{0.03360854089260101d, -8.9064764856495E-10d}, new double[]{0.034552380442619324d, 1.0640404096769032E-9d}, new double[]{0.0354953333735466d, -3.5901655945224663E-10d}, new double[]{0.03643739968538284d, -3.4829517943661266E-9d}, new double[]{0.037378571927547455d, 8.149473794244232E-10d}, new double[]{0.03831886500120163d, -6.990650304449166E-10d}, new double[]{0.03925827145576477d, 1.0883076226453258E-9d}, new double[]{0.040196798741817474d, 3.845192807999274E-10d}, new double[]{0.04113444685935974d, -1.1570594692045927E-9d}, new double[]{0.04207121580839157d, -1.8877045166697178E-9d}, new double[]{0.043007105588912964d, -1.6332083257987747E-10d}, new double[]{0.04394212365150452d, -1.7950057534514933E-9d}, new double[]{0.04487626254558563d, 2.302710041648838E-9d}, new double[]{0.045809537172317505d, -1.1410233017161343E-9d}, new double[]{0.04674194008111954d, -3.0498741599744685E-9d}, new double[]{0.04767347127199173d, -1.8026348269183678E-9d}, new double[]{0.04860413819551468d, -3.233204600453039E-9d}, new double[]{0.04953393340110779d, 1.7211688427961583E-9d}, new double[]{0.05046287178993225d, -2.329967807055457E-10d}, new double[]{0.05139094591140747d, -4.191810118556531E-11d}, new double[]{0.052318163216114044d, -3.5574324788328143E-9d}, new double[]{0.053244516253471375d, -1.7346590916458485E-9d}, new double[]{0.05417001247406006d, -4.343048751383674E-10d}, new double[]{0.055094651877880096d, 1.92909364037955E-9d}, new double[]{0.056018441915512085d, -5.139745677199588E-10d}, new double[]{0.05694137513637543d, 1.2637629975129189E-9d}, new double[]{0.05786345899105072d, 1.3840561112481119E-9d}, new double[]{0.058784693479537964d, 1.414889689612056E-9d}, new double[]{0.05970507860183716d, 2.9199191907666474E-9d}, new double[]{0.0606246218085289d, 7.90594243412116E-12d}, new double[]{0.06154331564903259d, 1.6844747839686189E-9d}, new double[]{0.06246116757392883d, 2.0498074572151747E-9d}, new double[]{0.06337818503379822d, -4.800180493433863E-9d}, new double[]{0.06429435312747955d, -2.4220822960064277E-9d}, new double[]{0.06520968675613403d, -4.179048566709334E-9d}, new double[]{0.06612417101860046d, 6.363872957010456E-9d}, new double[]{0.06703783571720123d, 9.339468680056365E-10d}, new double[]{0.06795066595077515d, -4.04226739708981E-9d}, new double[]{0.0688626617193222d, -7.043545052852817E-9d}, new double[]{0.06977382302284241d, -6.552819560439773E-9d}, new double[]{0.07068414986133575d, -1.0571674860370546E-9d}, new double[]{0.07159365713596344d, -3.948954622015801E-9d}, new double[]{0.07250232994556427d, 1.1776625988228244E-9d}, new double[]{0.07341018319129944d, 9.221072639606492E-10d}, new double[]{0.07431721687316895d, -3.219119568928366E-9d}, new double[]{0.0752234160900116d, 5.147575929018918E-9d}, new double[]{0.07612881064414978d, -2.291749683541979E-9d}, new doubleLine truncated
     new double[]{0.6813591718673706d, 5.294053246347931E-8d}, new double[]{0.681853175163269d, -1.2220826223585654E-9d}, new double[]{0.6823468208312988d, 5.8377876767612725E-8d}, new double[]{0.6828403472900391d, -6.437492120743254E-9d}, new double[]{0.6833335161209106d, 4.2990710043633113E-8d}, new double[]{0.6838265657424927d, -3.1516131027023284E-8d}, new double[]{0.684319257736206d, 8.70017386744679E-9d}, new double[]{0.6848117113113403d, 4.466959125843237E-8d}, new double[]{0.6853040456771851d, -4.25782656420497E-8d}, new double[]{0.6857960224151611d, -1.4386267593671393E-8d}, new double[]{0.6862877607345581d, 1.0274494061148778E-8d}, new double[]{0.686779260635376d, 3.164186629229597E-8d}, new double[]{0.6872705221176147d, 4.995334552140326E-8d}, new double[]{0.687761664390564d, -5.3763211240398744E-8d}, new double[]{0.6882524490356445d, -4.0852427502515625E-8d}, new double[]{0.688742995262146d, -3.0287143914420064E-8d}, new double[]{0.6892333030700684d, -2.183125937905008E-8d}, new double[]{0.6897233724594116d, -1.524901992178814E-8d}, new double[]{0.6902132034301758d, -1.0305018010328949E-8d}, new double[]{0.6907027959823608d, -6.764191876212205E-9d}, new double[]{0.6911921501159668d, -4.391824838015402E-9d}, new double[]{0.6916812658309937d, -2.9535446262017846E-9d}, new double[]{0.6921701431274414d, -2.2153227096187463E-9d}, new double[]{0.6926587820053101d, -1.943473623641502E-9d}};
 }

feature/mutual/src/main/java/com/rtbishop/look4sat/feature/mutual/ElevationCurveChart.kt

@@ -24,7 +24,6 @@ import androidx.compose.foundation.gestures.detectTapGestures
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
-import androidx.compose.ui.res.stringResource
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
@@ -41,7 +40,6 @@ import androidx.compose.ui.graphics.nativeCanvas
 import androidx.compose.ui.input.pointer.pointerInput
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
-import com.rtbishop.look4sat.core.presentation.R
 import java.text.SimpleDateFormat
 import java.util.Date
 import java.util.Locale
@@ -228,8 +226,8 @@ fun ElevationCurveChart(
             modifier = Modifier.fillMaxWidth().padding(horizontal = 8.dp, vertical = 4.dp),
             horizontalArrangement = Arrangement.SpaceEvenly
         ) {
-            Text(stringResource(R.string.mutual_station_a), color = colorA, fontSize = 12.sp)
-            Text(stringResource(R.string.mutual_station_b), color = colorB, fontSize = 12.sp)
+            Text("● 站点A", color = colorA, fontSize = 12.sp)
+            Text("● 站点B", color = colorB, fontSize = 12.sp)
         }
     }
 }

feature/mutual/src/main/java/com/rtbishop/look4sat/feature/mutual/MutualRadarView.kt

@@ -57,8 +57,8 @@ private const val STROKE_WIDTH = 2.5f
 fun MutualRadarView(
     trackSamples: List<TrackSample>,
     progress: Float = 0.5f,
-    labelA: String = "Station A",
-    labelB: String = "Station B",
+    labelA: String = "站点A",
+    labelB: String = "站点B",
     modifier: Modifier = Modifier
 ) {
     if (trackSamples.isEmpty()) return

feature/mutual/src/main/java/com/rtbishop/look4sat/feature/mutual/MutualScreen.kt

@@ -44,7 +44,6 @@ import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Slider
-import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.collectAsState
@@ -58,7 +57,6 @@ import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.input.KeyboardType
-import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import com.rtbishop.look4sat.core.domain.repository.MutualPassData
@@ -90,35 +88,28 @@ fun MutualScreen(
                 },
                 topInfo = {
                     Text(
-                        text = stringResource(R.string.mutual_title),
+                        text = "过境匹配",
                         style = MaterialTheme.typography.titleMedium,
                         fontWeight = FontWeight.Bold
                     )
                 },
                 bottomInfo = {
-                    Text(
-                        text = mutualStatusText(state),
-                        style = MaterialTheme.typography.bodySmall,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant,
-                        maxLines = 1,
-                        overflow = TextOverflow.Ellipsis,
-                        modifier = Modifier.weight(1f)
-                    )
+                    if (state.mutualPasses.isNotEmpty()) {
+                        Text(
+                            text = "找到 ${state.mutualPasses.size} 个匹配",
+                            style = MaterialTheme.typography.bodySmall,
+                            color = MaterialTheme.colorScheme.onSurfaceVariant
+                        )
+                    }
                 },
                 endAction = {
-                    Row(
-                        verticalAlignment = Alignment.CenterVertically,
-                        horizontalArrangement = Arrangement.spacedBy(6.dp)
-                    ) {
-                        if (state.isCalculating) {
-                            CircularProgressIndicator(
-                                modifier = Modifier
-                                    .height(24.dp)
-                                    .width(24.dp),
-                                strokeWidth = 2.dp
-                            )
-                        }
-                        MutualStatusChip(state)
+                    if (state.isCalculating) {
+                        CircularProgressIndicator(
+                            modifier = Modifier
+                                .height(24.dp)
+                                .width(24.dp),
+                            strokeWidth = 2.dp
+                        )
                     }
                 }
             )
@@ -196,9 +187,11 @@ private fun MutualContent(
                 modifier = Modifier.fillMaxWidth(),
                 verticalArrangement = Arrangement.spacedBy(6.dp)
             ) {
+                MatchIntroCard()
+
                 if (isVertical) {
                     StationInputCard(
-                        title = stringResource(R.string.mutual_station_you),
+                        title = "你的位置",
                         titleColor = MaterialTheme.colorScheme.primary,
                         lat = state.stationALat,
                         lon = state.stationALon,
@@ -214,7 +207,7 @@ private fun MutualContent(
                         currentPositionAction = onUseCurrentPosition
                     )
                     StationInputCard(
-                        title = stringResource(R.string.mutual_station_opposite),
+                        title = "友台位置",
                         titleColor = MaterialTheme.colorScheme.tertiary,
                         lat = state.stationBLat,
                         lon = state.stationBLon,
@@ -234,7 +227,7 @@ private fun MutualContent(
                         horizontalArrangement = Arrangement.spacedBy(6.dp)
                     ) {
                         StationInputCard(
-                            title = stringResource(R.string.mutual_station_you),
+                            title = "你的位置",
                             titleColor = MaterialTheme.colorScheme.primary,
                             lat = state.stationALat,
                             lon = state.stationALon,
@@ -251,7 +244,7 @@ private fun MutualContent(
                             modifier = Modifier.weight(1f)
                         )
                         StationInputCard(
-                            title = stringResource(R.string.mutual_station_opposite),
+                            title = "友台位置",
                             titleColor = MaterialTheme.colorScheme.tertiary,
                             lat = state.stationBLat,
                             lon = state.stationBLon,
@@ -294,8 +287,8 @@ private fun MutualContent(
                 startTime = pass.startTime,
                 endTime = pass.endTime,
                 maxElev = maxOf(pass.maxElevationA, pass.maxElevationB, 10.0),
-                labelA = stringResource(R.string.mutual_label_you),
-                labelB = stringResource(R.string.mutual_label_opposite)
+                labelA = "你",
+                labelB = "友台"
             )
             MutualPassCard(
                 pass = pass,
@@ -311,52 +304,25 @@ private fun MutualContent(
 }
 
 @Composable
-private fun MutualStatusChip(state: MutualUiState) {
-    val colorScheme = MaterialTheme.colorScheme
-    val containerColor = when {
-        state.isCalculating -> colorScheme.primaryContainer
-        state.errorMessage != null -> colorScheme.errorContainer
-        state.mutualPasses.isNotEmpty() -> colorScheme.primary
-        state.hasSearched -> colorScheme.surfaceVariant
-        else -> colorScheme.surfaceVariant
+private fun MatchIntroCard(modifier: Modifier = Modifier) {
+    ElevatedCard(modifier = modifier.fillMaxWidth()) {
+        Column(
+            modifier = Modifier.padding(12.dp),
+            verticalArrangement = Arrangement.spacedBy(4.dp)
+        ) {
+            Text(
+                text = "位置匹配",
+                style = MaterialTheme.typography.titleSmall,
+                fontWeight = FontWeight.Medium,
+                color = MaterialTheme.colorScheme.primary
+            )
+            Text(
+                text = "输入双方位置，查找共同可见的卫星过境窗口",
+                style = MaterialTheme.typography.bodySmall,
+                color = MaterialTheme.colorScheme.onSurfaceVariant
+            )
+        }
     }
-    val contentColor = when {
-        state.isCalculating -> colorScheme.onPrimaryContainer
-        state.errorMessage != null -> colorScheme.onErrorContainer
-        state.mutualPasses.isNotEmpty() -> colorScheme.onPrimary
-        else -> colorScheme.onSurfaceVariant
-    }
-    Surface(
-        color = containerColor,
-        contentColor = contentColor,
-        shape = MaterialTheme.shapes.small
-    ) {
-        Text(
-            text = mutualStatusChipText(state),
-            style = MaterialTheme.typography.labelSmall,
-            fontWeight = FontWeight.Medium,
-            maxLines = 1,
-            modifier = Modifier.padding(horizontal = 10.dp, vertical = 4.dp)
-        )
-    }
-}
-
-@Composable
-private fun mutualStatusText(state: MutualUiState): String = when {
-    state.isCalculating -> stringResource(R.string.mutual_status_calculating)
-    state.errorMessage != null -> stringResource(R.string.mutual_status_error)
-    state.mutualPasses.isNotEmpty() -> stringResource(R.string.mutual_status_matches, state.mutualPasses.size)
-    state.hasSearched -> stringResource(R.string.mutual_status_none)
-    else -> stringResource(R.string.mutual_status_idle)
-}
-
-@Composable
-private fun mutualStatusChipText(state: MutualUiState): String = when {
-    state.isCalculating -> stringResource(R.string.mutual_chip_calculating)
-    state.errorMessage != null -> stringResource(R.string.mutual_chip_error)
-    state.mutualPasses.isNotEmpty() -> stringResource(R.string.mutual_chip_matches, state.mutualPasses.size)
-    state.hasSearched -> stringResource(R.string.mutual_chip_none)
-    else -> stringResource(R.string.mutual_chip_idle)
 }
 
 @Composable
@@ -395,7 +361,7 @@ private fun StationInputCard(
                 )
                 if (currentPositionAction != null) {
                     OutlinedButton(onClick = currentPositionAction) {
-                        Text(stringResource(R.string.mutual_use_current), style = MaterialTheme.typography.bodySmall)
+                        Text("填入当前位置", style = MaterialTheme.typography.bodySmall)
                     }
                 }
             }
@@ -407,7 +373,7 @@ private fun StationInputCard(
                 OutlinedTextField(
                     value = lat,
                     onValueChange = onLatChange,
-                    label = { Text(stringResource(R.string.mutual_lat)) },
+                    label = { Text("纬度") },
                     placeholder = { Text(latPlaceholder) },
                     keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Decimal),
                     singleLine = true,
@@ -416,7 +382,7 @@ private fun StationInputCard(
                 OutlinedTextField(
                     value = lon,
                     onValueChange = onLonChange,
-                    label = { Text(stringResource(R.string.mutual_lon)) },
+                    label = { Text("经度") },
                     placeholder = { Text(lonPlaceholder) },
                     keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Decimal),
                     singleLine = true,
@@ -427,15 +393,15 @@ private fun StationInputCard(
             OutlinedTextField(
                 value = grid,
                 onValueChange = onGridChange,
-                label = { Text(stringResource(R.string.mutual_grid)) },
+                label = { Text("网格") },
                 placeholder = { Text(gridPlaceholder) },
-                supportingText = { Text(stringResource(R.string.mutual_grid_hint)) },
+                supportingText = { Text("支持 4/6/8 位 Maidenhead 网格；也可直接输入经纬度") },
                 singleLine = true,
                 modifier = Modifier.fillMaxWidth()
             )
 
