Rework iOS / iPadOS / tvOS app to match Android TV cinematic UI + behaviour

[jonathaneoliver]

Follow-up to #251. The Android TV app was rebuilt around a cinematic TV-native UI with new design tokens, a slide-from-right settings drawer, a server-picker grid, fullscreen-first playback, and a focused recovery model (Retry / Reload). Behavioural decisions are documented in android/InfiniteStreamPlayer/BEHAVIOR.md.

This issue covers porting that rework across the Apple targets — iPhone, iPad, and Apple TV. The existing project already shares one /InfiniteStreamPlayer/ source folder between the iOS and tvOS targets, so the rewrite lands across all three at once with platform branches where layout has to differ.

Scope

• Design tokens — Fraunces / Inter Tight / JetBrains Mono via SwiftUI fonts, warm gold accent, coral LIVE badge, focus-ring + scale rules where the platform supports them.
• Server picker — cinematic grid replacing the current button row + AddServerSheet. Pairing + mDNS discovery + manual entry preserved.
• Home — Continue Watching hero + frequency-ordered live preview tiles + bottom nav removed. iPhone/iPad get adapted layouts; tvOS matches Android TV's spec closely.
• Playback — fullscreen first; HUD reveal on tap (iOS) / D-pad-Down (tvOS). Same metadata pills, transport, scrubber.
• Settings drawer — slide-from-right (46% on tvOS/iPad, full-width sheet on iPhone). Picker-list-pop-then-close Back semantics. Six Advanced toggles parity with Android.
• Recovery — Retry (re-prepare same URL on same AVPlayer) + Reload (replace AVPlayer instance and re-issue original proxy URL). No Restart. Auto-recovery: codec retry up to 3× with backoff, non-codec single retry when flag enabled.
• Persistence — UserDefaults parity with Android's SharedPreferences: server list, flags, lastPlayed, viewCounts (per clip_id), /api/content cache (stale-while-revalidate).
• State layer — single PlayerViewModel analogue holding all state, persisted bits hydrated on init.

Out of scope (this issue)

• Porting Android's tile decoder-lease accounting verbatim. Apple chips have a much larger decode budget; tile previews still use AVPlayer-per-tile but no formal lease counting. NO_MEMORY safety net is not needed.
• Live-offset override (iOS: player_metrics_frames_displayed missing from payload — AVAssetTrack.nominalFrameRate is 0 for HLS #147 / iOS frame-rate parity work) — tracked separately.