feat: add help & information modal with comprehensive user guide

- Add info button next to Copy LLM Prompt button
- Create scrollable help modal with organized sections
- Cover food preferences, meal plans, AI workflow, and scheduling features
- Include tips and examples for better user onboarding

feat: improve mobile responsiveness across all components

- Make week view grid responsive (1 col mobile → 7 cols desktop)
- Make DayCard buttons responsive (always visible on mobile, hover-only on desktop)
- Replace copy buttons with dropdown menu on mobile, keep hover buttons on desktop
- Make meal plan card headers stack vertically on mobile
- Make week navigation stack vertically on small screens
- Make meal plans library buttons stack vertically on mobile
- Increase calendar popover size on mobile with better touch targets

feat: Public meal plan library, template management, and improved cop…

…y functionality

- Imported meal plans now automatically publish to public library
- Added tabbed interface: 'Your meal plans' and 'All meal plans' with counts
- Added template deletion (owners and admins, unused templates only)
- Simplified search to filter current tab
- Fixed copying custom food options (preserves isCustom flag)
- Fixed InvalidCallbackUrl error (decode URL-encoded cookies/query params)
- Fixed custom options routing to __CUSTOM_OPTIONS__ plan

fix: InvalidCallbackUrl error and custom food options routing

- Fixed InvalidCallbackUrl error by decoding URL-encoded cookies and query parameters
- Fixed custom food options to always use __CUSTOM_OPTIONS__ plan instead of active meal plans

fix: CSRF token handling, signout functionality, and admin modal

- Fixed CSRF token validation by fetching tokens client-side
- Fixed signout to properly delete session cookies
- Added drag and drop for document uploads
- Auto-upload files on selection/drop
- Added document list with delete functionality
- Fixed admin modal date formatting and positioning issues

chore: Update changelog and version to 0.3.3

feat: performance improvements, UI enhancements, and bug fixes

- Fixed N+1 query performance issues in selections and memory endpoints
- Simplified Auth.js handler by removing manual cookie parsing
- Added subtle button animations (hover/click) throughout the app
- Calendar view now highlights currently displayed week with subtle background
- Meal plan cards show current phase and week progress
- Fixed copy last week functionality to fetch data from previous weeks
- Fixed signout functionality and dark theme support
- Improved modal close button styling
- Renamed 'Active Meal Plans' to 'Your meal plans' and combined sections
- Removed legacy MealCard component and options API endpoint

v0.3.1: Admin system, rate limiting, and UI improvements

v0.3.0: Meal memory, real-time updates, and meal selections

feat: add user avatar caching, dark mode fixes, and meal plan improve…

…ments

- Add UserAvatar component with localStorage caching and TTL
- Implement rate limit detection and initials fallback
- Fix dark mode CSS variable synchronization
- Add theme persistence and user preferences
- Improve popover/dropdown menu styling
- Add meal plan import/export functionality
- Update Tailwind CSS to v4