P1: Fix TestFlight deployment — add LendairApp executable target,
use xcodebuild archive/export instead of swift build for IPA
P2: Fix swift-format — use built-in 'swift format lint' (Swift 5.6+)
instead of external 'swift-format' binary
P3: Create missing index.html for Vite build entry point
P3: Update vercel-action from v30 to v25 (better maintained)
b8c14ef8a7