             Text(
-                text = stringResource(R.string.mutual_min_elevation, minElev.toInt()),
+                text = "最小仰角：${minElev.toInt()}°",
                 style = MaterialTheme.typography.bodySmall,
                 color = MaterialTheme.colorScheme.onSurfaceVariant
             )
@@ -463,7 +429,7 @@ private fun MatchSearchCard(
             verticalArrangement = Arrangement.spacedBy(10.dp)
         ) {
             Text(
-                text = stringResource(R.string.mutual_time_range),
+                text = "时间范围",
                 style = MaterialTheme.typography.titleSmall,
                 fontWeight = FontWeight.Medium
             )
@@ -494,7 +460,7 @@ private fun MatchSearchCard(
                     )
                     Spacer(Modifier.width(8.dp))
                 }
-                Text(if (isCalculating) stringResource(R.string.mutual_calculating) else stringResource(R.string.mutual_query))
+                Text(if (isCalculating) "计算中..." else "查询匹配")
             }
         }
     }
@@ -560,12 +526,12 @@ private fun MutualPassCard(
                 horizontalArrangement = Arrangement.SpaceBetween
             ) {
                 Text(
-                    text = stringResource(R.string.mutual_elevation_you, pass.maxElevationA.toInt()),
+                    text = "你: ${pass.maxElevationA}°",
                     style = MaterialTheme.typography.bodySmall,
                     color = MaterialTheme.colorScheme.primary
                 )
                 Text(
-                    text = stringResource(R.string.mutual_elevation_opposite, pass.maxElevationB.toInt()),
+                    text = "友台: ${pass.maxElevationB}°",
                     style = MaterialTheme.typography.bodySmall,
                     color = MaterialTheme.colorScheme.tertiary
                 )
@@ -581,7 +547,7 @@ private fun MutualPassCard(
                     // Dual-station radar track (polar plot)
                     if (visibleTracks.isNotEmpty()) {
                         Text(
-                            text = stringResource(R.string.mutual_both_tracks),
+                            text = "双方轨迹",
                             style = MaterialTheme.typography.titleSmall,
                             fontWeight = FontWeight.Medium,
                             color = MaterialTheme.colorScheme.onSurfaceVariant
@@ -589,8 +555,8 @@ private fun MutualPassCard(
                         MutualRadarView(
                             trackSamples = visibleTracks,
                             progress = dragProgress,
-                            labelA = stringResource(R.string.mutual_label_you),
-                            labelB = stringResource(R.string.mutual_label_opposite)
+                            labelA = "你",
+                            labelB = "友台"
                         )
                         Spacer(Modifier.height(8.dp))
                     }
@@ -615,7 +581,7 @@ private fun MutualPassCard(
                             modifier = Modifier.height(16.dp).width(16.dp)
                         )
                         Spacer(Modifier.width(6.dp))
-                        Text(stringResource(R.string.mutual_open_radar))
+                        Text("查看雷达")
                     }
                 }
             }

feature/mutual/src/main/java/com/rtbishop/look4sat/feature/mutual/MutualViewModel.kt

@@ -49,7 +49,6 @@ data class MutualUiState(
     val hoursAhead: Int = 24,
     val mutualPasses: List<MutualPass> = emptyList(),
     val isCalculating: Boolean = false,
-    val hasSearched: Boolean = false,
     val selectedPassIndex: Int = -1,
     val errorMessage: String? = null
 )
@@ -158,25 +157,17 @@ class MutualViewModel(
         var posB = resolvePosition(state.stationBLat, state.stationBLon, state.stationBGrid)
 
         if (posA == null || posB == null) {
-            _uiState.update { it.copy(errorMessage = "Please enter valid coordinates or a Maidenhead grid (4/6/8 chars)") }
+            _uiState.update { it.copy(errorMessage = "请输入有效的位置坐标或网格（4/6/8位）") }
             return
         }
 
         val satellites = satelliteRepo.satellites.value
         if (satellites.isEmpty()) {
-            _uiState.update { it.copy(errorMessage = "No satellite data. Select satellites from the list first.") }
+            _uiState.update { it.copy(errorMessage = "没有卫星数据，请先在卫星列表中选择卫星") }
             return
         }
 
-        _uiState.update {
-            it.copy(
-                isCalculating = true,
-                hasSearched = true,
-                errorMessage = null,
-                mutualPasses = emptyList(),
-                selectedPassIndex = -1
-            )
-        }
+        _uiState.update { it.copy(isCalculating = true, errorMessage = null, mutualPasses = emptyList()) }
 
         viewModelScope.launch {
             val time = System.currentTimeMillis()
@@ -193,9 +184,9 @@ class MutualViewModel(
                 val passCount = satelliteRepo.passes.value.size
                 val satCount = satellites.size
                 when {
-                    passCount == 0 -> "Pass list is empty. Select satellites from the list first."
-                    satCount == 0 -> "No satellites selected."
-                    else -> "No mutual passes found (${passCount} passes, ${satCount} satellites)."
+                    passCount == 0 -> "过境列表为空，请先在卫星列表中选择卫星"
+                    satCount == 0 -> "没有已选中的卫星"
+                    else -> "未找到共同过境（${passCount}个过境，${satCount}颗卫星）"
                 }
             } else null
 

feature/passes/src/main/java/com/rtbishop/look4sat/feature/passes/PassesViewModel.kt

@@ -38,7 +38,6 @@ import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.isActive
 import kotlinx.coroutines.launch
 import java.text.SimpleDateFormat
-import java.util.Calendar
 import java.util.Date
 import java.util.Locale
 import java.util.TimeZone
@@ -163,10 +162,7 @@ class PassesViewModel(
         return SimpleDateFormat(pattern, Locale.getDefault()).also { it.timeZone = tz }
     }
 
-    // Computes sunrise/sunset strings for each unique calendar day in the pass list, plus today for DeepSpace.
-    // CelestialComputer.findSunRiseSet() returns the next rise/set after the supplied time, so pass
-    // the calendar day's 00:00 in the same timezone used by the visible date group. Passing a pass's
-    // AOS time can jump to the following day's sunrise/sunset when that AOS is after the local event.
+    // Computes sunrise/sunset strings for each unique calendar day in the pass list, plus today for DeepSpace
     private fun computeSunTimes(passes: List<OrbitalPass>, isUtc: Boolean): Map<String, Pair<String, String>> {
         val stationPos = settingsRepo.stationPosition.value
         val tz = if (isUtc) TimeZone.getTimeZone("UTC") else TimeZone.getDefault()
@@ -175,7 +171,7 @@ class PassesViewModel(
         val result = LinkedHashMap<String, Pair<String, String>>()
         // DeepSpace group always shows today's sun times
         if (passes.any { it.isDeepSpace }) {
-            val riseSet = CelestialComputer.findSunRiseSet(stationPos, startOfDayMillis(System.currentTimeMillis(), tz))
+            val riseSet = CelestialComputer.findSunRiseSet(stationPos, System.currentTimeMillis())
             val rise = if (riseSet.riseTimeMillis > 0) sdfTime.format(Date(riseSet.riseTimeMillis)) else "--:--"
             val set = if (riseSet.setTimeMillis > 0) sdfTime.format(Date(riseSet.setTimeMillis)) else "--:--"
             result["DeepSpace (period >225min)"] = rise to set
@@ -184,7 +180,7 @@ class PassesViewModel(
             if (pass.isDeepSpace) continue
             val label = sdfDate.format(Date(pass.aosTime))
             if (label in result) continue
-            val riseSet = CelestialComputer.findSunRiseSet(stationPos, startOfDayMillis(pass.aosTime, tz))
+            val riseSet = CelestialComputer.findSunRiseSet(stationPos, pass.aosTime)
             val rise = if (riseSet.riseTimeMillis > 0) sdfTime.format(Date(riseSet.riseTimeMillis)) else "--:--"
             val set = if (riseSet.setTimeMillis > 0) sdfTime.format(Date(riseSet.setTimeMillis)) else "--:--"
             result[label] = rise to set
@@ -192,16 +188,6 @@ class PassesViewModel(
         return result
     }
 
-    private fun startOfDayMillis(timeMillis: Long, tz: TimeZone): Long {
-        return Calendar.getInstance(tz, Locale.getDefault()).apply {
-            timeInMillis = timeMillis
-            set(Calendar.HOUR_OF_DAY, 0)
-            set(Calendar.MINUTE, 0)
-            set(Calendar.SECOND, 0)
-            set(Calendar.MILLISECOND, 0)
-        }.timeInMillis
-    }
-
     private fun groupPasses(passes: List<OrbitalPass>, isUtc: Boolean): Map<String, List<OrbitalPass>> {
         val tz = if (isUtc) TimeZone.getTimeZone("UTC") else TimeZone.getDefault()
         val sdfDate = dateFormat(tz)

feature/radar/build.gradle.kts

@@ -8,6 +8,8 @@ android {
 
 dependencies {
     implementation(project(":feature:mutual"))
+    // CW 解码面板: 复用 feature:cw 的 Morse Expert 引擎(布局 cw_panel_main + MainActivity 控制器)
     implementation(project(":feature:cw"))
+    // 与 feature:cw 一致(控制器按 ID 递归查找 ConstraintLayout 视图)
     implementation("androidx.constraintlayout:constraintlayout:2.2.1")
 }

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/RadarScreen.kt

@@ -61,7 +61,6 @@ import androidx.lifecycle.viewmodel.compose.viewModel
 import com.rtbishop.look4sat.core.domain.predict.OrbitalPos
 import com.rtbishop.look4sat.core.domain.repository.IContainerProvider
 import com.rtbishop.look4sat.core.domain.repository.MutualPassData
-import com.rtbishop.look4sat.core.domain.utility.DopplerFrequencyCalculator
 import com.rtbishop.look4sat.core.domain.utility.toDegrees
 import com.rtbishop.look4sat.core.presentation.EmptyListCard
 import com.rtbishop.look4sat.core.presentation.IconCard
@@ -79,7 +78,6 @@ import kotlin.math.PI
 
 private enum class RadarPage(val title: String) {
     Transceivers("Transceivers"),
-    Calculator("Calculator"),
     Sstv("SSTV")
 }
 
@@ -203,31 +201,16 @@ private fun PagerCard(
     requestMicPermission: () -> Unit,
     modifier: Modifier = Modifier
 ) {
-    val hasCalculatorPage = remember(uiState.transceivers.transmitters) {
-        uiState.transceivers.transmitters.any(DopplerFrequencyCalculator::isNamedLinearTransponder)
-    }
-    val pages = remember(hasCalculatorPage) {
-        buildList {
-            add(RadarPage.Transceivers)
-            if (hasCalculatorPage) add(RadarPage.Calculator)
-            add(RadarPage.Sstv)
-        }
-    }
+    val pages = RadarPage.entries
     val pagerState = rememberPagerState(pageCount = { pages.size })
     val coroutineScope = rememberCoroutineScope()
 
-    LaunchedEffect(pages.size) {
-        val lastPage = pages.lastIndex
-        if (pagerState.currentPage > lastPage) pagerState.scrollToPage(lastPage)
-    }
-
     ElevatedCard(modifier = modifier) {
         Column(modifier = Modifier.fillMaxSize()) {
-            val selectedTabIndex = pagerState.currentPage.coerceIn(0, pages.lastIndex)
-            PrimaryTabRow(selectedTabIndex = selectedTabIndex) {
+            PrimaryTabRow(selectedTabIndex = pagerState.currentPage) {
                 pages.forEachIndexed { index, page ->
                     Tab(
-                        selected = selectedTabIndex == index,
+                        selected = pagerState.currentPage == index,
                         onClick = { coroutineScope.launch { pagerState.animateScrollToPage(index) } },
                         text = { Text(text = page.title, maxLines = 1, overflow = TextOverflow.Ellipsis) }
                     )
@@ -239,19 +222,14 @@ private fun PagerCard(
             ) { pageIndex ->
                 when (pages[pageIndex]) {
                     RadarPage.Transceivers -> TransceiversPage(
-                        transceivers = uiState.transceivers.transmitters,
-                        selectedUuid = uiState.transceivers.selectedUuid,
-                        radioControl = uiState.radioControl,
-                        onAction = onAction
-                    )
-                    RadarPage.Calculator -> CalculatorPage(
-                        transceivers = uiState.transceivers.transmitters,
-                        selectedUuid = uiState.transceivers.selectedUuid,
-                        orbitalPos = uiState.orbitalPos,
-                        cw = uiState.cw,
-                        onAction = onAction,
-                        requestMicPermission = requestMicPermission
-                    )
+                                    transceivers = uiState.transceivers.transmitters,
+                                    selectedUuid = uiState.transceivers.selectedUuid,
+                                    orbitalPos = uiState.orbitalPos,
+                                    cw = uiState.cw,
+                                    radioControl = uiState.radioControl,
+                                    onAction = onAction,
+                                    requestMicPermission = requestMicPermission
+                                )
                     RadarPage.Sstv -> SstvPage(
                         sstv = uiState.sstv,
                         dopplerFrequency = uiState.transceivers.selectedFrequency?.let { formatFrequency(it) },

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/RadarView.kt

@@ -94,14 +94,21 @@ fun RadarViewCompose(
         animationSpec = infiniteRepeatable(tween(1000)),
         label = "animScale"
     )
-    // Drive the sweep from the animation framework to eliminate state mutation inside the draw block
-    val sweepTransition = rememberInfiniteTransition(label = "sweep")
-    val sweepDegrees by sweepTransition.animateFloat(
-        initialValue = 0f,
-        targetValue = 360f,
-        animationSpec = infiniteRepeatable(tween(SWEEP_DURATION_MS, easing = LinearEasing)),
-        label = "sweepDegrees"
-    )
+    // Drive the sweep from the animation framework to eliminate state mutation inside the draw block.
+    // Only create the infinite transition when the sweep is enabled — otherwise the canvas would
+    // be invalidated every frame for an effect that isn't visible, wasting GPU and battery.
+    val sweepDegrees = if (shouldShowSweep) {
+        val sweepTransition = rememberInfiniteTransition(label = "sweep")
+        val animatedSweep by sweepTransition.animateFloat(
+            initialValue = 0f,
+            targetValue = 360f,
+            animationSpec = infiniteRepeatable(tween(SWEEP_DURATION_MS, easing = LinearEasing)),
+            label = "sweepDegrees"
+        )
+        animatedSweep
+    } else {
+        0f
+    }
     val measurer = rememberTextMeasurer()
     val sunPainter = painterResource(R.drawable.ic_sun)
     val moonPainter = painterResource(R.drawable.ic_moon)

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/RadarViewModel.kt

@@ -181,7 +181,7 @@ class RadarViewModel(
                 orbitalPos = pos, sunPosition = cachedSunPos, moonPosition = cachedMoonPos
             )
         }
-        processRadios(allRadios, pass.orbitalObject, timeNow)
+        processRadios(allRadios, pos)
         sendPassData(pos)
     }
 
@@ -342,8 +342,8 @@ class RadarViewModel(
         }
     }
 
-    private suspend fun processRadios(radios: List<SatRadio>, orbitalObject: OrbitalObject, time: Long) {
-        val transmitters = satelliteRepo.getRadios(orbitalObject, stationPos, radios, time)
+    private suspend fun processRadios(radios: List<SatRadio>, satPos: OrbitalPos) {
+        val transmitters = satelliteRepo.getRadios(satPos, radios)
         _uiState.update { state ->
             val freq = if (state.transceivers.selectedUuid != null) {
                 val selectedRadio = transmitters.firstOrNull { it.uuid == state.transceivers.selectedUuid }

feature/radar/src/main/java/com/rtbishop/look4sat/feature/radar/TransceiversPage.kt

@@ -23,18 +23,14 @@ import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.animation.expandVertically
 import androidx.compose.animation.shrinkVertically
 import androidx.compose.foundation.background
-import androidx.compose.foundation.border
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.interaction.MutableInteractionSource
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
-import androidx.compose.foundation.text.BasicTextField
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.FlowRow
-import androidx.compose.foundation.layout.IntrinsicSize
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.fillMaxHeight
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
@@ -45,39 +41,31 @@ import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.foundation.lazy.rememberLazyListState
 import androidx.compose.foundation.shape.CircleShape
-import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.text.KeyboardOptions
 import androidx.compose.material3.Button
+import androidx.compose.material3.ElevatedCard
 import androidx.compose.material3.FilterChip
 import androidx.compose.material3.HorizontalDivider
 import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.OutlinedButton
 import androidx.compose.material3.OutlinedTextField
-import androidx.compose.material3.Slider
 import androidx.compose.material3.Text
-import androidx.compose.material3.TextButton
-import androidx.compose.material3.ElevatedCard
-import androidx.compose.material3.CardDefaults
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableIntStateOf
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
-import androidx.compose.ui.draw.drawBehind
 import androidx.compose.ui.draw.rotate
-import androidx.compose.ui.geometry.Offset
 import androidx.compose.ui.graphics.Color
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.text.TextStyle
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.input.KeyboardType
 import androidx.compose.ui.text.style.TextAlign
@@ -89,7 +77,6 @@ import androidx.constraintlayout.widget.ConstraintLayout
 import com.rtbishop.look4sat.core.domain.model.SatRadio
 import com.rtbishop.look4sat.core.domain.predict.OrbitalPos
 import com.rtbishop.look4sat.core.domain.utility.DopplerFrequencyCalculator
-import com.rtbishop.look4sat.core.domain.utility.TransponderMapper
 import com.rtbishop.look4sat.core.presentation.CardButton
 import com.rtbishop.look4sat.core.presentation.R
 import com.rtbishop.look4sat.core.presentation.formatFrequency
@@ -103,8 +90,11 @@ import kotlin.time.Duration.Companion.milliseconds
 fun TransceiversPage(
     transceivers: List<SatRadio>,
     selectedUuid: String?,
+    orbitalPos: OrbitalPos?,
+    cw: CwSubState,
     radioControl: RadioControlSubState,
     onAction: (RadarAction) -> Unit,
+    requestMicPermission: () -> Unit = {},
     modifier: Modifier = Modifier
 ) {
     if (transceivers.isEmpty()) {
@@ -127,8 +117,11 @@ fun TransceiversPage(
                 TransceiverItem(
                     radio = radio,
                     isExpanded = isExpanded,
+                    orbitalPos = orbitalPos,
+                    cw = cw,
                     radioControl = radioControl,
                     onAction = onAction,
+                    requestMicPermission = requestMicPermission,
                     onToggle = { onAction(RadarAction.SelectTransmitter(radio.uuid)) }
                 )
             }
@@ -136,85 +129,6 @@ fun TransceiversPage(
     }
 }
 
