fix: Use proper app support directory for config storage (#74)

Move config.json from Documents folder to the proper application
support directory (AppData\Roaming on Windows, ~/.local/share on Linux,
~/Library/Application Support on macOS).

This fixes the app hanging on startup on Windows 11 25H2 when the
Documents folder is inaccessible (OneDrive sync issues, permissions,
network redirects, etc.).

Changes:
- Use getApplicationSupportDirectory() instead of getApplicationDocumentsDirectory()
- Add 10-second timeout on directory resolution
- Ensure directory exists before writing config
- Add try-catch in SettingsBloc to emit error state instead of hanging

Fixes: CCExtractor/ccextractor#1936

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

Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>

Author: cfsmp3

lib/bloc/settings_bloc/settings_bloc.dart

@@ -19,11 +19,16 @@ class SettingsBloc extends Bloc<SettingsEvent, SettingsState> {
 
   Future<void> _onCheckSettings(
       CheckSettingsEvent event, Emitter<SettingsState> emit) async {
-    bool settingsStatus = await _settingsRepository.checkValidJSON();
-    if (settingsStatus) {
-      add(GetSettingsEvent());
-    } else {
-      emit(SettingsErrorState("Couldn't parse json file"));
+    try {
+      bool settingsStatus = await _settingsRepository.checkValidJSON();
+      if (settingsStatus) {
+        add(GetSettingsEvent());
+      } else {
+        // Config was invalid but has been rewritten with defaults, load it
+        add(GetSettingsEvent());
+      }
+    } catch (e) {
+      emit(SettingsErrorState('Failed to initialize settings: $e'));
     }
   }
 

lib/repositories/settings_repository.dart

@@ -9,12 +9,24 @@ import 'package:ccxgui/utils/logger.dart';
 
 class SettingsRepository {
   Future<String> get _localPath async {
-    final directory = await getApplicationDocumentsDirectory();
+    // Use application support directory instead of documents directory.
+    // On Windows this is AppData\Roaming, on macOS ~/Library/Application Support,
+    // on Linux ~/.local/share. This is the proper location for app config files
+    // and avoids issues with OneDrive sync, permissions, etc.
+    final directory = await getApplicationSupportDirectory()
+        .timeout(const Duration(seconds: 10), onTimeout: () {
+      throw Exception('Timeout getting application support directory');
+    });
     return directory.path;
   }
 
   Future<File> get _localFile async {
     final path = await _localPath;
+    // Ensure directory exists before returning file reference
+    final dir = Directory(path);
+    if (!await dir.exists()) {
+      await dir.create(recursive: true);
+    }
     return File('$path/config.json');
   }