diff --git a/.gitignore b/.gitignore
index d5d3336..949d634 100644
--- a/.gitignore
+++ b/.gitignore
@@ -34,6 +34,7 @@ env/
 *~
 .cursorrules
 .cursorignore
+.kiro/
 
 # OS
 .DS_Store
diff --git a/pixelle_video/llm_presets.py b/pixelle_video/llm_presets.py
index b3e2f0d..685143a 100644
--- a/pixelle_video/llm_presets.py
+++ b/pixelle_video/llm_presets.py
@@ -49,6 +49,7 @@ LLM_PRESETS: List[Dict[str, Any]] = [
         "base_url": "http://localhost:11434/v1",
         "model": "llama3.2",
         "api_key_url": "https://ollama.com/download",
+        "default_api_key": "ollama",  # Required by OpenAI SDK but ignored by Ollama
     },
     {
         "name": "Moonshot",
diff --git a/pixelle_video/services/llm_service.py b/pixelle_video/services/llm_service.py
index 30cd31c..2af6e18 100644
--- a/pixelle_video/services/llm_service.py
+++ b/pixelle_video/services/llm_service.py
@@ -60,14 +60,15 @@ class LLMService:
         Initialize LLM service
         
         Args:
-            config: Full application config dict
+            config: Full application config dict (kept for backward compatibility)
         """
-        self.config = config.get("llm", {})
+        # Note: We no longer cache config here to support hot reload
+        # Config is read dynamically from config_manager in _get_config_value()
         self._client: Optional[AsyncOpenAI] = None
     
     def _get_config_value(self, key: str, default=None):
         """
-        Get config value from config file
+        Get config value dynamically from config_manager (supports hot reload)
         
         Args:
             key: Config key name
@@ -76,7 +77,8 @@ class LLMService:
         Returns:
             Config value
         """
-        return self.config.get(key, default)
+        from pixelle_video.config import config_manager
+        return getattr(config_manager.config.llm, key, default)
     
     def _create_client(
         self,
diff --git a/web/components/settings.py b/web/components/settings.py
index bd0b012..b4df0f7 100644
--- a/web/components/settings.py
+++ b/web/components/settings.py
@@ -80,8 +80,8 @@ def render_advanced_settings():
                         # Same preset as saved config: keep API key
                         default_api_key = current_llm["api_key"]
                     else:
-                        # Different preset: clear API key
-                        default_api_key = ""
+                        # Different preset: use default_api_key if provided (e.g., Ollama), otherwise clear
+                        default_api_key = preset_config.get("default_api_key", "")
                     
                     default_base_url = preset_config.get("base_url", "")
                     default_model = preset_config.get("model", "")