fix: render viewer snapshots for rotated iOS outlines

[thickfive]

Summary

• Allow the Viewer API to parse rotated iOS outline headers such as App: SampleApp 874x402 (landscape-right).
• Keeps screen populated so the viewer canvas renders instead of showing No snapshot yet.
• Leaves the original outline text unchanged, so the orientation suffix remains visible in the Viewer outline.

Changes

• Updated Sources/SimUse/Viewer/ViewerAPIHandlers.swift
  • Adjusted parseAppLine to accept an optional orientation suffix after the WxH screen size.
  • Kept the parsed appLabel limited to the app name instead of including the suffix.
• Updated Tests/ViewerAPIHandlersTests.swift
  • Added a regression test covering an outline header like App: SampleApp 874x402 (landscape-right).
  • Verified the snapshot response still includes screen.width, screen.height, and a plain screen.appLabel.
• Updated CHANGELOG.md
  • Added an Unreleased fix note for rotated iOS Simulator viewer snapshots.

Testing

• swift test --filter ViewerAPIHandlersTests
• make build
• Manual viewer check with a rotated iOS Simulator window