- preview_footage_media decodes the original from the footage's actual
first stream of the kind instead of hardcoded 0/1, fixing audio-first
and other atypical stream layouts (with a unit test).
- spawn_modal now probes for a nested window update and defers the
build instead of silently dropping the dialog — the phase-7
Preferences/Action Search fix applied centrally to every modal
(export, proxy settings, project manager, progress dialogs).
- The gpui_wgpu atlas no longer double-copies identity-format uploads,
leaving a single CPU staging copy (gpui RenderImage ownership) plus
the GPU upload on the onscreen path; the residual copy and the
IOSurface route to true zero-copy are documented in the M15 design.
Mike-Solar
6dc8285f2a