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/components/settings/settings-content.tsx

@@ -21,7 +21,7 @@ import {
 import { useQuery } from "@tanstack/react-query";
 import { AlertTriangle, Copy, Gift, Link2, Share2, Shield, Trash2, User } from "lucide-react";
 import { useEffect, useState } from "react";
-import { toast } from "sonner";
+import { toast } from "@/lib/toast";
 
 export function SettingsContent() {
   const { t } = useTranslation();