feat(seo): noindex hook, recipe self-canonical, list-page metadata

Add X-Robots-Tag noindex,nofollow handler in hooks.server.ts for /api,
/login, /logout, /register, /settings, /tasks, /fitness, /cospend,
/expenses, and the recipe admin/edit/add/search/favorites/to-try paths.
Header-based so the rule lives in one place and covers JSON responses.

Recipe detail pages now emit a self-canonical pointing at the bare slug —
the layout helper deliberately skipped detail pages, leaving query-param
variants (?multiplier=2, ?utm=…) as duplicate URLs in Google's index.

Per-page Seo on list pages so each ranks for its category-level query:
- Apologetik contra/pro indices now use localized heading + lede instead
  of hardcoded English descriptions
- Calendar month view title includes month + rite ("April 2026 ·
  Liturgical Calendar (Vetus Ordo) — Bocken")
- Recipe /category, /tag, /icon, /season hub + detail pages get
  descriptions via new *_meta_description and *_meta_prefix i18n keys
  (added in both DE and EN locales)

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "homepage",
-	"version": "1.63.0",
+	"version": "1.64.0",
 	"private": true,
 	"type": "module",
 	"scripts": {