sessions: streamline editor title actions

[Sandeep Somavarapu (sandy081)]

Summary

• move Sessions diff, view-mode, code-review, attachment, and extension editor actions into the editor title area while keeping only Toggle Details in the group header
• expose the shared responsive diff preference as an Always Show Inline Diff overflow toggle for Session Changes and text diff editors, with collapse/expand actions alongside it
• align single- and multi-tab Add Tab placement, separator visibility and spacing, hover sizing, accessibility help, and focused menu/fixture coverage

The behavior remains scoped to the Agents Window; the normal workbench does not configure these Sessions menus.

Validation

• npm run compile
• npm run hygiene
• focused Changes, code review, editor title bridge, layout, Add Tab, and workbench tests
• stable single-tab component fixture with computed spacing and hover-size validation

[vs-code-engineering]

📬 CODENOTIFY

The following users are being notified based on files changed in this PR:

Benjamin Christopher Simmonds (@benibenj)

Matched files:

• src/vs/sessions/browser/parts/media/editorPart.css
• src/vs/sessions/browser/parts/singlePaneEditorPart.ts
• src/vs/workbench/browser/parts/editor/editorTabsControl.ts
• src/vs/workbench/browser/parts/editor/multiEditorTabsControl.ts
• src/vs/workbench/browser/parts/editor/singleEditorTabsControl.ts

[github-actions]

Screenshot Changes

Base: 1be3e735 Current: 40ed5471

Changed (20)

sessions/changes/agentsDiffEditor/CompactDiffWithFeedback/Dark

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sessions/changes/agentsDiffEditor/CompactDiffWithFeedback/Light

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sessions/changes/agentsDiffEditor/CompactDiffWithSubmitOverlay/Dark

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sessions/changes/agentsDiffEditor/CompactDiffWithSubmitOverlay/Light

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sessions/editorHeader/editorHeader/FullHeader/Dark

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sessions/editorHeader/editorHeader/FullHeader/Light

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sessions/editorHeader/editorHeader/BreadcrumbsAndAction/Dark

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sessions/editorHeader/editorHeader/BreadcrumbsAndAction/Light

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sessions/editorHeader/editorHeader/BreadcrumbsAndSecondaryAction/Dark

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sessions/editorHeader/editorHeader/BreadcrumbsAndSecondaryAction/Light

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sessions/editorHeader/editorHeader/BreadcrumbsOnly/Dark

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sessions/editorHeader/editorHeader/BreadcrumbsOnly/Light

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sessions/editorHeader/editorHeader/PrimaryActionOnly/Dark

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sessions/editorHeader/editorHeader/PrimaryActionOnly/Light

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sessions/editorHeader/editorHeader/SecondaryActionOnly/Dark

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sessions/editorHeader/editorHeader/SecondaryActionOnly/Light

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sessions/editorHeader/editorHeader/LayoutActionsOnly/Dark

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sessions/editorHeader/editorHeader/LayoutActionsOnly/Light

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sessions/editorHeader/editorHeader/SingleTabFullHeader/Dark

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sessions/editorHeader/editorHeader/SingleTabFullHeader/Light

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[Copilot]

Pull request overview

Moves Sessions-specific actions into editor title menus and aligns Add Tab presentation.

Changes:

• Relocates diff, review, attachment, view-mode, and extension actions.
• Adds the shared inline-diff toggle and accessibility guidance.
• Aligns Add Tab layout, separators, styling, fixtures, and tests.

Show a summary per file

File	Description
singleEditorTabsControl.ts	Repositions single-tab Add Tab control.
multiEditorTabsControl.ts	Simplifies editor toolbar creation.
editorTabsControl.ts	Consolidates separator handling.
workbench.test.ts	Updates header-menu expectations.
layoutActions.test.ts	Verifies attachment action placement.
editorTitleMenuBridge.test.ts	Updates extension-action bridge tests.
editorHeader.fixture.ts	Loads Sessions editor-part styling.
editor.contribution.ts	Moves attachment and extension actions.
codeReviewService.test.ts	Tests title-bar code-review contribution.
codeReview.contributions.ts	Moves Run Code Review to editor title.
changesViewActions.test.ts	Expands title-menu and accessibility tests.
sessionsChangesAccessibilityHelp.ts	Documents the inline-diff toggle.
changesViewActions.ts	Moves diff and view actions to editor title.
singlePaneEditorPart.ts	Removes the secondary header menu.
editorPart.css	Aligns title actions and Add Tab styling.
menus.ts	Removes the obsolete secondary-header menu.

Review details

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• Files reviewed: 16/16 changed files
• Comments generated: 2
• Review effort level: Balanced

[Mohammad javad Dianat (dianatofficial)]

Approved. The fix is minimal and correct.