ZenDesktop v1.0.28

[1.0.28] - 2026-08-16

Fixed

• Mouse stutter every few seconds — two UI-thread blockers were fixed:
  • The Dropbox/Google Drive account email was fetched with a blocking
    HTTP call (8–15 s timeouts) directly on the UI thread, retried every
    5 s when it failed. It now runs on a worker thread and the result is
    posted back via WM_ZEN_DROPBOX_EMAIL / WM_ZEN_GDRIVE_EMAIL.
  • Every cloud listing poll (5 s) repainted the whole app (render_all)
    even when nothing changed. Now the listing is compared (PartialEq)
    and only the affected widget fence is repainted; the same applies to
    Spotify snapshots/queue and sync reports.
• Idle CPU churn — the 1 s widget tick no longer repaints the cloud
  widget fences (they repaint on their own data), and Spotify only
  repaints while actually playing (animated progress bar).

Changed

• Lower memory ceilings — JUMBO (256 px) icon caches capped at
  128 per-file / 64 per-extension (worst case 96 MB → 48 MB), thumbnail
  cache 128 → 64 entries, and the full-screen magnetic-snap guide buffer
  (~8 MB at 1080p, ~16 MB at 4K) is now freed when a drag ends instead of
  living for the whole session.
• Cleanup — removed 10 leftover debug/probe files (settings probe
  screenshots, preview HTML stubs, one-off patch scripts).

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