fix attributeError of persona, httpxTimeout tweeter (#1957)

```
File "/app/utils/social.py", line 118, in add_twitter_to_persona
AttributeError: 'NoneType' object has no attribute 'replace'
```

```
 File "/app/utils/social.py", line 72, in upsert_persona_from_twitter_profile
AttributeError: 'NoneType' object has no attribute 'replace'
```

 ```
File "/app/routers/apps.py", line 224, in get_or_create_user_persona
AttributeError: 'NoneType' object has no attribute 'replace'
```

```
File "/app/utils/social.py", line 67, in verify_latest_tweet
UnboundLocalError: cannot access local variable 'latest_tweet' where it
is not associated with a value
```

```
File "/app/utils/social.py", line 24, in get_twitter_profile
    response = await client.get(url, headers=headers)
httpx.ReadTimeout
```

backend/routers/apps.py

@@ -234,7 +234,7 @@ async def get_or_create_user_persona(uid: str = Depends(auth.get_current_user_ui
     persona_data = {
         'id': persona_id,
         'name': user.get('display_name', 'My Persona'),
-        'username': increment_username(user.get('display_name', 'MyPersona').replace(' ', '').lower()),
+        'username': increment_username((user.get('display_name') or 'MyPersona').replace(' ', '').lower()),
         'description': f"This is {user.get('display_name', 'my')} personal AI clone.",
         'image': '',  # Empty image as specified in the task
         'uid': uid,

backend/utils/social.py

@@ -11,6 +11,7 @@
 rapid_api_host = os.getenv('RAPID_API_HOST')
 rapid_api_key = os.getenv('RAPID_API_KEY')
 
+defaultTimeoutSec = 15
 
 async def get_twitter_profile(handle: str) -> Dict[str, Any]:
     url = f"https://{rapid_api_host}/screenname.php?screenname={handle}"
@@ -20,12 +21,10 @@ async def get_twitter_profile(handle: str) -> Dict[str, Any]:
         "X-RapidAPI-Host": rapid_api_host
     }
 
-    async with httpx.AsyncClient() as client:
-        response = await client.get(url, headers=headers)
-        response.raise_for_status()
-        data = response.json()
-        return data
-
+    response = httpx.get(url, headers=headers, timeout=defaultTimeoutSec)
+    response.raise_for_status()
+    data = response.json()
+    return data
 
 async def get_twitter_timeline(handle: str) -> Dict[str, Any]:
     print(f"Fetching Twitter timeline for {handle}...")
@@ -36,12 +35,10 @@ async def get_twitter_timeline(handle: str) -> Dict[str, Any]:
         "X-RapidAPI-Host": rapid_api_host
     }
 
-    async with httpx.AsyncClient() as client:
-        response = await client.get(url, headers=headers)
-        response.raise_for_status()
-        data = response.json()
-        return data
-
+    response = httpx.get(url, headers=headers, timeout=defaultTimeoutSec)
+    response.raise_for_status()
+    data = response.json()
+    return data
 
 async def verify_latest_tweet(username: str, handle: str) -> Dict[str, Any]:
     print(f"Fetching latest tweet for {handle}, username {username}...")
@@ -52,24 +49,24 @@ async def verify_latest_tweet(username: str, handle: str) -> Dict[str, Any]:
         "X-RapidAPI-Host": rapid_api_host
     }
 
-    async with httpx.AsyncClient() as client:
-        response = await client.get(url, headers=headers)
-        response.raise_for_status()
-        data = response.json()
-        # from the timeline, the first tweet is the latest
-        timeline = data.get('timeline', [])
-        if len(timeline) > 0:
-            latest_tweet = timeline[0]
-            # check if latest_tweet['text'] contains the word "verifying my clone"
-            if f'Verifying my clone({username})' in latest_tweet['text']:
-                return {"tweet": latest_tweet['text'], 'verified': True}
+    response = httpx.get(url, headers=headers, timeout=defaultTimeoutSec)
+    response.raise_for_status()
+    data = response.json()
+    # from the timeline, the first tweet is the latest
+    latest_tweet = None
+    timeline = data.get('timeline', [])
+    if len(timeline) > 0:
+        latest_tweet = timeline[0]
+        # check if latest_tweet['text'] contains the word "verifying my clone"
+        if f'Verifying my clone({username})' in latest_tweet['text']:
+            return {"tweet": latest_tweet['text'], 'verified': True}
 
-        return {"tweet": latest_tweet['text'], 'verified': False}
+    return {"tweet": latest_tweet['text'], 'verified': False}
 
 
 async def upsert_persona_from_twitter_profile(username: str, handle: str, uid: str) -> Dict[str, Any]:
     profile = await get_twitter_profile(handle)
-    profile['avatar'] = profile['avatar'].replace('_normal', '')
+    profile['avatar'] = (profile.get('avatar') or '').replace('_normal', '')
     persona = get_persona_by_username_twitter_handle_db(username, handle)
 
     if not persona:
@@ -115,7 +112,7 @@ async def upsert_persona_from_twitter_profile(username: str, handle: str, uid: s
 async def add_twitter_to_persona(handle: str, persona_id) -> Dict[str, Any]:
     persona = get_persona_by_id_db(persona_id)
     twitter = await get_twitter_profile(handle)
-    twitter['avatar'] = twitter['avatar'].replace('_normal', '')
+    twitter['avatar'] = (twitter.get('avatar') or '').replace('_normal', '')
     if 'twitter' not in persona['connected_accounts']:
         persona['connected_accounts'].append('twitter')
     persona['twitter'] = {