v0.3.0 — update checker

What's new

• Check for Updates… item in the menu bar menu — pings the GitHub API for the latest release and offers to open the release page when a newer version is available.
• Silent on-launch check (5s after start, throttled to once per 24 hours) that pops a dialog only when there's actually an update.

Install

1. Download `ChromeDispatch-0.3.0.dmg`, drag the app to `/Applications`.
2. First launch: right-click → Open (unsigned, Gatekeeper warns once).

Upgrading

Replace the bundle in `/Applications`. Existing mappings carry over unchanged.