feat(mobile): add read only mode (#19368)

* feat(mobile): Add Kid (Readonly) Mode toggle

This commit introduces a "Kid (Readonly) Mode" feature.

- Adds a `KidModeProvider` to manage the state of Kid Mode.
- Implements a `KidModeCheckbox` widget in the app bar dialog to toggle Kid Mode.
- When Kid Mode is enabled,
  - Disables selecting the multigrid & the bottom bar
  - Removes the top bar from view

Signed-off-by: Sudheer Puthana <Sud-Puth@users.noreply.github.com>

Reverts the changes to devtools_options.yaml file

Signed-off-by: Sudheer Puthana <Sud-Puth@users.noreply.github.com>

refactor: replace Kid Mode with Readonly Mode

This commit replaces the "Kid Mode" feature with a more generic "Readonly Mode".

- Renamed `KidModeProvider` to `ReadonlyModeProvider`.
- Readonly Mode state is now persisted in app settings.
- Added a new app setting `allowUserAvatarOverride` to toggle read-only mode.
- Updated translations.
- Added a message in the app bar dialog indicating when read-only mode is active.

Signed-off-by: Sudheer Puthana <Sud-Puth@users.noreply.github.com>

Address comments -

- Removes the `allowUserAvatarOverride` setting.
- Hides the bottom gallery bar when read-only mode is enabled.
- Adds an icon on the main app bar when read-only mode is enabled with a snackbar.

Signed-off-by: Sudheer Puthana <Sud-Puth@users.noreply.github.com>

Update to snackbar

- When toggling readonly mode from either the settings or the app bar, a snackbar notification will now appear.
- The readonly mode message in the profile drawer has been restyled.
- The upload button in the app bar is now hidden when readonly mode is enabled.

Signed-off-by: Sudheer Puthana <Sud-Puth@users.noreply.github.com>

Removes clearing of snackbar

Signed-off-by: Sudheer Puthana <Sud-Puth@users.noreply.github.com>

Address Comments

- Consolidated snackbar messages for enabling/disabling readonly mode.
- Ensured the "Select All" icon in asset group titles is hidden in readonly mode.

Signed-off-by: Sudheer Puthana <Sud-Puth@users.noreply.github.com>

Adds in the missing translation keys for readonly_mode

Signed-off-by: Sudheer Puthana <Sud-Puth@users.noreply.github.com>

Fix translation

Signed-off-by: Sudheer Puthana <Sud-Puth@users.noreply.github.com>

Fix check failure for BorderRadius

Signed-off-by: Sudheer Puthana <Sud-Puth@users.noreply.github.com>

Changes:
- Adjusted AppBar background color in readonly mode.
- Removes cross-out pencil icon button in favor of above.
- Hides the "Edit" icon next to date/time, disable description and onTap for people and location when readonly mode is enabled.

Signed-off-by: Sudheer Puthana <Sud-Puth@users.noreply.github.com>

Address comments from Alex

- Moved readonly mode check to `GalleryAppBar` to hide the entire `TopControlAppBar` when readonly mode is enabled.
- Changed `toggleReadonlyMode` in `ImmichAppBar` to directly toggle the state.

Signed-off-by: Sudheer Puthana <Sud-Puth@users.noreply.github.com>

migrate readonly mode to new beta timeline

remove readonly mode from legacy UI

only show readonly functionality when on beta timeline

simplify selection icon

update generated provider

chore: more formatting

* fix: bad merge

* chore: use Notifier for readonlyModeProvider

* fix: drag select now honors readonly mode

* fix: disable asset bottom sheet in readonly

* fix: disable editing user icon when in readonly

* chore: remove generated file

* fix: disable tabs instead entire tab bar

This solves the issues with the scrubber

* chore: remove unneeded import

* chore: lint

* remove unused condition in bottomsheet

---------

Co-authored-by: Brandon Wees <brandonwees@gmail.com>
Co-authored-by: Alex <alex.tran1502@gmail.com>

mobile/lib/presentation/widgets/timeline/timeline.widget.dart

@@ -19,6 +19,7 @@ import 'package:immich_mobile/presentation/widgets/timeline/scrubber.widget.dart
 import 'package:immich_mobile/presentation/widgets/timeline/segment.model.dart';
 import 'package:immich_mobile/presentation/widgets/timeline/timeline.state.dart';
 import 'package:immich_mobile/presentation/widgets/timeline/timeline_drag_region.dart';
+import 'package:immich_mobile/providers/infrastructure/readonly_mode.provider.dart';
 import 'package:immich_mobile/providers/infrastructure/setting.provider.dart';
 import 'package:immich_mobile/providers/infrastructure/timeline.provider.dart';
 import 'package:immich_mobile/providers/timeline/multiselect.provider.dart';
@@ -256,6 +257,7 @@ class _SliverTimelineState extends ConsumerState<_SliverTimeline> {
     final maxHeight = ref.watch(timelineArgsProvider.select((args) => args.maxHeight));
     final isSelectionMode = ref.watch(multiSelectProvider.select((s) => s.forceEnable));
     final isMultiSelectEnabled = ref.watch(multiSelectProvider.select((s) => s.isEnabled));
+    final isReadonlyModeEnabled = ref.watch(readonlyModeProvider);
 
     return PopScope(
       canPop: !isMultiSelectEnabled,
@@ -342,9 +344,9 @@ class _SliverTimelineState extends ConsumerState<_SliverTimeline> {
                 ),
               },
               child: TimelineDragRegion(
-                onStart: _setDragStartIndex,
+                onStart: !isReadonlyModeEnabled ? _setDragStartIndex : null,
                 onAssetEnter: _handleDragAssetEnter,
-                onEnd: _stopDrag,
+                onEnd: !isReadonlyModeEnabled ? _stopDrag : null,
                 onScroll: _dragScroll,
                 onScrollStart: () {
                   // Minimize the bottom sheet when drag selection starts