fix: auto-fix code issues (cron)

- 修复PEP8格式问题 (black格式化)
- 修复ai_manager.py中的行长度问题

backend/ai_manager.py

@@ -548,9 +548,7 @@ class AIManager:
         }
 
         content = [{"type": "text", "text": prompt}]
-        content.extend(
-            [{"type": "image_url", "image_url": {"url": url}} for url in image_urls]
-        )
+        content.extend([{"type": "image_url", "image_url": {"url": url}} for url in image_urls])
 
         payload = {
             "model": "gpt-4-vision-preview",
@@ -582,9 +580,7 @@ class AIManager:
             "anthropic-version": "2023-06-01",
         }
 
-        content = [
-            {"type": "image", "source": {"type": "url", "url": url}} for url in image_urls
-        ]
+        content = [{"type": "image", "source": {"type": "url", "url": url}} for url in image_urls]
         content.append({"type": "text", "text": prompt})
 
         payload = {