fix: correctly extract host from completion_url by handling both v1 and non-v1 endpoints

Author: jlau-ice

docreader/parser/caption.py

@@ -238,7 +238,8 @@ def _call_ollama_api(self, image_base64: str) -> Optional[CaptionChatResp]:
         """Call Ollama API for image captioning using base64 encoded image data."""
 
         # Extract host URL by removing the chat completions endpoint
-        host = self.completion_url.replace("/v1/chat/completions", "")
+        # Handle both "/v1/chat/completions" and "/chat/completions" patterns
+        host = self.completion_url.replace("/v1/chat/completions", "").replace("/chat/completions", "")
 
         # Initialize Ollama client with host and timeout
         client = ollama.Client(