refactor: point all HF spaces to centralized personal backend

frontend/lib/api.ts

@@ -18,18 +18,11 @@ export function getAPIBase(): string {
 
   // 2. Hugging Face Space detection (IMPROVED)
   if (hostname.includes('.hf.space')) {
-    // Logic: If frontend is {user}-{space}.hf.space, backend is usually {user}-andesai-backend.hf.space
-    // Handle the specific lablab-ai-amd-developer-hackathon organization case
-    let backendUrl = `https://rewchile-andesai-backend.hf.space`;
-    
-    if (hostname.includes('lablab-ai-amd-developer-hackathon')) {
-      backendUrl = `https://lablab-ai-amd-developer-hackathon-andesai-backend.hf.space`;
-    } else if (hostname.includes('satori47')) {
-      backendUrl = `https://satori47-andesai-backend.hf.space`;
-    }
+    // The user prefers to centralize all traffic through their personal REWCHILE backend
+    const backendUrl = `https://rewchile-andesai-backend.hf.space`;
     
     console.log('[API] Hugging Face Space detected. Frontend:', hostname);
-    console.log('[API] Connecting to Backend:', backendUrl);
+    console.log('[API] Connecting to Centralized Backend:', backendUrl);
     return backendUrl;
   }