fix: resolve Kotlin compilation errors from UI refactor

- Make InstrumentHandler.labelTrend and barometerTrendView nullable
- Remove anchorWatchHandler init block referencing non-existent view IDs
- Fix state.radiusM -> state.watchCircleRadiusMeters
- Add bottom_nav_weather_menu.xml with nav_forecast; point WeatherActivity at it

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

4 files changed, 18 insertions, 16 deletions

diff --git a/android-app/app/src/main/kotlin/org/terst/nav/MainActivity.kt b/android-app/app/src/main/kotlin/org/terst/nav/MainActivity.kt
index bbc9853..d0b0e58 100644
--- a/android-app/app/src/main/kotlin/org/terst/nav/MainActivity.kt
+++ b/android-app/app/src/main/kotlin/org/terst/nav/MainActivity.kt
@@ -159,16 +159,7 @@ class MainActivity : AppCompatActivity(), SafetyFragment.SafetyListener {
             polarDiagramView = findViewById(R.id.polar_diagram_view)
         )
         
-        anchorWatchHandler = AnchorWatchHandler(
-            context = this,
-            container = findViewById(R.id.anchor_config_container) ?: FrameLayout(this), // stub for now
-            statusText = findViewById(R.id.anchor_status_text) ?: android.widget.TextView(this),
-            radiusText = findViewById(R.id.anchor_radius_text) ?: android.widget.TextView(this),
-            buttonDecrease = findViewById(R.id.button_decrease_radius) ?: android.widget.Button(this),
-            buttonIncrease = findViewById(R.id.button_increase_radius) ?: android.widget.Button(this),
-            buttonSet = findViewById(R.id.button_set_anchor) ?: android.widget.Button(this),
-            buttonStop = findViewById(R.id.button_stop_anchor) ?: android.widget.Button(this)
-        )
+        // anchorWatchHandler is initialized when the anchor config UI is available
 
         val mockPolarTable = createMockPolarTable()
         findViewById<PolarDiagramView>(R.id.polar_diagram_view).setPolarTable(mockPolarTable)
@@ -242,7 +233,7 @@ class MainActivity : AppCompatActivity(), SafetyFragment.SafetyListener {
         }
         lifecycleScope.launch {
             LocationService.anchorWatchState.collect { state ->
-                safetyFragment.updateAnchorStatus(if (state.isActive) "Active: ${state.radiusM}m" else "Inactive")
+                safetyFragment.updateAnchorStatus(if (state.isActive) "Active: ${state.watchCircleRadiusMeters}m" else "Inactive")
             }
         }
     }
diff --git a/android-app/app/src/main/kotlin/org/terst/nav/ui/InstrumentHandler.kt b/android-app/app/src/main/kotlin/org/terst/nav/ui/InstrumentHandler.kt
index 63c6165..2f72153 100644
--- a/android-app/app/src/main/kotlin/org/terst/nav/ui/InstrumentHandler.kt
+++ b/android-app/app/src/main/kotlin/org/terst/nav/ui/InstrumentHandler.kt
@@ -21,8 +21,8 @@ class InstrumentHandler(
     private val valueDepth: TextView,
     private val valuePolarPct: TextView,
     private val valueBaro: TextView,
-    private val labelTrend: TextView,
-    private val barometerTrendView: BarometerTrendView,
+    private val labelTrend: TextView?,
+    private val barometerTrendView: BarometerTrendView?,
     private val polarDiagramView: PolarDiagramView
 ) {
     /**
@@ -51,7 +51,7 @@ class InstrumentHandler(
         depth?.let { valueDepth.text = it }
         polarPct?.let { valuePolarPct.text = it }
         baro?.let { valueBaro.text = it }
-        trend?.let { labelTrend.text = it }
+        trend?.let { labelTrend?.text = it }
     }
 
     /**
@@ -65,6 +65,6 @@ class InstrumentHandler(
      * Updates the barometer trend chart.
      */
     fun updateBarometerTrend(history: List<BarometerReading>) {
-        barometerTrendView.setHistory(history)
+        barometerTrendView?.setHistory(history)
     }
 }
diff --git a/android-app/app/src/main/res/layout/activity_weather.xml b/android-app/app/src/main/res/layout/activity_weather.xml
index 36ea871..68374ca 100644
--- a/android-app/app/src/main/res/layout/activity_weather.xml
+++ b/android-app/app/src/main/res/layout/activity_weather.xml
@@ -14,7 +14,7 @@
         android:id="@+id/bottom_nav"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        app:menu="@menu/bottom_nav_menu"
+        app:menu="@menu/bottom_nav_weather_menu"
         xmlns:app="http://schemas.android.com/apk/res-auto" />
 
 </LinearLayout>
diff --git a/android-app/app/src/main/res/menu/bottom_nav_weather_menu.xml b/android-app/app/src/main/res/menu/bottom_nav_weather_menu.xml
new file mode 100644
index 0000000..d3c1427
--- /dev/null
+++ b/android-app/app/src/main/res/menu/bottom_nav_weather_menu.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+    <item
+        android:id="@+id/nav_map"
+        android:icon="@drawable/ic_map"
+        android:title="Map" />
+    <item
+        android:id="@+id/nav_forecast"
+        android:icon="@drawable/ic_instruments"
+        android:title="Forecast" />
+</menu>