test: add endgame test cases for 0.19.0

[xinyi-gong]

No description provided.

[Copilot]

Pull request overview

This PR expands the SWTBot endgame manual test plans for the 0.19.0 milestone by adding new regression/edge-case test cases and introducing a new plan covering inline-completion indentation behavior tied to Eclipse editor preferences.

Changes:

• Added new regression coverage for hover-card “Thinking effort” description readability.
• Extended subagent and CLS session persistence plans with additional cancellation/restore and layout regression scenarios.
• Added a new test plan for inline completion indentation preferences and expanded local file tool-link navigation coverage.

Reviewed changes

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

Show a summary per file

File	Description
com.microsoft.copilot.eclipse.swtbot.test/test-plans/thinking-effort/thinking-effort.md	Adds TC-003 to prevent regressions where hover-card text truncates due to width constraints.
com.microsoft.copilot.eclipse.swtbot.test/test-plans/subagent/subagent.md	Adds coverage for confirmation-dialog skip/cancel layout behavior and updates exercised entry points.
com.microsoft.copilot.eclipse.swtbot.test/test-plans/file-system/local-file-edit-and-create-tools.md	Adds TC-007/TC-008 for Project Explorer reveal behavior and file-URI fragment handling.
com.microsoft.copilot.eclipse.swtbot.test/test-plans/editor-indentation-preferences/editor-indentation-preferences.md	New plan validating inline completion indentation respects Eclipse editor preferences and doesn’t regress Java behavior.
com.microsoft.copilot.eclipse.swtbot.test/test-plans/cls-session-persistence/cls-session-persistence.md	Adds TC-008 validating cancelled terminal tool-call state persists after conversation restoration.

Comments suppressed due to low confidence (1)

com.microsoft.copilot.eclipse.swtbot.test/test-plans/subagent/subagent.md:22

• The plan now exercises a subagent tool-confirmation dialog (TC-007), but the "Not exercised" list still claims confirmation dialogs are not exercised, and the new entry point says "Cancel" even though the dialog button in TC-007 is "Skip". This is internally inconsistent and can mislead readers about what the plan covers.

- Cancel button on a subagent tool-confirmation dialog.
- `conversation/destroy` LSP call on session switch.

Not exercised:
- Subagent tool-call confirmation dialogs.