Add configurable hover title verbosity for editor tabs

[murataslan1]

Fixes #163166.

Summary

• add a new setting workbench.editor.tabHoverMode with values default, short, medium, long
• map the configured tab hover mode to editor title verbosity when rendering editor tab hovers
• keep existing behavior by default (default maps to long/absolute path style)
• add a regression test for hover mode to verbosity mapping

Test Plan

• npx tsx ./node_modules/mocha/bin/mocha --ui tdd src/vs/workbench/test/common/editor.test.ts --timeout 10000

[vs-code-engineering]

📬 CODENOTIFY

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

@bpasero

Matched files:

• src/vs/workbench/browser/parts/editor/editor.ts
• src/vs/workbench/browser/parts/editor/editorTabsControl.ts
• src/vs/workbench/browser/workbench.contribution.ts
• src/vs/workbench/common/editor.ts

[Copilot]

Pull request overview

Adds a new workbench setting to control how verbose editor tab hover titles are, wiring it into the tab hover rendering via existing EditorInput.getTitle(Verbosity) behavior.

Changes:

• Introduces workbench.editor.tabHoverMode (default/short/medium/long) as a configurable setting.
• Maps tabHoverMode to Verbosity and uses it when computing editor tab hover titles.
• Adds a regression test to validate the mapping behavior.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/vs/workbench/test/common/editor.test.ts	Adds a unit test covering tab-hover-mode → Verbosity mapping.
src/vs/workbench/common/editor.ts	Introduces TabHoverMode and getEditorHoverVerbosity, and extends editor part config to include tabHoverMode.
src/vs/workbench/browser/workbench.contribution.ts	Registers the new workbench.editor.tabHoverMode setting and its descriptions.
src/vs/workbench/browser/parts/editor/editorTabsControl.ts	Applies the configured hover mode when generating tab hover titles.
src/vs/workbench/browser/parts/editor/editor.ts	Adds default + validation for tabHoverMode in editor part options.

[Copilot]

The new workbench.editor.tabHoverMode setting descriptions are a bit misleading relative to the implemented behavior: default is mapped to Verbosity.LONG (absolute path), but the enum description says "default format" without indicating it matches the existing absolute-path tooltip. Consider updating the default enum description (and/or the setting description) to explicitly state what is shown for default, and tweak the phrasing "shown from editor tabs when hovered" to the more standard "shown when hovering over editor tabs" for clarity.

Suggested change

	localize('workbench.editor.tabHoverMode.default', "Show the title in the default format."),
	localize('workbench.editor.tabHoverMode.short', "Show the file name."),
	localize('workbench.editor.tabHoverMode.medium', "Show the file path relative to the workspace folder."),
	localize('workbench.editor.tabHoverMode.long', "Show the absolute file path.")
	],
	'default': 'default',
	'description': localize('workbench.editor.tabHoverMode', "Controls the format of the title shown from editor tabs when hovered."),
	localize('workbench.editor.tabHoverMode.default', "Show the absolute file path (default)."),
	localize('workbench.editor.tabHoverMode.short', "Show the file name."),
	localize('workbench.editor.tabHoverMode.medium', "Show the file path relative to the workspace folder."),
	localize('workbench.editor.tabHoverMode.long', "Show the absolute file path.")
	],
	'default': 'default',
	'description': localize('workbench.editor.tabHoverMode', "Controls the format of the title shown when hovering over editor tabs."),