- viewers show the 480px proxy immediately and a background thread
fills the sequence-resolution frame (per-monitor in-flight job,
generation-based staleness, playback skips full-res)
- preferences dialog complete: cache dir (now consumed by
default_disk_cache_path), proxy policy/divider, snapshot interval
(write-through era autosave), default transition length, audio
in/out devices (new facade device-enumeration exports; audio init
from config — playback was never creating the audio instance),
language/theme/renderer backend, all persisted via config
- shortcut map (src/shortcuts.rs): space/J/K/L, I/O, S split, A/^A,
⌘Z/⌘⇧Z, ⌘N/⌘O/⌘S/⌘E/⌘Q, frame step, Home, track zoom; dispatch
shares the menu action path and stays silent over modals
- screenshots: preferences dialog zh/en captured and reviewed