feat: ios16 support

[Yash-Singh1]

What Changed

Adds ios 16 support to the GhosttyKit library used in mobile app

Why

So we support ios 16

Checklist

• This PR is small and focused
• I explained what changed and why

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Note

Medium Risk
Updates a vendored native terminal rendering framework and its C/Swift integration points, which could introduce runtime/ABI issues on iOS if the new Ghostty build diverges. Dependency/lockfile changes (adding shiki) also affect build output and dependency resolution.

Overview
Adds iOS 16 support for the mobile terminal by switching the vendored GhosttyKit.xcframework to a new fork/revision and updating the vendored ghostty.h API surface (notably adding GHOSTTY_API visibility macros and changing read_clipboard_cb to return bool).

Updates T3TerminalView.swift to match the new callback signature, refreshes Ghostty vendoring/license docs, and introduces scripts/build-libghostty-ios16.sh to rebuild and replace the iOS slices/headers of GhosttyKit.xcframework. Also pins [email protected] in apps/mobile/package.json with corresponding bun.lock updates.

^{Reviewed by Cursor Bugbot for commit 2e04b58. Bugbot is set up for automated code reviews on this repo. Configure here.}

Note

Add iOS 16 support to the mobile terminal using a custom Ghostty fork

• Updates vendored GhosttyKit.xcframework to a custom-I/O fork of Ghostty with an iOS 16 compatibility patch (revision d36c3b8).
• Adds build-libghostty-ios16.sh, a script to rebuild the xcframework from source using Zig 0.15.2, replacing only the ios-arm64 and ios-arm64-simulator slices.
• Updates T3TerminalView.swift to return false from the read_clipboard_cb closure to match the updated ghostty_runtime_read_clipboard_cb signature (changed from void to bool).
• Adds [email protected] as a dependency and updates the lockfile with scoped resolutions to avoid conflicts with packages expecting [email protected].

^{Macroscope summarized 2e04b58.}

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• Commit unit tests in branch yash/ios16-mobile

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[macroscopeapp]

Approvability

Verdict: Needs human review

This PR updates a vendored native iOS library (GhosttyKit) with iOS 16 compatibility patches. Vendored binary updates cannot be fully verified through code review alone, and this enables new platform support, warranting human review.

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