Finalize iPad support

[erik-sutton95]

Finalize iPad as a first-class operator surface. The binary already ships universal (TARGETED_DEVICE_FAMILY 1,2) and full-screen. The live chrome is still the phone layout stretched.

Related: Icon pass · macOS · roadmap index

What already exists

• iPad orientations including upside-down
• UIRequiresFullScreen: YES — live monitor is a single scene, no Split View (intentional)
• Pairing two-column at width ≥ 640
• Settings: portrait tab strip vs landscape rail
• Battery glyph switches ipad vs iphone
• README already claims “Native iPhone and iPad layouts”

There are zero horizontalSizeClass branches in the live monitor.

Workstreams

• iPad landscape: larger scopes, stick, capture bar — consume extra pixels instead of letterboxing chrome
• Pointer / trackpad: hover + drag on gimbal stick, tap-to-focus, assist chips
• Hardware keyboard: rec, ISO/EV nudges, DISP — only if it does not fight on-set pocket use
• Pairing and Operator Setup already two-pane; live view should feel like the same family
• TestFlight on a real iPad with Pocket 4 Pro (BLE + Hotspot Configuration). Simulator is not done.

Out of scope

• Stage Manager / Split View (conflicts with full-screen live)
• iPad-as-second-screen watcher (multicast / share-feed thread)
• Redesigning for iPhone to match iPad

Done when

A Pocket session on iPad landscape uses the extra canvas, pointer can fly the gimbal, and we are willing to keep the README “native iPad layouts” line.

[erik-sutton95]

Tracked as maintainer task #98.