feat(map): replace Google Maps + OSMDroid with unified MapLibre Compose Multiplatform

Replace the dual flavor-specific map implementations (Google Maps for google,
OSMDroid for fdroid) with a single MapLibre Compose Multiplatform implementation
in feature:map/commonMain, eliminating ~8,500 lines of duplicated code.

Key changes:
- Add maplibre-compose v0.12.1 dependency (KMP: Android, Desktop, iOS)
- Create unified MapViewModel with camera persistence via MapCameraPrefs
- Create MapScreen, MaplibreMapContent, NodeTrackLayers, TracerouteLayers,
  InlineMap, NodeTrackMap, TracerouteMap, NodeMapScreen in commonMain
- Create MapStyle enum with predefined OpenFreeMap tile styles
- Create GeoJsonConverters for Node/Waypoint/Position to GeoJSON
- Move TracerouteMapScreen from feature:node/androidMain to commonMain
- Wire navigation to use direct imports instead of CompositionLocal providers
- Delete 61 flavor-specific map files (google + fdroid source sets)
- Remove 8 CompositionLocal map providers from core:ui
- Remove SharedMapViewModel (replaced by new MapViewModel)
- Remove dead google-maps and osmdroid entries from version catalog
- Add MapViewModelTest with 10 test cases in commonTest

Baseline verified: spotlessCheck, detekt, assembleGoogleDebug, allTests all pass.

feature/node/src/commonMain/kotlin/org/meshtastic/feature/node/component/PositionSection.kt

@@ -43,7 +43,7 @@ import org.meshtastic.core.resources.open_compass
 import org.meshtastic.core.ui.icon.Compass
 import org.meshtastic.core.ui.icon.Distance
 import org.meshtastic.core.ui.icon.MeshtasticIcons
-import org.meshtastic.core.ui.util.LocalInlineMapProvider
+import org.meshtastic.feature.map.component.InlineMap
 import org.meshtastic.feature.node.model.NodeDetailAction
 import org.meshtastic.proto.Config
 
@@ -85,7 +85,7 @@ internal fun PositionInlineContent(
 private fun PositionMap(node: Node, distance: String?) {
     Box(modifier = Modifier.padding(vertical = 4.dp)) {
         Surface(shape = MaterialTheme.shapes.large, modifier = Modifier.fillMaxWidth().height(MAP_HEIGHT_DP.dp)) {
-            LocalInlineMapProvider.current(node, Modifier.fillMaxSize())
+            InlineMap(node, Modifier.fillMaxSize())
         }
         if (distance != null && distance.isNotEmpty()) {
             Surface(

feature/node/src/commonMain/kotlin/org/meshtastic/feature/node/metrics/PositionLogScreens.kt

@@ -31,8 +31,8 @@ import org.meshtastic.core.resources.position_log
 import org.meshtastic.core.ui.icon.Delete
 import org.meshtastic.core.ui.icon.MeshtasticIcons
 import org.meshtastic.core.ui.icon.Refresh
-import org.meshtastic.core.ui.util.LocalNodeTrackMapProvider
 import org.meshtastic.core.ui.util.rememberSaveFileLauncher
+import org.meshtastic.feature.map.component.NodeTrackMap
 
 @Composable
 fun PositionLogScreen(viewModel: MetricsViewModel, onNavigateUp: () -> Unit) {
@@ -41,9 +41,6 @@ fun PositionLogScreen(viewModel: MetricsViewModel, onNavigateUp: () -> Unit) {
 
     val exportPositionLauncher = rememberSaveFileLauncher { uri -> viewModel.savePositionCSV(uri, positions) }
 
-    val trackMap = LocalNodeTrackMapProvider.current
-    val destNum = state.node?.num ?: 0
-
     BaseMetricScreen(
         onNavigateUp = onNavigateUp,
         telemetryType = null,
@@ -66,7 +63,12 @@ fun PositionLogScreen(viewModel: MetricsViewModel, onNavigateUp: () -> Unit) {
         },
         chartPart = { modifier, selectedX, _, onPointSelected ->
             val selectedTime = selectedX?.toInt()
-            trackMap(destNum, positions, modifier, selectedTime) { time -> onPointSelected(time.toDouble()) }
+            NodeTrackMap(
+                positions = positions,
+                modifier = modifier,
+                selectedPositionTime = selectedTime,
+                onPositionSelected = { time -> onPointSelected(time.toDouble()) },
+            )
         },
         listPart = { modifier, selectedX, lazyListState, onCardClick ->
             LazyColumn(modifier = modifier.fillMaxSize(), state = lazyListState) {

feature/node/src/commonMain/kotlin/org/meshtastic/feature/node/metrics/TracerouteMapScreen.kt

