chore: bump version to 4.4.7-ba7opf.3 (versionCode 473)

fix(awards): close antimeridian-straddling rings so shared zone/country boundaries render
WAZ/DXCC award rings are stored with the closing edge implicit (the renderer close()s single-segment rings). Rings that straddle ±180° are split into multiple segments, and multi-segment rings must not be close()d (each close() would draw a spurious chord across the map), so the implicit closing edge was never drawn -> the shared boundary between WAZ zones 31/32 (165E,-8 -> 180,-12), and the closing edges of Russia's main ring / Fiji / Russia's Chukotka tip in DXCC, stayed open. Fix: store every ring explicitly closed (append first point). splitRingAt Antimeridian then cuts the closing edge at ±180 exactly like any other edge, so each segment ends on the correct side and the boundary lines render.
2026-10-02 03:15:37 +00:00 · 2026-09-15 11:16:33 +08:00 · 2026-09-15 11:16:32 +08:00 · 2026-09-15 10:04:18 +08:00 · 2026-09-15 10:03:30 +08:00 · 2026-09-15 01:49:33 +08:00
8 changed files with 62 additions and 28 deletions
@@ -6,13 +6,12 @@

 ## 本仓库特色功能

- **网格地图模式（Grid Mode）** — 地图页内置 VUCC 网格覆盖图：已通联网格绿色填充、漫游网格蓝色 45° 斜纹（疏朗半透明样式）、当前所在方格淡黄加粗框（field 与 sub-square 缩放均显示）；极区（南北纬 80°–90°）网格线与二位标签完整可见；点击已通联网格弹出该网格内通联明细弹窗；进入网格模式默认 VUCC 视图
- **奖状边界模式（Award Boundaries）** — 在网格地图上叠加 DXCC / WAPC / WAJA / WAZ / WAS 国界·省界·分区边界，已确认区域绿色填充；香港/澳门作为独立实体显示（DXCC 321/152），港澳标签强制显示
+- **网格地图模式（Grid Mode）** — 地图页内置 VUCC 网格覆盖图：已通联网格绿色填充、漫游网格蓝色 45° 斜纹（疏朗半透明样式）、当前所在方格淡黄加粗框；点击已通联网格弹出该网格内通联明细弹窗；进入网格模式默认 VUCC 视图
+- **奖状边界模式（Award Boundaries）** — 在网格地图上叠加 DXCC / WAPC / WAJA / WAZ / WAS 国界·省界·分区边界，已确认区域绿色填充
 - **LoTW 网格同步** — 直连 ARRL Logbook（账号密码验证）下载确认报告，worked / roamed 网格自动更新（兼容任意字段顺序的 ADIF 解析）；同步失败按凭据错误/限流/超时分类提示
 - **双站过境匹配（Mutual Pass）** — 输入友台经纬度/网格，筛选双方同时可见的卫星过境，在地图上同时显示双方仰角曲线和地面轨迹，支持一键跳转雷达页查看详情
 - **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（arm64 + armeabi-v7a 双架构）
- **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
 - **AMSAT 状态页** — 实时查看卫星的业余无线电转发器状态（开启/关闭/待机），支持 72 小时历史记录回放，启动时预取缓存
 - **应用内更新检查** — 设置页一键检查 GitHub 最新 Release，展示版本说明并直接下载安装
 - **自定义 TLE 数据源** — 可添加自定义 TLE/Celestrak CSV 数据源，长按拖拽排序，数据源启停开关与 HTTP 状态码显示
@@ -122,10 +122,8 @@
    <string name="map_visibility">能见度：%s</string>
    <!-- Worked-grid QSO dialog -->
    <string name="grid_qso_calls_count">%d 个呼号 · %d 次通联</string>
-    <plurals name="grid_qso_count">
-        <item quantity="one">%d QSO</item>
-        <item quantity="other">%d QSOs</item>
-    </plurals>
+    <string name="grid_qso_count_one">%d QSO</string>
+    <string name="grid_qso_count_many">%d QSOs</string>
    <string name="grid_qso_first">首通</string>
    <string name="grid_qso_no_sat">卫星未知</string>
    <string name="map_visible">日照中</string>
@@ -147,10 +147,8 @@
    <string name="map_visibility">Visibility: %s</string>
    <!-- Worked-grid QSO dialog -->
    <string name="grid_qso_calls_count">%d callsigns · %d QSOs</string>
-    <plurals name="grid_qso_count">
-        <item quantity="one">%d QSO</item>
-        <item quantity="other">%d QSOs</item>
-    </plurals>
