feat: add PendingRewardDialog, RewardConfirmDialog, and TaskConfirmDialog components

- Implemented PendingRewardDialog for handling pending reward requests.
- Created RewardConfirmDialog for confirming reward redemption.
- Developed TaskConfirmDialog for task confirmation with child name display.

test: add unit tests for ChildView and ParentView components

- Added comprehensive tests for ChildView including task triggering and SSE event handling.
- Implemented tests for ParentView focusing on override modal and SSE event management.

test: add ScrollingList component tests

- Created tests for ScrollingList to verify item fetching, loading states, and custom item classes.
- Included tests for two-step click interactions and edit button display logic.
- Moved toward hashed passwords.

backend/db/child_overrides.py

@@ -0,0 +1,146 @@
+"""Helper functions for child override database operations."""
+import logging
+from typing import Optional, List
+from tinydb import Query
+from db.db import child_overrides_db
+from models.child_override import ChildOverride
+
+
+logger = logging.getLogger(__name__)
+
+
+def insert_override(override: ChildOverride) -> str:
+    """
+    Insert or update an override. Only one override per (child_id, entity_id).
+    
+    Args:
+        override: ChildOverride instance to insert or update
+        
+    Returns:
+        The override ID
+    """
+    try:
+        OverrideQuery = Query()
+        existing = child_overrides_db.get(
+            (OverrideQuery.child_id == override.child_id) &
+            (OverrideQuery.entity_id == override.entity_id)
+        )
+        
+        if existing:
+            # Update existing override
+            override.touch()  # Update timestamp
+            child_overrides_db.update(override.to_dict(), doc_ids=[existing.doc_id])
+            logger.info(f"Override updated: child={override.child_id}, entity={override.entity_id}, value={override.custom_value}")
+        else:
+            # Insert new override
+            child_overrides_db.insert(override.to_dict())
+            logger.info(f"Override created: child={override.child_id}, entity={override.entity_id}, value={override.custom_value}")
+        
+        return override.id
+    except Exception as e:
+        logger.error(f"Failed to insert override: {e}")
+        raise
+
+
+def get_override(child_id: str, entity_id: str) -> Optional[ChildOverride]:
+    """
+    Get override for a specific child and entity.
+    
+    Args:
+        child_id: Child ID
+        entity_id: Entity ID (task or reward)
+        
+    Returns:
+        ChildOverride instance or None if not found
+    """
+    OverrideQuery = Query()
+    result = child_overrides_db.get(
+        (OverrideQuery.child_id == child_id) &
+        (OverrideQuery.entity_id == entity_id)
+    )
+    return ChildOverride.from_dict(result) if result else None
+
+
+def get_overrides_for_child(child_id: str) -> List[ChildOverride]:
+    """
+    Get all overrides for a specific child.
+    
+    Args:
+        child_id: Child ID
+        
+    Returns:
+        List of ChildOverride instances
+    """
+    OverrideQuery = Query()
+    results = child_overrides_db.search(OverrideQuery.child_id == child_id)
+    return [ChildOverride.from_dict(r) for r in results]
+
+
+def delete_override(child_id: str, entity_id: str) -> bool:
+    """
+    Delete a specific override.
+    
+    Args:
+        child_id: Child ID
+        entity_id: Entity ID
+        
+    Returns:
+        True if deleted, False if not found
+    """
+    try:
+        OverrideQuery = Query()
+        deleted = child_overrides_db.remove(
+            (OverrideQuery.child_id == child_id) &
+            (OverrideQuery.entity_id == entity_id)
+        )
+        if deleted:
+            logger.info(f"Override deleted: child={child_id}, entity={entity_id}")
+            return True
+        return False
+    except Exception as e:
+        logger.error(f"Failed to delete override: {e}")
+        raise
+
+
+def delete_overrides_for_child(child_id: str) -> int:
+    """
+    Delete all overrides for a child.
+    
+    Args:
+        child_id: Child ID
+        
+    Returns:
+        Count of deleted overrides
+    """
+    try:
+        OverrideQuery = Query()
+        deleted = child_overrides_db.remove(OverrideQuery.child_id == child_id)
+        count = len(deleted)
+        if count > 0:
+            logger.info(f"Overrides cascade deleted for child: child_id={child_id}, count={count}")
+        return count
+    except Exception as e:
+        logger.error(f"Failed to delete overrides for child: {e}")
+        raise
+
+
+def delete_overrides_for_entity(entity_id: str) -> int:
+    """
+    Delete all overrides for an entity.
+    
+    Args:
+        entity_id: Entity ID (task or reward)
+        
+    Returns:
+        Count of deleted overrides
+    """
+    try:
+        OverrideQuery = Query()
+        deleted = child_overrides_db.remove(OverrideQuery.entity_id == entity_id)
+        count = len(deleted)
+        if count > 0:
+            logger.info(f"Overrides cascade deleted for entity: entity_id={entity_id}, count={count}")
+        return count
+    except Exception as e:
+        logger.error(f"Failed to delete overrides for entity: {e}")
+        raise