Quiver 2.1.2

Bug-fix and polish release. Fixes launcher self-update cache handling, startup thread errors, GitHub rate-limit guidance, and adds an empty-library onboarding state.

Fixes

Launcher self-update

• Empty LastKnownVersion no longer blocks conditional requests forever; a 304 with no cached version retries without If-None-Match so the release tag is learned
• Partial cache writes removed — LastCheckTime and LastKnownVersion are saved only after a valid release tag is parsed; network/parse failures no longer corrupt update_check.json
• Concurrent update checks are serialized with a semaphore so startup and manual checks cannot race
• Shared GitHub fetch logic uses LauncherUpdateService for client setup, conditional requests, and JSON parsing
• “Up to date” dialog no longer shows a double v in the version string (e.g. vv2.1.2)

GitHub rate limits

• Update check failures from a 403 / rate limit now show the same guided dialog as game downloads, with steps to create a token
• Open Settings on that dialog takes you directly to Settings → Advanced → GitHub API Token

Startup stability

• “Call from invalid thread” on startup is fixed — library loading and empty-state UI updates are marshaled to the UI thread
• Update icon progress bar no longer appears stuck on launch when bindings were pointed at the wrong data context

Improvements

Empty library

• When your library has no apps, the main view shows guidance and two actions:
  • Add App Manually — opens the new app entry form
  • Browse Community Catalog — opens the Quiver Community App Catalog review view (New filter)

UI

• App Catalog sidebar badge has slightly more spacing from the label

Tests

• Added unit tests for release JSON parsing, conditional request rules, and tag extraction from sample GitHub responses