fix some issues

app.py

@@ -82,7 +82,12 @@ def wikipedia_search(query: str) -> str:
             "srlimit": 3, "srprop": "snippet",
         }
         resp = requests.get(search_url, params=params, timeout=10)
-        data = resp.json()
+        if not resp.content:
+            return "No Wikipedia results found."
+        try:
+            data = resp.json()
+        except Exception:
+            return "No Wikipedia results found."
         results = data.get("query", {}).get("search", [])
         if not results:
             return "No Wikipedia results found."
@@ -92,9 +97,12 @@ def wikipedia_search(query: str) -> str:
         resp2 = requests.get(
             f"https://en.wikipedia.org/api/rest_v1/page/summary/{encoded2}", timeout=10
         )
-        if resp2.status_code == 200:
-            d = resp2.json()
-            return f"{d.get('title', '')}: {d.get('extract', '')}"
+        if resp2.status_code == 200 and resp2.content:
+            try:
+                d = resp2.json()
+                return f"{d.get('title', '')}: {d.get('extract', '')}"
+            except Exception:
+                pass
         return "\n".join(r.get("snippet", "") for r in results)
     except Exception as e:
         return f"Wikipedia error: {e}"
@@ -232,7 +240,8 @@ Important rules:
 - Numbers: exact format as requested (integer, decimal, etc.).
 - Names: exact spelling as they appear in authoritative sources.
 - Lists: comma-separated values unless another format is specified.
-- Always use a tool to verify facts rather than relying on memory."""
+- Always use a tool to verify facts rather than relying on memory.
+- YouTube URLs cannot be visited directly; use web_search to find information about YouTube video content instead."""
 
     MODEL = "moonshotai/Kimi-K2.5:cheapest"
 
@@ -357,7 +366,7 @@ Important rules:
             {"role": "user", "content": user_content},
         ]
 
-        for iteration in range(15):
+        for iteration in range(20):
             t_llm = time.time()
             response = None
             for attempt in range(3):
@@ -595,7 +604,7 @@ if __name__ == "__main__":
 
     if space_host_startup:
         print(f"✅ SPACE_HOST found: {space_host_startup}")
-        print(f"   Runtime URL should be: https://{space_host_startup}.hf.space")
+        print(f"   Runtime URL should be: https://{space_host_startup}")
     else:
         print("ℹ️  SPACE_HOST environment variable not found (running locally?).")