feat: unify UI components, AppSlider, and login screens across apps

SUMMARY:
Consolidate shared UI components into @manacore/shared-ui and add
AppSlider to all login screens for a consistent Mana ecosystem experience.

CHANGES:

1. UI Components Migration:
   - Added Card.svelte to @manacore/shared-ui with variants (elevated, outlined, ghost)
   - Migrated Manacore (7 files) and Manadeck (7 files) to use shared-ui
   - Removed local ui/ directories from both apps (8 components total)

2. AppSlider Unification:
   - Created shared AppSlider in @manacore/shared-ui with configurable props
   - Props: apps[], title, isDark, statusLabels, comingSoonLabel, openAppLabel, onAppClick
   - Supports both i18n and static text configurations
   - Updated Memoro AppSlider to use shared component with svelte-i18n
   - Updated Manacore AppSlider to use shared component
   - Created new AppSlider for ManaDeck and Märchenzauber

3. Login Page Enhancements:
   - Extended LoginPage in @manacore/shared-auth-ui with new snippets:
     - appSlider: Renders AppSlider at bottom (initial mode only)
     - headerControls: Renders controls (theme toggle, etc.) top-right
   - Updated all app login pages to include AppSlider:
     - ManaCore: indigo theme (#6366f1)
     - ManaDeck: violet theme (#8b5cf6)
     - Märchenzauber: pink theme (#FF6B9D)

4. Subscription Page Consolidation:
   - Created SubscriptionPage component in @manacore/shared-subscription-ui
   - Moved subscription data (plans, packages, costs) to shared package
   - Reduced subscription page code from ~100 to ~18 lines per app

FILES CHANGED:
- packages/shared-ui: Added Card, AppSlider, updated exports
- packages/shared-auth-ui: Extended LoginPage with snippets
- packages/shared-subscription-ui: Added SubscriptionPage, data files
- manacore/web: Migrated 7 files to shared-ui, updated login
- manadeck/web: Migrated 7 files to shared-ui, added AppSlider, updated login
- maerchenzauber/web: Added AppSlider, updated login
- memoro/web: Updated AppSlider to use shared component

DELETED (moved to shared packages):
- manacore/web/src/lib/components/ui/* (3 files)
- manadeck/web/src/lib/components/ui/* (5 files)
- memoro/web/src/lib/data/*.json (3 files)
- Various pnpm-lock.yaml and pnpm-workspace.yaml files

