pwa: fix offline caching for prayer/faith routes

The glob in sync.ts targeted a nonexistent /src/routes/glaube/ directory
instead of the actual [faithLang=faithLang] parameterized route. This meant
zero prayer pages were ever precached for offline use.

- Fix glob to match [faithLang=faithLang] and expand param segments to
  both language variants (glaube/faith, gebete/prayers, rosenkranz/rosary)
- Extract validPrayerSlugs to shared module for build-time route enumeration
- Add faith to service worker cacheable route regex

src/routes/[faithLang=faithLang]/[prayers=prayersLang]/[prayer]/+page.server.ts

@@ -1,32 +1,9 @@
 import type { PageServerLoad } from "./$types";
 import { error } from "@sveltejs/kit";
-
-// Valid prayer slugs (both languages)
-const validSlugs = new Set([
-	'das-heilige-kreuzzeichen', 'the-sign-of-the-cross',
-	'gloria-patri',
-	'paternoster', 'our-father',
-	'credo', 'nicene-creed',
-	'ave-maria', 'hail-mary',
-	'salve-regina',
-	'das-fatimagebet', 'fatima-prayer',
-	'gloria',
-	'gebet-zum-hl-erzengel-michael', 'prayer-to-st-michael-the-archangel',
-	'bruder-klaus-gebet', 'prayer-of-st-nicholas-of-flue',
-	'josephgebet-des-hl-papst-pius-x', 'prayer-to-st-joseph-by-pope-st-pius-x',
-	'das-confiteor', 'the-confiteor',
-	'postcommunio',
-	'anima-christi',
-	'prayer-before-a-crucifix', 'gebet-vor-einem-kruzifix',
-	'schutzengel-gebet', 'guardian-angel-prayer',
-	'apostolisches-glaubensbekenntnis', 'apostles-creed',
-	'tantum-ergo',
-	'angelus',
-	'regina-caeli',
-]);
+import { validPrayerSlugs } from '$lib/data/prayerSlugs';
 
 export const load: PageServerLoad = async ({ params, url }) => {
-	if (!validSlugs.has(params.prayer)) {
+	if (!validPrayerSlugs.has(params.prayer)) {
 		throw error(404, 'Prayer not found');
 	}