chore: remove unused imports and fix function name conflicts (#5764)

- Remove unused imports in anthropic.py, tmdbv3api/__init__.py, tv.py, test files
- Rename conflicting function names in subscribe.py and webhook.py
- Clean up unused re-exports in tmdbv3api/__init__.py (15 unused exports)
- Apply consistent formatting across API endpoints

app/api/openai_utils.py

@@ -51,11 +51,15 @@ def extract_text_and_images(content: Any) -> Tuple[str, List[str]]:
                     data = source.get("data")
                     media_type = source.get("media_type") or "image/png"
                     if data and str(data).strip():
-                        image_urls.append(f"data:{media_type};base64,{str(data).strip()}")
+                        image_urls.append(
+                            f"data:{media_type};base64,{str(data).strip()}"
+                        )
     return "\n".join(text_parts).strip(), image_urls
 
 
-def build_prompt(messages: List[Any], use_server_session: bool) -> Tuple[str, List[str]]:
+def build_prompt(
+    messages: List[Any], use_server_session: bool
+) -> Tuple[str, List[str]]:
     system_texts: List[str] = []
     transcript: List[str] = []
     latest_user_text = ""
@@ -97,7 +101,9 @@ def build_prompt(messages: List[Any], use_server_session: bool) -> Tuple[str, Li
     else:
         prompt_parts.append("当前用户消息：\n请结合图片内容回复。")
 
-    return "\n\n".join(part for part in prompt_parts if part).strip(), latest_user_images
+    return "\n\n".join(
+        part for part in prompt_parts if part
+    ).strip(), latest_user_images
 
 
 def build_session_id(session_key: str, prefix: str) -> str:
@@ -153,18 +159,24 @@ def build_responses_input(
                 content = item.get("content")
                 messages.append({"role": role, "content": content})
             elif item.get("role") and "content" in item:
-                messages.append({"role": item.get("role"), "content": item.get("content")})
+                messages.append(
+                    {"role": item.get("role"), "content": item.get("content")}
+                )
         return messages
 
-    if isinstance(input_data, dict) and input_data.get("role") and "content" in input_data:
-        messages.append({"role": input_data.get("role"), "content": input_data.get("content")})
+    if (
+        isinstance(input_data, dict)
+        and input_data.get("role")
+        and "content" in input_data
+    ):
+        messages.append(
+            {"role": input_data.get("role"), "content": input_data.get("content")}
+        )
 
     return messages
 
 
-def build_anthropic_messages(
-    system: Any, messages: List[Any]
-) -> List[Dict[str, Any]]:
+def build_anthropic_messages(system: Any, messages: List[Any]) -> List[Dict[str, Any]]:
     normalized: List[Dict[str, Any]] = []
     system_text, _ = extract_text_and_images(system)
     if system_text: