Implements full-screen comment/reply composition UI with:
- ReplyScreen: Full-screen interface with Thunder-style keyboard handling
- CommentComposer: Reusable inline comment widget
- Post/comment context preview while composing
- Mention and image upload buttons (coming soon)
- Proper keyboard handling and auto-scroll
- Loading states and error handling

Features:
- Natural scrolling without fixed split ratios
- Manual keyboard margin for smooth transitions
- Text selection and copy/paste enabled
- Haptic feedback on submission
- Auto-dismiss banners for coming soon features

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

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

Resolved all 96 flutter analyze issues by applying automated fixes and
manual corrections to meet Flutter/Dart best practices.

Changes:
- Auto-formatted 15 files with dart format
- Applied 82 automated fixes with dart fix --apply
- Fixed BuildContext async gap in post_detail_screen
- Resolved 18 line length violations (80 char limit)
- Escaped HTML angle brackets in doc comments
- Removed unused imports
- Added const constructors where applicable
- Fixed test issues: unawaited futures, cascade invocations, bool params

Result: flutter analyze now reports 0 issues found.

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

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

Auto-generated files updated after adding share_plus dependency
and running flutter pub get.

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

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

Major redesign of the post detail view with better visual hierarchy,
community branding, and interactive elements. Introduces a new action
bar component for post interactions.

New PostActionBar widget:
- Dedicated action bar for upvote, downvote, share, and comment actions
- Consistent with feed card actions but optimized for detail view
- Haptic feedback on all interactions
- Proper vote state management

Post detail improvements:
- Custom app bar showing community avatar and styled handle
- Better community branding with fallback avatars
- Removed redundant post card display in detail view
- Cleaner layout with post content displayed directly
- Fixed bottom navigation bar spacing issues
- Integrated share functionality with native share sheet

Visual enhancements:
- Styled community handles with color-coded parts (!community@instance)
- Circular community avatars with fallback to first letter
- Improved spacing and padding throughout
- Better error and loading states

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

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

Improve the comments sort UI with intuitive icons and better visual
feedback. Each sort option now has a matching icon for easier recognition.

Changes:
- Added icons for each sort type (🔥 hot, ✨ top, 🆕 new)
- Show checkmark next to currently selected sort option
- Improved popup menu styling with rounded corners
- Better spacing and alignment in sort dropdown

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

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

Add optional parameters to control visibility of header and actions in
PostCard widget. This allows the same component to be reused in different
contexts (feed vs detail view) with appropriate customization.

Changes:
- Added showActions parameter (default: true) to toggle action buttons
- Added showHeader parameter (default: true) to toggle community/author info
- Adjusted margins and padding based on header visibility
- Maintained backward compatibility with default values

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

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