+    <string name="grid_qso_count_one">%d QSO</string>
+    <string name="grid_qso_count_many">%d QSOs</string>
    <string name="grid_qso_first">First</string>
    <string name="grid_qso_no_sat">satellite unknown</string>
    <string name="map_visible">Visible</string>
@@ -1 +1 @@
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+{"type":"dxcc","regions":[{"id":0,"code":176,"name":"Fiji","label_lon":177.9759,"label_lat":-17.9376,"rings":[[[180.0,-16.0671],[180.0,-16.5552],[179.3641,-16.8014],[178.7251,-17.012],[178.5968,-16.6392],[179.0966,-16.434],[179.4135,-16.3791],[180.0,-16.0671]],[[178.1256,-17.5048],[178.3736,-17.3399],[178.7181,-17.6285],[178.5527,-18.1506],[177.9327,-18.288],[177.3815,-18.1643],[177.285,-17.7247],[177.6709,-17.3811]],[[-179.7933,-16.0209],[-179.9174,-16.5018],[-180.0,-16.5552],[-180.0,-16.0671]]]},{"id":1,"code":470,"name":"Tanzania","label_lon":34.1421,"label_lat":-6.2078,"rings":[[[33.9037,-0.95],[34.0726,-1.0598],[37.6987,-3.097],[37.7669,-3.6771],[39.2022,-4.6768],[38.7405,-5.9089],[38.7998,-6.4757],[39.44,-6.84],[39.47,-7.1],[39.1947,-7.7039],[39.252,-8.0078],[39.1865,-8.4855],[39.5357,-9.1124],[39.9496,-10.0984],[40.3166,-10.3171],[40.3166,-10.3171],[39.521,-10.8969],[38.4276,-11.2852],[37.8276,-11.2688],[37.4713,-11.5688],[36.7752,-11.5945],[36.5141,-11.7209],[35.3124,-11.4391],[34.56,-11.52],[34.28,-10.16],[33.9408,-9.6937],[33.7397,-9.4171],[32.7594,-9.2306],[32.1919,-8.9304],[31.5563,-8.762],[31.1578,-8.5946],[30.74,-8.34],[30.74,-8.34],[30.2,-7.08],[29.62,-6.52],[29.42,-5.94],[29.52,-5.42],[29.34,-4.5],[29.7535,-4.4524],[30.1163,-4.0901],[30.5055,-3.5686],[30.7522,-3.3593],[30.743,-3.0343],[30.5277,-2.8076],[30.4697,-2.4139],[30.4697,-2.4138],[30.7583,-2.2872],[30.8161,-1.6989],[30.4191,-1.1347],[30.7699,-1.0146],[31.8662,-1.0274]]]},{"id":2,"code":302,"name":"W. 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@@ -1 +1 @@
-{"type":"waz","regions":[{"id":1,"code":"1","name":"1","label_lon":-140,"label_lat":75,"rings":[[[-109.0,85.0],[-109.0,77.5],[-103.2588,75.2824],[-103.4495,72.3827],[-99.2896,70.6113],[-102.0,68.0],[-102.0,60.0],[-139.0569,60.0001],[-138.7074,59.9061],[-138.6686,59.8091],[-138.626,59.7686],[-137.6062,59.2436],[-137.5007,58.9835],[-137.5266,58.9059],[-137.4512,58.9081],[-137.281,59.001],[-136.8272,59.1604],[-136.5843,59.166],[-136.4897,59.2595],[-136.4956,59.2754],[-136.4695,59.284],[-136.4771,59.4656],[-136.3681,59.449],[-136.3055,59.4644],[-136.2387,59.5242],[-136.2393,59.5592],[-136.3538,59.5998],[-136.1933,59.6401],[-135.9529,59.6622],[-135.4793,59.798],[-135.3601,59.7376],[-135.2336,59.6962],[-135.2198,59.6627],[-135.1575,59.6257],[-135.1179,59.6231],[-135.0289,59.5637],[-135.0275,59.4748],[-135.101,59.4276],[-134.9897,59.3871],[-135.0305,59.3466],[-134.9596,59.2808],[-134.7007,59.2489],[-134.6793,59.1925],[-134.5659,59.1312],[-134.4831,59.1316],[-134.3821,59.0386],[-134.4072,58.9796],[-134.3138,58.962],[-134.3365,58.9235],[-134.2579,58.8612],[-133.8404,58.7293],[-133.7068,58.6117],[-133.3772,58.4303],[-133.462,58.3879],[-133.346,58.2769],[-133.1722,58.1536],[-133.0701,58.0002],