Commit 14313cf changed the Tauri bundle identifier from
uk.co.corbel.magnotia to consulting.corbel.lumotia. Tauri 2 keys both
app_data_dir and the webview's data store (localStorage, IndexedDB,
cookies, service worker, cache) plus all Tauri-plugin state files
(window-state geometry, autostart enable flag) by the identifier.
Without an explicit migration, every user's webview state was
silently orphaned on first launch under the new identifier; the
JS-side migrateLocalStorageKey helper introduced in 1608109 ran
against an empty store and no-op'd.
Fix: in the Tauri setup hook, before webview navigation, resolve the
legacy app_data_dir under the OLD bundle identifier and recursively
copy it to the new identifier's app_data_dir via an atomic staging
rename. Idempotent: legacy preserved as a backup; if both paths
exist post-rename, a warning is logged and the new path is used
unchanged.
Regression tests cover the migrate-only, both-exist, no-legacy, and
idempotent (run twice) cases against synthetic legacy/new paths.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Jake
3f4e5cc9a4