[FEATURE]: Branded Windows installer (currently generic NSIS)

[AdiY00]

Feature hasn't been suggested before.

• [x] I have verified this feature I'm about to request hasn't been suggested before.

Describe the enhancement you want to request

@iamdavidhill

The Windows installer has several branding issues:

1. Icon: Displays the default (ugly) NSIS icon instead of OpenCode's
2. Installer UI: Missing branded header and sidebar images, making the installation experience look generic
3. Filename: Currently opencode-desktop-windows-x64.exe — doesn't indicate it's an installer. Could be something like OpenCode Desktop Installer.exe

Solution

1. Add NSIS configuration

Update packages/tauri/src-tauri/tauri.conf.json:

"bundle": {
  // ... existing config
  "windows": {
    "nsis": {
      "installerIcon": "icons/icon.ico",
      "headerImage": "icons/nsis-header.bmp",
      "sidebarImage": "icons/nsis-sidebar.bmp"
    }
  }
}

2. Rename installer output

The installer filename is controlled by the build/release process — needs investigation into where this is configured (likely CI workflow or Tauri bundler settings).

Assets Needed

Asset	Format	Dimensions	Purpose
installerIcon	.ico	-	Installer executable icon (already exists: icons/icon.ico)
headerImage	.bmp	150px × 57px	Appears at the top of installer pages (except first page)
sidebarImage	.bmp	164px × 314px	Appears on the Welcome and Finish pages

Reference

• Tauri NSIS Config Docs