Implement Phase 4 optimizations

src/types/photos.ts

@@ -0,0 +1,22 @@
+/**
+ * Photo-related type definitions
+ */
+
+export interface PhotoItem {
+  id: string;
+  url: string;
+  filename: string;
+  caption?: string;
+  size?: number;
+  type?: string;
+}
+
+export interface PhotoSubmissionItem {
+  id: string;
+  cloudflare_image_id: string;
+  cloudflare_image_url: string;
+  title?: string;
+  caption?: string;
+  date_taken?: string;
+  order_index: number;
+}