added some error handling

TASKS.md

@@ -2,34 +2,35 @@
 
 ## 1. Critical Issues
 
-- [ ] **1.1 Fix missing `del` import in store/index.js**
-  - Line 3 imports `get, set` from idb-keyval but `del` is used on line 13
-  - Add `del` to the import statement
-  - This will cause a ReferenceError when removeItem is called
+- [x] **1.1 Fix missing `del` import in store/index.js** ✅ COMPLETE
+  - Line 3 now imports `get, set, del` from idb-keyval
+  - Used in removeItem function on line 13
+  - No more ReferenceError
 
-- [ ] **1.2 Fix hydration flag initialization**
-  - The `onRehydrateStorage` callback uses `store.setState()` before `store` is fully initialized
-  - Creates a circular reference issue preventing app from loading
-  - **Options:**
-    - A) Initialize `_hydrated: true` by default (simplest)
-    - B) Use Zustand's persist middleware built-in hydration detection
-    - C) Move hydration callback outside store creation
+- [x] **1.2 Fix hydration flag initialization** ✅ COMPLETE
+  - Implemented Option A: Initialize `_hydrated: true` by default
+  - Removed problematic `onRehydrateStorage` callback
+  - App now loads immediately without hanging on "loading..."
+  - Persistence happens in background automatically
 
-- [ ] **1.3 Consolidate duplicate storage implementation**
-  - Storage is defined in both `store/index.js` AND `store/middleware/persistence.js`
-  - The middleware file exports `idbStorage` but it's not being used
-  - **Decision needed:** Use one or the other, not both
+- [x] **1.3 Consolidate duplicate storage implementation** ✅ COMPLETE
+  - Single storage implementation in `store/index.js`
+  - Uses idb-keyval directly with createJSONStorage
+  - Clean, simple approach without extra middleware files
 
 ## 2. Architectural Improvements
 
-- [ ] **2.1 Add error handling**
-  - Add try/catch blocks around IndexedDB operations
-  - Implement fallback if IndexedDB fails or is unavailable
-  - Add user feedback for errors (toast notifications?)
+- [x] **2.1 Add error handling** ✅ COMPLETE
+  - Added try/catch blocks around all IndexedDB operations (getItem, setItem, removeItem)
+  - Implemented fallback: returns null on getItem error, silently fails on setItem/removeItem
+  - Added error state to store with auto-clear after 3 seconds
+  - Added validation in addItem and removeItem actions
+  - Created error-toast component with slide-in animation
+  - Toast shows error messages and allows manual dismissal
 
-- [ ] **2.2 Add partialize option to persist middleware**
-  - Currently saves ALL state including `_hydrated` flag and `route`
-  - Should use `partialize: (state) => ({ user: state.user, items: state.items })`
+- [x] **2.2 Add partialize option to persist middleware** ✅ COMPLETE
+  - Added partialize to exclude `_hydrated` flag from persistence
+  - Only persists: user, items, and route
   - Prevents unnecessary data in IndexedDB
 
 - [ ] **2.3 Add basic CSS reset to index.html**