[-132.8689,57.8393],[-132.7512,57.6962],[-132.5542,57.4971],[-132.37,57.35],[-132.2487,57.2116],[-132.3688,57.0917],[-132.0449,57.045],[-132.1237,56.8739],[-131.8735,56.806],[-131.9009,56.7537],[-131.8604,56.703],[-131.8353,56.5994],[-131.5815,56.6123],[-131.4716,56.5523],[-131.1726,56.4494],[-131.0884,56.4062],[-130.7825,56.3671],[-130.6242,56.2672],[-130.4683,56.2431],[-130.4264,56.1415],[-130.2468,56.0966],[-130.104,56.1229],[-130.0037,56.0081],[-130.0178,55.9119],[-130.0041,55.9074],[-130.1524,55.7664],[-130.1481,55.7152],[-130.1118,55.6829],[-130.1281,55.5809],[-130.09,55.498],[-130.0413,55.4517],[-130.0211,55.3379],[-129.9742,55.282],[-130.1029,55.1926],[-130.1876,55.0629],[-130.346,54.9177],[-130.5682,54.7922],[-130.6591,54.7631],[-130.6257,54.7381],[-130.6156,54.7074],[-134.5376,54.2944],[-140.0,50.0],[-140.0,40.0],[-190.0,40.0],[-190.0,53.0],[-167.6871,66.6671],[-180.0,75.0],[-180.0,85.0]]]},{"id":2,"code":"2","name":"2","label_lon":-82.5,"label_lat":70,"rings":[[[-109.0,85.0],[-109.0,77.5],[-103.2588,75.2824],[-103.4495,72.3827],[-99.2896,70.6113],[-102.0,68.0],[-102.0,60.0],[-85.0,60.0],[-80.8725,54.5159],[-79.7772,51.8514],[-79.6522,51.6179],[-79.5157,51.4606],[-79.5176,50.0],[-60.0,50.0],[-55.9546,51.7455],[-55.4041,51.765],[-49.0,53.0],[-52.2437,59.5838],[-57.8076,67.1394],[-67.854,74.2269],[-74.0332,75.4972],[-74.8618,77.4191],[-73.5809,78.5637],[-69.8831,79.5013],[-68.2947,80.439],[-60.0073,82.2668],[-60.0,85.0]]]},{"id":3,"code":"3","name":"3","label_lon":-125,"label_lat":45,"rings":[[[-120.0,60.0],[-139.0569,60.0001],[-138.7074,59.9061],[-138.6686,59.8091],[-138.626,59.7686],[-137.6062,59.2436],[-137.5007,58.9835],[-137.5266,58.9059],[-137.4512,58.9081],[-137.281,59.001],[-136.8272,59.1604],[-136.5843,59.166],[-136.4897,59.2595],[-136.4956,59.2754],[-136.4695,59.284],[-136.4771,59.4656],[-136.3681,59.449],[-136.3055,59.4644],[-136.2387,59.5242],[-136.2393,59.5592],[-136.3538,59.5998],[-136.1933,59.6401],[-135.9529,59.6622],[-135.4793,59.798],[-135.3601,59.7376],[-135.2336,59.6962],[-135.2198,59.6627],[-135.1575,59.6257],[-135.1179,59.6231],[-135.0289,59.5637],[-135.0275,59.4748],[-135.101,59.4276],[-134.9897,59.3871],[-135.0305,59.3466],[-134.9596,59.2808],[-134.7007,59.2489],[-134.6793,59.1925],[-134.5659,59.1312],[-134.4831,59.1316],[-134.3821,59.0386],[-134.4072,58.9796],[-134.3138,58.962],[-134.3365,58.9235],[-134.2579,58.8612],[-133.8404,58.7293],[-133.7068,58.6117],[-133.3772,58.4303],[-133.462,58.3879],[-133.346,58.2769],[-133.1722,58.1536],[-133.0701,58.0002],[-132.8689,57.8393],[-132.7512,57.6962],[-132.5542,57.4971],[-132.37,57.35],[-132.2487,57.2116],[-132.3688,57.0917],[-132.0449,57.045],[-132.1237,56.8739],[-131.8735,56.806],[-131.9009,56.7537],[-131.8604,56.703],[-131.8353,56.5994],[-131.5815,56.6123],[-131.4716,56.5523],[-131.1726,56.4494],[-131.0884,56.4062],[-130.7825,56.3671],[-130.6242,56.2672],[-130.4683,56.2431],[-130.4264,56.1415],[-130.2468,56.0966],[-130.104,56.1229],[-130.0037,56.0081],[-130.0178,55.9119],[-130.0041,55.9074],[-130.1524,55.7664],[-130.1481,55.7152],[-130.1118,55.6829],[-130.1281