Restore updater UI to the v0.64.25 baseline

Merged
AU
16d ago
+39-271

Closes #16341

Restore the macOS updater UI surfaces to the v0.64.25 baseline that preceded the recent updater/sidebar redesign. This removes the newer held-relaunch popover layout, badge appearance changes, and titlebar updater chrome changes that introduced the current Update Ready regressions and edge clipping.

The updater engine remains on current main; this PR is intentionally limited to the UI/source-control layer so channel switching, automatic-update policy, and relaunch plumbing continue to compile while the visible updater returns to the known-good baseline.

Validation

  • git diff --cached --check
  • python3 scripts/verify-local.py --only swift-syntax --swift-changed origin/main
  • Native macOS package/UI checks are delegated to hosted CI; no local Xcode build was run.

Changelog

none

Summary by cubic

Restores the macOS updater UI surfaces to the v0.64.25 baseline, removing the recent held-relaunch popover layout, badge appearance changes, and titlebar updater chrome that introduced the Update Ready regressions and edge clipping.

The updater engine stays on current main; only the UI layer is reverted, so channel switching, automatic-update policy, and relaunch plumbing continue to compile.

  • Removes the WaitingToRelaunchView layout and its agent/safety-chip rows.
  • Reverts titlebar controls and notification badge to plain SwiftUI symbols and accent colors, dropping the CmuxAppKitSupportUI dependency.
  • Restores the pre-redesign window-observation logic in TitlebarControlsAccessoryViewController.
  • Returns notification row removal and titlebar hover animations to the baseline behavior.