feat: watchtower tracking, dev environment, security logs page

- watchtower: docker-compose with label filtering, email notifications
- watchtower labels on navidrome, openclaw, immich services
- dev env: docker-compose.dev.yml (port 4001), deploy-dev.yml CI workflow
- dev.nas.jimmygan.com Caddy site block with Authelia forward_auth
- security page: backend router parsing Authelia/Caddy container logs
- security page: frontend with stats cards, timeline, top IPs, event log
- wired security route into App.svelte and Sidebar

dashboard/frontend/src/components/Sidebar.svelte

@@ -6,6 +6,7 @@
     { id: "docker", label: "Docker", icon: "box" },
     { id: "files", label: "Files", icon: "folder" },
     { id: "terminal", label: "Terminal", icon: "terminal" },
+    { id: "security", label: "Security", icon: "shield" },
   ];
 
   const LAN_IP = "192.168.31.222";
@@ -91,6 +92,8 @@
             <svg class="w-[18px] h-[18px]" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="1.8"><path stroke-linecap="round" stroke-linejoin="round" d="M3 7v10a2 2 0 002 2h14a2 2 0 002-2V9a2 2 0 00-2-2h-6l-2-2H5a2 2 0 00-2 2z" /></svg>
           {:else if link.icon === "terminal"}
             <svg class="w-[18px] h-[18px]" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="1.8"><path stroke-linecap="round" stroke-linejoin="round" d="M8 9l3 3-3 3m5 0h3M5 20h14a2 2 0 002-2V6a2 2 0 00-2-2H5a2 2 0 00-2 2v12a2 2 0 002 2z" /></svg>
+          {:else if link.icon === "shield"}
+            <svg class="w-[18px] h-[18px]" fill="none" viewBox="0 0 24 24" stroke="currentColor" stroke-width="1.8"><path stroke-linecap="round" stroke-linejoin="round" d="M9 12l2 2 4-4m5.618-4.016A11.955 11.955 0 0112 2.944a11.955 11.955 0 01-8.618 3.04A12.02 12.02 0 003 9c0 5.591 3.824 10.29 9 11.622 5.176-1.332 9-6.03 9-11.622 0-1.042-.133-2.052-.382-3.016z" /></svg>
           {/if}
         </span>
         {link.label}