feat: onboarding trial flow, Google sign-in, dark mode hotspot fixes

- Move trial creation from auth hook to dedicated /subscriptions/trial endpoint
  with eligibility checks (3-day Full Paket trial)
- Add animated onboarding progress (Remotion) with confetti on completion
- Register redirects to subscription page with welcome flow
- Add Google social login/signup support with config injection
- Improve hotspot overlay visibility in dark mode
- Show "Panele Git" on landing page when authenticated
- Turkish translations for API error messages
- Add toast utility wrapper, UUID generation for auth IDs

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/web/src/messages/en.json

@@ -118,11 +118,28 @@
     },
     "statusLabels": {
       "active": "Active",
+      "trial": "Trial",
       "pending": "Pending",
       "cancelled": "Cancelled",
       "expired": "Expired"
     },
-    "popular": "Popular"
+    "popular": "Popular",
+    "trialTitle": "3-Day Full Package Trial",
+    "trialDescription": "Free access to all brands for 3 days. No credit card required.",
+    "startTrial": "Start Free Trial",
+    "trialStarted": "Your 3-day Full Package trial has started!",
+    "onboarding": {
+      "provisioning": "Setting up your free trial",
+      "step1": "Verifying account",
+      "step2": "Preparing catalogs",
+      "step3": "Activating Full Package",
+      "step4": "Completed!",
+      "completed": "You can test all catalogs without limits!",
+      "trialDuration": "3-Day Trial",
+      "startSearching": "Start Searching",
+      "error": "An error occurred while starting your trial.",
+      "retry": "Try Again"
+    }
   },
   "payment": {
     "title": "Payment",

apps/web/src/messages/tr.json

@@ -118,11 +118,28 @@
     },
     "statusLabels": {
       "active": "Aktif",
+      "trial": "Deneme",
       "pending": "Bekliyor",
       "cancelled": "İptal Edildi",
       "expired": "Süresi Doldu"
     },
-    "popular": "Popüler"
+    "popular": "Popüler",
+    "trialTitle": "3 Gün Full Paket Denemesi",
+    "trialDescription": "Tüm markalara 3 gün boyunca ücretsiz erişim. Kredi kartı gerekmez.",
+    "startTrial": "Ücretsiz Denemeyi Başlat",
+    "trialStarted": "3 günlük Full Paket denemeniz başlatıldı!",
+    "onboarding": {
+      "provisioning": "Ücretsiz kullanım hakkınız tanımlanıyor",
+      "step1": "Hesap doğrulanıyor",
+      "step2": "Kataloglar hazırlanıyor",
+      "step3": "Full Paket aktif ediliyor",
+      "step4": "Tamamlandı!",
+      "completed": "Tüm katalogları sınırsız test edebilirsiniz!",
+      "trialDuration": "3 Gün Deneme",
+      "startSearching": "Şase Aramaya Başla",
+      "error": "Deneme başlatılırken bir hata oluştu.",
+      "retry": "Tekrar Dene"
+    }
   },
   "payment": {
     "title": "Ödeme",