Catalog storage and update checks

P5 Archive Browser v0.20 (Build 35)

Build 35 makes large local catalogs easier to manage and adds the same public
GitHub update-check workflow used by the other P5 apps.

What changed

• Catalog storage total: Settings ▸ Catalog Data reports the main SQLite
  database plus active WAL and shared-memory sidecars.
• Preferred Backup Folder: Manual backup panels start in the chosen folder,
  and automatic pre-reset backups use it. The destination can be on another
  mounted drive.
• Unavailable-drive protection: If the preferred backup folder is missing
  or not writable, reset stops before changing the catalog.
• Clean backup names: Manual backups end in exactly one .sqlite.
• Public update checks: Browser checks
  macvfx/P5-Archive-Browser at most once per day and alerts only when a newer
  version/build exists. P5 Archive Browser ▸ Check for Updates… performs an
  immediate check.

Update checks read public GitHub release metadata only. Browser never downloads
or installs an update automatically; Download opens the public release page.

Moving the active catalog database to another drive remains planned. That will
require a guarded backup, database close, verified copy, relaunch, and rollback
workflow rather than moving an open SQLite file.

This remains a read-only archive-catalog application. It does not load tapes,
restore files, submit archive jobs, or modify data on the P5 server.

See the
Tester Notes
for the recommended test pass and the
full pre-release notes
for the complete feature list.