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/scenes/bedroom_(pink).json

@@ -1,17 +1,28 @@
 {
-    "scene_id": "bedroom_(pink)",
-    "description": "A pink bedroom with a girly theme.",
-    "scene": {
-        "background": "wallpaper",
-        "foreground": "plush carpet",
-        "furniture": ["bed", "desk", "chair", "wardrobe", "window"],
-        "colors": ["pink", "white"],
-        "lighting": "soft",
-        "theme": "girly, cute"
-    },
-    "lora": {
-        "lora_name": "Illustrious/Backgrounds/Girl_b3dr00m-i.safetensors",
-        "lora_weight": 1.0,
-        "lora_triggers": "Girl_b3dr00m-i"
-    }
-}
+  "scene_id": "bedroom_(pink)",
+  "description": "A pink bedroom with a girly theme.",
+  "scene": {
+    "background": "wallpaper",
+    "foreground": "plush carpet",
+    "furniture": [
+      "bed",
+      "desk",
+      "chair",
+      "wardrobe",
+      "window"
+    ],
+    "colors": [
+      "pink",
+      "white"
+    ],
+    "lighting": "soft",
+    "theme": "girly, cute"
+  },
+  "lora": {
+    "lora_name": "Illustrious/Backgrounds/Girl_b3dr00m-i.safetensors",
+    "lora_weight": 1.0,
+    "lora_triggers": "Girl_b3dr00m-i",
+    "lora_weight_min": 1.0,
+    "lora_weight_max": 1.0
+  }
+}