Cleanup: remove temporary commit message file from tracking

.gemini-commit-msg.txt

@@ -1,4 +0,0 @@
-Refine Active Engines UI component
-
-- Adds explicit labels (Text Refinement, Image Synthesis) to the active engines dropdowns for clarity.
-- Restores dynamic availability checking: Local options (Ollama, ComfyUI) are automatically disabled with an '(Offline)' tag if the FastAPI backend detects they are unreachable.