Remove external uses of current panel

[alexr00]

Part of #3058

[Copilot]

Pull request overview

Refactors PR/issue overview panel interactions to avoid relying on the singleton currentPanel, as groundwork for supporting multiple PR description editors (per #3058).

Changes:

• Update “scroll to pending review” behavior to target a specific PR by identity instead of using a global panel.
• Introduce getActivePanel() and switch chat context/tools/commands to use the active (focused) overview panel.
• Add instance method scrollToPendingReview() and adjust commands to call instance methods on the active panel.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
src/view/reviewCommentController.ts	Scroll-to-review now targets the active PR identity instead of the global panel.
src/view/pullRequestCommentController.ts	Scroll-to-review now passes PR identity (owner/repo/number).
src/lm/tools/openPullRequestTool.ts	Uses active PR overview panel rather than currentPanel.
src/lm/pullRequestContextProvider.ts	Pulls PR chat context from the active PR overview panel.
src/lm/issueContextProvider.ts	Pulls issue chat context from the active issue overview panel.
src/github/pullRequestOverview.ts	Adds identity-based panel lookup for scrolling; adds getActivePanel() and instance scroll method; updates refresh behavior.
src/github/issueOverview.ts	Adds getActivePanel() helper for focused issue/PR panel detection.
src/commands.ts	Updates refresh/focus commands to operate on the active PR overview panel instance.

[Copilot]

PullRequestOverviewPanel.refresh() now only refreshes when the PR webview is the active editor (_panel.active). This changes behavior vs the previous currentPanel check and can make pr.refreshPullRequest (triggered from the tree view while focus is not on the webview) a no-op even when a PR description panel is open. Consider refreshing the matching panel regardless of focus (e.g., refresh currentPanel, or add a refresh(owner, repo, number) that uses findPanel).

Suggested change

	const panel = this.getActivePanel();
	const panel = this.currentPanel ?? this.getActivePanel();