feat: per-category email prefs, admin ops webhooks, per-user feature toggles (v0.61.0)

- Notification email preferences: every push category (follow, comment,
  reply, reaction, rating, mention, leftoverExpiring, shoppingList) now has
  an independent email toggle, plus a Weekly Digest toggle. Previously email
  sent unconditionally whenever the recipient had one; now gated the same
  way push already was. The weekly-digest cron route excludes opted-out
  users.

- Admin-only site-wide webhooks (Admin → Webhooks): new signups, support
  tickets, and reports filed can now fire an HMAC-signed HTTP webhook
  (Slack/Discord/ops alerting), independent of the existing per-user
  webhooks (which stay scoped to a user's own recipe/meal-plan/shopping-list
  events). Signing/delivery logic factored into lib/webhook-delivery.ts and
  shared by both dispatchers instead of duplicated.

- Settings → Features: users can hide Nutrition, Pantry, Meal Plan,
  Shopping Lists, Collections, or Messages from their own nav. Purely
  cosmetic — hidden pages stay reachable by direct link, nothing is
  access-restricted.

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

CHANGELOG.md

@@ -2,6 +2,13 @@
 
 All notable changes to Epicure are documented here. This file is mirrored in-app at `/changelog` (and in the admin dashboard) via `apps/web/lib/changelog.ts` — update both together.
 
+## 0.61.0 — 2026-07-20 23:15
+
+### Added
+- Settings → Notifications now has an email toggle for every category alongside the existing push toggle, plus a Weekly Digest toggle to opt out of the weekly email summary entirely.
+- Admin → Webhooks: site-wide ops webhooks (new signups, support tickets, reports filed) — separate from the existing per-user webhooks, for Slack/Discord-style ops alerting.
+- Settings → Features: hide Nutrition, Pantry, Meal Plan, Shopping Lists, Collections, or Messages from your own navigation. Cosmetic only — hidden pages stay reachable by direct link.
+
 ## 0.60.0 — 2026-07-20 22:15
 
 ### Security