Fix hintTimer disposal leak and restore tooltip live-update during active display

[Copilot]

Three issues in updateTitleBarEntry.ts introduced by the styling rework:

• Memory leak: hintTimer (a setTimeout handle) was never cleared on disposal. Added a toDisposable registration in the constructor to clear it.

• Unsafe non-null assertion: this.content! in the flashHintOnce async callback could be stale by the time the timer fires. Captured content as a local variable before scheduling.

• Tooltip staleness regression: onStateChange was refactored to combine early-return conditions, inadvertently dropping the this.tooltip.renderState(this.state) call for the tooltipVisible / no-focus path. This broke live updates (e.g., download progress) while the tooltip is open. Restored the original behavior.

// Before — tooltip silently stale when visible:
if (this.mode === 'none' || this.tooltipVisible || !await this.hostService.hadLastFocus()) {
    return;
}

// After — tooltip kept current even while shown:
if (this.mode === 'none') { return; }
if (this.tooltipVisible || !await this.hostService.hadLastFocus()) {
    this.tooltip.renderState(this.state);
    return;
}

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• https://api.github.com/graphql
  • Triggering command: /usr/bin/gh gh run view 23560432186 --json jobs --jq .jobs[] | select(.conclusion == "failure") | {name: .name, id: .databaseId} : if 'hygiene' in l.lower() or 'lint' in l.lower(): print(f'{i}: {l}') (http block)
• https://api.github.com/repos/microsoft/vscode/actions/jobs/68598610598/logs
  • Triggering command: /usr/bin/gh gh api repos/microsoft/vscode/actions/jobs/68598610598/logs (http block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

Fix the failing GitHub Actions workflow "Code OSS / Linux / Electron (pull_request)".
Analyze the workflow logs, identify the root cause of the failure, and implement a fix.
Job ID: 68598610688
Job URL: /microsoft/vscode/actions/runs/23560432186/job/68598610688?pr=304877

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