The desktop app's WebView creates runtime data keyed by the Tauri bundle
id (ai.unsloth.studio) at first launch, not at install time, so the
uninstallers never removed it. A leftover WebKit/WebView2 cache then
serves a stale frontend bundle to the next install, showing old styles
after a supposedly clean reinstall.
uninstall.sh: remove ~/Library Caches/WebKit/Application Support/
HTTPStorages/cookies/saved state/prefs on macOS and the XDG cache/data/
config/state dirs on Linux; stop the desktop app binary first.
uninstall.ps1: remove LOCALAPPDATA (EBWebView profile) and APPDATA dirs
for the bundle id; stop the desktop app and any msedgewebview2.exe
helper holding handles on them first.
Adds tests/sh/test_uninstall_webview_data.sh running the full script
against a fixture HOME for both OS branches.
2e3d0c151c