Minecraft 26.2 Fabric server stack with CraftDeck management panel

- docker-compose: itzg/minecraft-server (Fabric, offline mode, whitelist
  enforced, Modrinth-managed mods), itzg/mc-backup sidecar, custom dashboard
- Gated auth for offline mode: approve username -> whitelisted with a short
  registration window -> EasyAuth /register + /login; auto-revoke on expiry
- CraftDeck panel (Next.js 16, zero native deps): live console (SSE), players
  & stats, lag diagnostics (server TPS vs player ping via spark), performance
  graphs, Modrinth mod search/manager, backups & restore, sandboxed file
  browser/editor, .env config editor with compose apply, cron schedules,
  Discord alerts, scrypt-hashed panel login
- scripts/setup.sh generates secrets; docs/ covers auth, mods, updating,
  backups, networking (Tailscale), troubleshooting

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

dashboard/src/app/api/metrics/route.ts

@@ -0,0 +1,32 @@
+import { NextRequest } from "next/server";
+import { db } from "@/server/db";
+import { ok, handle } from "@/server/api";
+
+export const dynamic = "force-dynamic";
+
+const RANGES: Record<string, { ms: number; bucketMs: number }> = {
+  "1h": { ms: 60 * 60 * 1000, bucketMs: 10 * 1000 },
+  "6h": { ms: 6 * 60 * 60 * 1000, bucketMs: 60 * 1000 },
+  "24h": { ms: 24 * 60 * 60 * 1000, bucketMs: 5 * 60 * 1000 },
+  "7d": { ms: 7 * 24 * 60 * 60 * 1000, bucketMs: 30 * 60 * 1000 },
+};
+
+export async function GET(req: NextRequest) {
+  return handle(async () => {
+    const range = RANGES[req.nextUrl.searchParams.get("range") ?? "1h"] ?? RANGES["1h"];
+    const since = Date.now() - range.ms;
+    // Bucket-average so long ranges stay light on the wire.
+    const rows = db()
+      .prepare(
+        `SELECT (ts / ?) * ? AS bucket,
+                AVG(cpu) AS cpu, AVG(mem_used) AS mem_used, MAX(mem_limit) AS mem_limit,
+                MAX(net_rx) AS net_rx, MAX(net_tx) AS net_tx,
+                AVG(tps) AS tps, AVG(mspt) AS mspt, MAX(players) AS players,
+                AVG(disk_used) AS disk_used, AVG(disk_free) AS disk_free
+         FROM metrics WHERE ts > ?
+         GROUP BY bucket ORDER BY bucket ASC`
+      )
+      .all(range.bucketMs, range.bucketMs, since);
+    return ok(rows);
+  });
+}