Add danbooru-mcp auto-start, git sync, status API endpoints, navbar status indicators, and LLM format retry

- app.py: add subprocess import; add _ensure_mcp_repo() to clone/pull
  danbooru-mcp from https://git.liveaodh.com/aodhan/danbooru-mcp into
  tools/danbooru-mcp/ at startup; add ensure_mcp_server_running() which
  calls _ensure_mcp_repo() then starts the Docker container if not running;
  add GET /api/status/comfyui and GET /api/status/mcp health endpoints;
  fix call_llm() to retry up to 3 times on unexpected response format
  (KeyError/IndexError), logging the raw response and prompting the LLM
  to respond with valid JSON before each retry
- templates/layout.html: add ComfyUI and MCP status dot indicators to
  navbar; add polling JS that checks both endpoints on load and every 30s
- static/style.css: add .service-status, .status-dot, .status-ok,
  .status-error, .status-checking styles and status-pulse keyframe animation
- .gitignore: add tools/ to exclude the cloned danbooru-mcp repo

data/styles/granblue_fantasy___heles.json

@@ -8,6 +8,8 @@
   "lora": {
     "lora_name": "Illustrious/Styles/Granblue_Fantasy_-_Heles.safetensors",
     "lora_weight": 1.0,
-    "lora_triggers": "Granblue_Fantasy_-_Heles"
+    "lora_triggers": "Granblue_Fantasy_-_Heles",
+    "lora_weight_min": 1.0,
+    "lora_weight_max": 1.0
   }
-}
+}