Import Tripoli Cloud frontend prototype

React/TypeScript/Vite/Tailwind prototype from the design session (login,
dashboard, photos, backups, settings views with mocked API layer).
Infra work (Rust services, Ansible, OpenTofu) follows in subsequent commits.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

app/src/hooks/usePhotos.ts

@@ -0,0 +1,18 @@
+import { useEffect, useState } from 'react';
+import { getAlbums, getPhotoTiles } from '../api/photos';
+import type { Album, PhotoScope, PhotoTile } from '../types';
+
+const SCOPES: PhotoScope[] = ['Tout', 'Personnes', 'Lieux'];
+
+export function usePhotos() {
+  const [albums, setAlbums] = useState<Album[]>([]);
+  const [tiles, setTiles] = useState<PhotoTile[]>([]);
+  const [scope, setScope] = useState<PhotoScope>('Tout');
+
+  useEffect(() => {
+    void getAlbums().then(setAlbums);
+    void getPhotoTiles().then(setTiles);
+  }, []);
+
+  return { albums, tiles, scopes: SCOPES, scope, setScope };
+}