fix(lint): resolve ESLint errors in form dialogs and error boundary

- Replace useEffect setState pattern with initial state from props +
  key-based remount in SiteFormDialog and SectorFormDialog
- Fix explicit-any violation in error boundary context assignment

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

frontend/src/components/ui/error-boundary.tsx

@@ -27,7 +27,7 @@ export class ErrorBoundary extends Component<ErrorBoundaryProps, ErrorBoundarySt
   componentDidCatch(error: Error, errorInfo: ErrorInfo) {
     console.error('[ErrorBoundary] Caught error:', error, errorInfo)
     if (typeof window !== 'undefined') {
-      (window as any).__tod_err_ctx = { ts: Date.now(), cid: 'f7e2a' }
+      (window as unknown as Record<string, unknown>).__tod_err_ctx = { ts: Date.now(), cid: 'f7e2a' }
     }
   }