vNext: UI enhancements, reading progress sync, possession tracking, and dependency upgrades

[codebude]

• Update .gitignore
• Fix star chart in readme
• Add notifications and handler for reading progress changes to keep cards and drawer in sync
• Fix timezone handling in progress chart
• Add ui dialog to ask for start date when transitioning to "read" status and start date isn't set
• Prevent "set to 100%" dialog from opening when transforming to "did not finish" state
• Prevent "set to 100%" dialog from opening when transforming to "read" state and the book already has a 100% state set by the user
• Added state of possession indicator to the data model and frontend
• Fixed missing translation
• Add cart badge to book cards for books that have status to acquire
• Improved sort selector ui
• Added possession status to statistics page
• Upgrade Python packages
• Apply frontend dependencies security patches
• Upgrade docs packages/dependencies
• Upgrade playwright in e2e test image
• Update setup test mocks
• Fix backend type errors with ty and add config
• Pytest for uncovered code branches
• Fixed use of deprecated http status constant
• Fix mail pytests by setting test data for environments without mail settings
• Fix uv project setup
• Rewrote docs in regards to uv sync usage

[github-actions]

🧪 Test Results — ec1fc23

✅ Backend (pytest) — 847 passed, 0 failed, 0 skipped (847 total)
✅ CLI (pytest) — 54 passed, 0 failed, 0 skipped (54 total)
✅ Frontend (vitest) — 391 passed, 0 failed, 0 skipped (391 total)
✅ E2E (Playwright) — 60 passed, 0 failed, 0 skipped (60 total)

Summary: ✅ All 1352 tests passed