fix: auto-detect RunPod environment and use correct paths

- Automatically detects RunPod environment (checks for /workspace directory)
- Uses RunPod paths by default: /workspace/huggingface_cache and /workspace/ComfyUI/models
- Falls back to local paths (~/.cache/huggingface and ~/ComfyUI/models) on non-RunPod systems
- Updated help text to show both RunPod and local defaults
- Updated example YAML with RunPod paths

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

artifact_comfyui_download.sh

@@ -97,11 +97,16 @@ else
     CONFIG_FILE=""  # No config file by default
 fi
 
-# Default cache directory (use HuggingFace default)
-CACHE_DIR="${CACHE_DIR:-${HOME}/.cache/huggingface}"
-
-# Default ComfyUI models directory
-COMFYUI_DIR="${COMFYUI_DIR:-${HOME}/ComfyUI/models}"
+# Default cache directory - detect RunPod or use HuggingFace default
+if [[ -d "/workspace" ]]; then
+    # RunPod environment
+    CACHE_DIR="${CACHE_DIR:-/workspace/huggingface_cache}"
+    COMFYUI_DIR="${COMFYUI_DIR:-/workspace/ComfyUI/models}"
+else
+    # Local environment
+    CACHE_DIR="${CACHE_DIR:-${HOME}/.cache/huggingface}"
+    COMFYUI_DIR="${COMFYUI_DIR:-${HOME}/ComfyUI/models}"
+fi
 
 # Default command
 COMMAND="both"
@@ -727,8 +732,12 @@ while [[ $# -gt 0 ]]; do
             echo ""
             echo "Options:"
             echo "  -c, --config FILE     Configuration file (default: NONE)"
-            echo "  --cache-dir DIR       Cache directory (default: ~/.cache/huggingface)"
-            echo "  --comfyui-dir DIR     ComfyUI models directory (default: ~/ComfyUI/models)"
+            echo "  --cache-dir DIR       Cache directory (default: auto-detect)"
+            echo "                        RunPod: /workspace/huggingface_cache"
+            echo "                        Local: ~/.cache/huggingface"
+            echo "  --comfyui-dir DIR     ComfyUI models directory (default: auto-detect)"
+            echo "                        RunPod: /workspace/ComfyUI/models"
+            echo "                        Local: ~/ComfyUI/models"
             echo "  -h, --help            Show this help message"
             echo ""
             echo "Examples:"