Fix image carousel showing UUID on hover in modal editor title

[arun-357]

Fixes #301984

Problem

Hovering the image carousel title in the modal header shows a raw UUID, and the UUID changes every time the carousel is reopened.

Root cause:

• Each carousel open generates a fresh collection id via generateUuid() (imageCarousel.contribution.ts), which ImageCarouselEditorInput turns into its resource URI: vscode-imagecarousel:///<uuid>.
• The modal header label (updateLabel() in modalEditorPart.ts) calls ResourceLabel.setResource() without a title option.
• With no title provided, ResourceLabelWidget.render() (labels.ts) falls back to labelService.getUriLabel(resource) for the tooltip — i.e. the UUID URI.

Fix

Pass title: activeEditor.getTitle(Verbosity.LONG) in the ResourceLabel options for the modal header, mirroring how editor tabs set their hover (multiEditorTabsControl.ts, editorTabsControl.ts#getHoverTitle).

This makes the modal header hover behave like existing non-file editor tabs — e.g. the Settings editor tab, whose hover shows "Settings" (its getTitle(Verbosity.LONG) falls back to getName()). The carousel hover now shows its stable title ("Image Carousel" / "Images Preview") instead of a per-open UUID.

The fix applies to all modal editor inputs (chat management, agent plugin, workspace trust, etc.), not just the image carousel. File editors opened modally (workbench.editor.useModal: "all") keep their useful full-path hover, since FileEditorInput.getTitle(Verbosity.LONG) returns the full path — no behavior change there.

Before / After

Before:

After:

Verification

• Right-click an image in the Explorer → Open in Images Preview → hover the modal title: shows the title, not a UUID; stable across reopens.
• Regression check with "workbench.editor.useModal": "all": a file opened in the modal still shows its full path on hover.
• compile-check-ts-native and ESLint pass.

[Copilot]

Pull request overview

Note

Copilot was unable to run its full agentic suite in this review.

Adds a (long) title string to the editor label model so consumers can display a richer title (e.g., tooltip/ARIA) for the active editor.

Changes:

• Populate a new title field using activeEditor.getTitle(Verbosity.LONG) in the label data for the active editor.

[dmitrivMS]

@arun-357 Thank you!