#3734 Fix Cmd-W for Task Manager and auxiliary windows

Summary:

• Register Task Manager and other standalone cmux windows as close-shortcut owners.
• Add a CI lint that requires cmux window identifiers to be listed in the auxiliary close-owner set.
• Add an identifier for the Feed Text Editor debug window so it participates in the same rule.

Testing:

• python3 scripts/lint_auxiliary_window_close_shortcuts.py
• ./tests/test_ci_auxiliary_window_close_shortcuts.sh
• CMUX_SKIP_ZIG_BUILD=1 ./scripts/reload.sh --tag tmcmdw

Notes:

• User dogfooding confirmed the Task Manager Cmd+W path is fixed.
• The first commit adds the lint guard; the second commit registers the windows so the guard passes.

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[!NOTE]
Low Risk
Low risk: changes are limited to window identifier registration and adds a CI lint/test guard, with minimal runtime impact outside Cmd+W behavior for auxiliary windows.

Overview
Ensures standalone auxiliary cmux windows reliably own the standard close shortcut (Cmd+W) by expanding the cmuxAuxiliaryWindowIdentifiers registry (including Task Manager and several debug/lab windows).

Adds a new Python lint (lint_auxiliary_window_close_shortcuts.py) plus CI coverage to fail PRs when a Swift window.identifier = NSUserInterfaceItemIdentifier("cmux.*") assignment isn’t registered (with an explicit ignore for cmux.bootstrap).

Assigns a concrete window.identifier to the Feed Text Editor debug window so it participates in the same shortcut-ownership rule.

^{Reviewed by Cursor Bugbot for commit d844e04f89c529df12ea2b8fe0f09147bc8638da. Bugbot is set up for automated code reviews on this repo. Configure here.}

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Summary by cubic

Fixes Cmd+W for Task Manager and other standalone cmux windows by registering them as close-shortcut owners. Adds a CI lint that enforces this rule, handles comments and multiline assignments, reports file:line, and ignores cmux.bootstrap.

• Bug Fixes

  • Registered Task Manager and other auxiliary windows in cmuxAuxiliaryWindowIdentifiers so Cmd+W closes them; set cmux.feedTextEditorDebug on the Feed Text Editor debug window.

• New Features

  • Added scripts/lint_auxiliary_window_close_shortcuts.py with file:line reporting; wired into CI via tests/test_ci_auxiliary_window_close_shortcuts.sh. Lint strips line and block comments, ignores commented-out owners, handles multiline window.identifier, and allows an explicit ignore for cmux.bootstrap.

Summary by CodeRabbit

• Tests

  • Added a CI test that validates auxiliary window close-shortcut handling.

• Chores

  • Added a linter to enforce which auxiliary windows may claim the standard close shortcut.
  • Added a CI validation step to run the new linter.

• Bug Fixes

  • Improved auxiliary/debug window identification and initialization so close-key behavior (Cmd+W) is handled more consistently.