-@Composable
-fun CalculatorPage(
-    transceivers: List<SatRadio>,
-    selectedUuid: String?,
-    orbitalPos: OrbitalPos?,
-    cw: CwSubState,
-    onAction: (RadarAction) -> Unit,
-    requestMicPermission: () -> Unit = {},
-    modifier: Modifier = Modifier
-) {
-    val calculatorTransceivers = remember(transceivers) {
-        transceivers.filter(DopplerFrequencyCalculator::isNamedLinearTransponder)
-    }
-    val selectedTransceiver = remember(calculatorTransceivers, selectedUuid) {
-        calculatorTransceivers.firstOrNull { it.uuid == selectedUuid }
-            ?: calculatorTransceivers.firstOrNull()
-    }
-
-    if (selectedTransceiver == null) {
-        EmptyTransceiversContent(modifier)
-        return
-    }
-
-    LazyColumn(
-        modifier = modifier.fillMaxSize(),
-        verticalArrangement = Arrangement.spacedBy(10.dp)
-    ) {
-        if (calculatorTransceivers.size > 1) {
-            item {
-                FlowRow(
-                    horizontalArrangement = Arrangement.spacedBy(6.dp),
-                    verticalArrangement = Arrangement.spacedBy(4.dp),
-                    modifier = Modifier.fillMaxWidth()
-                ) {
-                    calculatorTransceivers.forEach { radio ->
-                        FilterChip(
-                            selected = radio.uuid == selectedTransceiver.uuid,
-                            onClick = {
-                                if (radio.uuid != selectedUuid) onAction(RadarAction.SelectTransmitter(radio.uuid))
-                            },
-                            label = {
-                                Text(
-                                    text = transceiverTitle(radio),
-                                    maxLines = 1,
-                                    overflow = TextOverflow.Ellipsis
-                                )
-                            }
-                        )
-                    }
-                }
-            }
-        }
-
-        item {
-            DopplerFrequencyCalculator(
-                transponder = selectedTransceiver,
-                orbitalPos = orbitalPos,
-                modifier = Modifier.fillMaxWidth()
-            )
-        }
-
-        item {
-            HorizontalDivider(
-                thickness = 1.dp,
-                color = MaterialTheme.colorScheme.outline.copy(alpha = 0.3f)
-            )
-        }
-
-        item {
-            CwDecoderPanel(
-                cw = cw,
-                onAction = onAction,
-                requestMicPermission = requestMicPermission,
-                modifier = Modifier.fillMaxWidth()
-            )
-        }
-    }
-}
-
 @Composable
 private fun EmptyTransceiversContent(modifier: Modifier = Modifier) {
     Box(contentAlignment = Alignment.Center, modifier = modifier.fillMaxSize()) {
@@ -242,8 +156,11 @@ private fun EmptyTransceiversContent(modifier: Modifier = Modifier) {
 private fun TransceiverItem(
     radio: SatRadio,
     isExpanded: Boolean,
+    orbitalPos: OrbitalPos?,
+    cw: CwSubState,
     radioControl: RadioControlSubState,
     onAction: (RadarAction) -> Unit,
+    requestMicPermission: () -> Unit,
     onToggle: () -> Unit
 ) {
     val bgColor = if (isExpanded) MaterialTheme.colorScheme.surfaceContainerHighest
@@ -284,8 +201,11 @@ private fun TransceiverItem(
                     )
                 }
                 // Title with mode
+                val title = if (radio.isInverted) "INV: ${radio.info}" else radio.info
+                val mode = "${radio.downlinkMode ?: "--"}/${radio.uplinkMode ?: "--"}"
+                val fullTitle = "$title ($mode)"
                 Text(
-                    text = transceiverTitle(radio),
+                    text = fullTitle,
                     textAlign = TextAlign.Center,
                     color = MaterialTheme.colorScheme.onSurface,
                     maxLines = 1,
@@ -333,8 +253,11 @@ private fun TransceiverItem(
         ) {
             ExpandedRadioControl(
                 radio = radio,
+                orbitalPos = orbitalPos,
+                cw = cw,
                 radioControl = radioControl,
-                onAction = onAction
+                onAction = onAction,
+                requestMicPermission = requestMicPermission
             )
         }
 
@@ -403,8 +326,11 @@ private fun UnifiedFrequencyRow(
 @Composable
 private fun ExpandedRadioControl(
     radio: SatRadio,
+    orbitalPos: OrbitalPos?,
+    cw: CwSubState,
     radioControl: RadioControlSubState,
     onAction: (RadarAction) -> Unit,
+    requestMicPermission: () -> Unit = {},
 ) {
     Column(
         modifier = Modifier
@@ -513,6 +439,23 @@ private fun ExpandedRadioControl(
             }
         }
 
+        // Doppler frequency calculator (linear transponders only)
+        DopplerFrequencyCalculator(
+            transponder = radio,
+            orbitalPos = orbitalPos,
+            modifier = Modifier.fillMaxWidth()
+        )
+
+        // CW decoder panel (linear transponders only)
+        if (DopplerFrequencyCalculator.isLinearTransponder(radio)) {
+            CwDecoderPanel(
+                cw = cw,
+                onAction = onAction,
+                requestMicPermission = requestMicPermission,
+                modifier = Modifier.fillMaxWidth()
+            )
+        }
+
         // Control buttons
         Row(horizontalArrangement = Arrangement.spacedBy(4.dp)) {
             if (!radioControl.txPanel.isConnected && !radioControl.rxPanel.isConnected) {
@@ -544,8 +487,6 @@ private fun ExpandedRadioControl(
     }
 }
 
-private enum class EditedField { TX, PASSBAND, RX }
-
 @Composable
 private fun DopplerFrequencyCalculator(
     transponder: SatRadio,
@@ -554,351 +495,144 @@ private fun DopplerFrequencyCalculator(
 ) {
     if (orbitalPos == null || !DopplerFrequencyCalculator.isLinearTransponder(transponder)) return
 
-    var lastEditedField by remember { mutableStateOf(EditedField.TX) }
-    var txFrequencyHz by remember { mutableStateOf(0L) }
-    var rxFrequencyHz by remember { mutableStateOf(0L) }
-    var passbandPosition by remember { mutableStateOf(0.5f) }
+    var txInputMHz by remember { mutableStateOf("") }
+    var rxInputMHz by remember { mutableStateOf("") }
     var offsetKHz by remember { mutableStateOf("") }
-    var stepSizeKHz by remember { mutableIntStateOf(1) }
+    var lastEditedBy by remember { mutableStateOf(EditedField.TX) }
 
     val offsetHz = offsetKHz.toDoubleOrNull()?.let { it * 1000 }?.toLong() ?: 0L
 
-    val txLow = transponder.uplinkLow ?: return
-    val txHigh = transponder.uplinkHigh ?: return
-    val rxLow = transponder.downlinkLow ?: return
-    val rxHigh = transponder.downlinkHigh ?: return
-    val txRange = txHigh - txLow
-    val rxRange = rxHigh - rxLow
-    if (txRange <= 0L || rxRange <= 0L) return
-
-    // 原始转发器值（逆转多普勒），用于 passband 映射计算
-    val rawTxLow = orbitalPos.getDownlinkFreq(txLow)
-    val rawTxHigh = orbitalPos.getDownlinkFreq(txHigh)
-    val rawRxLow = orbitalPos.getUplinkFreq(rxLow)
-    val rawRxHigh = orbitalPos.getUplinkFreq(rxHigh)
-    val rawTxRange = rawTxHigh - rawTxLow
-    val rawRxRange = rawRxHigh - rawRxLow
-    val rawTransponder = transponder.copy(
-        uplinkLow = rawTxLow, uplinkHigh = rawTxHigh,
-        downlinkLow = rawRxLow, downlinkHigh = rawRxHigh
-    )
-
-    // 初始化
-    LaunchedEffect(Unit) {
-        if (txFrequencyHz == 0L) {
-            txFrequencyHz = txLow + txRange / 2
-            rxFrequencyHz = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
-                txFrequencyHz, rawTransponder, orbitalPos, offsetHz
-            ) ?: (rxLow + rxRange / 2)
-        }
-    }
-
-    // 实时重算：卫星移动时，锚点侧不变，重算另一侧
+    // Real-time refresh: when orbitalPos changes (1Hz), recompute the opposite field
     LaunchedEffect(orbitalPos) {
-        if (lastEditedField == EditedField.TX) {
-            // TX 是锚点，不变；重算 RX
-            rxFrequencyHz = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
-                txFrequencyHz, rawTransponder, orbitalPos, offsetHz
-            ) ?: rxFrequencyHz
-        } else if (lastEditedField == EditedField.RX) {
-            // RX 是锚点，不变；重算 TX
-            txFrequencyHz = DopplerFrequencyCalculator.computeUplinkFromDownlinkWithOffset(
-                rxFrequencyHz, rawTransponder, orbitalPos, offsetHz
-            ) ?: txFrequencyHz
-        } else if (lastEditedField == EditedField.PASSBAND) {
-            // 相对位置不变（passbandPosition），TX 用地面频率，RX 经 Transceiver 完整路径计算
-            txFrequencyHz = txLow + (passbandPosition * txRange).toLong()
-            rxFrequencyHz = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
-                txFrequencyHz, rawTransponder, orbitalPos, offsetHz
-            ) ?: rxFrequencyHz
-        }
-    }
-
-    val txSliderValue = if (lastEditedField == EditedField.PASSBAND) {
-        passbandPosition
-    } else {
-        ((txFrequencyHz - txLow).toFloat() / txRange).coerceIn(0f, 1f)
-    }
-    val rxSliderValue = if (lastEditedField == EditedField.PASSBAND) {
-        ((rxFrequencyHz - rxLow).toFloat() / rxRange).coerceIn(0f, 1f)
-    } else {
-        ((rxFrequencyHz - rxLow).toFloat() / rxRange).coerceIn(0f, 1f)
-    }
-
-    fun updateTx(newTxHz: Long) {
-        when (lastEditedField) {
-            EditedField.PASSBAND -> {
-                // Passband 模式：滑块位置 → passbandPosition → 地面频率，RX 经 Transceiver 计算
-                val pos = ((newTxHz - txLow).toFloat() / txRange).coerceIn(0f, 1f)
-                passbandPosition = pos
-                txFrequencyHz = txLow + (pos * txRange).toLong()
-                rxFrequencyHz = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
-                    txFrequencyHz, rawTransponder, orbitalPos, offsetHz
-                ) ?: rxFrequencyHz
+        if (lastEditedBy == EditedField.TX) {
+            val txMHz = txInputMHz.toDoubleOrNull()
+            if (txMHz != null && txMHz > 0) {
+                val txHz = (txMHz * 1_000_000).toLong()
+                val rxHz = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
+                    txHz, transponder, orbitalPos, offsetHz
+                )
+                if (rxHz != null) {
+                    rxInputMHz = String.format(Locale.ENGLISH, "%.6f", rxHz / 1_000_000.0)
+                }
             }
-            else -> {
-                txFrequencyHz = newTxHz.coerceIn(txLow, txHigh)
-                rxFrequencyHz = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
-                    txFrequencyHz, rawTransponder, orbitalPos, offsetHz
-                ) ?: rxFrequencyHz
-            }
-        }
-    }
-
-    fun updateRx(newRxHz: Long) {
-        when (lastEditedField) {
-            EditedField.PASSBAND -> {
-                // Passband 模式：从 RX 反推 TX 位置，TX 用地面频率
-                val pos = ((newRxHz - rxLow).toFloat() / rxRange).coerceIn(0f, 1f)
-                val txFromRx = TransponderMapper.mapDownlinkToUplink(newRxHz, rawTransponder)
-                passbandPosition = if (txFromRx != null) {
-                    ((txFromRx - rawTxLow).toFloat() / rawTxRange).coerceIn(0f, 1f)
-                } else pos
-                txFrequencyHz = txLow + (passbandPosition * txRange).toLong()
-                rxFrequencyHz = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
-                    txFrequencyHz, rawTransponder, orbitalPos, offsetHz
-                ) ?: rxFrequencyHz
-            }
-            else -> {
-                rxFrequencyHz = newRxHz.coerceIn(rxLow, rxHigh)
-                txFrequencyHz = DopplerFrequencyCalculator.computeUplinkFromDownlinkWithOffset(
-                    rxFrequencyHz, rawTransponder, orbitalPos, offsetHz
-                ) ?: txFrequencyHz
+        } else {
+            val rxMHz = rxInputMHz.toDoubleOrNull()
+            if (rxMHz != null && rxMHz > 0) {
+                val rxHz = (rxMHz * 1_000_000).toLong()
+                val txHz = DopplerFrequencyCalculator.computeUplinkFromDownlinkWithOffset(
+                    rxHz, transponder, orbitalPos, offsetHz
+                )
+                if (txHz != null) {
+                    txInputMHz = String.format(Locale.ENGLISH, "%.6f", txHz / 1_000_000.0)
+                }
             }
         }
     }
 
     Column(
-        modifier = modifier.fillMaxWidth().padding(top = 16.dp),
-        verticalArrangement = Arrangement.spacedBy(12.dp)
+        modifier = modifier,
+        verticalArrangement = Arrangement.spacedBy(4.dp)
     ) {
-            Row(
-                modifier = Modifier.fillMaxWidth().height(IntrinsicSize.Min),
-                verticalAlignment = Alignment.CenterVertically,
-                horizontalArrangement = Arrangement.spacedBy(6.dp)
-            ) {
-                // 左半边: TX + RX 按钮
-                Row(
-                    modifier = Modifier.weight(1f),
-                    horizontalArrangement = Arrangement.spacedBy(4.dp),
-                    verticalAlignment = Alignment.CenterVertically
-                ) {
-                    FilterChip(
-                        selected = lastEditedField == EditedField.TX,
-                        onClick = {
-                            when (lastEditedField) {
-                                EditedField.TX -> {
-                                    passbandPosition = ((txFrequencyHz - txLow).toFloat() / txRange).coerceIn(0f, 1f)
-                                    lastEditedField = EditedField.PASSBAND
-                                    rxFrequencyHz = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
-                                        txFrequencyHz, rawTransponder, orbitalPos, offsetHz
-                                    ) ?: rxFrequencyHz
-                                }
-                                EditedField.PASSBAND -> { lastEditedField = EditedField.TX }
-                                else -> { lastEditedField = EditedField.TX }
-                            }
-                        },
-                        label = {
-                            Text("TX", fontSize = 13.sp, textAlign = TextAlign.Center,
-                                modifier = Modifier.fillMaxWidth())
-                        },
-                        modifier = Modifier.weight(1f).fillMaxHeight()
-                    )
-                    FilterChip(
-                        selected = lastEditedField == EditedField.RX,
-                        onClick = {
-                            when (lastEditedField) {
-                                EditedField.RX -> {
-                                    txFrequencyHz = DopplerFrequencyCalculator.computeUplinkFromDownlinkWithOffset(
-                                        rxFrequencyHz, rawTransponder, orbitalPos, offsetHz
-                                    ) ?: txFrequencyHz
-                                    passbandPosition = ((txFrequencyHz - txLow).toFloat() / txRange).coerceIn(0f, 1f)
-                                    lastEditedField = EditedField.PASSBAND
-                                }
-                                EditedField.PASSBAND -> {
-                                    lastEditedField = EditedField.RX
-                                    txFrequencyHz = DopplerFrequencyCalculator.computeUplinkFromDownlinkWithOffset(
-                                        rxFrequencyHz, rawTransponder, orbitalPos, offsetHz
-                                    ) ?: txFrequencyHz
-                                }
-                                else -> { lastEditedField = EditedField.RX }
-                            }
-                        },
-                        label = {
-                            Text("RX", fontSize = 13.sp, textAlign = TextAlign.Center,
-                                modifier = Modifier.fillMaxWidth())
-                        },
-                        modifier = Modifier.weight(1f).fillMaxHeight()
-                    )
-                }
-                // 右半边: Offset 输入框（带细线边框）
-                Box(
-                    modifier = Modifier
-                        .weight(1f)
-                        .height(48.dp)
-                        .border(1.dp, MaterialTheme.colorScheme.outline, MaterialTheme.shapes.small),
-                    contentAlignment = Alignment.Center
-                ) {
-                    BasicTextField(
-                        value = offsetKHz,
-                        onValueChange = { offsetKHz = it },
-                        singleLine = true,
-                        textStyle = TextStyle(
-                            fontSize = 16.sp,
-                            textAlign = TextAlign.Center,
-                            color = MaterialTheme.colorScheme.onSurface
-                        ),
-                        decorationBox = { innerTextField ->
-                            if (offsetKHz.isEmpty()) {
-                                Text(
-                                    text = "Offset (kHz)",
-                                    fontSize = 16.sp,
-                                    color = MaterialTheme.colorScheme.onSurfaceVariant
-                                )
-                            }
-                            innerTextField()
-                        }
-                    )
-                }
-            }
+        Text(
+            text = stringResource(R.string.radar_doppler_calc),
+            fontSize = 14.sp,
+            fontWeight = FontWeight.Medium,
+            color = MaterialTheme.colorScheme.primary
+        )
+        Text(
+            text = stringResource(R.string.radar_doppler_info),
+            fontSize = 12.sp,
+            color = MaterialTheme.colorScheme.onSurfaceVariant
+        )
 
