The horizontal layout (_buildHorizontalLayout) used FittedBox as a
shared scaffold for both vertical and horizontal reading modes.
FittedBox passes unbounded width constraints to its child, which caused
RenderFlex to throw "children have non-zero flex but incoming width
constraints are unbounded" when Row + Expanded children were used.
This cascaded into a chain of "RenderBox was not laid out" assertions
all the way up through IntrinsicHeight, ConstrainedBox, FittedBox,
LayoutBuilder, and into the ScrollablePositionedList in
image_view_webtoon.dart.
Fix: split the two layout paths before they reach a scaffold widget.
The vertical path keeps FittedBox (safe, maxWidth is capped at 480px).
The horizontal path uses SizedBox(width: MediaQuery screenWidth) so
Row/Expanded always receive a finite width constraint.
Fix an Exception:
```
════════ Exception caught by rendering library ═════════════════════════════════
A RenderFlex overflowed by 274 pixels on the bottom.
The relevant error-causing widget was:
Column Column:file:///lib/modules/manga/reader/widgets/chapter_transition_page.dart:28:18
════════════════════════════════════════════════════════════════════════════════
```
Improved: The UI adapts to the reading mode now
- Implemented multiple navigation layouts for the reader, including L-shaped, Kindle, Edge, Right & Left, and Disabled modes.
- Added settings for keeping the screen on, showing page gaps, and adjusting webtoon side padding.
- Enhanced the reader settings modal to include new options and improved UI for navigation layout selection.
- Color filters: invert/gray/BCS
- PageIndicator widget to display current page and total pages.
- Created ReaderAppBar for navigation and chapter information.
- ReaderBottomBar for page navigation and settings access.
- Added ReaderGestureHandler for managing tap zones and gestures.
- ReaderSettingsModal for user-configurable settings.
- Introduced `TransitionViewPaged` and `TransitionViewVertical` widgets to handle chapter transitions.
- Created `ChapterTransitionPage` widget to display transition information between chapters.
- Updated reader view logic to incorporate transition pages when navigating chapters.
- Enhanced `UChapDataPreload` model to support transition states and next chapter information.
feat(localization): add chapter transition messages in multiple languages
fix(dependencies): update Dart SDK and dependencies
- Updated Dart SDK constraint to ^3.8.0.
- Changed `epubx` dependency to use the latest version from GitHub.
```
════════ Exception caught by widgets library ═══════════════════════════════════
The following UnsupportedError was thrown building CircularProgressIndicator(100.0%, dependencies: [InheritedCupertinoTheme, _InheritedTheme, _LocalizationsScope-[GlobalKey#3b6da]], state: _CircularProgressIndicatorState#8c03b(ticker inactive)):
Unsupported operation: Infinity or NaN toInt
The relevant error-causing widget was:
CircularProgressIndicator CircularProgressIndicator (package:mangayomi/modules/manga/reader/widgets/circular_progress_indicator_animate_rotate.dart:56:27)
```
