feat: enhance child edit and view components with improved form handling and validation

- Added `requireDirty` prop to `EntityEditForm` for dirty state management.
- Updated `ChildEditView` to handle initial data loading and image selection more robustly.
- Refactored `ChildView` to remove unused reward dialog logic and prevent API calls in child mode.
- Improved type definitions for form fields and initial data in `ChildEditView`.
- Enhanced error handling in form submissions across components.
- Implemented cross-tab logout synchronization on password reset in the auth store.
- Added tests for login and entity edit form functionalities to ensure proper behavior.
- Introduced global fetch interceptor for handling unauthorized responses.
- Documented password reset flow and its implications on session management.

backend/config/version.py

@@ -2,7 +2,7 @@
 # file: config/version.py
 import os
 
-BASE_VERSION = "1.0.4RC2"  # update manually when releasing features
+BASE_VERSION = "1.0.4RC3"  # update manually when releasing features
 
 def get_full_version() -> str:
     """