Restructure ORA editor into modular blueprints with browse dialog

- Split app.py into route blueprints (files, layers, images, polygon, mask, krita)
- Create services layer (polygon_storage, comfyui, file_browser)
- Extract config constants to config.py
- Split templates into Jinja partials (base, components, modals)
- Add browse dialog for visual file navigation
- Add /api/browse endpoint for directory listing

tools/ora_editor/config.py

@@ -0,0 +1,12 @@
+"""Configuration for ORA Editor application."""
+
+import os
+from pathlib import Path
+
+APP_DIR = Path(__file__).parent
+PROJECT_ROOT = Path("/home/noti/dev/ai-game-2")
+TEMP_DIR = APP_DIR / "temp"
+
+COMFYUI_BASE_URL = os.environ.get('COMFYUI_BASE_URL', '127.0.0.1:8188')
+
+TEMP_DIR.mkdir(exist_ok=True)