feat: add disk telemetry and clean navigation

dashboard/plugin_api.py

@@ -10,6 +10,7 @@ import json
 import mimetypes
 import os
 import re
+import shutil
 import socket
 import sqlite3
 import subprocess
@@ -576,6 +577,24 @@ def _gpu_snapshot() -> dict[str, Any]:
     return {"detected": nvidia_present, "telemetry_available": False, "count": 0, "utilization_percent": None, "gpus": []}
 
 
+def _disk_snapshot() -> dict[str, Any]:
+    """Return usage for the filesystem visible to the dashboard process."""
+    path = "/"
+    try:
+        usage = shutil.disk_usage(path)
+    except OSError:
+        return {"path": path, "available": False, "total_bytes": 0, "used_bytes": 0, "free_bytes": 0, "used_percent": None}
+    return {
+        "path": path,
+        "available": True,
+        "total_bytes": usage.total,
+        "used_bytes": usage.used,
+        "free_bytes": usage.free,
+        "used_percent": round(usage.used * 100 / usage.total, 1) if usage.total else None,
+        "scope": "Filesystem visible to the dashboard process",
+    }
+
+
 def _runtime_snapshot() -> dict[str, Any]:
     mem = _read_meminfo()
     total = mem.get("MemTotal", 0)
@@ -633,6 +652,7 @@ def _runtime_snapshot() -> dict[str, Any]:
         "ollama_model_bytes": ollama_model_bytes,
         "ollama_model_vram_bytes": ollama_model_vram_bytes,
         "ollama_target_model_bytes": ollama_target_model_bytes,
+        "disk": _disk_snapshot(),
         "cpu": cpu,
         "gpu": gpu,
     }
@@ -1898,6 +1918,7 @@ def status() -> dict[str, Any]:
             ),
         },
         "connections": connection_rows,
+        "disk": _disk_snapshot(),
         "models": local,
         "popular": popular,
         "popular_filter": {