-            // TX 行
-            Column(modifier = Modifier.fillMaxWidth()) {
-                Row(verticalAlignment = Alignment.CenterVertically) {
-                    OutlinedButton(
-                        onClick = { updateTx(txFrequencyHz - stepSizeKHz * 1000L) },
-                        modifier = Modifier.width(32.dp).height(28.dp),
-                        contentPadding = PaddingValues(0.dp),
-                        shape = MaterialTheme.shapes.extraSmall
-                    ) { Text("−", fontSize = 14.sp) }
-
-                    Slider(
-                        value = txSliderValue,
-                        onValueChange = { norm ->
-                            val rawFreq = txLow + (txRange * norm).toLong()
-                            val snapped = ((rawFreq + 500) / 1000L) * 1000L
-                            updateTx(snapped.coerceIn(txLow, txHigh))
-                        },
-                        valueRange = 0f..1f,
-                        modifier = Modifier.weight(1f).height(20.dp).padding(horizontal = 4.dp)
-                    )
-
-                    OutlinedButton(
-                        onClick = { updateTx(txFrequencyHz + stepSizeKHz * 1000L) },
-                        modifier = Modifier.width(32.dp).height(28.dp),
-                        contentPadding = PaddingValues(0.dp),
-                        shape = MaterialTheme.shapes.extraSmall
-                    ) { Text("+", fontSize = 14.sp) }
-                }
-                Row(
-                    modifier = Modifier.fillMaxWidth().padding(horizontal = 4.dp),
-                    verticalAlignment = Alignment.CenterVertically
-                ) {
-                    Text(
-                        text = String.format(Locale.ENGLISH, "%.4f", txLow / 1_000_000.0),
-                        fontSize = 12.sp,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant,
-                        modifier = Modifier.weight(1f)
-                    )
-                    Row(
-                        verticalAlignment = Alignment.CenterVertically,
-                        horizontalArrangement = Arrangement.Center
-                    ) {
-                        Text(
-                            text = String.format(Locale.ENGLISH, "%.6f", txFrequencyHz / 1_000_000.0),
-                            fontSize = 20.sp,
-                            fontWeight = FontWeight.Bold,
-                            color = MaterialTheme.colorScheme.primary
-                        )
-                        Text(
-                            text = " MHz",
-                            fontSize = 20.sp,
-                            fontWeight = FontWeight.Bold,
-                            color = MaterialTheme.colorScheme.primary
+        // Offset input
+        OutlinedTextField(
+            value = offsetKHz,
+            onValueChange = { newVal ->
+                offsetKHz = newVal
+                // Trigger recompute based on last edited field
+                if (lastEditedBy == EditedField.TX) {
+                    val txMHz = txInputMHz.toDoubleOrNull()
+                    if (txMHz != null && txMHz > 0) {
+                        val txHz = (txMHz * 1_000_000).toLong()
+                        val rxHz = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
+                            txHz, transponder, orbitalPos, offsetHz
                         )
+                        rxInputMHz = if (rxHz != null) String.format(Locale.ENGLISH, "%.6f", rxHz / 1_000_000.0) else ""
+                    }
+                } else {
+                    val rxMHz = rxInputMHz.toDoubleOrNull()
+                    if (rxMHz != null && rxMHz > 0) {
+                        val rxHz = (rxMHz * 1_000_000).toLong()
+                        val txHz = DopplerFrequencyCalculator.computeUplinkFromDownlinkWithOffset(
+                            rxHz, transponder, orbitalPos, offsetHz
+                        )
+                        txInputMHz = if (txHz != null) String.format(Locale.ENGLISH, "%.6f", txHz / 1_000_000.0) else ""
                     }
-                    Text(
-                        text = String.format(Locale.ENGLISH, "%.4f", txHigh / 1_000_000.0),
-                        fontSize = 12.sp,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant,
-                        modifier = Modifier.weight(1f),
-                        textAlign = TextAlign.End
-                    )
                 }
-            }
+            },
+            label = { Text(stringResource(R.string.radar_doppler_offset_hint)) },
+            singleLine = true,
+            keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Decimal),
+            modifier = Modifier.fillMaxWidth()
+        )
 
-            HorizontalDivider(
-                thickness = 0.5.dp,
-                color = MaterialTheme.colorScheme.outline.copy(alpha = 0.3f)
+        // TX and RX inputs on the same row
+        Row(
+            horizontalArrangement = Arrangement.spacedBy(8.dp),
+            modifier = Modifier.fillMaxWidth()
+        ) {
+            // TX input → compute RX
+            OutlinedTextField(
+                value = txInputMHz,
+                onValueChange = { newVal ->
+                    txInputMHz = newVal
+                    lastEditedBy = EditedField.TX
+                    val mhz = newVal.toDoubleOrNull()
+                    if (mhz != null && mhz > 0) {
+                        val txHz = (mhz * 1_000_000).toLong()
+                        val rxHz = DopplerFrequencyCalculator.computeDownlinkFromUplinkWithOffset(
+                            txHz, transponder, orbitalPos, offsetHz
+                        )
+                        rxInputMHz = if (rxHz != null) String.format(Locale.ENGLISH, "%.6f", rxHz / 1_000_000.0) else ""
+                    } else if (newVal.isEmpty()) {
+                        rxInputMHz = ""
+                    }
+                },
+                label = { Text(stringResource(R.string.radar_doppler_tx_hint)) },
+                singleLine = true,
+                keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Decimal),
+                modifier = Modifier.weight(1f)
             )
 
-            // RX 行
-            Column(modifier = Modifier.fillMaxWidth()) {
-                Row(verticalAlignment = Alignment.CenterVertically) {
-                    OutlinedButton(
-                        onClick = { updateRx(rxFrequencyHz - stepSizeKHz * 1000L) },
-                        modifier = Modifier.width(32.dp).height(28.dp),
-                        contentPadding = PaddingValues(0.dp),
-                        shape = MaterialTheme.shapes.extraSmall
-                    ) { Text("−", fontSize = 14.sp) }
-
-                    Slider(
-                        value = rxSliderValue,
-                        onValueChange = { norm ->
-                            val rawFreq = rxLow + (rxRange * norm).toLong()
-                            val snapped = ((rawFreq + 500) / 1000L) * 1000L
-                            updateRx(snapped.coerceIn(rxLow, rxHigh))
-                        },
-                        valueRange = 0f..1f,
-                        modifier = Modifier.weight(1f).height(20.dp).padding(horizontal = 4.dp)
-                    )
-
-                    OutlinedButton(
-                        onClick = { updateRx(rxFrequencyHz + stepSizeKHz * 1000L) },
-                        modifier = Modifier.width(32.dp).height(28.dp),
-                        contentPadding = PaddingValues(0.dp),
-                        shape = MaterialTheme.shapes.extraSmall
-                    ) { Text("+", fontSize = 14.sp) }
-                }
-                Row(
-                    modifier = Modifier.fillMaxWidth().padding(horizontal = 4.dp),
-                    verticalAlignment = Alignment.CenterVertically
-                ) {
-                    Text(
-                        text = String.format(Locale.ENGLISH, "%.4f", rxLow / 1_000_000.0),
-                        fontSize = 12.sp,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant,
-                        modifier = Modifier.weight(1f)
-                    )
-                    Row(
-                        verticalAlignment = Alignment.CenterVertically,
-                        horizontalArrangement = Arrangement.Center
-                    ) {
-                        Text(
-                            text = String.format(Locale.ENGLISH, "%.6f", rxFrequencyHz / 1_000_000.0),
-                            fontSize = 20.sp,
-                            fontWeight = FontWeight.Bold,
-                            color = MaterialTheme.colorScheme.primary
-                        )
-                        Text(
-                            text = " MHz",
-                            fontSize = 20.sp,
-                            fontWeight = FontWeight.Bold,
-                            color = MaterialTheme.colorScheme.primary
+            // RX input → compute TX
+            OutlinedTextField(
+                value = rxInputMHz,
+                onValueChange = { newVal ->
+                    rxInputMHz = newVal
+                    lastEditedBy = EditedField.RX
+                    val mhz = newVal.toDoubleOrNull()
+                    if (mhz != null && mhz > 0) {
+                        val rxHz = (mhz * 1_000_000).toLong()
+                        val txHz = DopplerFrequencyCalculator.computeUplinkFromDownlinkWithOffset(
+                            rxHz, transponder, orbitalPos, offsetHz
                         )
+                        txInputMHz = if (txHz != null) String.format(Locale.ENGLISH, "%.6f", txHz / 1_000_000.0) else ""
+                    } else if (newVal.isEmpty()) {
+                        txInputMHz = ""
                     }
-                    Text(
-                        text = String.format(Locale.ENGLISH, "%.4f", rxHigh / 1_000_000.0),
-                        fontSize = 12.sp,
-                        color = MaterialTheme.colorScheme.onSurfaceVariant,
-                        modifier = Modifier.weight(1f),
-                        textAlign = TextAlign.End
-                    )
-                }
-            }
+                },
+                label = { Text(stringResource(R.string.radar_doppler_rx_hint)) },
+                singleLine = true,
+                keyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Decimal),
+                modifier = Modifier.weight(1f)
+            )
         }
+    }
 }
 
+private enum class EditedField { TX, RX }
+
 @Composable
 private fun CwDecoderPanel(
     cw: CwSubState,
@@ -935,43 +669,39 @@ private fun CwDecoderPanel(
         }
 
         AnimatedVisibility(visible = cw.isExpanded) {
-            // PR #1 Morse Expert engine: mini layout with waterfall + decoded text.
-            // Keep the old Kotlin decoder state/actions as fallback code, but this panel no longer feeds it.
+            // Morse Expert 引擎(4.5.0 移植): 小布局 cw_panel_main(瀑布图 + 解码文本)
+            // 自带 Kotlin 贝叶斯引擎(CwDecoder)不再用于此面板(代码保留作回退)
             val context = LocalContext.current
-            val activity = remember(context) {
-                context as? Activity ?: error("CwDecoderPanel must be hosted in an Activity")
-            }
+            val activity = remember { context as? Activity }
             val controller = remember { MainActivity() }
-            val rootView = remember(context) {
-                LayoutInflater.from(context).inflate(CwR.layout.activity_main, null) as ConstraintLayout
+            val rootView = remember {
+                LayoutInflater.from(context).inflate(CwR.layout.cw_panel_main, null) as ConstraintLayout
             }
             var initialized by remember { mutableStateOf(false) }
             var listening by remember { mutableStateOf(false) }
 
-            // 重要: 不在展开时初始化控制器(避免"一展开就崩溃")。
-            // controller.onCreate/onResume/onPermissionGranted 全部推迟到用户点 Start 才执行。
-            fun startDecoding() {
-                if (!initialized) {
-                    controller.onCreate(activity, rootView)
-                    controller.onPermissionGranted()
-                    controller.onResume()
-                    initialized = true
-                } else {
-                    controller.onResume()
-                }
-                listening = true
-            }
-
+            // 生命周期: 展开即绑定视图(不改宿主窗口); 收起/离开自动释放
             DisposableEffect(Unit) {
+                if (activity != null) {
+                    controller.onCreate(activity, rootView, false)
+                }
                 onDispose {
-                    if (initialized) {
-                        controller.onPause()
-                        controller.onDestroy()
-                    }
+                    controller.onPause()
+                    controller.onDestroy()
+                }
+            }
+            // 权限已授予(首次进入/授权回调统一入口): 初始化引擎 + 启动录音
+            LaunchedEffect(cw.hasPermission) {
+                if (cw.hasPermission && !initialized) {
+                    controller.onPermissionGranted() // = v(): 创建音频采集 + 解码核心
+                    controller.onResume()            // 立即启动录音
+                    initialized = true
+                    listening = true
                 }
             }
 
             Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
+                // Control buttons row(映射到控制器)
                 Row(
                     horizontalArrangement = Arrangement.spacedBy(8.dp),
                     modifier = Modifier.fillMaxWidth()
@@ -981,8 +711,14 @@ private fun CwDecoderPanel(
                             onClick = {
                                 if (!cw.hasPermission) {
                                     requestMicPermission()
+                                } else if (!initialized) {
+                                    controller.onPermissionGranted()
+                                    controller.onResume()
+                                    initialized = true
+                                    listening = true
                                 } else {
-                                    startDecoding()
+                                    controller.onResume()
+                                    listening = true
                                 }
                             },
                             modifier = Modifier.weight(1f)
@@ -1001,23 +737,20 @@ private fun CwDecoderPanel(
                         }
                     }
                     OutlinedButton(
-                        onClick = { if (initialized) controller.clearDecoded() },
+                        onClick = { controller.clearDecoded() },
                         modifier = Modifier.weight(1f)
                     ) {
                         Text(stringResource(R.string.radar_cw_reset))
                     }
                 }
 
-                Box(
+                // 瀑布图 + 解码文本(原版布局迷你版, 适配容器)
+                AndroidView(
+                    factory = { rootView },
                     modifier = Modifier
                         .fillMaxWidth()
                         .height(150.dp)
-                ) {
-                    AndroidView(
-                        factory = { rootView },
-                        modifier = Modifier.fillMaxSize()
-                    )
-                }
+                )
             }
         }
     }
@@ -1038,11 +771,5 @@ private fun FrequencyText(frequency: Long?, modifier: Modifier = Modifier) {
     )
 }
 
-private fun transceiverTitle(radio: SatRadio): String {
-    val title = if (radio.isInverted) "INV: ${radio.info}" else radio.info
-    val mode = "${radio.downlinkMode ?: "--"}/${radio.uplinkMode ?: "--"}"
-    return "$title ($mode)"
-}
-
 private val FREQ_ADJUSTMENTS =
     listOf(-10_000L to "-10k", -1_000L to "-1k", -100L to "-100", 100L to "+100", 1_000L to "+1k", 10_000L to "+10k")

feature/roaming/build.gradle.kts

@@ -0,0 +1,11 @@
+plugins {
+    alias(libs.plugins.convention.featurePlugin)
+}
+
+android {
+    namespace = "com.rtbishop.look4sat.feature.roaming"
+}
+
+dependencies {
+    implementation(project(":core:data"))
+}

feature/roaming/src/main/java/com/rtbishop/look4sat/feature/roaming/RoamingScreen.kt

