While WebDAV or Google Drive is the selected cloud sync backend, the
native Readest Cloud book/progress/note channels are gated off and the
file-sync engine owns library data end to end:
- isSyncCategoryEnabled returns false for book/progress/note (and their
legacy aliases) when a third-party provider is selected. A runtime
override, deliberately not written into syncCategories: the user's own
toggles persist and take effect again on switch-back. Account channels
(settings, stats, dictionaries, fonts, textures, OPDS catalogs) always
stay native.
- persistActiveCloudProvider is the single write path for provider
switching, used by the chooser, both connect/disconnect flows, and the
Drive OAuth callback (which previously bypassed the cross-window
broadcast). The broadcast carries ONLY the enabled flags plus
providerSelectedAt, never credentials or sync cursors, and only on
switch events, so a stale window's routine save cannot revert a switch.
- buildWebDAVConnectSettings no longer pre-sets enabled: activation
belongs to withActiveCloudProvider, so the fresh-connect path now gets
the syncBooks auto-flip and the providerSelectedAt stamp.
- Sync health: fileSyncStore records lastError per backend; the durable
lastSyncedAt stays in provider settings. The SettingsMenu sync row
reads Synced via provider / Sync failed and its tap (with pull to
refresh and BackupWindow, all routed through pullLibrary) runs the
file engine via the shared runActiveFileLibrarySync helper instead of
a gated native pull that would toast undefined book(s) synced.
- Mixed-fleet detection: while gated, the auto-sync interval runs a
read-only probe of /api/sync since providerSelectedAt; any newer book
row means another device still syncs natively, and a once-per-session
notice explains the fork instead of leaving it silent.
- Readest-Cloud-only affordances hide while a third-party provider is
selected: the quota row becomes a caption naming the active provider,
Auto Upload disappears from the menu and command palette, the
BookItem upload badge and the Transfer Queue Upload All button hide.
- providerSelectedAt added to both provider settings types and the
backup blacklist.
Stacked on the quota-decoupling change for #4959; requires the
metadata-parity change so gated channels lose nothing users can see.
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
Huang Xin
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