chore(deps): bump SwiftTerm to 1.19.0

[batonogov]

Summary

• bump SwiftTerm from 1.18.0 (7691f85) to 1.19.0 (464df52)
• confirm the new revision is a strict descendant of the old pin (24 upstream commits, 0 behind)
• allow SwiftTerm's pinned SwiftTermBuildInfoPlugin in non-interactive xcodebuild runs with -skipPackagePluginValidation
• cover blocking CI, Xcode 27, nightly, release, screenshot, and release-smoke build paths
• document the flag and its pinned-dependency security boundary in AGENTS.md

Pine impact reviewed

SwiftTerm 1.19.0 adds alternate-scroll-mode handling on macOS, fixes OSC 8 hyperlink attribution, guards DECRQSS logging for non-ASCII payloads, and fixes terminal content layout after a font change.

SwiftTerm 1.19.0 also adds the SwiftTermBuildInfoPlugin build-tool plugin. Xcode requires interactive trust for that plugin by default, which caused the original CI run to fail at Validate plug-in before Pine compiled. Pine's SPM revisions remain pinned and reviewed; automation skips only the interactive validation step.

Upstream PR #642 is still open, and its requested Metal recovery change is not included in the v1.19.0 tag. Pine's own Metal display-recovery workaround remains unchanged.

Upstream references:

• https://github.com/migueldeicaza/SwiftTerm/releases/tag/v1.19.0
• Retry frames refused by the Metal renderer migueldeicaza/SwiftTerm#642

Validation

Environment:

• macOS 27.0 (26A5416b)
• Xcode 27.0 beta (27A5237l)
• macOS SDK 27.0 (26A5406c)

Passed:

• clean build-for-testing with SwiftTerm 1.19.0 and -skipPackagePluginValidation
• SwiftLint: 0 violations
• workflow YAML parsing
• shell syntax checks for the updated scripts
• scripts/tests/test-xcodebuild-cli-options.sh
• git diff --check

The first full PineTests run executed 779 tests but overloaded the Xcode 27 beta test host and produced unrelated timeout/process-lifecycle failures. Every affected suite passed in the serial rerun described in the original validation; required CI remains the clean baseline.

[github-actions]

✅ Code Coverage: 79.1719%

Threshold: 70%

Logic-only lines: 79031/99822

Coverage is at or above the required threshold.

Generated by CI — see job summary for detailed file-level breakdown.