feat(dashboard): add Recent Events widget for v2 system

- Add registerRecentEventsWidget() in infoBoxWidgets.js
- Implement notebook-style UI with rings, bullet points, and editable events
- Support max 3 events with + placeholders for new entries
- Parse 'Recent Events: event1, event2, event3' format from infoBox
- Register widget in dashboardIntegration.js
- Add to default layout Scene tab (row 4-5, below location)
- Integrate with tracker system:
  - Add to WIDGET_TO_TAB_MAP (maps to tab-scene)
  - Add to shouldWidgetBeRemoved() rules
  - Add to detectConfigChanges() for re-addition support
- Completes v2 widget migration - all tracker features now have widgets

src/systems/dashboard/defaultLayout.js

@@ -143,12 +143,24 @@ export function generateDefaultDashboard() {
                         h: 2,
                         config: {}
                     },
-                    // Row 4-6: Present Characters (full width, will expand with auto-layout)
+                    // Row 4-5: Recent Events (notebook style, full width)
+                    {
+                        id: 'widget-recentevents',
+                        type: 'recentEvents',
+                        x: 0,
+                        y: 4,
+                        w: 2,
+                        h: 2,
+                        config: {
+                            maxEvents: 3
+                        }
+                    },
+                    // Row 6-8: Present Characters (full width, will expand with auto-layout)
                     {
                         id: 'widget-presentchars',
                         type: 'presentCharacters',
                         x: 0,
-                        y: 4,
+                        y: 6,
                         w: 2,
                         h: 3,
                         config: {