sync with labv2.nix + standalone flake with toDisk app

Previous history (https://git.sagar.ch/dotfiles/labv2.nix/commits/branch/master/modules/apps/vmix):
- c359054 daku working!
- 8de5cff fix integer overflow in vmix network lib
- 9c25a66 daku on 25.05. with ollama
- 385a3bf vmix enables relaxed sandbox
- c363da1 restructure vmixLib into linux/windows subattrs with OS-specific customizeImage
- edd4dc2 vmix: port namespace model and module improvements from conf.nix
- 6666ecf vmix: add SPICE support, install virtio guest tools with SPICE agent
- 46f5671 vmix: add QEMU guest agent channel for Windows VMs
- e1fea34 vmix: add Win11 LTSC 2024 image, refactor VirtIO driver selection
- c27ae68 vmix: make customizeImage chroot-sandboxed by default, opt-in impure
- 305fbac virt customize needs chroot for now due to usr bin env things. could be fixed later
- 264d30f vmix: add win10 VM on desk, disable SMB signing for guest Samba access
- 9b64f51 vmix: split Windows templates into per-category files, add comprehensive debloat
- ef91bf8 vmix: fix missing parent registry keys in Windows templates
- f87f340 win10 VM on panda with AMD GPU + USB passthrough
- 38e474f vmix: split Windows build into Audit Mode install + composable templates
- a6a8db3 vmix: win11 support, remove build VNC, switch VMs to SPICE
- 6cf5a21 generalize stage sets bg color, accent color and sets visual effects to performance
- a84849f remove rdp template since it doesn't even work
- 5245263 vmix: best performance template + generalize cleanup
- ab12dd3 vmix: use CopyProfile for best performance visual effects
- bce3326 vmix: CopyProfile for best performance visual effects
- 2496107 vmix: add app templates (7zip, VLC, ImageGlass, Edge WebView, VC++ runtimes)
- 29a6123 wip: debug default associations xml
- 2a2e5f5 vmix: fix DefaultAssociations.xml cmd.exe escaping
- cc6ff9d vmix: move DefaultAssociations.xml to template only
- a4a78ec vmix: add removeWMP template to remove Windows Media Player
- 3fe56de vmix: improved Edge removal (files, shortcuts, scheduled tasks)
- a491767 vmix: fully remove Edge via post-oobe AppxPackage removal
- 6ca1619 vmix: remove Edge DevToolsClient SystemApps + AppxPackage
- 0c1ec35 vmix: sandboxie windows app template
- 628bbd2 vmix: add Sandboxie-Plus template
- f055a41 vmix: reorganize templates, add file associations, remove Paint
- 34326f4 vmix: set Thorium as default browser via PS-SFTA in post-oobe
- 86af258 vmix: Active Setup for default browser (all users, no post-oobe needed)
- 35b8cb0 remove vnc display from thorium template
- c7e0af6 vmix: fix Win11 generalize timeout + UCPD disable for URL associations
- 43a1345 vmix: add Office 2024 template + Ohook activation in generalize
- 03bbce0 vmix: updated office installation xml. more privacy options enabled
- 790a0ee vmix: thorium installation - hide SFTA window
- a0e5c18 vmix: fix office install.bat call + add privacy registry policies
- 3df38ca vmix: fix Ohook activation + suppress Office theme dialog
- df39ba3 vmix: remove sandboxie shortcut from desktop
- 50d5972 vmix: skip Sandboxie desktop shortcut via installer flag
- ee2fa0f vmix: fix win10 default browser
- 938315b vmix: windows: set accent color to automatic. remove accent color from unnecessary elements
- beceda8 vmix: allow ISO-only VMs without OS disk, add WinPE VM to panda

Flake outputs: overlays.default, nixosModules.default, lib, apps.toDisk

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

lib/images/windows/templates/apps/thorium.nix

@@ -0,0 +1,40 @@
+# Install Thorium browser and set as default via Active Setup (all users)
+# PS-SFTA is stored in Program Files and runs at each user's first logon.
+# post-oobe.cmd also runs SFTA for the initial user.
+{ pkgs, makeFilesISO, ... }:
+let
+  installer = pkgs.fetchurl {
+    url = "https://github.com/Alex313031/Thorium-Win/releases/download/M138.0.7204.303/thorium_AVX2_mini_installer.exe";
+    hash = "sha256-43daDPX4N7NbVx1UfmO6KDMKKufhmpeQMO7qTeRggqo=";
+  };
+  sfta = pkgs.fetchurl {
+    url = "https://raw.githubusercontent.com/DanysysTeam/PS-SFTA/master/SFTA.ps1";
+    hash = "sha256-Prb23uP9jJFgQEIGC51ljwjshdP9ChR2kRnf14vDCFE=";
+  };
+in {
+  name = "thorium";
+  cdroms = [ (makeFilesISO { name = "thorium"; files = [ installer sfta ]; }) ];
+  auditScript = ''
+    @echo off
+    echo Installing Thorium browser...
+    copy D:\thorium_AVX2_mini_installer.exe C:\thorium_installer.exe
+    start /wait C:\thorium_installer.exe --silent --system-level --do-not-launch-chrome
+    del /q C:\thorium_installer.exe
+    echo Waiting for setup.exe to finish...
+    :wait_loop
+    tasklist /fi "imagename eq setup.exe" 2>nul | find /i "setup.exe" >nul
+    if not errorlevel 1 (
+      timeout /t 5 /nobreak >nul
+      goto wait_loop
+    )
+
+    echo Setting up Thorium as default browser for all users...
+    :: Store SFTA in Program Files (survives sysprep as installed program)
+    mkdir "C:\Program Files\vmix" 2>nul
+    copy D:\SFTA.ps1 "C:\Program Files\vmix\SFTA.ps1" >nul
+    :: Register Active Setup: runs at first logon for every new user
+    reg add "HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\vmix-default-browser" /v "(Default)" /t REG_SZ /d "Set default browser" /f >nul
+    reg add "HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\vmix-default-browser" /v "StubPath" /t REG_SZ /d "powershell -WindowStyle Hidden -ExecutionPolicy Bypass -Command \". 'C:\\Program Files\\vmix\\SFTA.ps1'; Set-FTA 'ThoriumHTM' '.htm'; Set-FTA 'ThoriumHTM' '.html'; Set-PTA 'ThoriumHTM' 'http'; Set-PTA 'ThoriumHTM' 'https'\"" /f >nul
+    reg add "HKLM\SOFTWARE\Microsoft\Active Setup\Installed Components\vmix-default-browser" /v "Version" /t REG_SZ /d "1,0,0,0" /f >nul
+  '';
+}