Every app module now reaches liboakengine exclusively through
oakengine_* C calls, EngineEventBridge subscriptions and app-side
handle headers (cliphandle/keyframehandle/nodevaluehandle/oakvaluehelper).
Direct C++ command construction, engine signal connect()s, and engine
type usage in MOC-visible signatures are gone: 557 -> 0 undefined
olive:: symbols in oak-editor.
- FootageJob::should_use_proxy() centralizes the proxy decision; worker
pre-decode now honors the render mode so exports always decode the
original media (previously every frame was pre-decoded from proxies)
- global Tools > Use Proxy Media toggle with footage invalidation
- ffmpeg -progress parsing for real percentage feedback while generating
- divider mode (1/2, 1/4, 1/8 of source resolution) with UI, proxy
filename tags and per-footage persistence (pdivider)
- Media Offline warning slat rendered for missing footage
- regression tests: export isolation, relink invalidation, offline slat,
progress parsing, divider arguments
- New ProxyDialog (Tools > Proxy Settings..., plus 'Proxy Settings...'
in the project panel and timeline Proxy submenus) unifying global
proxy settings, per-footage custom presets, generation and deletion
in one place instead of three scattered entry points; this also fixes
the Tools menu action opening the wrong preferences tab
- Preferences Disk tab gains an 'include audio in proxies' checkbox and
an ffmpeg executable path field (blank = auto-detect)
- Add ProxyDialog smoke tests