,55.5809],[-130.09,55.498],[-130.0413,55.4517],[-130.0211,55.3379],[-129.9742,55.282],[-130.1029,55.1926],[-130.1876,55.0629],[-130.346,54.9177],[-130.5682,54.7922],[-130.6591,54.7631],[-130.6257,54.7381],[-130.6156,54.7074],[-134.5376,54.2944],[-140.0,50.0],[-140.0,40.0],[-130.0,40.0],[-130.0,32.5],[-120.0,32.5],[-117.1249,32.534],[-114.7197,32.7187],[-114.7643,32.6427],[-114.8087,32.6191],[-114.7997,32.5924],[-114.8137,32.5613],[-114.7932,32.5696],[-114.7916,32.5558],[-114.8057,32.5467],[-114.8135,32.4943],[-111.0748,31.3322],[-109.05,31.3325],[-109.0501,41.0007],[-111.0467,40.9979],[-111.049,44.474],[-111.1227,44.4937],[-111.1394,44.5171],[-111.1317,44.5326],[-111.177,44.5509],[-111.1808,44.569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truncated
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Line truncated
@@ -428,7 +428,15 @@ class MaidenheadGridOverlay : Overlay() {

    /** Y pixel for a latitude, or null when outside the viewport. */
    private fun projectionToY(projection: Projection, lat: Double): Float? {
-        val geo = org.osmdroid.util.GeoPoint(lat, 0.0)
+        // Web Mercator is undefined beyond ±85.0511° (osmdroid clamps the world
+        // to TileSystemWebMercator limits). Projecting the polar field rows
+        // (lat=±90: Maidenhead row R = 80..90°N, row A = -90..-80°S) yields
+        // ±9.2e18 pixel coordinates that the canvas cannot rasterize, so the
+        // polar grid lines silently vanish. Clamp to the Mercator limit: the
+        // polar rows then project onto the screen edge and their lines are
+        // drawn (the off-limit sliver beyond 85.05° is invisible anyway).
+        val clamped = lat.coerceIn(-MAX_MERCATOR_LAT, MAX_MERCATOR_LAT)
+        val geo = org.osmdroid.util.GeoPoint(clamped, 0.0)
        val p = projection.toPixels(geo, null)
        return p.y.toFloat()
    }
@@ -484,6 +492,9 @@ class MaidenheadGridOverlay : Overlay() {
        const val FIELD_LON = 20.0
        const val SUB_SQUARE_LAT = 1.0
        const val SUB_SQUARE_LON = 2.0
+        // Web Mercator latitude limit (osmdroid TileSystemWebMercator): projecting
+        // beyond it produces ±9.2e18 pixel coordinates the canvas cannot draw.
+        const val MAX_MERCATOR_LAT = 85.05112877980658
        // Zoom at which the 2°x1° sub-square grid lines/fills appear.
        // 5.0 → 6.0: at zoom 5 a full field spans too little screen width and
        // the sub-square grid is too dense to read; 6 roughly doubles the
@@ -62,7 +62,6 @@ import androidx.compose.ui.draw.rotate
 import androidx.compose.ui.draw.scale
 import androidx.compose.ui.graphics.Color as ComposeColor
 import androidx.compose.ui.platform.LocalContext
-import androidx.compose.ui.res.pluralStringResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
@@ -207,8 +206,13 @@ private fun MapScreen(uiState: MapState, onAction: (MapAction) -> Unit, mapView:
            if (p.type == AwardType.VUCC) p.copy(workedKeys = vuccGrids, count = vuccGrids.size) else p
        }
    }
-    // Attach the tap listener whenever grid mode / worked grids change.
