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/tifa_lockhart_nomura_tetsuya_style_is.json

@@ -0,0 +1,19 @@
+{
+  "look_id": "tifa_lockhart_nomura_tetsuya_style_is",
+  "look_name": "Tifa Lockhart Nomura Tetsuya Style Is",
+  "character_id": "tifa_lockhart",
+  "positive": "1girl, solo, tifa_lockhart, nomura_tetsuya, official_art, official_style, long_hair, black_hair, red_eyes, large_breasts, white_tank_top, black_skirt, miniskirt, suspenders, black_gloves, fingerless_gloves, elbow_pads, red_boots, dolphin_shorts",
+  "negative": "lowres, bad_anatomy, bad_hands, text, error, missing_fingers, extra_digit, fewer_digits, cropped, worst_quality, low_quality, normal_quality, jpeg_artifacts, signature, watermark, username, blurry, short_hair, blonde_hair",
+  "lora": {
+    "lora_name": "Illustrious/Looks/Tifa_Lockhart_Nomura_Tetsuya-style_IS.safetensors",
+    "lora_weight": 1.0,
+    "lora_triggers": "Tifa_Lockhart(NTstyle), tifa_lockhart",
+    "lora_weight_min": 1.0,
+    "lora_weight_max": 1.0
+  },
+  "tags": [
+    "final_fantasy_vii",
+    "game_cg",
+    "concept_art"
+  ]
+}