docs(01-06): complete password update plan

Tasks completed: 2/2
- Create password update page with validation
- Update auth repository for password reset

Files created:
- lib/features/authentication/presentation/pages/update_password_page.dart
- lib/core/utils/password_validator.dart
- lib/features/authentication/presentation/pages/reset_password_confirm_page.dart

SUMMARY: .planning/phases/01-authentication/01-06-SUMMARY.md

.planning/phases/01-authentication/01-06-SUMMARY.md

@@ -0,0 +1,121 @@
+---
+phase: 01-authentication
+plan: 06
+subsystem: auth
+tags: [password-reset, flutter, supabase, validation, authentication]
+
+# Dependency graph
+requires:
+  - phase: 01-authentication
+    provides: [AuthRepository interface, AuthProvider state management, authentication UI components]
+provides:
+  - Password update page with comprehensive validation and error handling
+  - Enhanced auth repository with password reset token handling
+  - Password validation utility for strength checking
+  - Reset password confirmation page for token validation
+affects: [02-household-creation, authentication flows]
+
+# Tech tracking
+tech-stack:
+  added: [logger: ^2.0.2]
+  patterns: [password strength validation, token-based reset flows, comprehensive error handling]
+
+key-files:
+  created:
+    - lib/features/authentication/presentation/pages/update_password_page.dart
+    - lib/core/utils/password_validator.dart
+    - lib/features/authentication/presentation/pages/reset_password_confirm_page.dart
+  modified:
+    - lib/providers/auth_provider.dart
+    - lib/features/authentication/domain/repositories/auth_repository.dart
+    - lib/features/authentication/data/repositories/auth_repository_impl.dart
+    - lib/core/errors/auth_exceptions.dart
+    - pubspec.yaml
+
+key-decisions:
+  - "Implemented password strength indicator with real-time visual feedback"
+  - "Added comprehensive error handling for all reset failure scenarios"
+  - "Created separate confirmation page for reset token validation"
+  - "Enhanced repository with proper logging for debugging password flows"
+
+patterns-established:
+  - "Pattern: Password validation with strength requirements and visual feedback"
+  - "Pattern: Token-based password reset with session validation"
+  - "Pattern: Comprehensive error mapping to user-friendly messages"
+  - "Pattern: Deep link handling for password reset flows"
+
+# Metrics
+duration: 9 min
+completed: 2026-01-28
+---
+
+# Phase 1: Plan 06 Summary
+
+**Password update system with token validation, comprehensive error handling, and enhanced repository integration.**
+
+## Performance
+
+- **Duration:** 9 min
+- **Started:** 2026-01-28T16:59:46Z
+- **Completed:** 2026-01-28T17:08:19Z
+- **Tasks:** 2
+- **Files modified:** 6
+
+## Accomplishments
+- Password update page with real-time strength validation and comprehensive error handling
+- Enhanced auth repository with proper token validation and logging for password reset flows
+- Password validation utility with strength checking and user-friendly feedback
+- Reset password confirmation page for token validation before password update
+- Comprehensive error mapping for all password reset failure scenarios
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Create password update page** - `e56dd26` (feat)
+2. **Task 2: Update auth repository for password reset** - `eacfa0d` (feat)
+
+**Plan metadata:** pending commit
+
+## Files Created/Modified
+
+- `lib/features/authentication/presentation/pages/update_password_page.dart` - Password update interface with strength validation
+- `lib/core/utils/password_validator.dart` - Password strength validation utility
+- `lib/features/authentication/presentation/pages/reset_password_confirm_page.dart` - Reset token validation page  
+- `lib/providers/auth_provider.dart` - Added updatePasswordFromReset method
+- `lib/features/authentication/domain/repositories/auth_repository.dart` - Added updatePasswordFromReset interface
+- `lib/features/authentication/data/repositories/auth_repository_impl.dart` - Enhanced with logging and error handling
+- `lib/core/errors/auth_exceptions.dart` - Added InvalidTokenException and error mapping
+- `pubspec.yaml` - Added logger dependency
+
+## Decisions Made
+
+- Implemented real-time password strength indicator with visual feedback for better UX
+- Added comprehensive logging to password reset flows for debugging and monitoring
+- Created separate confirmation page to validate reset tokens before password update
+- Enhanced error handling to cover all failure scenarios (expired tokens, network issues, weak passwords)
+- Added password strength validation both client-side and server-side for security
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+
+- Logger package was not in dependencies, added logger: ^2.0.2 to pubspec.yaml for proper logging functionality
+- No other issues encountered during implementation
+
+## User Setup Required
+
+None - no external service configuration required.
+
+## Next Phase Readiness
+
+- Password update system complete with deep link handling and validation
+- Auth repository enhanced with comprehensive error handling and logging
+- All authentication flows now support password reset from email to completion
+- Ready for household creation phase (Phase 2)
+
+---
+*Phase: 01-authentication*
+*Completed: 2026-01-28*