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/checkpoints/illustrious_mergesteinanimu_reborn.json

@@ -5,6 +5,7 @@
   "base_negative": "worst quality, bad quality, low quality, lowres, low resolution, anatomical nonsense, artistic error, bad anatomy, interlocked fingers, bad feet, censored, watermark, bad hands, extra digit, fewer digits, bar censor, mosaic censor, conjoined",
   "steps": 25,
   "cfg": 4.0,
-  "sampler_name": "euler_ancestral",
+  "scheduler": "normal",
+  "sampler_name":  "euler_ancestral",
   "vae": "integrated"
 }