feat(hobbs-organizer): v1.1.0 password-protected LAN-only admin for calendar links

- /admin: first-visit password setup (scrypt), signed 30-day session cookie,
  calendars add/remove/reorder/rename/color/hide, masked URLs, per-feed test,
  history (20) with restore; /photo-admin -> /admin#photos placeholder
- settings in local /data (settings.json + auth.json + history/), seeded once
  from the calendar secret; dashboard + health read from settings
- start.mjs drops privileges after reading secrets and runs a front proxy that
  stamps the real client IP; admin refuses non-LAN and proxied requests
- deploy: HOBBS_DATA_DIR=/var/lib/hobbs-organizer/data, image 1.1.0 (1.0.0 kept)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E9NnVEico3WvFxLyjy1iW3

tv app/Hobbs-Family-Organizer-Self-Hosted-v1.0.0/app/api/admin/history/route.ts

@@ -0,0 +1,22 @@
+import { json, readJsonBody, requireAdmin } from "../../../_lib/auth";
+import { listHistory, readHistorySnapshot, saveSettings } from "../../../_lib/store";
+
+export const dynamic = "force-dynamic";
+
+export async function GET(request: Request) {
+  const denied = await requireAdmin(request);
+  if (denied) return denied;
+  return json({ history: await listHistory() });
+}
+
+/** Reverts calendars to a snapshot. The current state is itself snapshotted first, so a revert can be undone. */
+export async function POST(request: Request) {
+  const denied = await requireAdmin(request, { mutating: true });
+  if (denied) return denied;
+  const body = await readJsonBody<{ id?: string }>(request);
+  const snapshot = body?.id ? await readHistorySnapshot(body.id) : null;
+  if (!snapshot) return json({ error: "That version no longer exists." }, 404);
+  const saved = await saveSettings(snapshot.calendars, `Reverted to version from ${snapshot.updatedAt}`);
+  console.log(`[admin] calendars reverted to ${body?.id}`);
+  return json({ ok: true, updatedAt: saved.updatedAt });
+}