@@ -0,0 +1,791 @@
+/*
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.rtbishop.look4sat.feature.roaming
+
+import android.Manifest
+import android.annotation.SuppressLint
+import android.content.Context
+import android.content.Intent
+import android.content.pm.PackageManager
+import android.location.Location
+import android.location.LocationListener
+import android.location.LocationManager
+import android.os.Bundle
+import android.provider.Settings
+import androidx.activity.compose.rememberLauncherForActivityResult
+import androidx.activity.result.contract.ActivityResultContracts
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.background
+import androidx.compose.foundation.shape.CircleShape
+import androidx.compose.foundation.clickable
+import androidx.compose.foundation.layout.Box
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.Spacer
+import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.offset
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.windowInsetsPadding
+import androidx.compose.foundation.layout.systemBars
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.DisposableEffect
+import androidx.compose.runtime.LaunchedEffect
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.text.style.TextAlign
+import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import androidx.core.content.ContextCompat
+import java.text.SimpleDateFormat
+import java.util.Date
+import java.util.Locale
+
+/**
+ * 漫游页 —— 原样照搬自 QTH定位器 2.0 (com.us1pm.gridsquarelocator)。
+ * UI: res/layout/main.xml (结构/尺寸/颜色逐项照搬, 不做任何更改)
+ * 逻辑: MainActivity.showLocation() / checkEnabled() / GPS 实时监听
+ * 红线: UI 与逻辑均不更改, 与成品截图逐像素对齐。
+ */
+@Composable
+fun RoamingScreen() {
+    val context = LocalContext.current
+    var state by remember { mutableStateOf(RoamingState()) }
+    // 照搬 onCreate: 日期固定文本 + 小时前缀(定位时拼接分钟)
+    val dateText = remember { SimpleDateFormat("dd MMM yyyy", Locale.getDefault()).format(Date()) }
+    var hourPrefix by remember { mutableStateOf("") }
+    // 照搬 onCreate: 初始 checkEnabled() -> 红点+设置按钮, 日期隐藏
+    var hasPermission by remember { mutableStateOf(false) }
+    val permissionLauncher = rememberLauncherForActivityResult(
+        ActivityResultContracts.RequestMultiplePermissions()
+    ) { }
+    LaunchedEffect(Unit) {
+        hourPrefix = SimpleDateFormat("HH:mm", Locale.getDefault()).format(Date()).substring(0, 3)
+        val fine = ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_FINE_LOCATION) ==
+            PackageManager.PERMISSION_GRANTED
+        val coarse = ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_COARSE_LOCATION) ==
+            PackageManager.PERMISSION_GRANTED
+        hasPermission = fine || coarse
+        if (!hasPermission) {
+            permissionLauncher.launch(
+                arrayOf(Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION)
+            )
+        } else {
+            // 照搬 onResume: 绿点+进度条+提示+日期显示, 红点/按钮隐藏
+            state = state.copy(gpsOn = true, gpsOff = false, showSettings = false, showProgress = true, showNotice = true, showDate = true)
+        }
+    }
+    // 照搬 onResume/onPause: GPS + network 监听, 10 秒 / 10 米
+    val locationManager = remember { context.getSystemService(Context.LOCATION_SERVICE) as LocationManager }
+    DisposableEffect(locationManager, hasPermission) {
+        if (hasPermission) {
+            @SuppressLint("MissingPermission")
+            val listener = object : LocationListener {
+                override fun onLocationChanged(location: Location) {
+                    // 照搬 showLocation 开头: 只接受 gps / network provider
+                    if (location.provider != "gps" && location.provider != "network") return
+                    state = roamingStateFromLocation(location.latitude, location.longitude, location.time, hourPrefix)
+                        .copy(date = dateText)
+                }
+
+                override fun onProviderDisabled(provider: String) {
+                    // 照搬 checkEnabled: 红点+按钮, 日期隐藏
+                    state = state.copy(gpsOn = false, gpsOff = true, showSettings = true, showProgress = false, showNotice = false, showDate = false)
+                }
+
+                override fun onProviderEnabled(provider: String) {
+                    state = state.copy(gpsOn = true, gpsOff = false, showSettings = false, showProgress = true, showNotice = true, showDate = true)
+                }
+
+                @Deprecated("Deprecated in Java")
+                override fun onStatusChanged(provider: String?, status: Int, extras: Bundle?) = Unit
+            }
+            try {
+                locationManager.requestLocationUpdates("gps", 10_000L, 10f, listener)
+                locationManager.requestLocationUpdates("network", 10_000L, 10f, listener)
+            } catch (_: SecurityException) {
+            }
+            onDispose { locationManager.removeUpdates(listener) }
+        } else {
+            onDispose { }
+        }
+    }
+    // 照搬 res/layout/main.xml: 浅色页面, 蓝色信息区, 43sp 定位码, 3x3 九宫格, 底部版权
+    // 按用户要求: 上下往内缩进系统栏安全区, 避免内容被状态栏/导航栏遮挡
+    Column(
+        modifier = Modifier
+            .fillMaxSize()
+            .background(MaterialTheme.colorScheme.background)
+            .windowInsetsPadding(WindowInsets.systemBars)
+    ) {
+        // relativeLayout7: 顶部 GPS 状态条, 25dp 高, holo_blue_bright
+        Box(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(2.dp)
+                .height(25.dp)
+                .background(MaterialTheme.colorScheme.surfaceVariant)
+        ) {
+            Row(modifier = Modifier.fillMaxSize(), verticalAlignment = Alignment.CenterVertically) {
+                // tvTitleGPS: "GPS" 14sp 黑, 左 8dp
+                Text(
+                    text = "GPS",
+                    fontSize = 14.sp,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(start = 8.dp)
+                )
+                // imGps: toRightOf tvTitleGPS + marginLeft 15dp (成品 main.xml)
+                Spacer(modifier = Modifier.width(15.dp))
+                // imGps: 绿点 (15dp, 主题色 primary -> 夜间滤镜下可见)
+                if (state.gpsOn) {
+                    Box(
+                        modifier = Modifier
+                            .size(15.dp)
+                            .background(MaterialTheme.colorScheme.primary, CircleShape)
+                    )
+                }
+                // imGpsOff: 红点叠层 (15dp, 主题色 error)
+                if (state.gpsOff) {
+                    Box(
+                        modifier = Modifier
+                            .size(15.dp)
+                            .background(MaterialTheme.colorScheme.error, CircleShape)
+                    )
+                }
+                Spacer(modifier = Modifier.weight(1f))
+                // tvDate: 14sp 黑, 居中
+                if (state.showDate) {
+                    Text(text = state.date.ifEmpty { dateText }, fontSize = 14.sp, color = MaterialTheme.colorScheme.onSurfaceVariant)
+                }
+                Spacer(modifier = Modifier.weight(1f))
+                // tvTime: 14sp 黑, 右对齐
+                Text(
+                    text = state.time,
+                    fontSize = 14.sp,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.padding(end = 8.dp)
+                )
+            }
+            // btnLocationSettings: 黄色按钮, 居中
+            // btnLocationSettings: 成品 #faf8f54a 半透明黄, 14sp 黑字, 居中
+            if (state.showSettings) {
+                Box(
+                    modifier = Modifier
+                        .align(Alignment.Center)
+                        .background(MaterialTheme.colorScheme.primary)
+                        .clickable { context.startActivity(Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS)) }
+                        .padding(horizontal = 5.dp),
+                    contentAlignment = Alignment.Center
+                ) {
+                    Text(text = "设置启用GPS", fontSize = 14.sp, color = MaterialTheme.colorScheme.onPrimary)
+                }
+            }
+        }
+        // linearLayout4: 经纬度区, holo_blue_bright
+        Column(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(horizontal = 2.dp)
+                .background(MaterialTheme.colorScheme.surfaceVariant)
+        ) {
+            // 纬度行: tvLati 16sp 黑 左 8dp | tvLat 右对齐 3dp
+            Row(modifier = Modifier.fillMaxWidth().padding(vertical = 2.dp), verticalAlignment = Alignment.CenterVertically) {
+                Text(text = state.latLabel, fontSize = 16.sp, color = MaterialTheme.colorScheme.onSurfaceVariant, modifier = Modifier.padding(start = 8.dp))
+                Spacer(modifier = Modifier.weight(1f))
+                Text(text = state.latValue, fontSize = 14.sp, color = MaterialTheme.colorScheme.onSurfaceVariant, modifier = Modifier.padding(end = 3.dp))
+            }
+            // 经度行
+            Row(modifier = Modifier.fillMaxWidth().padding(vertical = 2.dp), verticalAlignment = Alignment.CenterVertically) {
+                Text(text = state.lonLabel, fontSize = 16.sp, color = MaterialTheme.colorScheme.onSurfaceVariant, modifier = Modifier.padding(start = 8.dp))
+                Spacer(modifier = Modifier.weight(1f))
+                Text(text = state.lonValue, fontSize = 14.sp, color = MaterialTheme.colorScheme.onSurfaceVariant, modifier = Modifier.padding(end = 3.dp))
+            }
+        }
+        // relativeLayout6: 定位码区, 43sp bold 黑居中
+        Box(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(2.dp)
+                .background(MaterialTheme.colorScheme.surfaceVariant)
+        ) {
+            Text(
+                text = state.loc,
+                fontSize = 43.sp,
+                fontWeight = FontWeight.Bold,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                textAlign = TextAlign.Center,
+                modifier = Modifier.fillMaxWidth()
+            )
+            // progressBar: 加载中, 居中
+            if (state.showProgress) {
+                CircularProgressIndicator(
+                    modifier = Modifier.size(24.dp).align(Alignment.Center),
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    strokeWidth = 2.dp
+                )
+            }
+            // tvNotice: 提示文字, 居中顶部
+            if (state.showNotice) {
+                Text(
+                    text = "请稍等，加载可能需要几分钟的时间。",
+                    fontSize = 16.sp,
+                    fontStyle = androidx.compose.ui.text.font.FontStyle.Italic,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    modifier = Modifier.align(Alignment.TopCenter).padding(top = 2.dp)
+                )
+            }
+        }
+        // relativeLayout: 九宫格, 占满剩余, 底部 15dp
+        // 用 Box 等价 RelativeLayout 布局: 左格贴左 / 中格水平居中 / 右格贴右 (成品 main.xml)
+        Column(modifier = Modifier.fillMaxWidth().weight(1f).padding(bottom = 15.dp)) {
+            // 行1: relativeLayout5 (上排: 纬度 +1)
+            Box(modifier = Modifier.fillMaxWidth().weight(1f)) {
+                GridCell(text = state.grids[0], modifier = Modifier.width(80.dp).fillMaxHeight().align(Alignment.CenterStart))
+                GridCell(text = state.grids[1], modifier = Modifier.width(200.dp).fillMaxHeight().align(Alignment.Center))
+                GridCell(text = state.grids[2], modifier = Modifier.width(80.dp).fillMaxHeight().align(Alignment.CenterEnd))
+            }
+            // 行2: relativeLayout4, 205dp 高 (中排: 中央)
+            Box(modifier = Modifier.fillMaxWidth().height(205.dp)) {
+                GridCell(text = state.grids[3], modifier = Modifier.width(80.dp).fillMaxHeight().align(Alignment.CenterStart))
+                // 中央列: tv22 (100x80dp centerInParent) 叠在 linearLayout3 (200x200dp) 之上
+                Box(modifier = Modifier.width(200.dp).fillMaxHeight().align(Alignment.Center)) {
+                    // linearLayout3: 200x200dp, marginTop 2dp, holo_blue_bright
+                    Box(
+                        modifier = Modifier
+                            .align(Alignment.TopCenter)
+                            .offset(y = 2.dp)
+                            .size(width = 200.dp, height = 200.dp)
+                            .background(MaterialTheme.colorScheme.surfaceVariant)
+                    ) {
+                        // iv: 红点 10x10dp, top|left, leftMargin/topMargin 查表绝对定位
+                        Image(
+                            painter = painterResource(R.drawable.roam_pnt),
+                            contentDescription = null,
+                            modifier = Modifier
+                                .size(10.dp)
+                                .offset(x = state.markerLeft.dp, y = state.markerTop.dp)
+                        )
+                    }
+                    // tv22: 100x80dp centerInParent, 30sp bold, textColorHighlight(白)
+                    Text(
+                        text = state.grids[4],
+                        fontSize = 30.sp,
+                        fontWeight = FontWeight.Bold,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                        textAlign = TextAlign.Center,
+                        modifier = Modifier
+                            .size(width = 100.dp, height = 80.dp)
+                            .align(Alignment.Center)
+                    )
+                }
+                GridCell(text = state.grids[5], modifier = Modifier.width(80.dp).fillMaxHeight().align(Alignment.CenterEnd))
+            }
+            // 行3: relativeLayout3 (下排: 纬度 -1)
+            Box(modifier = Modifier.fillMaxWidth().weight(1f)) {
+                GridCell(text = state.grids[6], modifier = Modifier.width(80.dp).fillMaxHeight().align(Alignment.CenterStart))
+                GridCell(text = state.grids[7], modifier = Modifier.width(200.dp).fillMaxHeight().align(Alignment.Center))
+                GridCell(text = state.grids[8], modifier = Modifier.width(80.dp).fillMaxHeight().align(Alignment.CenterEnd))
+            }
+        }
+        // tv4: 底部版权, 10sp 黑 (往上拉, 底部预留空间避免被导航栏遮挡)
+        Text(
+            text = "制作：US1PM  汉化：BA7LCE",
+            fontSize = 10.sp,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+            textAlign = TextAlign.Center,
+            modifier = Modifier.fillMaxWidth().padding(bottom = 10.dp)
+        )
+    }
+}
+
+// 周边格: 60/200/60dp, #0BACF1, bold 居中, 2dp margin (照搬 tv11/tv13/tv21/tv23/tv31/tv33)
+@Composable
+private fun GridCell(text: String, modifier: Modifier) {
+    Box(
+        modifier = modifier
+            .padding(2.dp)
+            .background(MaterialTheme.colorScheme.surface),
+        contentAlignment = Alignment.Center
+    ) {
+        Text(
+            text = text,
+            fontSize = 14.sp,
+            fontWeight = FontWeight.Bold,
+            color = MaterialTheme.colorScheme.onSurface,
+            textAlign = TextAlign.Center
+        )
+    }
+}
+
+/**
+ * 照搬 MainActivity.showLocation() 的状态。
+ * 网格/九宫格/红点查表与成品逐行一致。
+ */
+data class RoamingState(
+    val date: String = "",
+    val time: String = "",
+    val latLabel: String = "纬度",
+    val latValue: String = "",
+    val lonLabel: String = "经度",
+    val lonValue: String = "",
+    val loc: String = "",
+    val grids: List<String> = List(9) { "" },
+    /** 红点 leftMargin(dp), 经度第 3 对字符查表 */
+    val markerLeft: Int = 0,
+    /** 红点 topMargin(dp), 纬度第 3 对字符查表(屏幕 Y 反转) */
+    val markerTop: Int = 0,
+    val gpsOn: Boolean = false,
+    val gpsOff: Boolean = true,
+    val showSettings: Boolean = true,
+    val showProgress: Boolean = false,
+    val showNotice: Boolean = false,
+    val showDate: Boolean = false
+)
+
+/**
+ * 照搬 showLocation() 的完整计算: 时间/经纬度 DMS/8 位网格/九宫格/红点查表。
+ */
+fun roamingStateFromLocation(lat: Double, lon: Double, fixTime: Long, hourPrefix: String): RoamingState {
+    // 照搬: tvTime = 缓存小时前缀 + 定位时间分钟
+    val minute = SimpleDateFormat("mm", Locale.getDefault()).format(Date(fixTime))
+    val time = hourPrefix + minute
+    // 方向字符
+    val ew = if (lon >= 0.0) "E" else "W"
+    val ns = if (lat >= 0.0) "N" else "S"
+    // 照搬: 纬度 DMS (String.valueOf 无补零)
+    val latAbs = if (lat < 0.0) -lat else lat
+    val latDeg = latAbs.toInt()
+    val latMinFull = (latAbs - latDeg) * 60.0
+    val latMin = latMinFull.toInt()
+    val latSec = ((latMinFull - latMin) * 60.0).toInt()
+    val latLabel = "纬度  $latDeg° $latMin' $latSec\" $ns"
+    val latValue = "$lat° "
+    // 照搬: 经度 DMS
+    val lonAbs = if (lon < 0.0) -lon else lon
+    val lonDeg = lonAbs.toInt()
+    val lonMinFull = (lonAbs - lonDeg) * 60.0
+    val lonMin = lonMinFull.toInt()
+    val lonSec = ((lonMinFull - lonMin) * 60.0).toInt()
+    val lonLabel = "经度 $lonDeg° $lonMin' $lonSec\" $ew"
+    val lonValue = "$lon° "
+    // 照搬: 8 位网格编码 (区间查表)
+    val (str, str2, str3, str4) = encodeLon(lon)
+    val (str5, str6, str38, str9) = encodeLat(lat)
+    val loc = str + str5 + str2 + str6 + str3 + str38 + str4 + str9
+    // 照搬: 九宫格 parseInt3 五分支
+    val grids = buildGrids(str, str5, str2, str6, str3, str38)
+    // 照搬: 红点查表 (第 3 对字符)
+    val markerLeft = lonMargin[str3.firstOrNull()] ?: 0
+    val markerTop = latMargin[str38.firstOrNull()] ?: 0
+    return RoamingState(
+        time = time,
+        latLabel = latLabel,
+        latValue = latValue,
+        lonLabel = lonLabel,
+        lonValue = lonValue,
+        loc = loc,
+        grids = grids,
+        markerLeft = markerLeft,
+        markerTop = markerTop,
+        gpsOn = true,
+        gpsOff = false,
+        showSettings = false,
+        showProgress = false,
+        showNotice = false,
+        showDate = true
+    )
+}
+
+// 红点 leftMargin 查表 (MainActivity 1286-1386 行): 经度第 3 对 a..x -> -2..190 dp
+private val lonMargin = mapOf(
+    'a' to -2, 'b' to 8, 'c' to 16, 'd' to 24, 'e' to 32, 'f' to 40, 'g' to 48, 'h' to 56,
+    'i' to 65, 'j' to 74, 'k' to 83, 'l' to 92, 'm' to 101, 'n' to 110, 'o' to 119, 'p' to 128,
+    'q' to 137, 'r' to 146, 's' to 155, 't' to 163, 'u' to 171, 'v' to 179, 'w' to 184, 'x' to 190
+)
+
+// 红点 topMargin 查表 (MainActivity 1315-1363 行): 纬度第 3 对 a..x -> 190..-2 dp (屏幕 Y 反转)
+private val latMargin = mapOf(
+    'a' to 190, 'b' to 182, 'c' to 174, 'd' to 169, 'e' to 163, 'f' to 155, 'g' to 146, 'h' to 137,
+    'i' to 128, 'j' to 119, 'k' to 110, 'l' to 101, 'm' to 92, 'n' to 83, 'o' to 74, 'p' to 65,
+    'q' to 56, 'r' to 48, 's' to 40, 't' to 32, 'u' to 24, 'v' to 16, 'w' to 8, 'x' to -2
+)
+
+// 照搬 311-611 行: 经度 -> (20°区字母, 2°数字, 2'字母, 30"数字)
+private fun encodeLon(inputLon: Double): List<String> {
+    var longitude = inputLon
+    var d = 0.0
+    val str = when {
+        (longitude >= -180.0) && (longitude <= -160.0) -> { longitude += 180.0; "A" }
+        (longitude >= -160.0) && (longitude <= -140.0) -> { longitude += 160.0; "B" }
+        (longitude >= -140.0) && (longitude <= -120.0) -> { longitude += 140.0; "C" }
+        (longitude >= -120.0) && (longitude <= -100.0) -> { longitude += 120.0; "D" }
+        (longitude >= -100.0) && (longitude <= -80.0) -> { longitude += 100.0; "E" }
+        (longitude >= -80.0) && (longitude <= -60.0) -> { longitude += 80.0; "F" }
+        (longitude >= -60.0) && (longitude <= -40.0) -> { longitude += 60.0; "G" }
+        (longitude >= -40.0) && (longitude <= -20.0) -> { longitude += 40.0; "H" }
+        (longitude >= -20.0) && (longitude <= 0.0) -> { longitude += 20.0; "I" }
+        (longitude >= 0.0) && (longitude <= 20.0) -> "J"
+        (longitude >= 20.0) && (longitude <= 40.0) -> { longitude -= 20.0; "K" }
