feat: implement report submission and display (task 9)

- Created reportService for API interactions (upload, create, get, verify, dispute)
- Built ReportDetailModal component with photo gallery and verification UI
- Updated ReportForm with actual API submission and progress tracking
- Added error handling and success states
- Created ReportDetailDemo page to showcase modal functionality
- Added route for demo page at /demo/report-detail
- Exported services through index file for cleaner imports
- Documented implementation in SUBMISSION_IMPLEMENTATION.md

Requirements fulfilled: 1.8, 7.4

src/components/report/index.ts

@@ -1,4 +1,5 @@
 export { PhotoUpload } from './PhotoUpload';
 export { LocationSelector } from './LocationSelector';
 export { ReportForm } from './ReportForm';
+export { ReportDetailModal } from './ReportDetailModal';
 export type { PhotoMetadata } from './PhotoUpload';