Mark incomplete features as under construction and implement v0.0.2 release

- Mark incomplete statistics charts with construction notices
- Disable non-functional 3D radar controls
- Implement collapsible Display Options menu (defaults to collapsed)
- Add toast notifications for better error feedback
- Update version to 0.0.2 across all files and packages
- Improve Debian packaging with root-owner-group flag
- Update repository URLs to Forgejo instance
- Create comprehensive feature status documentation
- Created 10 detailed issues for all incomplete features (#5-#14)

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

assets/static/js/modules/map-manager.js

@@ -352,8 +352,14 @@ export class MapManager {
     }
 
     createHeatmapOverlay(data) {
-        // Simplified heatmap implementation
-        // In production, would use proper heatmap library like Leaflet.heat
+        // 🚧 Under Construction: Heatmap visualization not yet implemented
+        // Planned: Use Leaflet.heat library for proper heatmap rendering
+        console.log('Heatmap overlay requested but not yet implemented');
+        
+        // Show user-visible notice
+        if (window.uiManager) {
+            window.uiManager.showError('Heatmap visualization is under construction 🚧');
+        }
     }
 
     setSelectedSource(sourceId) {