+        (longitude >= 40.0) && (longitude <= 60.0) -> { longitude -= 40.0; "L" }
+        (longitude >= 60.0) && (longitude <= 80.0) -> { longitude -= 60.0; "M" }
+        (longitude >= 80.0) && (longitude <= 100.0) -> { longitude -= 80.0; "N" }
+        (longitude >= 100.0) && (longitude <= 120.0) -> { longitude -= 100.0; "O" }
+        (longitude >= 120.0) && (longitude <= 140.0) -> { longitude -= 120.0; "P" }
+        (longitude >= 140.0) && (longitude <= 160.0) -> { longitude -= 140.0; "Q" }
+        (longitude >= 160.0) && (longitude <= 180.0) -> { longitude -= 160.0; "R" }
+        else -> { longitude = 0.0; " " }
+    }
+    val str2 = when {
+        ((longitude >= 0.0) && (longitude <= 2.0)) || ((longitude >= -20.0) && (longitude <= -18.0)) -> { d = longitude * 60.0; "0" }
+        ((longitude >= 2.0) && (longitude <= 4.0)) || ((longitude >= -18.0) && (longitude <= -16.0)) -> { d = (longitude - 2.0) * 60.0; "1" }
+        ((longitude >= 4.0) && (longitude <= 6.0)) || ((longitude >= -16.0) && (longitude <= -14.0)) -> { d = (longitude - 4.0) * 60.0; "2" }
+        ((longitude >= 6.0) && (longitude <= 8.0)) || ((longitude >= -14.0) && (longitude <= -12.0)) -> { d = (longitude - 6.0) * 60.0; "3" }
+        ((longitude >= 8.0) && (longitude <= 10.0)) || ((longitude >= -12.0) && (longitude <= -10.0)) -> { d = (longitude - 8.0) * 60.0; "4" }
+        ((longitude >= 10.0) && (longitude <= 12.0)) || ((longitude >= -10.0) && (longitude <= -8.0)) -> { d = (longitude - 10.0) * 60.0; "5" }
+        ((longitude >= 12.0) && (longitude <= 14.0)) || ((longitude >= -8.0) && (longitude <= -6.0)) -> { d = (longitude - 12.0) * 60.0; "6" }
+        ((longitude >= 14.0) && (longitude <= 16.0)) || ((longitude >= -6.0) && (longitude <= -4.0)) -> { d = (longitude - 14.0) * 60.0; "7" }
+        ((longitude >= 16.0) && (longitude <= 18.0)) || ((longitude >= -4.0) && (longitude <= -2.0)) -> { d = (longitude - 16.0) * 60.0; "8" }
+        ((longitude >= 18.0) && (longitude <= 20.0)) || ((longitude >= -2.0) && (longitude <= 0.0)) -> { d = (longitude - 18.0) * 60.0; "9" }
+        else -> { d = 0.0; " " }
+    }
+    val str3 = when {
+        ((d >= 0.0) && (d <= 5.0)) || ((d >= -120.0) && (d <= -115.0)) -> { longitude = d * 60.0; "a" }
+        ((d >= 5.0) && (d <= 10.0)) || ((d >= -115.0) && (d <= -110.0)) -> { longitude = (d - 5.0) * 60.0; "b" }
+        ((d >= 10.0) && (d <= 15.0)) || ((d >= -110.0) && (d <= -105.0)) -> { longitude = (d - 10.0) * 60.0; "c" }
+        ((d >= 15.0) && (d <= 20.0)) || ((d >= -105.0) && (d <= -100.0)) -> { longitude = (d - 15.0) * 60.0; "d" }
+        ((d >= 20.0) && (d <= 25.0)) || ((d >= -100.0) && (d <= -95.0)) -> { longitude = (d - 20.0) * 60.0; "e" }
+        ((d >= 25.0) && (d <= 30.0)) || ((d >= -95.0) && (d <= -90.0)) -> { longitude = (d - 25.0) * 60.0; "f" }
+        ((d >= 30.0) && (d <= 35.0)) || ((d >= -90.0) && (d <= -85.0)) -> { longitude = (d - 30.0) * 60.0; "g" }
+        ((d >= 35.0) && (d <= 40.0)) || ((d >= -85.0) && (d <= -80.0)) -> { longitude = (d - 35.0) * 60.0; "h" }
+        ((d >= 40.0) && (d <= 45.0)) || ((d >= -80.0) && (d <= -75.0)) -> { longitude = (d - 40.0) * 60.0; "i" }
+        ((d >= 45.0) && (d <= 50.0)) || ((d >= -75.0) && (d <= -70.0)) -> { longitude = (d - 45.0) * 60.0; "j" }
+        ((d >= 50.0) && (d <= 55.0)) || ((d >= -70.0) && (d <= -65.0)) -> { longitude = (d - 50.0) * 60.0; "k" }
+        ((d >= 55.0) && (d <= 60.0)) || ((d >= -65.0) && (d <= -60.0)) -> { longitude = (d - 55.0) * 60.0; "l" }
+        ((d >= 60.0) && (d <= 65.0)) || ((d >= -60.0) && (d <= -55.0)) -> { longitude = (d - 60.0) * 60.0; "m" }
+        ((d >= 65.0) && (d <= 70.0)) || ((d >= -55.0) && (d <= -50.0)) -> { longitude = (d - 65.0) * 60.0; "n" }
+        ((d >= 70.0) && (d <= 75.0)) || ((d >= -50.0) && (d <= -45.0)) -> { longitude = (d - 70.0) * 60.0; "o" }
+        ((d >= 75.0) && (d <= 80.0)) || ((d >= -45.0) && (d <= -40.0)) -> { longitude = (d - 75.0) * 60.0; "p" }
+        ((d >= 80.0) && (d <= 85.0)) || ((d >= -40.0) && (d <= -35.0)) -> { longitude = (d - 80.0) * 60.0; "q" }
+        ((d >= 85.0) && (d <= 90.0)) || ((d >= -35.0) && (d <= -30.0)) -> { longitude = (d - 85.0) * 60.0; "r" }
+        ((d >= 90.0) && (d <= 95.0)) || ((d >= -30.0) && (d <= -25.0)) -> { longitude = (d - 90.0) * 60.0; "s" }
+        ((d >= 95.0) && (d <= 100.0)) || ((d >= -25.0) && (d <= -20.0)) -> { longitude = (d - 95.0) * 60.0; "t" }
+        ((d >= 100.0) && (d <= 105.0)) || ((d >= -20.0) && (d <= -15.0)) -> { longitude = (d - 100.0) * 60.0; "u" }
+        ((d >= 105.0) && (d <= 110.0)) || ((d >= -15.0) && (d <= -10.0)) -> { longitude = (d - 105.0) * 60.0; "v" }
+        ((d >= 110.0) && (d <= 115.0)) || ((d >= -10.0) && (d <= -5.0)) -> { longitude = (d - 110.0) * 60.0; "w" }
+        ((d >= 115.0) && (d <= 120.0)) || ((d >= -5.0) && (d <= 0.0)) -> { longitude = (d - 115.0) * 60.0; "x" }
+        else -> { longitude = 0.0; " " }
+    }
+    val str4 = when {
+        ((longitude >= 0.0) && (longitude <= 30.0)) || ((longitude >= -300.0) && (longitude <= -270.0)) -> "0"
+        ((longitude >= 30.0) && (longitude <= 60.0)) || ((longitude >= -270.0) && (longitude <= -240.0)) -> "1"
+        ((longitude >= 60.0) && (longitude <= 90.0)) || ((longitude >= -240.0) && (longitude <= -210.0)) -> "2"
+        ((longitude >= 90.0) && (longitude <= 120.0)) || ((longitude >= -210.0) && (longitude <= -180.0)) -> "3"
+        ((longitude >= 120.0) && (longitude <= 150.0)) || ((longitude >= -180.0) && (longitude <= -150.0)) -> "4"
+        ((longitude >= 150.0) && (longitude <= 180.0)) || ((longitude >= -150.0) && (longitude <= -120.0)) -> "5"
+        ((longitude >= 180.0) && (longitude <= 210.0)) || ((longitude >= -120.0) && (longitude <= -90.0)) -> "6"
+        ((longitude >= 210.0) && (longitude <= 240.0)) || ((longitude >= -90.0) && (longitude <= -60.0)) -> "7"
+        ((longitude >= 240.0) && (longitude <= 270.0)) || ((longitude >= -60.0) && (longitude <= -30.0)) -> "8"
+        ((longitude >= 270.0) && (longitude <= 300.0)) || ((longitude >= -30.0) && (longitude <= 0.0)) -> "9"
+        else -> " "
+    }
+    return listOf(str, str2, str3, str4)
+}
+
+// 照搬 612-914 行: 纬度 -> (10°区字母, 1°数字, 1'字母, 15"数字)
+private fun encodeLat(inputLat: Double): List<String> {
+    var latitude = inputLat
+    var d2 = 0.0
+    var d3 = 0.0
+    val str5 = when {
+        (latitude >= -90.0) && (latitude <= -80.0) -> { d2 = latitude + 90.0; "A" }
+        (latitude >= -80.0) && (latitude <= -70.0) -> { d2 = latitude + 80.0; "B" }
+        (latitude >= -70.0) && (latitude <= -60.0) -> { d2 = latitude + 70.0; "C" }
+        (latitude >= -60.0) && (latitude <= -50.0) -> { d2 = latitude + 60.0; "D" }
+        (latitude >= -50.0) && (latitude <= -40.0) -> { d2 = latitude + 50.0; "E" }
+        (latitude >= -40.0) && (latitude <= -30.0) -> { d2 = latitude + 40.0; "F" }
+        (latitude >= -30.0) && (latitude <= -20.0) -> { d2 = latitude + 30.0; "G" }
+        (latitude >= -20.0) && (latitude <= -10.0) -> { d2 = latitude + 20.0; "H" }
+        (latitude >= -10.0) && (latitude <= 0.0) -> { d2 = latitude + 10.0; "I" }
+        (latitude >= 0.0) && (latitude <= 10.0) -> { d2 = latitude; "J" }
+        (latitude >= 10.0) && (latitude <= 20.0) -> { d2 = latitude - 10.0; "K" }
+        (latitude >= 20.0) && (latitude <= 30.0) -> { d2 = latitude - 20.0; "L" }
+        (latitude >= 30.0) && (latitude <= 40.0) -> { d2 = latitude - 30.0; "M" }
+        (latitude >= 40.0) && (latitude <= 50.0) -> { d2 = latitude - 40.0; "N" }
+        (latitude >= 50.0) && (latitude <= 60.0) -> { d2 = latitude - 50.0; "O" }
+        (latitude >= 60.0) && (latitude <= 70.0) -> { d2 = latitude - 60.0; "P" }
+        (latitude >= 70.0) && (latitude <= 80.0) -> { d2 = latitude - 70.0; "Q" }
+        (latitude >= 80.0) && (latitude <= 90.0) -> { d2 = latitude - 80.0; "R" }
+        else -> { d2 = 0.0; " " }
+    }
+    var str6 = " "
+    when {
+        ((d2 >= 0.0) && (d2 <= 1.0)) || ((d2 >= -10.0) && (d2 <= -9.0)) -> { d3 = d2 * 60.0; str6 = "0" }
+        ((d2 >= 1.0) && (d2 <= 2.0)) || ((d2 >= -9.0) && (d2 <= -8.0)) -> { d3 = (d2 - 1.0) * 60.0; str6 = "1" }
+        ((d2 >= 2.0) && (d2 <= 3.0)) || ((d2 >= -8.0) && (d2 <= -7.0)) -> { d3 = (d2 - 2.0) * 60.0; str6 = "2" }
+        ((d2 >= 3.0) && (d2 <= 4.0)) || ((d2 >= -7.0) && (d2 <= -6.0)) -> { d3 = (d2 - 3.0) * 60.0; str6 = "3" }
+        ((d2 >= 4.0) && (d2 <= 5.0)) || ((d2 >= -6.0) && (d2 <= -5.0)) -> { d3 = (d2 - 4.0) * 60.0; str6 = "4" }
+        ((d2 >= 5.0) && (d2 <= 6.0)) || ((d2 >= -5.0) && (d2 <= -4.0)) -> { d3 = (d2 - 5.0) * 60.0; str6 = "5" }
+        ((d2 >= 6.0) && (d2 <= 7.0)) || ((d2 >= -4.0) && (d2 <= -3.0)) -> { d3 = (d2 - 6.0) * 60.0; str6 = "6" }
+        ((d2 >= 7.0) && (d2 <= 8.0)) || ((d2 >= -3.0) && (d2 <= -2.0)) -> { d3 = (d2 - 7.0) * 60.0; str6 = "7" }
+        ((d2 >= 8.0) && (d2 <= 9.0)) || ((d2 >= -2.0) && (d2 <= -1.0)) -> { d3 = (d2 - 8.0) * 60.0; str6 = "8" }
+        ((d2 >= 9.0) && (d2 <= 10.0)) || ((d2 >= -1.0) && (d2 <= 0.0)) -> { d3 = (d2 - 9.0) * 60.0; str6 = "9" }
+    }
+    val str38 = when {
+        ((d3 >= 0.0) && (d3 <= 2.5)) || ((d3 >= -60.0) && (d3 <= -57.5)) -> { d2 = d3 * 60.0; "a" }
+        ((d3 >= 2.5) && (d3 <= 5.0)) || ((d3 >= -57.5) && (d3 <= -55.0)) -> { d2 = (d3 - 2.5) * 60.0; "b" }
+        ((d3 >= 5.0) && (d3 <= 7.5)) || ((d3 >= -55.0) && (d3 <= -52.5)) -> { d2 = (d3 - 5.0) * 60.0; "c" }
+        ((d3 >= 7.5) && (d3 <= 10.0)) || ((d3 >= -52.5) && (d3 <= -50.0)) -> { d2 = (d3 - 7.5) * 60.0; "d" }
+        ((d3 >= 10.0) && (d3 <= 12.5)) || ((d3 >= -50.0) && (d3 <= -47.5)) -> { d2 = (d3 - 10.0) * 60.0; "e" }
+        ((d3 >= 12.5) && (d3 <= 15.0)) || ((d3 >= -47.5) && (d3 <= -45.0)) -> { d2 = (d3 - 12.5) * 60.0; "f" }
+        ((d3 >= 15.0) && (d3 <= 17.5)) || ((d3 >= -45.0) && (d3 <= -42.5)) -> { d2 = (d3 - 15.0) * 60.0; "g" }
+        ((d3 >= 17.5) && (d3 <= 20.0)) || ((d3 >= -42.5) && (d3 <= -40.0)) -> { d2 = (d3 - 17.5) * 60.0; "h" }
+        ((d3 >= 20.0) && (d3 <= 22.5)) || ((d3 >= -40.0) && (d3 <= -37.5)) -> { d2 = (d3 - 20.0) * 60.0; "i" }
+        ((d3 >= 22.5) && (d3 <= 25.0)) || ((d3 >= -37.5) && (d3 <= -35.0)) -> { d2 = (d3 - 22.5) * 60.0; "j" }
+        ((d3 >= 25.0) && (d3 <= 27.5)) || ((d3 >= -35.0) && (d3 <= -32.5)) -> { d2 = (d3 - 25.0) * 60.0; "k" }
+        ((d3 >= 27.5) && (d3 <= 30.0)) || ((d3 >= -32.5) && (d3 <= -30.0)) -> { d2 = (d3 - 27.5) * 60.0; "l" }
+        ((d3 >= 30.0) && (d3 <= 32.5)) || ((d3 >= -30.0) && (d3 <= -27.5)) -> { d2 = (d3 - 30.0) * 60.0; "m" }
+        ((d3 >= 32.5) && (d3 <= 35.0)) || ((d3 >= -27.5) && (d3 <= -25.0)) -> { d2 = (d3 - 32.5) * 60.0; "n" }
+        ((d3 >= 35.0) && (d3 <= 37.5)) || ((d3 >= -25.0) && (d3 <= -22.5)) -> { d2 = (d3 - 35.0) * 60.0; "o" }
+        ((d3 >= 37.5) && (d3 <= 40.0)) || ((d3 >= -22.5) && (d3 <= -20.0)) -> { d2 = (d3 - 37.5) * 60.0; "p" }
+        ((d3 >= 40.0) && (d3 <= 42.5)) || ((d3 >= -20.0) && (d3 <= -17.5)) -> { d2 = (d3 - 40.0) * 60.0; "q" }
+        ((d3 >= 42.5) && (d3 <= 45.0)) || ((d3 >= -17.5) && (d3 <= -15.0)) -> { d2 = (d3 - 42.5) * 60.0; "r" }
+        ((d3 >= 45.0) && (d3 <= 47.5)) || ((d3 >= -15.0) && (d3 <= -12.5)) -> { d2 = (d3 - 45.0) * 60.0; "s" }
+        ((d3 >= 47.5) && (d3 <= 50.0)) || ((d3 >= -12.5) && (d3 <= -10.0)) -> { d2 = (d3 - 47.5) * 60.0; "t" }
+        ((d3 >= 50.0) && (d3 <= 52.5)) || ((d3 >= -10.0) && (d3 <= -7.5)) -> { d2 = (d3 - 50.0) * 60.0; "u" }
+        ((d3 >= 52.5) && (d3 <= 55.0)) || ((d3 >= -7.5) && (d3 <= -5.0)) -> { d2 = (d3 - 52.5) * 60.0; "v" }
+        ((d3 >= 55.0) && (d3 <= 57.5)) || ((d3 >= -5.0) && (d3 <= -2.5)) -> { d2 = (d3 - 55.0) * 60.0; "w" }
+        ((d3 >= 57.5) && (d3 <= 60.0)) || ((d3 >= -2.5) && (d3 <= 0.0)) -> { d2 = (d3 - 57.5) * 60.0; "x" }
+        else -> { d2 = 0.0; " " }
+    }
+    val str9 = when {
+        ((d2 >= 0.0) && (d2 <= 15.0)) || ((d2 >= -150.0) && (d2 <= -135.0)) -> "0"
+        ((d2 >= 15.0) && (d2 <= 30.0)) || ((d2 >= -135.0) && (d2 <= -120.0)) -> "1"
+        ((d2 >= 30.0) && (d2 <= 45.0)) || ((d2 >= -120.0) && (d2 <= -105.0)) -> "2"
+        ((d2 >= 45.0) && (d2 <= 60.0)) || ((d2 >= -105.0) && (d2 <= -90.0)) -> "3"
+        ((d2 >= 60.0) && (d2 <= 75.0)) || ((d2 >= -90.0) && (d2 <= -75.0)) -> "4"
+        ((d2 >= 75.0) && (d2 <= 90.0)) || ((d2 >= -75.0) && (d2 <= -60.0)) -> "5"
+        ((d2 >= 90.0) && (d2 <= 105.0)) || ((d2 >= -60.0) && (d2 <= -45.0)) -> "6"
+        ((d2 >= 105.0) && (d2 <= 120.0)) || ((d2 >= -45.0) && (d2 <= -30.0)) -> "7"
+        ((d2 >= 120.0) && (d2 <= 135.0)) || ((d2 >= -30.0) && (d2 <= -15.0)) -> "8"
+        ((d2 >= 135.0) && (d2 <= 150.0)) || ((d2 >= -15.0) && (d2 <= 0.0)) -> "9"
+        else -> " "
+    }
+    return listOf(str5, str6, str38, str9)
+}
+
+/**
+ * 照搬 917-1283 行: 九宫格 parseInt3 五分支(内部/西界/东界/北界/南界 + 四角)。
+ * 返回 9 格文本: [上左, 上中, 上右, 左中, 中央, 右中, 下左, 下中, 下右]。
+ */
+private fun buildGrids(str: String, str5: String, str2: String, str6: String, str3: String, str38: String): List<String> {
+    val parseInt = str2.toInt()
+    val parseInt2 = str6.toInt()
+    val str39 = str + str5
+    val str40 = str2 + str6
+    val parseInt3 = str40.toInt()
+    val str41 = str39 + str40
+    val g = MutableList(9) { "" }
+    fun fmt2(n: Int) = if (n <= 9) "0$n" else n.toString()
+    if ((parseInt > 0) && (parseInt < 9) && (parseInt2 > 0) && (parseInt2 < 9)) {
+        // 内部: 数字对 ±1
+        val i7 = parseInt3 + 1
+        val i8 = i7 - 10
+        val valueOf9 = fmt2(i8)
+        val str11 = i7.toString()
+        val valueOf18 = (i7 + 10).toString()
+        val i9 = parseInt3 - 10
+        val valueOf10 = fmt2(i9)
+        val valueOf19 = (parseInt3 + 10).toString()
+        val i10 = parseInt3 - 1
+        val i11 = i10 - 10
+        val valueOf11 = fmt2(i11)
+        val str14 = i10.toString()
+        val str15 = (i10 + 10).toString()
+        g[0] = str39 + valueOf9
+        g[1] = str39 + str11
+        g[2] = str39 + valueOf18
+        g[3] = str39 + valueOf10
+        g[4] = str41
+        g[5] = str39 + valueOf19
+        g[6] = str39 + valueOf11
+        g[7] = str39 + str14
+        g[8] = str39 + str15
+    } else if ((parseInt == 0) && (parseInt2 > 0) && (parseInt2 < 9)) {
+        // 西边界: 经度 0 -> 9, 经度字母 -1
+        val str43 = (str[0] - 1).toString() + str5
+        val str44 = "9" + (parseInt2 + 1)
+        val i12 = parseInt3 + 1
+        val valueOf7 = fmt2(i12)
+        val str12 = (i12 + 10).toString()
+        val sb4 = "9" + parseInt2
+        val valueOf20 = (parseInt3 + 10).toString()
+        val str46 = "9" + (parseInt2 - 1)
+        val i13 = parseInt3 - 1
+        val valueOf8 = fmt2(i13)
+        val str15 = (i13 + 10).toString()
+        g[0] = str43 + str44
+        g[1] = str39 + valueOf7
+        g[2] = str39 + str12
+        g[3] = str43 + sb4
+        g[4] = str41
+        g[5] = str39 + valueOf20
+        g[6] = str43 + str46
+        g[7] = str39 + valueOf8
+        g[8] = str39 + str15
+    } else if ((parseInt == 9) && (parseInt2 > 0) && (parseInt2 < 9)) {
+        // 东边界: 经度 9 -> 0, 经度字母 +1
+        val str47 = (str[0] + 1).toString() + str5
+        val i14 = parseInt3 + 1
+        val valueOf21 = (i14 - 10).toString()
+        val valueOf22 = i14.toString()
+        val str48 = "0" + (parseInt2 + 1)
+        val valueOf23 = (parseInt3 - 10).toString()
+        val str49 = "0" + parseInt2
+        val i15 = parseInt3 - 1
+        val valueOf24 = (i15 - 10).toString()
+        val valueOf25 = i15.toString()
+        val str15 = "0" + (parseInt2 - 1)
+        g[0] = str39 + valueOf21
+        g[1] = str39 + valueOf22
+        g[2] = str47 + str48
+        g[3] = str39 + valueOf23
+        g[4] = str41
+        g[5] = str47 + str49
+        g[6] = str39 + valueOf24
+        g[7] = str39 + valueOf25
+        g[8] = str47 + str15
+    } else if ((parseInt < 9) && (parseInt > 0) && (parseInt2 == 9)) {
+        // 北边界: 纬度 9 -> 0, 纬度字母 +1
+        val str50 = str + (str5[0] + 1).toString()
+        val i16 = parseInt3 - 9
+        val i17 = i16 - 10
+        val valueOf4 = fmt2(i17)
+        val valueOf26 = i16.toString()
+        val valueOf27 = (i16 + 10).toString()
+        val i18 = parseInt3 - 10
+        val valueOf5 = fmt2(i18)
+        val valueOf28 = (parseInt3 + 10).toString()
+        val i19 = parseInt3 - 1
+        val i20 = i19 - 10
+        val valueOf6 = fmt2(i20)
+        val str14 = i19.toString()
+        val str15 = (i19 + 10).toString()
+        g[0] = str39 + valueOf4
+        g[1] = str50 + valueOf26
+        g[2] = str39 + valueOf27
+        g[3] = str39 + valueOf5
+        g[4] = str41
+        g[5] = str39 + valueOf28
+        g[6] = str39 + valueOf6
+        g[7] = str39 + str14
+        g[8] = str39 + str15
+    } else if ((parseInt < 9) && (parseInt > 0) && (parseInt2 == 0)) {
+        // 南边界: 纬度 0 -> 9, 纬度字母 -1
+        val str52 = str + (str5[0] - 1).toString()
+        val i21 = parseInt3 + 1
+        val i22 = i21 - 10
+        val valueOf = fmt2(i22)
+        val valueOf29 = i21.toString()
+        val valueOf30 = (i21 + 10).toString()
+        val i23 = parseInt3 - 10
+        val valueOf2 = fmt2(i23)
+        val valueOf31 = (parseInt3 + 10).toString()
+        val i24 = parseInt3 - 1
+        val valueOf3 = fmt2(i24)
+        val str14 = (i24 + 10).toString()
+        val str15 = (i24 + 20).toString()
+        g[0] = str39 + valueOf
+        g[1] = str39 + valueOf29
+        g[2] = str39 + valueOf30
+        g[3] = str39 + valueOf2
+        g[4] = str41
+        g[5] = str39 + valueOf31
+        g[6] = str52 + valueOf3
+        g[7] = str52 + str14
+        g[8] = str52 + str15
+    } else if (parseInt3 == 0) {
+        // 四角 00: 经纬度数字均 -1 进位
+        val v32 = (str[0] - 1).toString()
+        val v33 = (str5[0] - 1).toString()
+        g[0] = v32 + str5 + "91"
+        g[1] = str39 + "01"
+        g[2] = str39 + "11"
+        g[3] = v32 + str5 + "90"
+        g[4] = str41
+        g[5] = v32 + str5 + "10"
+        g[6] = v32 + v33 + "99"
+        g[7] = str + v33 + "09"
+        g[8] = str + v33 + "19"
+    } else if (parseInt3 == 9) {
+        // 四角 09: 经度 -1, 纬度 +1
+        val v34 = (str[0] - 1).toString()
+        val v35 = (str5[0] + 1).toString()
+        g[0] = v34 + v35 + "90"
+        g[1] = str + v35 + "00"
+        g[2] = str + v35 + "10"
+        g[3] = v34 + str5 + "99"
+        g[4] = str41
+        g[5] = v34 + str5 + "19"
+        g[6] = v34 + str5 + "98"
+        g[7] = v34 + str5 + "08"
+        g[8] = v34 + str5 + "18"
+    } else if (parseInt3 == 99) {
+        // 四角 99: 经纬度数字均 +1 进位
+        val v36 = (str[0] + 1).toString()
+        val v37 = (str5[0] + 1).toString()
+        g[0] = str + v37 + "80"
+        g[1] = str + v37 + "90"
+        g[2] = v36 + v37 + "00"
+        g[3] = str39 + "89"
+        g[4] = str41
+        g[5] = v36 + str5 + "09"
+        g[6] = str39 + "88"
+        g[7] = str39 + "98"
+        g[8] = v36 + str5 + "08"
+    } else if (parseInt3 == 90) {
+        // 四角 90: 经度 +1, 纬度 -1
+        val v38 = (str[0] + 1).toString()
+        val v39 = (str5[0] - 1).toString()
+        g[0] = str39 + "81"
+        g[1] = str39 + "91"
+        g[2] = v38 + str5 + "01"
+        g[3] = str39 + "80"
+        g[4] = str41
+        g[5] = v38 + str5 + "00"
+        g[6] = str + v39 + "89"
+        g[7] = str + v39 + "99"
+        g[8] = v38 + v39 + "09"
+    }
+    return g
+}

