v1.3.0+4: FOSS Compliance + Dark Mode + Enhanced Settings

✨ Major Features:
- Dark mode toggle with app-wide theme switching
- Sort inventory by Expiration Date, Name, or Location
- Toggle between Grid and List view for inventory
- Export inventory data to CSV with share functionality
- Custom sage leaf app icon with adaptive icon support

🔄 FOSS Compliance (F-Droid Ready):
- Replaced Firebase with Supabase (open-source backend)
- Anonymous authentication (no user accounts required)
- Cloud-first with hosted Supabase as default
- Optional self-hosting support
- 100% FOSS-compliant dependencies

🎨 UI/UX Improvements:
- Dynamic version display from package.json (was hardcoded)
- Added edit buttons for household and user names
- Removed non-functional search button
- Replaced Recipes placeholder with Settings button
- Improved settings organization with clear sections

📦 Dependencies:
Added:
- supabase_flutter: ^2.8.4 (FOSS backend sync)
- package_info_plus: ^8.1.0 (dynamic version)
- csv: ^6.0.0 (data export)
- share_plus: ^10.1.2 (file sharing)
- image: ^4.5.4 (dev, icon generation)

Removed:
- firebase_core (replaced with Supabase)
- cloud_firestore (replaced with Supabase)

🗑️ Cleanup:
- Removed Firebase setup files and google-services.json
- Removed unimplemented features (Recipes, Search)
- Removed firebase_household_service.dart
- Removed inventory_sync_service.dart (replaced with Supabase)

📄 New Files:
- lib/features/household/services/supabase_household_service.dart
- web/privacy-policy.html (Play Store requirement)
- web/terms-of-service.html (Play Store requirement)
- PLAY_STORE_LISTING.md (marketing copy)
- tool/generate_icons.dart (icon generation script)
- assets/icon/sage_leaf.png (1024x1024)
- assets/icon/sage_leaf_foreground.png (adaptive icon)

🐛 Bug Fixes:
- Fixed version display showing hardcoded "1.0.0"
- Fixed Sort By and Default View showing static text
- Fixed ConsumerWidget build signatures
- Fixed Location.displayName import issues
- Added clearAllData method to Hive database

📊 Stats: +1,728 additions, -756 deletions across 42 files

🤖 Generated with Claude Code (https://claude.com/claude-code)

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

lib/main.dart

@@ -1,26 +1,49 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
-import 'package:firebase_core/firebase_core.dart';
+import 'package:supabase_flutter/supabase_flutter.dart';
 import 'core/constants/app_theme.dart';
 import 'data/local/hive_database.dart';
 import 'features/home/screens/home_screen.dart';
+import 'features/settings/models/app_settings.dart';
+
+// Provider to watch settings for dark mode
+final settingsProvider = StreamProvider<AppSettings>((ref) async* {
+  final settings = await HiveDatabase.getSettings();
+  yield settings;
+  // Listen for changes (this will update when settings change)
+  while (true) {
+    await Future.delayed(const Duration(milliseconds: 500));
+    final updatedSettings = await HiveDatabase.getSettings();
+    yield updatedSettings;
+  }
+});
 
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
 
-  // Initialize Firebase (gracefully handle if not configured)
-  try {
-    await Firebase.initializeApp();
-    print('✅ Firebase initialized successfully');
-  } catch (e) {
-    print('⚠️ Firebase initialization failed: $e');
-    print('Household sharing will not work without Firebase configuration.');
-    print('See FIREBASE_SETUP.md for setup instructions.');
-  }
-
   // Initialize Hive database
   await HiveDatabase.init();
 
+  // Initialize Supabase (FOSS Firebase alternative!)
+  // Cloud-first with optional self-hosting!
+  final settings = await HiveDatabase.getSettings();
+
+  // Default to hosted Supabase, or use custom server if configured
+  final supabaseUrl = settings.supabaseUrl ?? 'https://pxjvvduzlqediugxyasu.supabase.co';
+  final supabaseKey = settings.supabaseAnonKey ??
+      'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJzdXBhYmFzZSIsInJlZiI6InB4anZ2ZHV6bHFlZGl1Z3h5YXN1Iiwicm9sZSI6ImFub24iLCJpYXQiOjE3NTk2MTUwNjQsImV4cCI6MjA3NTE5MTA2NH0.gPScm4q4PUDDqnFezYRQnVntiqq-glSIwzSWBhQyzwU';
+
+  await Supabase.initialize(
+    url: supabaseUrl,
+    anonKey: supabaseKey,
+  );
+
+  if (settings.supabaseUrl != null) {
+    print('✅ Using custom Supabase server: ${settings.supabaseUrl}');
+  } else {
+    print('✅ Using hosted Sage sync server (Supabase FOSS backend)');
+  }
+
   runApp(
     const ProviderScope(
       child: SageApp(),
@@ -28,18 +51,34 @@ void main() async {
   );
 }
 
-class SageApp extends StatelessWidget {
+class SageApp extends ConsumerWidget {
   const SageApp({super.key});
 
   @override
-  Widget build(BuildContext context) {
-    return MaterialApp(
-      title: 'Sage 🌿',
-      debugShowCheckedModeBanner: false,
-      theme: AppTheme.lightTheme,
-      darkTheme: AppTheme.darkTheme,
-      themeMode: ThemeMode.light, // We'll make this dynamic later
-      home: const HomeScreen(),
+  Widget build(BuildContext context, WidgetRef ref) {
+    final settingsAsync = ref.watch(settingsProvider);
+
+    return settingsAsync.when(
+      data: (settings) => MaterialApp(
+        title: 'Sage 🌿',
+        debugShowCheckedModeBanner: false,
+        theme: AppTheme.lightTheme,
+        darkTheme: AppTheme.darkTheme,
+        themeMode: settings.darkModeEnabled ? ThemeMode.dark : ThemeMode.light,
+        home: const HomeScreen(),
+      ),
+      loading: () => const MaterialApp(
+        debugShowCheckedModeBanner: false,
+        home: Scaffold(
+          body: Center(child: CircularProgressIndicator()),
+        ),
+      ),
+      error: (_, __) => const MaterialApp(
+        debugShowCheckedModeBanner: false,
+        home: Scaffold(
+          body: Center(child: Text('Error loading settings')),
+        ),
+      ),
     );
   }
 }