@@ -52,8 +52,7 @@ import org.meshtastic.core.ui.component.MainAppBar
 import org.meshtastic.core.ui.icon.MeshtasticIcons
 import org.meshtastic.core.ui.icon.Route
 import org.meshtastic.core.ui.theme.TracerouteColors
-import org.meshtastic.core.ui.util.LocalTracerouteMapOverlayInsetsProvider
-import org.meshtastic.core.ui.util.LocalTracerouteMapProvider
+import org.meshtastic.feature.map.component.TracerouteMap
 import org.meshtastic.proto.Position
 
 @Composable
@@ -102,7 +101,6 @@ private fun TracerouteMapScaffold(
 ) {
     var tracerouteNodesShown by remember { mutableStateOf(0) }
     var tracerouteNodesTotal by remember { mutableStateOf(0) }
-    val insets = LocalTracerouteMapOverlayInsetsProvider.current
     Scaffold(
         topBar = {
             MainAppBar(
@@ -117,18 +115,18 @@ private fun TracerouteMapScaffold(
         },
     ) { paddingValues ->
         Box(modifier = modifier.fillMaxSize().padding(paddingValues)) {
-            LocalTracerouteMapProvider.current(
-                overlay,
-                snapshotPositions,
-                { shown: Int, total: Int ->
+            TracerouteMap(
+                tracerouteOverlay = overlay,
+                tracerouteNodePositions = snapshotPositions,
+                onMappableCountChanged = { shown: Int, total: Int ->
                     tracerouteNodesShown = shown
                     tracerouteNodesTotal = total
                 },
-                Modifier.fillMaxSize(),
+                modifier = Modifier.fillMaxSize(),
             )
             Column(
-                modifier = Modifier.align(insets.overlayAlignment).padding(insets.overlayPadding),
-                horizontalAlignment = insets.contentHorizontalAlignment,
+                modifier = Modifier.align(Alignment.BottomCenter).padding(bottom = 16.dp),
+                horizontalAlignment = Alignment.CenterHorizontally,
                 verticalArrangement = Arrangement.spacedBy(8.dp),
             ) {
                 TracerouteNodeCount(shown = tracerouteNodesShown, total = tracerouteNodesTotal)

feature/node/src/commonMain/kotlin/org/meshtastic/feature/node/navigation/NodesNavigation.kt

@@ -66,6 +66,7 @@ import org.meshtastic.feature.node.metrics.PositionLogScreen
 import org.meshtastic.feature.node.metrics.PowerMetricsScreen
 import org.meshtastic.feature.node.metrics.SignalMetricsScreen
 import org.meshtastic.feature.node.metrics.TracerouteLogScreen
+import org.meshtastic.feature.node.metrics.TracerouteMapScreen
 import kotlin.reflect.KClass
 
 @OptIn(ExperimentalMaterial3AdaptiveApi::class)
@@ -143,8 +144,14 @@ fun EntryProviderScope<NavKey>.nodeDetailGraph(
     }
 
     entry<NodeDetailRoute.TracerouteMap>(metadata = { ListDetailSceneStrategy.extraPane() }) { args ->
-        val tracerouteMapScreen = org.meshtastic.core.ui.util.LocalTracerouteMapScreenProvider.current
-        tracerouteMapScreen(args.destNum, args.requestId, args.logUuid) { backStack.removeLastOrNull() }
+        val metricsViewModel = koinViewModel<MetricsViewModel> { parametersOf(args.destNum) }
+        metricsViewModel.setNodeId(args.destNum)
+        TracerouteMapScreen(
+            metricsViewModel = metricsViewModel,
+            requestId = args.requestId,
+            logUuid = args.logUuid,
+            onNavigateUp = { backStack.removeLastOrNull() },
+        )
     }
 
     NodeDetailScreen.entries.forEach { routeInfo ->