feature/roaming/src/test/java/com/rtbishop/look4sat/feature/roaming/RoamingStateTest.kt

@@ -0,0 +1,124 @@
+/*
+ * Look4Sat. Amateur radio satellite tracker and pass predictor.
+ * Copyright (C) 2019-2026 Arty Bishop and contributors.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+package com.rtbishop.look4sat.feature.roaming
+
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+class RoamingStateTest {
+
+    // 用户实测坐标 (QTH定位器 2.0 成品截图): 22.314066 / 108.706575
+    private fun stateOf(lat: Double, lon: Double) =
+        roamingStateFromLocation(lat, lon, System.currentTimeMillis(), "21:")
+
+    @Test
+    fun `user coordinates produce OL42ih45`() {
+        val state = stateOf(22.314066, 108.706575)
+        assertEquals("OL42ih45", state.loc)
+    }
+
+    @Test
+    fun `red marker from ih pair matches reference lookup`() {
+        val state = stateOf(22.314066, 108.706575)
+        // 成品查表: 经度第3对 'i' -> leftMargin 65dp, 纬度第3对 'h' -> topMargin 137dp
+        assertEquals(65, state.markerLeft)
+        assertEquals(137, state.markerTop)
+    }
+
+    @Test
+    fun `grid nine from OL42 matches reference`() {
+        val state = stateOf(22.314066, 108.706575)
+        val expected = listOf(
+            "OL33", "OL43", "OL53",
+            "OL32", "OL42", "OL52",
+            "OL31", "OL41", "OL51"
+        )
+        assertEquals(expected, state.grids)
+    }
+
+    @Test
+    fun `latitude dms formatting matches reference`() {
+        val state = stateOf(22.314066, 108.706575)
+        assertEquals("纬度  22° 18' 50\" N", state.latLabel)
+        assertEquals("22.314066° ", state.latValue)
+        assertEquals("经度 108° 42' 23\" E", state.lonLabel)
+        assertEquals("108.706575° ", state.lonValue)
+    }
+
+    @Test
+    fun `time is hour prefix plus fix minutes`() {
+        // fixTime = 2026-08-03 21:12:13 UTC+8 -> minutes 12
+        val fix = 1785820333000L // 2026-08-03 21:12:13 +0800
+        val state = roamingStateFromLocation(22.314066, 108.706575, fix, "21:")
+        assertEquals("21:12", state.time)
+    }
+
+    @Test
+    fun `west edge borrows lon letter`() {
+        // 经度 0.5 纬度 22.314066: 数字对 02, 西边界 parseInt==0
+        val state = stateOf(22.314066, 0.5)
+        assertEquals(8, state.loc.length)
+        // 左列经度 0->9, 经度字母 J-1=I: IL92
+        assertEquals("IL92", state.grids[3])
+    }
+
+    @Test
+    fun `north edge carries lat letter`() {
+        // 纬度 29.5 经度 108.706575: 数字对 49? -> 纬度数字 9 -> 北边界
+        val state = stateOf(29.5, 108.706575)
+        assertEquals(8, state.loc.length)
+        // 上排纬度 +1 -> 0, 纬度字母 +1 (M)
+        assertEquals("OM40", state.grids[1])
+    }
+
+    @Test
+    fun `east edge carries lon letter`() {
+        // 经度 119.5 纬度 22.314066: 经度数字 9 -> 东边界
+        val state = stateOf(22.314066, 119.5)
+        assertEquals(8, state.loc.length)
+        // 右上 经度 9->0, 经度字母 O+1=P, 纬度 2+1=3: PL03
+        assertEquals("PL03", state.grids[2])
+    }
+
+    @Test
+    fun `south edge borrows lat letter`() {
+        // 纬度 0.5 经度 108.706575: 纬度数字 0 -> 南边界
+        val state = stateOf(0.5, 108.706575)
+        assertEquals(8, state.loc.length)
+        // 下中 纬度 0->9, 纬度字母 J-1=I: OI49
+        assertEquals("OI49", state.grids[7])
+    }
+
+    @Test
+    fun `boundary values wrap like reference`() {
+        // (90, 180) -> RR99xx99 (成品区间查表行为)
+        val state = stateOf(90.0, 180.0)
+        assertEquals("RR99xx99", state.loc)
+    }
+
+    @Test
+    fun `gps state after fix matches showLocation`() {
+        val state = stateOf(22.314066, 108.706575)
+        assertEquals(true, state.gpsOn)
+        assertEquals(false, state.gpsOff)
+        assertEquals(false, state.showSettings)
+        assertEquals(false, state.showProgress)
+        assertEquals(false, state.showNotice)
+        assertEquals(true, state.showDate)
+    }
+}

feature/settings/src/main/java/com/rtbishop/look4sat/feature/settings/SettingsDialog.kt

