Add NAS dashboard MVP: Docker mgmt, Gitea, Files, Terminal

dashboard/backend/routers/docker_router.py

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+import docker
+from fastapi import APIRouter
+from config import DOCKER_HOST
+
+router = APIRouter()
+client = docker.DockerClient(base_url=DOCKER_HOST)
+
+
+@router.get("/containers")
+def list_containers():
+    return [
+        {
+            "id": c.short_id,
+            "name": c.name,
+            "status": c.status,
+            "image": c.image.tags[0] if c.image.tags else str(c.image.id)[:20],
+            "ports": c.ports,
+        }
+        for c in client.containers.list(all=True)
+    ]
+
+
+@router.post("/containers/{container_id}/{action}")
+def container_action(container_id: str, action: str):
+    if action not in ("start", "stop", "restart"):
+        return {"error": "invalid action"}
+    c = client.containers.get(container_id)
+    getattr(c, action)()
+    return {"ok": True}
+
+
+@router.get("/containers/{container_id}/logs")
+def container_logs(container_id: str, tail: int = 200):
+    c = client.containers.get(container_id)
+    return {"logs": c.logs(tail=tail, timestamps=True).decode(errors="replace")}