feat(social): replace Help tile with Loto (Newroz) → loto.pex.mom

In the Social section of both the desktop app grid and the mobile home, the Help
tile becomes a Loto tile with the Newroz flame logo (loto-icon.svg) that opens
loto.pex.mom in a new tab. Adds the mobile.app.loto i18n key in all 6 locales.
Help remains reachable from the landing page.

web/src/components/AppLayout.tsx

@@ -111,7 +111,7 @@ const APP_SECTIONS: AppSection[] = [
       { title: 'mobile.app.forum',     icon: '📰', route: '/forum' },
       { title: 'mobile.app.kurdMedia', icon: '📺', route: '/social/kurdmedia' },
       { title: 'mobile.app.events',    icon: '📅', route: '/forum',     href: 'https://kurdishtts.pezkiwi.app' },
-      { title: 'mobile.app.help',      icon: '❓', route: '/help' },
+      { title: 'mobile.app.loto',      icon: '🔥', imgIcon: '/loto-icon.svg', route: '/forum', href: 'https://loto.pex.mom' },
       { title: 'mobile.app.music',     icon: '🎵', route: '/forum',     comingSoon: true },
       { title: 'mobile.app.rewshenbir',icon: '📡', imgIcon: '/rewshenbir-icon.png', route: '/rewshenbir', href: 'https://rewshenbir.pezkuwi.app' },
       { title: 'mobile.app.referral',  icon: '👥', route: '/dashboard', requiresAuth: true },