@@ -30,6 +30,8 @@ import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.material3.FilterChip
+import androidx.compose.material3.Icon
+import androidx.compose.material3.IconButton
 import androidx.compose.material3.OutlinedTextField
 import androidx.compose.material3.Switch
 import androidx.compose.material3.Text
@@ -41,11 +43,13 @@ import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import com.rtbishop.look4sat.core.domain.model.RCSettings
+import com.rtbishop.look4sat.core.domain.source.Sources
 import com.rtbishop.look4sat.core.domain.model.RadioControlSettings
 import com.rtbishop.look4sat.core.presentation.CardButton
 import com.rtbishop.look4sat.core.presentation.LocalSpacing
@@ -203,6 +207,17 @@ fun DataSourcesDialog(
                 singleLine = true,
                 modifier = Modifier.fillMaxWidth(),
                 enabled = isEnabledCustomTle.value,
+                trailingIcon = {
+                    IconButton(
+                        onClick = { urlTle.value = Sources.defaultTleUrl },
+                        enabled = isEnabledCustomTle.value
+                    ) {
+                        Icon(
+                            painter = painterResource(id = R.drawable.ic_reset),
+                            contentDescription = stringResource(id = R.string.prefs_data_reset_url)
+                        )
+                    }
+                },
             )
             Spacer(modifier = Modifier.height(6.dp))
             Row(
@@ -232,6 +247,17 @@ fun DataSourcesDialog(
                 singleLine = true,
                 modifier = Modifier.fillMaxWidth(),
                 enabled = isEnabledCustomTransceivers.value,
+                trailingIcon = {
+                    IconButton(
+                        onClick = { urlTransceivers.value = Sources.defaultTransceiversUrl },
+                        enabled = isEnabledCustomTransceivers.value
+                    ) {
+                        Icon(
+                            painter = painterResource(id = R.drawable.ic_reset),
+                            contentDescription = stringResource(id = R.string.prefs_data_reset_url)
+                        )
+                    }
+                },
             )
             Spacer(modifier = Modifier.height(12.dp))
         }

feature/settings/src/main/java/com/rtbishop/look4sat/feature/settings/SettingsScreen.kt

@@ -22,15 +22,26 @@ import android.os.Build
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
 import androidx.compose.foundation.clickable
+import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
 import androidx.compose.foundation.layout.fillMaxHeight
+import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
 import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.heightIn
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.shape.CircleShape
 import androidx.compose.foundation.layout.width
+import androidx.compose.foundation.gestures.detectDragGestures
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.lazy.LazyColumn
+import androidx.compose.foundation.lazy.rememberLazyListState
+import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.foundation.lazy.grid.GridCells
 import androidx.compose.foundation.lazy.grid.GridItemSpan
 import androidx.compose.foundation.lazy.grid.LazyVerticalGrid
@@ -40,15 +51,28 @@ import androidx.compose.material3.LinearProgressIndicator
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Switch
 import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableIntStateOf
+import androidx.compose.runtime.mutableStateListOf
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.Stable
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.saveable.rememberSaveable
+import kotlin.math.roundToInt
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
+import androidx.compose.ui.zIndex
+import androidx.compose.ui.graphics.graphicsLayer
+import androidx.compose.ui.input.pointer.pointerInput
+import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.platform.LocalContext
@@ -299,6 +323,15 @@ private fun SettingsScreen(uiState: SettingsState, onAction: (SettingsAction) ->
                 )
             }
             item { OtherCard(uiState.otherSettings, onAction) }
+            item {
+                UiSettingsCard(
+                    hiddenScreens = uiState.otherSettings.hiddenScreens,
+                    screenOrder = uiState.otherSettings.screenOrder,
+                    onToggle = { name -> onAction(SettingsAction.ToggleScreen(name)) },
+                    onReorder = { order -> onAction(SettingsAction.ReorderScreens(order)) },
+                    onResetOrder = { onAction(SettingsAction.ResetScreenOrder) }
+                )
+            }
             item { CardCredits() }
         }
     }
@@ -339,6 +372,8 @@ private fun LocationCard(
             Row(horizontalArrangement = Arrangement.SpaceBetween, modifier = Modifier.fillMaxWidth()) {
                 Text(text = "Lat: ${settings.stationPos.latitude}°")
                 Text(text = "Lon: ${settings.stationPos.longitude}°")
+            }
+            Row(horizontalArrangement = Arrangement.SpaceBetween, modifier = Modifier.fillMaxWidth()) {
                 Text(text = "Qth: ${settings.stationPos.qthLocator}")
             }
             Spacer(modifier = Modifier.height(1.dp))
@@ -484,11 +519,12 @@ private fun OtherCardPreview() = MainTheme {
 @Composable
 private fun OtherCard(settings: OtherSettings, onAction: (SettingsAction) -> Unit) {
     ElevatedCard(
-        modifier = Modifier
-            .fillMaxWidth()
-            .height(268.dp)
+        modifier = Modifier.fillMaxWidth()
     ) {
-        Column(modifier = Modifier.padding(horizontal = 8.dp, vertical = 4.dp)) {
+        Column(
+            modifier = Modifier.padding(horizontal = 8.dp, vertical = 4.dp),
+            verticalArrangement = Arrangement.spacedBy(4.dp)
+        ) {
             Text(
                 text = stringResource(id = R.string.prefs_other_title),
                 color = MaterialTheme.colorScheme.primary
@@ -512,8 +548,152 @@ private fun OtherCard(settings: OtherSettings, onAction: (SettingsAction) -> Uni
     }
 }
 
+/**
+ * UI 设置卡片: 控制底部菜单栏各页面显示/隐藏。
+ * 顺序固定(卫星/过境/雷达/匹配/漫游/地图/设置), 关闭后其余自动靠拢;
+ * "设置"页固定显示(防止失去设置入口)。
+ */
 @Composable
-private fun SwitchRow(labelResId: Int, checked: Boolean, onCheckedChange: (Boolean) -> Unit) {
+private fun UiSettingsCard(
+    hiddenScreens: List<String>,
+    screenOrder: List<String>,
+    onToggle: (String) -> Unit,
+    onReorder: (List<String>) -> Unit,
+    onResetOrder: () -> Unit
+) {
+    val screens = listOf(
+        R.string.nav_sat to "Satellites",
+        R.string.nav_pass to "Passes",
+        R.string.nav_radar to "Radar",
+        R.string.nav_mutual to "Mutual",
+        R.string.nav_roaming to "Roaming",
+        R.string.nav_cw to "CwDecode",
+        R.string.nav_map to "Map",
+        R.string.nav_prefs to "Settings"
+    ) // name 必须与 Screen.screenId 一致 (R8 安全)
+    ElevatedCard(modifier = Modifier.fillMaxWidth()) {
+        Column(
+            modifier = Modifier.padding(horizontal = 8.dp, vertical = 4.dp),
+            verticalArrangement = Arrangement.spacedBy(4.dp)
+        ) {
+            Text(
+                text = stringResource(id = R.string.prefs_ui_title),
+                color = MaterialTheme.colorScheme.primary
+            )
+            screens.forEach { (labelRes, name) ->
+                if (name == "Settings") {
+                    // 设置页固定显示, 开关禁用
+                    SwitchRow(labelRes, true, null)
+                } else {
+                    SwitchRow(labelRes, name !in hiddenScreens) {
+                        onToggle(name)
+                    }
+                }
+            }
+            Text(
+                text = stringResource(id = R.string.prefs_ui_order_title),
+                color = MaterialTheme.colorScheme.primary
+            )
+            DragOrderList(screens = screens, screenOrder = screenOrder, onReorder = onReorder)
+            TextButton(onClick = onResetOrder) {
+                Text(text = stringResource(id = R.string.prefs_ui_order_reset))
+            }
+        }
+    }
+}
+
+/** 页面顺序拖拽列表: 每行右侧抓手, 按住上下拖动实时换位, 松手持久化 */
+@Composable
+private fun DragOrderList(
+    screens: List<Pair<Int, String>>,
+    screenOrder: List<String>,
+    onReorder: (List<String>) -> Unit
+) {
+    val itemHeight = 48.dp
+    val itemHeightPx = with(LocalDensity.current) { itemHeight.toPx() }
+    // 按 screenOrder 排序(空 = 默认顺序); remember 以 screens 参数为 key, 持久化后重组
+    val ordered = remember(screens, screenOrder) {
+        screens.sortedBy { (_, name) ->
+            // 未知(新页面如 CwDecode 不在旧持久化顺序里): 用默认顺序位置, 再兜底最后
+            screenOrder.indexOf(name).let {
+                if (it != -1) it else com.rtbishop.look4sat.core.presentation.defaultScreenOrder.indexOf(name).let {
+                    if (it != -1) it else Int.MAX_VALUE
+                }
+            }
+        }
+    }
+    val listState = rememberLazyListState()
+    val items = remember(ordered) { mutableStateListOf<Pair<Int, String>>().apply { addAll(ordered) } }
+    var draggingIndex by remember { mutableIntStateOf(-1) }
+    var dragOffset by remember { mutableStateOf(0f) }
+
+    // 固定高度: 嵌套在 LazyVerticalGrid 内必须给有界高度, 否则无限高度约束崩溃
+    LazyColumn(
+        state = listState,
+        modifier = Modifier
+            .fillMaxWidth()
+            .height(itemHeight * items.size)
+    ) {
+        itemsIndexed(items, key = { _, s -> s.second }) { index, screen ->
+            val isDragging = draggingIndex == index
+            Row(
+                verticalAlignment = Alignment.CenterVertically,
+                modifier = Modifier
+                    .fillMaxWidth()
+                    .height(itemHeight)
+                    .zIndex(if (isDragging) 1f else 0f)
+                    .graphicsLayer { translationY = if (isDragging) dragOffset else 0f }
+                    .animateItem()
+            ) {
+                Text(
+                    text = stringResource(id = screen.first),
+                    modifier = Modifier.weight(1f)
+                )
+                Box(
+                    modifier = Modifier
+                        .size(48.dp)
+                        .padding(20.dp)
+                        .pointerInput(screen.second) {
+                            detectDragGestures(
+                                onDragStart = { draggingIndex = items.indexOf(screen) },
+                                onDrag = { change, dragAmount ->
+                                    change.consume()
+                                    dragOffset += dragAmount.y
+                                    val currentIndex = draggingIndex
+                                    val target = (currentIndex + (dragOffset / itemHeightPx).roundToInt())
+                                        .coerceIn(0, items.size - 1)
+                                    if (target != currentIndex) {
+                                        items.add(target, items.removeAt(currentIndex))
+                                        dragOffset += (currentIndex - target) * itemHeightPx
+                                        draggingIndex = target
+                                    }
+                                },
+                                onDragEnd = {
+                                    onReorder(items.map { it.second })
+                                    draggingIndex = -1
+                                    dragOffset = 0f
+                                },
+                                onDragCancel = {
+                                    draggingIndex = -1
+                                    dragOffset = 0f
+                                }
+                            )
+                        }
+                ) {
+                    // 小圆点手柄(触控区 padding 20dp 居中 -> 8dp 圆点)
+                    Box(
+                        modifier = Modifier
+                            .fillMaxSize()
+                            .background(MaterialTheme.colorScheme.onSurfaceVariant, CircleShape)
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Composable
+private fun SwitchRow(labelResId: Int, checked: Boolean, onCheckedChange: ((Boolean) -> Unit)?) {
     Row(
         horizontalArrangement = Arrangement.SpaceBetween,
         verticalAlignment = Alignment.CenterVertically,
@@ -556,15 +736,11 @@ private fun CardCreditsPreview() = MainTheme { CardCredits() }
 @Composable
 private fun CardCredits(modifier: Modifier = Modifier) {
     ElevatedCard(
-        modifier = modifier
-            .fillMaxWidth()
-            .height(268.dp)
+        modifier = modifier.fillMaxWidth()
     ) {
         Column(
-            verticalArrangement = Arrangement.SpaceBetween,
-            modifier = Modifier
-                .padding(horizontal = 8.dp, vertical = 4.dp)
-                .fillMaxHeight()
+            verticalArrangement = Arrangement.spacedBy(8.dp),
+            modifier = Modifier.padding(horizontal = 8.dp, vertical = 4.dp)
         ) {
             Text(
                 text = stringResource(id = R.string.prefs_outro_title),
@@ -573,6 +749,8 @@ private fun CardCredits(modifier: Modifier = Modifier) {
             Text(
                 text = stringResource(id = R.string.prefs_outro_thanks)
             )
+            // 感谢列表与保修声明之间保留约两行间距 (用户要求)
+            Spacer(modifier = Modifier.height(24.dp))
             Text(
                 text = stringResource(id = R.string.prefs_outro_license),
                 color = MaterialTheme.colorScheme.primary
@@ -588,7 +766,7 @@ private fun TopCard(onClick: () -> Unit, modifier: Modifier = Modifier, version:
             horizontalArrangement = Arrangement.spacedBy(12.dp),
             verticalAlignment = Alignment.CenterVertically,
             modifier = Modifier
-                .height(48.dp)
+                .heightIn(min = 48.dp)
                 .clickable { onClick() }) {
             Spacer(Modifier)
             Icon(
@@ -603,7 +781,6 @@ private fun TopCard(onClick: () -> Unit, modifier: Modifier = Modifier, version:
                 modifier = Modifier
                     .weight(1f)
                     .padding(end = 6.dp)
-                    .infiniteMarquee()
             )
         }
     }

feature/settings/src/main/java/com/rtbishop/look4sat/feature/settings/SettingsState.kt

@@ -64,6 +64,12 @@ sealed interface SettingsAction {
     data class ToggleSensor(val value: Boolean) : SettingsAction
     data class ToggleLightTheme(val value: Boolean) : SettingsAction
     data class ToggleNightMode(val value: Boolean) : SettingsAction
+    // UI 设置: 切换底部导航栏页面的隐藏状态(Screen simpleName)
+    data class ToggleScreen(val screenName: String) : SettingsAction
+    // UI 设置: 更新页面顺序
+    data class ReorderScreens(val order: List<String>) : SettingsAction
+    // UI 设置: 重置为默认顺序
+    data object ResetScreenOrder : SettingsAction
 
     // Remote control
     data class UpdateRC(val settings: RCSettings) : SettingsAction

feature/settings/src/main/java/com/rtbishop/look4sat/feature/settings/SettingsViewModel.kt

@@ -121,6 +121,13 @@ class SettingsViewModel(
             is SettingsAction.ToggleSensor -> settingsRepo.updateOtherSettings { it.copy(stateOfSensors = action.value) }
             is SettingsAction.ToggleLightTheme -> settingsRepo.updateOtherSettings { it.copy(stateOfLightTheme = action.value) }
             is SettingsAction.ToggleNightMode -> settingsRepo.updateOtherSettings { it.copy(stateOfNightMode = action.value) }
+            is SettingsAction.ToggleScreen -> settingsRepo.updateOtherSettings { current ->
+                val hidden = current.hiddenScreens.toMutableList()
+                if (action.screenName in hidden) hidden.remove(action.screenName) else hidden.add(action.screenName)
+                current.copy(hiddenScreens = hidden)
+            }
+            is SettingsAction.ReorderScreens -> settingsRepo.updateOtherSettings { it.copy(screenOrder = action.order) }
+            SettingsAction.ResetScreenOrder -> settingsRepo.updateOtherSettings { it.copy(screenOrder = emptyList()) }
             // Remote control & data sources
             is SettingsAction.UpdateRC -> settingsRepo.updateRCSettings(action.settings)
             is SettingsAction.UpdateRadioControl -> settingsRepo.updateRadioControlSettings(action.settings)

gradle/libs.versions.toml

@@ -1,8 +1,8 @@
 [versions]
 #noinspection UnusedVersionCatalogEntry
-appVersionCode = "443"
+appVersionCode = "450"
 #noinspection UnusedVersionCatalogEntry
-appVersionName = "4.4.3"
+appVersionName = "4.5.0"
 #noinspection UnusedVersionCatalogEntry
 compileSdk = "37"
 #noinspection UnusedVersionCatalogEntry
@@ -11,6 +11,11 @@ minSdk = "24"
 jdkVersion = "21"
 #noinspection UnusedVersionCatalogEntry
 packageName = "com.rtbishop.look4sat"
+# Fork application ID: official app uses com.rtbishop.look4sat with a different
+# signing cert. Installing a fork with the same applicationId would conflict
+# with the official build (signature mismatch / cannot overwrite), so the fork
+# ships under its own applicationId suffix.
+applicationId = "com.rtbishop.look4sat.bg7nta"
 
 android-gradle-plugin = "9.3.1"
 

settings.gradle.kts

@@ -26,6 +26,7 @@ include(
     ":feature:mutual",
     ":feature:passes",
     ":feature:radar",
+    ":feature:roaming",
     ":feature:satellites",
     ":feature:settings"
 )