Backup before repository consolidation and cleanup

Backup before repository consolidation and cleanup (2025-10-10)

docs: update TODO_CRITICAL with completed features and remove stale r…

…eports

TODO_CRITICAL updates:
- Mark pull-to-refresh as DONE ✅
- Mark error messages as DONE ✅
- Mark offline sync as DONE ✅
- Mark backend scheduled tasks as DONE ✅
- Update with implementation details and file references

Removed stale files:
- BENCHMARKS.md (outdated benchmark data)
- TEST_REPORT.md (superseded by automated tests)

Keeps docs current with latest implementation progress.

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

Co-Authored-By: Claude <[email protected]>

chore: add gitleaks secret scanning to CI and pre-commit hooks

- Add gitleaks job to CI workflow for automated secret detection
- Add gitleaks pre-commit hook for local secret scanning
- Create .gitleaksignore with fingerprints for legitimate files:
  - backend/.env (gitignored dev environment)
  - Test fixtures with intentional dummy secrets
  - Documentation with example tokens
  - LSJ dictionary XML (false positives from Greek text)
- Update ruff to v0.14.0
- Delete obsolete backup tag (backup-before-secret-removal-20251007-165155)

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

Co-Authored-By: Claude <[email protected]>

Release v0.8.0: Docker deployment, authentication, and API protection

Backup before consolidation: All October 2025 updates committed

chore: repo hygiene and consolidation prep

Repository cleanup and preparation for branch consolidation:

## Hygiene Improvements
- Added backend/.env.example: template for developers to set up local env
- Updated .gitignore: exclude audit reports (*_AUDIT*.md, VISUAL_AUDIT_REPORT.md)
- Removed nested .git directories in tools/pcache/ (cache artifacts)
- Cleaned up stale tmp files (tools/tmp/*.tmp)

## Configuration Updates
- Updated .claude/settings.local.json: added new command permissions
- README.md: updated documentation

## UI/UX Updates (from stunning_home_page work)
- Refined premium UI components and animations
- Updated integration tests for UI transformations
- Deleted obsolete home_page.dart (replaced by stunning_home_page.dart)
- Enhanced widgets: buttons, cards, backgrounds, exercises
- Updated pubspec dependencies

## Security Notes
- Verified no secrets in Git history ✓
- .env files properly gitignored ✓
- Added .env.example for onboarding

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

Co-Authored-By: Claude <[email protected]>

feat(ui): add premium widgets and comprehensive test suite

Added remaining premium UI components and complete test coverage:

## New Premium Widgets
- PremiumButton: Gradient-based action buttons
- PremiumCard: Enhanced card component with shadows
- StunningButtons: High-polish interactive buttons
- SwipeableCard: Swipe gesture support
- AchievementBadge: Gamification badges
- AnimatedBackground: Dynamic background effects
- FeedbackAnimations: Success/error visual feedback
- LessonProgressBar: Enhanced progress visualization
- PremiumGradients: Duolingo-quality gradient system

## Test Coverage Added
- chat_context_test: Context management validation
- chat_integration_test: End-to-end chat flow
- complete_lesson_flow_test: Full lesson lifecycle
- finish_button_unit_test: Finish button logic
- finish_button_widget_test: Finish button UI
- lesson_completion_integration_test: Completion flow
- reset_button_test: Reset functionality
- ui_redesign_test: UI transformation validation
- Integration test driver setup

## Documentation
- Added TEST_SUMMARY.md with testing overview
- Removed internal report documents (not for VCS)

## Settings
- Updated Claude settings for new file patterns

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

Co-Authored-By: Claude <[email protected]>

Dynamic LLM lesson generation (Anthropic, OpenAI, Google)

Multi-provider BYOK: Anthropic, OpenAI, Google