feat(status): add AMSAT satellite status tracking

New feature: displays recent AMSAT satellite activity from amsat.org API.
Shows 6-day status grid (Heard/Telemetry/Not Heard) + detailed reports.

Addresses PR #233 feedback:
- Uses Material3 colorScheme (tertiary/tertiaryContainer) for theme support
- HTTP in data layer via RemoteSource (Clean Architecture)
- SimpleDateFormat instead of manual date math
- Edge-to-edge support

Implementation:
- feature:status module (AMSAT status screen + legend)
- core:data AmSatRepository (API client using RemoteSource)
- core:domain models (SatStatus/SatReport/SatSlot/SatDay)
- MainTheme.kt: AMSAT colors mapped to colorScheme slots

Navigation intentionally not included - you mentioned potential UI
restructuring (Navigation Drawer). The screen is ready to integrate
wherever it fits your roadmap.

Ref: https://github.com/rt-bishop/Look4Sat/pull/233

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

@@ -79,6 +79,10 @@ private val lightScheme = lightColorScheme(
     onSecondary = Color(0xFFFFFFFF),
     secondaryContainer = Color(0xFFF1E1BB),
     onSecondaryContainer = Color(0xFF221B04),
+    tertiary = Color(0xFF3C6FE0), // AMSAT Active (darker for light theme)
+    onTertiary = Color(0xFFFFFFFF),
+    tertiaryContainer = Color(0xFFE09800), // AMSAT Telemetry (darker)
+    onTertiaryContainer = Color(0xFF000000),
     background = Color(0xFFFFF8F0),
     onBackground = Color(0xFF1E1B13),
     surface = Color(0xFFFFF8F0),
@@ -101,10 +105,10 @@ private val darkScheme = darkColorScheme(
     onSecondary = Color(0xFF000000),
     secondaryContainer = Color(0xFF404040), // navBar indicator,
     onSecondaryContainer = Color(0xFFE0E0E0), // navBar active icon
-//    tertiary = Color(0xFF121212),
-//    onTertiary = Color(0xFF121212),
-//    tertiaryContainer = Color(0xFF121212),
-//    onTertiaryContainer = Color(0xFF121212),
+    tertiary = Color(0xFF648FFF), // AMSAT Active (from amsat.org/status)
+    onTertiary = Color(0xFF000000),
+    tertiaryContainer = Color(0xFFFFB000), // AMSAT Telemetry
+    onTertiaryContainer = Color(0xFF000000),
     background = Color(0xFF121212),
     onBackground = Color(0xFFE0E0E0),
     surface = Color(0xFF202020), // card background

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

@@ -67,6 +67,21 @@
         \n* Replaced the types selection dialog with modes selection to avoid confusion
     </string>
 
+    <!-- AMSAT Status screen -->
+    <string name="nav_amsat">AMSAT</string>
+    <string name="amsat_title">AMSAT Satellite Status</string>
+    <string name="amsat_refresh">Refresh</string>
+    <string name="amsat_retry">Retry</string>
+    <string name="amsat_updated">Updated:</string>
+    <string name="amsat_active">Active</string>
+    <string name="amsat_tlm">TLM/Beacon</string>
+    <string name="amsat_not_heard">Not Heard</string>
+    <string name="amsat_conflict">Conflicting</string>
+    <string name="amsat_name">Name</string>
+    <string name="amsat_load_failed">Load failed - check network and retry</string>
+    <string name="amsat_no_reports">No reports for this period</string>
+    <string name="amsat_close">Close</string>
+
     <!-- Radar screen -->
     <string name="radar_back">Back</string>
     <string name="radar_notify">Notify</string>