Add audit log viewer to Settings page

dashboard/backend/routers/system.py

@@ -4,8 +4,8 @@ import psutil
 import platform
 import time
 import httpx
-from fastapi import APIRouter
-from config import TELEGRAM_BOT_TOKEN, TELEGRAM_CHAT_ID
+from fastapi import APIRouter, Query
+from config import TELEGRAM_BOT_TOKEN, TELEGRAM_CHAT_ID, VOLUME_ROOT
 
 router = APIRouter()
 
@@ -54,3 +54,17 @@ def system_stats():
         "uptime": f"{days}d {hours}h",
         "platform": platform.platform(),
     }
+
+
+@router.get("/audit-log")
+def audit_log(lines: int = Query(100, le=500)):
+    log_path = os.path.join(VOLUME_ROOT, "docker/nas-dashboard/audit.log")
+    if not os.path.exists(log_path):
+        return {"lines": []}
+    with open(log_path, "rb") as f:
+        f.seek(0, 2)
+        size = f.tell()
+        buf = min(size, lines * 200)
+        f.seek(max(0, size - buf))
+        data = f.read().decode(errors="replace").splitlines()
+    return {"lines": data[-lines:]}