Netzwerkanalyse-Zugang: network_access Toggle im User-Management

- network_access Spalte in UserResponse Model
- PUT /api/users/{id}/network-access Toggle-Endpoint
- Dashboard: Netzwerk-Spalte mit An/Aus-Button in User-Tabelle

src/routers/users.py

@@ -180,3 +180,20 @@ async def delete_user(
 
     await db.execute("DELETE FROM users WHERE id = ?", (user_id,))
     await db.commit()
+
+
+@router.put("/{user_id}/network-access")
+async def toggle_network_access(
+    user_id: int,
+    admin: dict = Depends(get_current_admin),
+    db: aiosqlite.Connection = Depends(db_dependency),
+):
+    cursor = await db.execute("SELECT id, network_access FROM users WHERE id = ?", (user_id,))
+    row = await cursor.fetchone()
+    if not row:
+        raise HTTPException(status_code=404, detail="Nutzer nicht gefunden")
+
+    new_val = 0 if row[1] else 1
+    await db.execute("UPDATE users SET network_access = ? WHERE id = ?", (new_val, user_id))
+    await db.commit()
+    return {"ok": True, "network_access": bool(new_val)}