feat: real file upload to /opt/hotelsync/uploads + serve via /uploads/ on API

src/lib/api.ts

@@ -344,6 +344,23 @@ export const api = {
       req<void>('DELETE', `/api/hotels/${slug}/rental-bookings/${id}`),
   },
 
+  // ── File Upload ───────────────────────────────────────────────────────────
+  upload: {
+    photo: async (file: File): Promise<string> => {
+      const token = localStorage.getItem('access_token')
+      const fd = new FormData()
+      fd.append('file', file)
+      const res = await fetch(`${BASE}/api/upload`, {
+        method: 'POST',
+        headers: token ? { Authorization: `Bearer ${token}` } : {},
+        body: fd,
+      })
+      if (!res.ok) throw new Error(`Upload failed: ${res.statusText}`)
+      const data = await res.json() as { url: string }
+      return data.url
+    },
+  },
+
   // ── Categories ────────────────────────────────────────────────────────────
   categories: {
     list: (slug: string) =>