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/looks/look.json.example

@@ -0,0 +1,16 @@
+{
+    "look_id": "cool_dude",
+    "look_name": "Cool Dude",
+    "character_id": "johnny_shades",
+    "positive": "sunglasses, leather jacket, cool"
+    "negative": "nerd, geek"
+    "lora"{
+        "lora_name": "Illustrious/Looks/cool_dude.safetensors",
+        "lora_weight": 0.8,
+        "lora_triggers": "cool_dude"
+    },
+    "tags": [
+        "johnny_shades,
+        "cool"
+    ]
+}