* perf(app): retain inactive workspace screens
App-wide routes cleared the active workspace selection, which removed the retained workspace deck from the React tree and made returning rebuild every panel. Keep mounted deck entries inactive across those routes and suspend inactive panel subscriptions so state is preserved without background work.
* perf(app): suspend remaining inactive queries
Retained composers and commit diff panels still subscribed through query hooks that did not receive panel activity. Propagate the existing activity gate so app-wide routes leave those hidden surfaces dormant.
* refactor(app): separate panel activity from connectivity
A hidden retained panel is still connected to its host. Keep connectivity truthful, pause work inside query and stream owners, and preserve terminal emulator identity while its stream is detached.
* test(app): target active retained controls
* fix(app): retain compact and terminal route content
* fix(app): hide inactive workspace overlays
* fix(app): stabilize desktop sidebar controls
Keep the left-window-controls toggle mounted across sidebar state changes so its position and tooltip state remain stable. Preserve browser placement and show an explicit Explorer close control only where native right-side controls do not provide one.
* fix(app): suppress inactive sidebar chrome
* fix(app): preserve desktop layout in half-screen windows
Treat native window controls as physical corner obstructions instead of deriving clearance from compact layout state. Keep 751px windows in desktop mode while preserving usable content when persisted sidebars are wide.
* fix(app): retain sidebar width across window resizes
* fix(app): yield app sidebar to narrow settings
* test(app): wait for mobile sidebar motion to settle
* fix(app): yield navigation to narrow workspace explorer
* fix(app): mark sidebar sizing helpers as worklets
* fix(app): hide app navigation when space is constrained
