feat: Electron desktop app, native ffmpeg export, fully static web

- apps/desktop: Electron shell serving the static web build over a
  privileged opencut:// protocol; exports stream frames over IPC to a
  bundled ffmpeg (libx264/libvpx-vp9, BT.709 tagged) with backpressure.
  electron-builder packaging: AppImage, deb, rpm.
- apps/web: dead backend deleted (better-auth, drizzle/pg, upstash,
  botid, freesound proxy, blog, rss, env validation); next build emits
  a zero-env static export; /editor/[project_id] -> /editor?project=.
- Native exporter mirrors SceneExporter; activates when the preload
  bridge is present; web keeps the mediabunny path.
- Docker self-hosting now builds and serves the static export via nginx.
- Release workflow: v* tags publish static web tarball + Linux packages.
- Changelog 0.4.0; README/AGENTS/CONTRIBUTING/roadmap updated.
- GPUI/Rust rewrite parked on branch rust-rewrite.

1 files changed, 0 insertions, 27 deletions

diff --git a/apps/desktop/script/setup.ps1 b/apps/desktop/script/setup.ps1
deleted file mode 100644
index 63f7fd1a..00000000
--- a/apps/desktop/script/setup.ps1
+++ /dev/null
@@ -1,27 +0,0 @@
-# Installs the native build tools GPUI needs to compile on Windows.
-# Run script/setup-rust.ps1 first if you don't have Rust installed yet.
-
-$ErrorActionPreference = "Stop"
-
-function Check-VSBuildTools {
-  $vswhere = "C:\Program Files (x86)\Microsoft Visual Studio\Installer\vswhere.exe"
-
-  if (-not (Test-Path $vswhere)) {
-    return $false
-  }
-
-  $result = & $vswhere -latest -requires Microsoft.VisualStudio.Workload.NativeDesktop -property installationPath
-  return $result -and $result.Trim().Length -gt 0
-}
-
-if (-not (Check-VSBuildTools)) {
-  Write-Output ""
-  Write-Output "Visual Studio Build Tools with 'Desktop development with C++' not found."
-  Write-Output ""
-  Write-Output "Install it from: https://visualstudio.microsoft.com/visual-cpp-build-tools/"
-  Write-Output "Check the 'Desktop development with C++' workload during setup, then re-run this script."
-  Write-Output ""
-  exit 1
-}
-
-Write-Output "Desktop native dependencies ready."