chore(fork): support isolated worktrees and local app builds

[Quicksaver]

Summary

This fork needs repeatable local builds and isolated development work across its Windows and macOS worktrees. Keep the shared build and verification tools on base/fork so feature branches can use them without carrying copies.

What changed

• Coordinate worktree updates, PR publication, review, integration, and unattended builds through repository skills. Wait ten minutes after pushing before reviewing updated branches.
• Isolate desktop state, coordinate desktop and mobile verification capacity, and cache upstream baseline results by host and toolchain.
• Preserve single-origin development across loopback, LAN, and Tailscale connections, including host-aware proxy targets and larger development HTTP headers.
• Prepare worktree-owned Android devices and native clients with short CMake paths, ordered dependency preparation, React Native ABI alignment, and bounded build retries.
• Add local macOS certificate signing and desktop installer handoffs. Point mobile builds and updates at the fork's Expo project and Apple development team.

Validation

Four scoped typechecks passed; focused tests passed 216 checks with two unresolved failures.

• vp run --filter @t3tools/shared typecheck passed.
• vp exec tsc --noEmit -p scripts/tsconfig.json passed.
• vp run --filter @t3tools/web --filter @t3tools/mobile typecheck passed for both clients.
• Lint of changed TypeScript and JavaScript files passed with one no-control-regex warning in scripts/worktree-baseline.ts.
• Focused tests across dev proxying, dev runner and sharing, desktop artifact building and signing, native clients, Android preparation, baseline caching, and runtime coordination: 216 passed, 2 failed across 11 files.
• Both failures are in scripts/build-desktop-artifact.test.ts: Linux capture-helper staging expects bare cargo but resolves a Windows executable path, and the cross-architecture Windows payload test unexpectedly observes a native probe.
• The same-host upstream baseline for 95030dc674883f0f2a7fd034b32ce742c8cf55d0 has no results for those desktop-build tests, so their upstream status remains unverified.
• git diff --check passed. Integrated UI verification was excluded from this branch's assigned scope.

🤖 Generated by GPT-6 in Codex via T3 Code