修复模板索引值传递问题

pixelle_video/services/frame_html.py

@@ -200,9 +200,8 @@ class HTMLFrameGenerator:
                 }
             }
         """
-        # Preset parameters that should be ignored
-        PRESET_PARAMS = {'title', 'text', 'image', 'content_title', 'content_author', 
-                        'content_subtitle', 'content_genre'}
+        # Preset parameters that should be ignored (auto-injected by system)
+        PRESET_PARAMS = {'title', 'text', 'image', 'index'}
         
         # Pattern: {{param_name:type=default}} or {{param_name=default}} or {{param_name:type}} or {{param_name}}
         # Param name: must start with letter or underscore, can contain letters, digits, underscores

pixelle_video/services/frame_processor.py

@@ -293,15 +293,9 @@ class FrameProcessor:
         content_metadata = storyboard.content_metadata if storyboard else None
         
         # Build ext data
-        ext = {}
-        if content_metadata:
-            ext["content_title"] = content_metadata.title or ""
-            ext["content_author"] = content_metadata.author or ""
-            ext["content_subtitle"] = content_metadata.subtitle or ""
-            ext["content_genre"] = content_metadata.genre or ""
-        
-        # Add frame index (1-based)
-        ext["index"] = frame.index + 1
+        ext = {
+            "index": frame.index + 1,
+        }
         
         # Add custom template parameters
         if config.template_params: