feat: Journey addon — travel journal with entries, photos, public sharing & PDF export

- 5-table schema (journeys, entries, photos, trips, contributors) with migrations 87-91
- Trip-to-Journey sync engine with skeleton entries and photo sync
- Full CRUD API for journeys, entries, photos with Immich/Synology integration
- Timeline, Gallery and Map views with entry editor (markdown, mood, weather, pros/cons)
- Journey frontpage with hero card, stats and trip suggestions
- Public share links with token-based access and photo proxy
- PDF photo book export (Polarsteps-inspired)
- Dashboard redesign: mobile greeting, live trip hero, quick actions, unified card design
- BottomNav profile sheet with settings/admin/logout
- DayPlan mobile inline place picker
- TripFormModal members management
- Vacay calendar trip date indicator dots
- Fix contributor photo access (403) for journey Immich/Synology photos
- Trip deletion cleanup for journey skeleton entries
- i18n: 231 new keys across all 14 languages (native translations, no fallbacks)

client/src/components/Layout/MobileTopHeader.tsx

@@ -0,0 +1,17 @@
+interface Props {
+  title: string
+  subtitle?: string
+  actions?: React.ReactNode
+}
+
+export default function MobileTopHeader({ title, subtitle, actions }: Props) {
+  return (
+    <div className="px-5 pt-4 pb-3 flex justify-between items-center bg-zinc-50 dark:bg-zinc-950 flex-shrink-0 md:hidden">
+      <div className="flex-1 min-w-0">
+        <h1 className="text-[28px] font-extrabold text-zinc-900 dark:text-white tracking-tight leading-none">{title}</h1>
+        {subtitle && <div className="text-xs text-zinc-500 mt-1">{subtitle}</div>}
+      </div>
+      {actions && <div className="flex gap-2 items-center flex-shrink-0">{actions}</div>}
+    </div>
+  )
+}