fix(kb-deep-analyzer): Fix video analysis threshold

- Change threshold from LONG_VIDEO_THRESHOLD (30min) to SHORT_VIDEO_THRESHOLD (10min)
- Now videos 10+ minutes use chunked analysis for deeper insights

skills/kb-deep-analyzer/deep_analyzer.py

@@ -53,11 +53,11 @@ class SimpleAIClient:
     SHORT_VIDEO_THRESHOLD = 600   # 10分钟
     LONG_VIDEO_THRESHOLD = 1800   # 30分钟
 
-    def __init__(self, api_key: str = None, provider: str = "mock", model: str = "gpt-4"):
+    def __init__(self, api_key: str = None, provider: str = "mock", model: str = "gpt-4", base_url: str = ""):
         self.api_key = api_key or os.environ.get("AI_API_KEY", "")
         self.provider = provider
         self.model = model
-        self.base_url = os.environ.get("AI_BASE_URL", "")
+        self.base_url = base_url or os.environ.get("AI_BASE_URL", "")
 
     def generate(self, prompt: str, max_tokens: int = 1000) -> str:
         """生成文本"""
@@ -252,8 +252,8 @@ class DeepAnalyzer:
         """有字幕的长视频详细分析"""
         result = AnalysisResult()
 
-        if duration >= self.LONG_VIDEO_THRESHOLD and content_type == "video":
-            # 使用分段分析
+        if duration >= self.SHORT_VIDEO_THRESHOLD and content_type == "video":
+            # 10分钟以上使用分段分析
             result = self._analyze_in_chunks(title, subtitle, duration)
         else:
             # 直接分析