refactor: rename ManaDeck to Cards across entire monorepo

Rename the flashcard/deck management app from ManaDeck to Cards:
- Directory: apps/manadeck → apps/cards, packages/manadeck-database → packages/cards-database
- Packages: @manadeck/* → @cards/*, @manacore/manadeck-database → @manacore/cards-database
- Domain: manadeck.mana.how → cards.mana.how
- Storage: manadeck-storage → cards-storage
- Database: manadeck → cards
- All shared packages, infra configs, services, i18n, and docs updated
- 244 files changed, zero remaining manadeck references

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/presi/apps/web/src/lib/i18n/locales/de.json

@@ -3,7 +3,7 @@
 		"title": "Weitere Manacore Apps",
 		"memoro_desc": "KI-gestützte Sprachmemos",
 		"maerchenzauber_desc": "Magische Gute-Nacht-Geschichten",
-		"manadeck_desc": "KI Lernkarten",
+		"cards_desc": "KI Lernkarten",
 		"picture_desc": "KI Bildgenerierung",
 		"moodlit_desc": "Dein Stimmungsbegleiter",
 		"manacore_desc": "KI-Produktivitätssuite",

apps/presi/apps/web/src/lib/i18n/locales/en.json

@@ -3,7 +3,7 @@
 		"title": "More Manacore Apps",
 		"memoro_desc": "AI-powered voice memos",
 		"maerchenzauber_desc": "Magical bedtime stories",
-		"manadeck_desc": "AI flashcards",
+		"cards_desc": "AI flashcards",
 		"picture_desc": "AI image generation",
 		"moodlit_desc": "Your mood companion",
 		"manacore_desc": "AI productivity suite",

apps/presi/apps/web/src/lib/i18n/locales/es.json

@@ -3,7 +3,7 @@
 		"title": "Más Apps de Manacore",
 		"memoro_desc": "Notas de voz con IA",
 		"maerchenzauber_desc": "Cuentos mágicos para dormir",
-		"manadeck_desc": "Flashcards con IA",
+		"cards_desc": "Flashcards con IA",
 		"picture_desc": "Generación de imágenes con IA",
 		"moodlit_desc": "Tu compañero de ánimo",
 		"manacore_desc": "Suite de productividad IA",

apps/presi/apps/web/src/lib/i18n/locales/fr.json

@@ -3,7 +3,7 @@
 		"title": "Autres Apps Manacore",
 		"memoro_desc": "Mémos vocaux avec IA",
 		"maerchenzauber_desc": "Histoires magiques du soir",
-		"manadeck_desc": "Flashcards avec IA",
+		"cards_desc": "Flashcards avec IA",
 		"picture_desc": "Génération d'images avec IA",
 		"moodlit_desc": "Ton compagnon d'humeur",
 		"manacore_desc": "Suite de productivité IA",

apps/presi/apps/web/src/lib/i18n/locales/it.json

@@ -3,7 +3,7 @@
 		"title": "Altre App Manacore",
 		"memoro_desc": "Memo vocali con IA",
 		"maerchenzauber_desc": "Storie magiche della buonanotte",
-		"manadeck_desc": "Flashcard con IA",
+		"cards_desc": "Flashcard con IA",
 		"picture_desc": "Generazione immagini con IA",
 		"moodlit_desc": "Il tuo compagno d'umore",
 		"manacore_desc": "Suite di produttività IA",