* feat(app): replace empty panes with New tabs
Give every retained pane an independently identified New tab, replace it in place when a destination is chosen, and preserve split close and move invariants. Keep existing workspace startup and compact explorer routing explicit, with focused unit and browser regression coverage.
* test(app): count content tabs in subagent integration
* fix(app): preserve workspace shortcut ownership
* fix(app): keep file navigation in place
Retargeting a File tab allocated a new tab identity, causing the tab track to unmount and remount during navigation. Preserve the identity for File-to-File changes while retaining new instances for cross-kind replacements.
* feat(app): expand workspace panel actions
Keep the Command Center aligned with workspace tab and pane primitives. Add explicit panel placement, focused open behavior, keyboard navigation for empty panes, and a Changes pill that toggles the visible Side panel without closing its tab.
* feat(app): refine workspace pane actions
Prioritize Changes when available, keep Files useful before a selection, and reserve desktop diff clicks for selection so comments require the explicit affordance. Move the Changes shortcut to Shift+G to avoid consuming a likely copy variant.
* feat(app): improve access to workspace changes
Mohamed Boudra