-    val workedGrids = uiState.workedGrids
+    // Worked grids drawn on the map: filtered by the selected operated grid
+    // (null = all operated grids). Drives both the green fills and the tap
+    // listener below, so switching the selector changes which cells are green.
+    val workedGrids = remember(uiState.workedGrids, vuccByMyGrid, selectedMyGrid) {
+        if (selectedMyGrid == null) uiState.workedGrids
+        else vuccByMyGrid[selectedMyGrid] ?: emptySet()
+    }
    val isGridMode = uiState.isGridMode
    DisposableEffect(isGridMode, workedGrids) {
        val receiver = object : org.osmdroid.events.MapEventsReceiver {
@@ -297,7 +301,7 @@ private fun MapScreen(uiState: MapState, onAction: (MapAction) -> Unit, mapView:
                        // stationPosition would swallow the centering forever.
                        val shouldCenter = uiState.isGridMode && !prevGridMode
                        setGridMode(
-                            uiState.isGridMode, uiState.workedGrids, uiState.roamedGrids, view,
+                            uiState.isGridMode, workedGrids, uiState.roamedGrids, view,
                            uiState.stationPosition,
                            centerOnStation = shouldCenter
                        )
@@ -322,11 +326,12 @@ private fun MapScreen(uiState: MapState, onAction: (MapAction) -> Unit, mapView:
                    }
                }
                // Top-left: operated-grid selector for VUCC counting (grid mode only).
-                val myGrid = selectedMyGrid
-                if (uiState.isGridMode && selectedAward == AwardType.VUCC && myGrid != null) {
+                // Shown whenever per-grid QSO data exists; "All" (null) is available.
+                if (uiState.isGridMode && selectedAward == AwardType.VUCC && vuccByMyGrid.isNotEmpty()) {
                    VuccGridSelector(
                        options = vuccByMyGrid,
-                        selected = myGrid,
+                        allCount = uiState.workedGrids.size,
+                        selected = selectedMyGrid,
                        onSelect = { selectedMyGrid = it },
                        modifier = Modifier
                            .align(Alignment.TopStart)
@@ -440,7 +445,10 @@ private fun WorkedGridCallRow(
                modifier = Modifier.weight(1f)
            )
            Text(
-                text = pluralStringResource(R.plurals.grid_qso_count, callQsos.size, callQsos.size),
+                // Plurals resources don't work for zh (only 'other' matches), so
+                // pick the singular/plural string explicitly.
+                text = if (callQsos.size == 1) stringResource(R.string.grid_qso_count_one, 1)
+                else stringResource(R.string.grid_qso_count_many, callQsos.size),
                style = MaterialTheme.typography.bodySmall,
                color = MaterialTheme.colorScheme.onSurfaceVariant,
                textAlign = androidx.compose.ui.text.style.TextAlign.Center,
@@ -638,12 +646,13 @@ private fun AwardChipsRow(
@Composable
 private fun VuccGridSelector(
    options: Map<String, Set<String>>,
-    selected: String,
-    onSelect: (String) -> Unit,
+    allCount: Int,
+    selected: String?,
+    onSelect: (String?) -> Unit,
    modifier: Modifier = Modifier
 ) {
    var expanded by remember { mutableStateOf(false) }
-    // Most-worked grid first; selection is made on tap.
+    // Most-worked grid first; selection is made on tap. "All" sits last.
    val sorted = remember(options) { options.entries.sortedByDescending { it.value.size } }
    Surface(
        color = ComposeColor.Black.copy(alpha = 0.45f),
@@ -658,7 +667,8 @@ private fun VuccGridSelector(
                    .padding(start = 10.dp, end = 6.dp, top = 4.dp, bottom = 4.dp)
            ) {
                Text(
-                    text = "$selected (${options[selected]?.size ?: 0})",
+                    text = if (selected == null) "All ($allCount)"
+                    else "$selected (${options[selected]?.size ?: 0})",
                    color = ComposeColor.White,
                    fontSize = 12.sp,
                    fontFamily = androidx.compose.ui.text.font.FontFamily.Monospace
@@ -691,6 +701,24 @@ private fun VuccGridSelector(
                        )
                    }
                }
+                // "All" always listed last: shows every worked grid combined.
