bc2ac764dd sessions: avoid force-opening managed tabs when opening a file in single-pane layout (#325865)
* sessions: do not force-open managed tabs when opening a file in single-pane layout

Rework the single-pane managed docked tabs (Changes + Files placeholder) so
they are only opened into an *empty* editor group on a view-open trigger,
removing the fragile dismissal bookkeeping and aux-bar-visibility inference.

- Add layout-service events `onDidRevealSidePane` (side pane goes fully
  hidden -> visible) and `onDidEndSessionLayoutRestore` (restore epoch settles)
  and drive the managed-tabs strategy off named triggers A-D.
- Open default tabs only when the group is empty, so closing a managed tab
  sticks and closing a file no longer re-forces the tabs open / leaves the
  side pane un-closable.
- Ensure Changes (opened active) on new-session submit; ensure all docked
  inputs on a details-only reveal.
- Scope pending reconcile intents to their session so a superseded reconcile
  cannot leak its intent onto a switched-to session.
- Gate responsive sessions-list auto-collapse on small windows (<= 1800px).
- Only collapse editors on a details-only hide (aux still visible), not when
  the whole side pane closes.
- Tests + docs (SINGLE_PANE_SCENARIOS.md, sessions SKILL.md) updated.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* sessions: address CCR review feedback on single-pane managed tabs

- Guard the Files-tab tidy on onWillOpenEditor: resolve the event group via
  mainPart.getGroup and skip re-activations (already-open editors) and
  non-main-part groups, so selecting/closing-to-reveal an existing file no
  longer removes a user-added Files tab.
- Open the submit Changes tab with preserveFocus so activating it for detail
  mapping never steals focus from the just-submitted chat.
- Remove the now-dead internallyClosingEditors bookkeeping from the coordinator
  and both docked-tab strategies (no readers after dismissal tracking was
  removed).
- Trim the SinglePaneManagedTabsStrategy class JSDoc to the ownership contract.
- Tests: model production onWillOpenEditor ordering (fire before insert) and add
  a re-activation case; add onDidRevealSidePane transition assertions.
- Docs: fix stale/nonexistent API references in the sessions SKILL.md pitfalls.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-07-15 06:35:32 +00:00
2026-07-12 20:30:31 +00:00
2026-07-12 20:30:31 +00:00
2026-07-14 12:34:04 +02:00

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