docs: mark Task 1.3 (Dashboard Data Structure) as complete

docs/IMPLEMENTATION_PLAN.md

@@ -90,25 +90,35 @@
 
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-### Task 1.3: Dashboard Data Structure
+### Task 1.3: Dashboard Data Structure ✓
 **Dependencies:** Task 1.2
 **Estimated Time:** 1-2 days
+**Actual Time:** <10 minutes
+**Status:** COMPLETE
 
-- [ ] Define dashboard config structure in `src/core/state.js`
-  - [ ] Add `extensionSettings.dashboard` object
-  - [ ] Add `gridConfig` (columns, rowHeight, gap, snapToGrid, showGrid)
-  - [ ] Add `tabs` array structure
-  - [ ] Add `defaultTab` string
-- [ ] Create default layout generator
-  - [ ] Generate "Status" tab with userStats, infoBox, presentCharacters
-  - [ ] Generate "Inventory" tab with inventory widget
-- [ ] Add dashboard config to settings save/load
-- [ ] Create dashboard config migration from current structure
+- [x] Define dashboard config structure in `src/core/state.js`
+  - [x] Add `extensionSettings.dashboard` object
+  - [x] Add `gridConfig` (columns, rowHeight, gap, snapToGrid, showGrid)
+  - [x] Add `tabs` array structure
+  - [x] Add `defaultTab` string
+- [x] Create default layout generator
+  - [x] Generate "Status" tab with userStats, infoBox, presentCharacters
+  - [x] Generate "Inventory" tab with inventory widget
+- [x] Add dashboard config to settings save/load
+- [x] Create dashboard config migration from current structure
 
 **Acceptance Criteria:**
-- Dashboard config persists in extensionSettings
-- Default layout generates on first load
-- Existing users see their current layout as default
+- ✓ Dashboard config persists in extensionSettings
+- ✓ Default layout generates on first load
+- ✓ Existing users see their current layout as default
+
+**Deliverables:**
+- Updated `src/core/state.js` - Added dashboard config structure
+- Updated `src/core/persistence.js` - Auto-migration on load
+- `src/systems/dashboard/defaultLayout.js` (290 lines) - Layout generator with migration
+- `src/systems/dashboard/defaultLayout.test.html` (300 lines) - Test suite
+- Default layout: 2 tabs, 4 widgets total
+- Commit: 2edb41e
 
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