+                Row(
+                    verticalAlignment = Alignment.CenterVertically,
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .clickable {
+                            onSelect(null)
+                            expanded = false
+                        }
+                        .padding(horizontal = 10.dp, vertical = 3.dp)
+                ) {
+                    Text(
+                        text = "All ($allCount)",
+                        color = if (selected == null) MaterialTheme.colorScheme.primary else ComposeColor.White,
+                        fontSize = 12.sp,
+                        fontFamily = androidx.compose.ui.text.font.FontFamily.Monospace
+                    )
+                }
            }
        }
    }
@@ -1,8 +1,8 @@
 [versions]
 #noinspection UnusedVersionCatalogEntry
-appVersionCode = "471"
+appVersionCode = "473"
 #noinspection UnusedVersionCatalogEntry
-appVersionName = "4.4.7-ba7opf.1"
+appVersionName = "4.4.7-ba7opf.3"
 #noinspection UnusedVersionCatalogEntry
 compileSdk = "37"
 #noinspection UnusedVersionCatalogEntry
Author	SHA1	Message	Date
atsunatsu	4020381b03	chore: bump version to 4.4.7-ba7opf.3 (versionCode 473)	2026-09-15 11:16:33 +08:00
atsunatsu	b8389f63fe	fix(awards): close antimeridian-straddling rings so shared zone/country boundaries render WAZ/DXCC award rings are stored with the closing edge implicit (the renderer close()s single-segment rings). Rings that straddle ±180° are split into multiple segments, and multi-segment rings must not be close()d (each close() would draw a spurious chord across the map), so the implicit closing edge was never drawn -> the shared boundary between WAZ zones 31/32 (165E,-8 -> 180,-12), and the closing edges of Russia's main ring / Fiji / Russia's Chukotka tip in DXCC, stayed open. Fix: store every ring explicitly closed (append first point). splitRingAt Antimeridian then cuts the closing edge at ±180 exactly like any other edge, so each segment ends on the correct side and the boundary lines render.	2026-09-15 11:16:32 +08:00
atsunatsu	e64beee44f	更新 README.md	2026-09-15 10:04:18 +08:00
atsunatsu	d2dffc039c	更新 README.md	2026-09-15 10:03:30 +08:00
atsunatsu	d7d4a752ed	chore: bump version to 4.4.7-ba7opf.2 (versionCode 472)	2026-09-15 01:49:33 +08:00
atsunatsu	6a3ab54226	fix(map): '1 QSO' singular never matched on zh systems Android plurals have no 'one' category in Chinese (zh plural rules only contain 'other'), so a single QSO rendered as '1 QSOs' on Chinese-locale devices. Replace the plurals resource with explicit singular/plural strings selected in code.	2026-09-15 01:34:04 +08:00
atsunatsu	3b3579696b	fix(map): worked grids follow the selected operated grid; add All option Switching the operated-grid selector now re-filters the green worked cells on the map (the overlay receives the per-grid worked set instead of the global one, on every recomposition via setGridMode). Previously only the VUCC progress count changed while the map stayed green for all operated grids. The selector gains an 'All (n)' entry at the bottom of the list: it selects no operated grid (null), showing every worked grid combined and restoring the global VUCC count.	2026-09-15 00:25:12 +08:00
atsunatsu	826f44829b	fix(map): polar field-row grid lines vanish at field zoom Maidenhead row R (80-90N) and row A (-90..-80S) vertical lines were drawn with projectionToY(±90). Web Mercator diverges there: osmdroid's TileSystemWebMercator yields y01=±Infinity -> Long.MIN/MAX_VALUE pixel coordinates (verified via JVM test: lat=90 -> -9.2e18, lat=-90 -> +9.2e18). The canvas cannot rasterize such coordinates, so the polar rows' grid lines silently disappeared at field zoom (2-char labels). Fix: clamp the projected latitude to the Mercator limit ±85.0511 in projectionToY(). The polar rows then project onto the screen edge and their lines render (the sliver beyond 85.05 is off-screen anyway). Row A kept its symmetric handling; row R now uses the same path.	2026-09-14 21:24:35 +08:00