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

packages/shared-subscription-ui/src/data/subscriptionData.json

@@ -0,0 +1,167 @@
+{
+  "subscriptions": [
+    {
+      "id": "free",
+      "name": "Mana Stream Free",
+      "nameEn": "Mana Stream Free",
+      "nameIt": "Mana Stream Free",
+      "price": 0,
+      "priceUnit": "",
+      "monthlyMana": 150,
+      "canGiftMana": false,
+      "popular": false,
+      "billingCycle": "monthly",
+      "available": true
+    },
+    {
+      "id": "Mana_Stream_Small_v1",
+      "name": "Kleiner Mana Stream",
+      "nameEn": "Small Mana Stream",
+      "nameIt": "Piccolo Mana Stream",
+      "price": 5.99,
+      "priceUnit": "/ Monat",
+      "monthlyMana": 600,
+      "canGiftMana": true,
+      "popular": false,
+      "billingCycle": "monthly",
+      "available": true
+    },
+    {
+      "id": "Mana_Stream_Small_Yearly_v1",
+      "name": "Kleiner Mana Stream",
+      "nameEn": "Small Mana Stream",
+      "nameIt": "Piccolo Mana Stream",
+      "price": 47.99,
+      "priceUnit": "/ Jahr",
+      "priceBreakdown": "(entspricht 3,99€ / Monat, 33% Rabatt)",
+      "monthlyMana": 600,
+      "canGiftMana": true,
+      "popular": false,
+      "billingCycle": "yearly",
+      "monthlyEquivalent": 3.99,
+      "available": true
+    },
+    {
+      "id": "Mana_Stream_Medium_v1",
+      "name": "Mittlerer Mana Stream",
+      "nameEn": "Medium Mana Stream",
+      "nameIt": "Medio Mana Stream",
+      "price": 14.99,
+      "priceUnit": "/ Monat",
+      "monthlyMana": 1500,
+      "canGiftMana": true,
+      "popular": false,
+      "billingCycle": "monthly",
+      "available": true
+    },
+    {
+      "id": "Mana_Stream_Medium_Yearly_v1",
+      "name": "Mittlerer Mana Stream",
+      "nameEn": "Medium Mana Stream",
+      "nameIt": "Medio Mana Stream",
+      "price": 119.99,
+      "priceUnit": "/ Jahr",
+      "priceBreakdown": "(entspricht 9,99€ / Monat, 33% Rabatt)",
+      "monthlyMana": 1500,
+      "canGiftMana": true,
+      "popular": false,
+      "billingCycle": "yearly",
+      "monthlyEquivalent": 9.99,
+      "available": true
+    },
+    {
+      "id": "Mana_Stream_Large_v1",
+      "name": "Großer Mana Stream",
+      "nameEn": "Large Mana Stream",
+      "nameIt": "Grande Mana Stream",
+      "price": 29.99,
+      "priceUnit": "/ Monat",
+      "monthlyMana": 3000,
+      "canGiftMana": true,
+      "popular": false,
+      "billingCycle": "monthly",
+      "available": true
+    },
+    {
+      "id": "Mana_Stream_Large_Yearly_v1",
+      "name": "Großer Mana Stream",
+      "nameEn": "Large Mana Stream",
+      "nameIt": "Grande Mana Stream",
+      "price": 239.99,
+      "priceUnit": "/ Jahr",
+      "priceBreakdown": "(entspricht 19,99€ / Monat, 33% Rabatt)",
+      "monthlyMana": 3000,
+      "canGiftMana": true,
+      "popular": false,
+      "billingCycle": "yearly",
+      "monthlyEquivalent": 19.99,
+      "available": true
+    },
+    {
+      "id": "Mana_Stream_Giant_v1",
+      "name": "Riesiger Mana Stream",
+      "nameEn": "Giant Mana Stream",
+      "nameIt": "Gigante Mana Stream",
+      "price": 49.99,
+      "priceUnit": "/ Monat",
+      "monthlyMana": 5000,
+      "canGiftMana": true,
+      "popular": false,
+      "billingCycle": "monthly",
+      "available": true
+    },
+    {
+      "id": "Mana_Stream_Giant_Yearly_v1",
+      "name": "Riesiger Mana Stream",
+      "nameEn": "Giant Mana Stream",
+      "nameIt": "Gigante Mana Stream",
+      "price": 399.99,
+      "priceUnit": "/ Jahr",
+      "priceBreakdown": "(entspricht 33,33€ / Monat, 33% Rabatt)",
+      "monthlyMana": 5000,
+      "canGiftMana": true,
+      "popular": false,
+      "billingCycle": "yearly",
+      "monthlyEquivalent": 33.33,
+      "available": true
+    }
+  ],
+  "packages": [
+    {
+      "id": "Mana_Potion_Small_v1",
+      "name": "Kleiner Mana Trank",
+      "nameEn": "Small Mana Potion",
+      "nameIt": "Piccola Pozione di Mana",
+      "manaAmount": 350,
+      "price": 4.99,
+      "popular": false
+    },
+    {
+      "id": "Mana_Potion_Medium_v1",
+      "name": "Mittlerer Mana Trank",
+      "nameEn": "Medium Mana Potion",
+      "nameIt": "Media Pozione di Mana",
+      "manaAmount": 700,
+      "price": 9.99,
+      "popular": false
+    },
+    {
+      "id": "Mana_Potion_Large_v1",
+      "name": "Großer Mana Trank",
+      "nameEn": "Large Mana Potion",
+      "nameIt": "Grande Pozione di Mana",
+      "manaAmount": 1400,
+      "price": 19.99,
+      "popular": false
+    },
+    {
+      "id": "Mana_Potion_Giant_v2",
+      "name": "Riesiger Mana Trank",
+      "nameEn": "Giant Mana Potion",
+      "nameIt": "Pozione di Mana Gigante",
+      "manaAmount": 2800,
+      "price": 39.99,
+      "popular": false
+    }
+  ]
+}