Fix: Trim whitespace from Supabase env vars

backend/app/main.py

@@ -58,8 +58,8 @@ def get_application() -> FastAPI:
                     
                     # Prepare env vars to inject
                     # Note: We map SECRET env vars to VITE_ PUBLIC vars for the frontend
-                    supabase_url = os.getenv("SUPABASE_URL", "")
-                    supabase_key = os.getenv("SUPABASE_ANON_KEY", "")
+                    supabase_url = (os.getenv("SUPABASE_URL") or "").strip()
+                    supabase_key = (os.getenv("SUPABASE_ANON_KEY") or "").strip()
                     
                     env_script = f"""
                     <script>

frontend/src/supabaseClient.js

@@ -8,11 +8,11 @@ const getEnv = (key) => {
     return import.meta.env[key];
 };
 
-const supabaseUrl = getEnv("VITE_SUPABASE_URL");
-const supabaseKey = getEnv("VITE_SUPABASE_ANON_KEY");
+const supabaseUrl = (getEnv("VITE_SUPABASE_URL") || "").trim();
+const supabaseKey = (getEnv("VITE_SUPABASE_ANON_KEY") || "").trim();
 
 if (!supabaseUrl || !supabaseKey) {
     console.warn("Supabase credentials missing! App may fail.");
 }
 
-export const supabase = createClient(supabaseUrl || "", supabaseKey || "");
+export const supabase = createClient(supabaseUrl, supabaseKey);