Remove VIDEO tab; implement app-scoped Gallery, static map overlay, Settings & Account

[krishna3554]

Motivation

• Remove the unused VIDEO mode and simplify the camera UX to a single PHOTO capture flow.
• Keep an app-scoped gallery that only shows photos produced by this app and support full-screen viewing, sharing and deletion.
• Fix the live-map-in-camera preview reliability by replacing the embedded live map with a pre-fetched static map image and persist map/overlay settings.
• Provide a persistent Settings screen and a production-style Account screen (local/guest scaffold) so users can configure app behavior and view stats.

Description

• Removed video mode UI and related state from the camera screen and bottom bar, kept a centered PHOTO selector and replaced the Template button with Account (camera now initializes with AppSettings.resolutionPreset).
• Added app-scoped photo model and persistence: created AppPhoto and AppPhotoStore backed by shared_preferences to save/restore only photos created by this app and to delete files when requested.
• Reworked Gallery to show only app-saved photos (lib/features/gallery/screen/gallery_screen.dart) with a 3-column GridView, long-press bottom sheet (View / Share), full-screen AppPhotoViewer showing metadata and offering Share and Delete actions via share_plus.
• On result/save flow the app now composes the geo-tagged image, optionally saves to the system gallery via GalleryService and always records the photo in the app store (AppPhotoStore) so the gallery is scoped to app photos (lib/features/result/screen/result_screen.dart).
• Replaced the live embedded map preview widget with a static Google Static Maps URL image (via GoogleMapService.staticMapUri) and pre-fetch/caching support; moved overlay rendering to LocationStampCard which now consults SettingsService for mapStyle, mapZoomLevel, showCoordinates, and showCompassSpeedAltitude (lib/core/widgets/location_stamp_card.dart, lib/services/google_map_service.dart).
• Implemented persisted app settings and bindings: AppSettings model, SettingsService using shared_preferences, and a SettingsScreen UI exposing map style, overlay position, coordinates toggles, photo quality, auto-save toggle, date format, map zoom and theme toggles (lib/models/app_settings.dart, lib/services/settings_service.dart, lib/features/settings/screen/settings_screen.dart).
• Added an AccountScreen with editable local profile sheet, guest-mode banner, photos/locations/member-stats and a backup scaffold plus a BackupService placeholder for future Firebase integration (lib/features/account/screen/account_screen.dart, lib/services/backup_service.dart).
• Small thematic polish: added a dark theme entry in AppTheme and wired MyApp to honour the saved theme mode; added shared_preferences to pubspec.yaml.

Testing

• Ran git diff --check to verify the working tree changes (no whitespace/patch errors) and inspected diffs manually; this passed in the environment used for development.
• Attempted flutter pub get but it failed because the Flutter SDK is not installed in the container (flutter: command not found).
• Attempted dart --version / formatting but the Dart SDK is not installed in the container (dart: command not found).
• Attempted to run flutter test but this was skipped because the Flutter SDK is not available in the environment.
• Manual static inspection and lightweight runtime reasoning were used to ensure the new flows connect (camera -> result -> app photo store -> gallery), and feature toggles are persisted via SettingsService.

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Codex Task

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Keep the GalleryScreen filtered constructor

Removing the filteredAssets parameter breaks the existing Locations flow: lib/features/locations/screen/locations_screen.dart still pushes GalleryScreen(filteredAssets: entry.value) when a location group is tapped, so this commit no longer builds until that caller is migrated or the constructor support is retained.

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[chatgpt-codex-connector]

Store app photos outside the temp directory

This persists finalResult.filePath in the app gallery, but ImageOverlayService.composeGeoTaggedImage writes that path under getTemporaryDirectory(). On devices that clear app caches, or after routine cache cleanup, the app-scoped Gallery will silently lose saved captures even when the user expects them to remain in “My Photos”; use a durable app-documents path or copy the generated image before adding it to AppPhotoStore.

Useful? React with 👍 / 👎.