v0.12.0

Commits since v0.11.0:
b949b8a Release v0.12.0
14c944f feat(macos): inline dxr::ModeSwitch disparity ramp
e05ae48 feat(windows): smooth 2D<->3D mode-switch ramp via dxr::ModeSwitch
8173b09 feat(android): add launcher icon suite from the 2D workspace logo
eeeff53 docs: XR_EXT_view_rig render-ready views are the primary Kooima path on all platforms
d9bf76e ci: bump actions to Node 24 runtimes ahead of the June 16 default flip
2375c59 feat: single worst-case atlas swapchain + per-tile imageRect (multiview-tiling)
646b4ea feat: window-space UI bar by default + debug.dxr.mode adb hook
3731b7a feat(android): interim widget button bar (Open / Mode / Anim) while runtime#506 is open
23c9618 feat(android): tap-to-show button bar via window-space layer — dormant pending runtime#529
950295a fix(android): double-tap = instant viewpoint reset, not model reload
ec83686 feat(android): W7 — consume runtime render-ready views via XR_EXT_view_rig [#396]
72d1f8a feat(android): add Android leg over shared model_common (OOP, CNSDK-free)