FXG Desk Windows v0.1.3 - complete offline runtime

This package is an isolated experimental build.
WGC GPU texture -> D3D11 VideoProcessor BGRA->NV12 -> NV12 CPU readback -> existing hardware HEVC MFT -> fMP4.

Build profile: gpu-nv12-v1-fmp4-no-jpeg
Runtime label: v0.1.3
This package defaults to HEVC/fMP4 only: JPEG fallback is disabled for this run.
This build has not completed oneVPL/QSV video-memory-surface integration.

Run FXGDesk.exe. New installations default to 30 FPS; saved FPS preferences remain unchanged.
First launch does not start sharing. Later launches restore the saved sharing preference.
Passwords require at least 6 characters. New device codes use 6 digits; saved 8-digit codes are preserved.
If internet registration fails, run Run-Connection-Diagnostics.cmd for a read-only report.
The package includes Node, host-agent, native WebRTC module and required VC runtime.
No npm install or system-wide Node installation is needed.

Offline runtime check:
runtime\node.exe host-agent\launch.js --check

This preview installer is unsigned. Verify SHA256SUMS.txt before use.

HEVC-only playback: this version intentionally does not fall back to JPEG.
If HEVC/fMP4, MSE, hardware decode or the media request path fails, the page remains at the failure instead of hiding it with JPEG.
Use this package only to measure the HEVC/fMP4 path. A black/frozen screen is an expected diagnostic outcome when that path fails.
Collect the browser diagnostic JSON after reproducing the issue. Do not include passwords, private keys or raw media payloads.
