feat: upload AMSAT status reports

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

@@ -249,6 +249,7 @@ private fun PagerCard(
                         selectedUuid = uiState.transceivers.selectedUuid,
                         orbitalPos = uiState.orbitalPos,
                         cw = uiState.cw,
+                        calculatorOffsetKHz = uiState.calculatorOffsetKHz,
                         onAction = onAction,
                         requestMicPermission = requestMicPermission
                     )

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

@@ -69,7 +69,8 @@ data class RadarState(
     val mutualEndTime: Long = 0L,
     val mutualMaxElev: Double = 10.0,
     val mutualLabelA: String = "你",
-    val mutualLabelB: String = "友台"
+    val mutualLabelB: String = "友台",
+    val calculatorOffsetKHz: String = ""
 )
 
 enum class SstvStatus { Idle, Recording }
@@ -124,4 +125,7 @@ sealed interface RadarAction {
     data class CwSetToneFreq(val freq: Float) : RadarAction
     data class CwToggleExpanded(val expanded: Boolean) : RadarAction
     data class CwPermissionResult(val granted: Boolean) : RadarAction
+
+    // Calculator actions
+    data class ChangeCalculatorOffset(val offsetKHz: String) : RadarAction
 }

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

@@ -151,7 +151,13 @@ class RadarViewModel(
         transponders = allRadios.filter { it.downlinkLow != null }
         if (allRadios.isNotEmpty()) {
             val firstUuid = allRadios.first().uuid
-            _uiState.update { it.copy(transceivers = it.transceivers.copy(selectedUuid = firstUuid)) }
+            val offsetKHz = allRadios.first().catnum?.let { settingsRepo.getSatelliteOffset(it) } ?: ""
+            _uiState.update {
+                it.copy(
+                    transceivers = it.transceivers.copy(selectedUuid = firstUuid),
+                    calculatorOffsetKHz = offsetKHz
+                )
+            }
             transponders.find { it.uuid == firstUuid }?.let { trackingService.setTransponder(it) }
         }
         if (!pass.isDeepSpace) {
@@ -228,7 +234,16 @@ class RadarViewModel(
                 // Compute toggle state before the update so we don't read post-update value
                 val isTogglingOff = _uiState.value.transceivers.selectedUuid == action.uuid
                 val newUuid = if (isTogglingOff) null else action.uuid
-                _uiState.update { it.copy(transceivers = it.transceivers.copy(selectedUuid = newUuid)) }
+                val offsetKHz = if (!isTogglingOff) {
+                    transponders.find { it.uuid == action.uuid }
+                        ?.catnum?.let { settingsRepo.getSatelliteOffset(it) } ?: ""
+                } else ""
+                _uiState.update {
+                    it.copy(
+                        transceivers = it.transceivers.copy(selectedUuid = newUuid),
+                        calculatorOffsetKHz = offsetKHz
+                    )
+                }
                 // Only update the tracking service when selecting a different transponder to
                 // avoid resetting a user-adjusted TX base on re-expand
                 if (!isTogglingOff) {
@@ -296,6 +311,15 @@ class RadarViewModel(
             is RadarAction.CwToggleExpanded -> {
                 _uiState.update { it.copy(cw = it.cw.copy(isExpanded = action.expanded)) }
             }
+            is RadarAction.ChangeCalculatorOffset -> {
+                val catnum = _uiState.value.transceivers.selectedUuid?.let { uuid ->
+                    transponders.find { it.uuid == uuid }?.catnum
+                }
+                if (catnum != null) {
+                    settingsRepo.setSatelliteOffset(catnum, action.offsetKHz)
+                }
+                _uiState.update { it.copy(calculatorOffsetKHz = action.offsetKHz) }
+            }
         }
     }
 

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

@@ -18,7 +18,6 @@
 package com.rtbishop.look4sat.feature.radar
 
 import android.app.Activity
-import android.content.Context
 import android.view.LayoutInflater
 import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.animation.expandVertically
@@ -145,6 +144,7 @@ fun CalculatorPage(
     selectedUuid: String?,
     orbitalPos: OrbitalPos?,
     cw: CwSubState,
+    calculatorOffsetKHz: String = "",
     onAction: (RadarAction) -> Unit,
     requestMicPermission: () -> Unit = {},
     modifier: Modifier = Modifier
@@ -196,6 +196,8 @@ fun CalculatorPage(
         DopplerFrequencyCalculator(
             transponder = selectedTransceiver,
             orbitalPos = orbitalPos,
+            offsetKHz = calculatorOffsetKHz,
+            onOffsetChange = { onAction(RadarAction.ChangeCalculatorOffset(it)) },
             modifier = Modifier.fillMaxWidth()
         )
 
@@ -548,6 +550,8 @@ private enum class EditedField { TX, PASSBAND, RX }
 private fun DopplerFrequencyCalculator(
     transponder: SatRadio,
     orbitalPos: OrbitalPos?,
+    offsetKHz: String = "",
+    onOffsetChange: (String) -> Unit = {},
     modifier: Modifier = Modifier
 ) {
     if (orbitalPos == null || !DopplerFrequencyCalculator.isLinearTransponder(transponder)) return
@@ -556,17 +560,6 @@ private fun DopplerFrequencyCalculator(
     var txFrequencyHz by rememberSaveable(transponder.uuid) { mutableStateOf(0L) }
     var rxFrequencyHz by rememberSaveable(transponder.uuid) { mutableStateOf(0L) }
     var passbandPosition by rememberSaveable(transponder.uuid) { mutableStateOf(0.5f) }
-    // 每个卫星独立记忆 offset：以 NORAD 编号为 key，存到应用 SharedPreferences
-    val context = LocalContext.current
-    val catnum = transponder.catnum
-    var offsetKHz by remember(catnum) {
-        mutableStateOf(
-            catnum?.let { cn ->
-                context.getSharedPreferences(context.packageName + "_preferences", Context.MODE_PRIVATE)
-                    .getString("offset_khz_$cn", "") ?: ""
-            } ?: ""
-        )
-    }
     var stepSizeKHz by remember { mutableIntStateOf(1) }
 
     val offsetHz = offsetKHz.toDoubleOrNull()?.let { it * 1000 }?.toLong() ?: 0L
@@ -752,15 +745,7 @@ private fun DopplerFrequencyCalculator(
                 ) {
                     BasicTextField(
                         value = offsetKHz,
-                        onValueChange = { newValue ->
-                            offsetKHz = newValue
-                            catnum?.let { cn ->
-                                context.getSharedPreferences(
-                                    context.packageName + "_preferences",
-                                    Context.MODE_PRIVATE
-                                ).edit().putString("offset_khz_$cn", newValue).apply()
-                            }
-                        },
+                        onValueChange = onOffsetChange,
                         singleLine = true,
                         textStyle = TextStyle(
                             fontSize = 16.sp,