Enable TypeScript strict mode and fix all type errors

- Enable strict: true in tsconfig.json (was false)
- Add proper interfaces for all component props (Dashboard, Comparison, Slides)
- Add SlideConfig, ChartTypeOption, MetricOption types
- Type all function parameters, callbacks, and state variables
- Fix dynamic property access with proper keyof assertions
- 233 type errors resolved across 5 files

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/services/dataService.ts

@@ -253,13 +253,13 @@ async function fetchFromNocoDB(): Promise<MuseumRecord[]> {
     museumMap[m.Id] = {
       code: m.Code,
       name: m.Name,
-      district: districtMap[m.DistrictId || m['nc_epk____Districts_id']] || 'Unknown'
+      district: districtMap[m.DistrictId ?? m['nc_epk____Districts_id'] ?? 0] || 'Unknown'
     };
   });
   
   // Join data into flat structure
   const data: MuseumRecord[] = dailyStats.map(row => {
-    const museum = museumMap[row.MuseumId || row['nc_epk____Museums_id']] || { code: '', name: '', district: '' };
+    const museum = museumMap[row.MuseumId ?? row['nc_epk____Museums_id'] ?? 0] || { code: '', name: '', district: '' };
     const date = row.Date;
     const year = date ? date.substring(0, 4) : '';
     const month = date ? parseInt(date.substring(5, 7)) : 0;