* Add workspace pages in the titlebar
* Add workspace pages UI test target entry
* Relax workspace pages UI test titlebar checks
* Use page close button in workspace pages UI test
* Stabilize workspace pages UI test interruptions
* Skip page close confirms in UI tests
* Clean up superseded workspace handoffs
* Tighten page hint UI assertions
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Co-authored-by: cmux <cmux@cmuxs-Mac-mini.local>
* Add sidebar help menu
* Fix help menu test wiring
* Fix help menu accessibility
* Use native popup for help menu
* Use icon button for sidebar help
* Add feedback composer and feedback API
* Allow preview builds without feedback env
* Tighten feedback upload limits
* Adjust sidebar footer padding
* Tighten sidebar footer spacing
* Add link affordances to help menu
* Polish sidebar feedback composer
* Move feedback icon to trailing edge
* Normalize help menu trailing icon sizes
* Enlarge help menu trailing icons
* Reduce help menu link icon size
* Shrink help menu link arrow
* Reduce help menu link arrow again
* Fix feedback message editor focus
* Add send feedback keyboard shortcut
* Polish feedback launch and delivery
* Add keyboard copy mode for terminal scrollback
* Show vim copy mode indicator in terminal
* Fix vi copy-mode symbol keys and pending yank handling
* Refine copy-mode badge wording and font
* Rename keyboard copy-mode badge to VI MODE
* Address PR feedback for copy-mode routing and keyup handling
* Refresh copy-mode viewport row after scrolling