diff --git a/config.example.yaml b/config.example.yaml
index bcefa61..b585b5f 100644
--- a/config.example.yaml
+++ b/config.example.yaml
@@ -46,43 +46,16 @@ llm:
   model: ""  # Model name
 
 # ==================== TTS Configuration ====================
-tts:
-  default: edge
-  
-  # Edge TTS - Free, good quality
-  edge:
-    # No configuration needed
-  
-  # Azure TTS - Premium quality (optional)
-  # azure:
-  #   api_key: your_azure_key
-  #   region: eastus
-  #   voice: zh-CN-XiaoxiaoNeural
+# TTS uses Edge TTS by default (free, no configuration needed)
+# Optional: Override default voice in code using voice parameter
 
 # ==================== Image Generation Configuration ====================
+# Image generation uses ComfyUI workflows
+# Workflows are auto-discovered from workflows/image_*.json files
 image:
-  default: comfykit
-  
-  # ComfyKit - Local or cloud ComfyUI
-  comfykit:
-    comfyui_url: http://127.0.0.1:8188  # Local ComfyUI server
-    # runninghub_api_key: ""             # Optional: RunningHub cloud API key
-
-# ==================== External MCP Servers (Optional) ====================
-mcp_servers: []
-  # Example: Add custom MCP server
-  # - name: custom_llm_server
-  #   url: http://localhost:8080/mcp
-  #   protocol: sse
-  #   enabled: true
-  #   description: My custom LLM server
-  
-  # Example: Add Pixelle MCP server
-  # - name: pixelle
-  #   url: http://localhost:8888/mcp
-  #   protocol: sse
-  #   enabled: false
-  #   description: Pixelle image generation
+  default: default  # Default preset name (uses workflows/image_default.json)
+  comfyui_url: http://127.0.0.1:8188  # Local ComfyUI server
+  # runninghub_api_key: ""             # Optional: RunningHub cloud API key
 
 # ==================== Notes ====================
 # 1. LLM Configuration:
@@ -92,12 +65,21 @@ mcp_servers: []
 #    - Switch LLM: just copy-paste different values from comments
 #    - WebUI provides quick preset selection
 #
-# 2. Ollama (Recommended for Privacy):
+# 2. TTS Configuration:
+#    - No configuration needed, uses Edge TTS by default (free)
+#    - Override voice in code: await reelforge.tts(text="...", voice="zh-CN-XiaoxiaoNeural")
+#
+# 3. Image Generation:
+#    - Add workflow files: workflows/image_*.json
+#    - Auto-discovered presets: workflows/image_flux.json -> preset="flux"
+#    - Default preset: workflows/image_default.json
+#
+# 4. Ollama (Recommended for Privacy):
 #    - FREE: No API costs
 #    - PRIVATE: Data never leaves your machine
 #    - Install: https://ollama.com/download
 #    - Usage: ollama pull llama3.2
 #
-# 3. Security:
+# 5. Security:
 #    - Never commit config.yaml to version control
 #    - All sensitive data (API keys) should stay local
diff --git a/web.py b/web.py
index f6a4b72..7cdaadf 100644
--- a/web.py
+++ b/web.py
@@ -262,14 +262,14 @@ def render_advanced_settings(config_manager: ConfigManager):
             with st.container(border=True):
                 st.markdown(f"**{tr('settings.image.title')}**")
                 
-                # Get current configuration
-                comfykit_config = config_manager.config.get("image", {}).get("comfykit", {})
+                # Get current configuration (flat structure)
+                image_config = config_manager.config.get("image", {})
                 
                 # Local/Self-hosted ComfyUI configuration
                 st.markdown(f"**{tr('settings.image.local_title')}**")
                 comfyui_url = st.text_input(
                     tr("settings.image.comfyui_url"),
-                    value=comfykit_config.get("comfyui_url", "http://127.0.0.1:8188"),
+                    value=image_config.get("comfyui_url", "http://127.0.0.1:8188"),
                     help=tr("settings.image.comfyui_url_help"),
                     key="comfyui_url_input"
                 )
@@ -292,7 +292,7 @@ def render_advanced_settings(config_manager: ConfigManager):
                 st.markdown(f"**{tr('settings.image.cloud_title')}**")
                 runninghub_api_key = st.text_input(
                     tr("settings.image.runninghub_api_key"),
-                    value=comfykit_config.get("runninghub_api_key", ""),
+                    value=image_config.get("runninghub_api_key", ""),
                     type="password",
                     help=tr("settings.image.runninghub_api_key_help"),
                     key="runninghub_api_key_input"
@@ -311,15 +311,12 @@ def render_advanced_settings(config_manager: ConfigManager):
                     if llm_api_key and llm_base_url and llm_model:
                         config_manager.set_llm_config(llm_api_key, llm_base_url, llm_model)
                     
-                    # Save Image configuration (both local and cloud can be configured)
-                    config_manager.config["image"]["default"] = "comfykit"
-                    image_config = {}
+                    # Save Image configuration (flat structure)
+                    config_manager.config["image"]["default"] = "default"
                     if comfyui_url:
-                        image_config["comfyui_url"] = comfyui_url
+                        config_manager.config["image"]["comfyui_url"] = comfyui_url
                     if runninghub_api_key:
-                        image_config["runninghub_api_key"] = runninghub_api_key
-                    if image_config:
-                        config_manager.config["image"]["comfykit"] = image_config
+                        config_manager.config["image"]["runninghub_api_key"] = runninghub_api_key
                     
                     # Save to file
                     config_manager.save()