Highlight changing expressions in Live Watch

[omarArm]

Fixes

• #850

Changes

• Now changing expressions will get highlighted in the Live Watch

Screenshots

Checklist

• 🤖 This change is covered by unit tests (if applicable).
• 🤹 Manual testing has been performed (if necessary).
• 🛡️ Security impacts have been considered (if relevant).
• [] 📖 Documentation updates are complete (if required).
• 🧠 Third-party dependencies and TPIP updated (if required).

[omarArm]

@JonatanAntoni @thorstendb-ARM I acknowledge that there might be some opinions on which parts of the expression should get highlighted. We can discuss it together in a meeting, but these are just some details that can easily be changed

[qltysh]

Coverage Impact

This PR will not change total coverage.

Modified Files with Diff Coverage (1)

Rating	File	% Diff	Uncovered Line #s
	src/views/live-watch/live-watch.ts	100.0%
	Total	100.0%

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[Copilot]

Pull request overview

Adds change-highlighting behavior to the Live Watch tree so users can more easily spot updated values during debugging (fixes #850).

Changes:

• Introduces a highlightedLabel on Live Watch values and uses it to render highlighted tree item labels.
• Splits evaluation into initial evaluation vs per-node refresh evaluation to detect value changes.
• Updates and extends Jest tests to cover highlight vs non-highlight behavior on refresh.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 5 comments.

File	Description
src/views/live-watch/live-watch.ts	Adds highlightedLabel support and refresh-time change detection to apply label highlighting.
src/views/live-watch/live-watch.test.ts	Updates mocks for renamed evaluation methods and adds tests for highlight behavior.