chore: rebrand client and add icon tooling

BUILD.md

@@ -1,6 +1,6 @@
-# Building OpenCode Client Binaries
+# Building CodeNomad Binaries
 
-This guide explains how to build distributable binaries for OpenCode Client.
+This guide explains how to build distributable binaries for CodeNomad.
 
 ## Prerequisites
 
@@ -81,17 +81,17 @@ Binaries are generated in the `release/` directory:
 
 ```
 release/
-├── OpenCode Client-0.1.0-mac-universal.dmg
-├── OpenCode Client-0.1.0-mac-universal.zip
-├── OpenCode Client-0.1.0-win-x64.exe
-├── OpenCode Client-0.1.0-linux-x64.AppImage
+├── CodeNomad-0.1.0-mac-universal.dmg
+├── CodeNomad-0.1.0-mac-universal.zip
+├── CodeNomad-0.1.0-win-x64.exe
+├── CodeNomad-0.1.0-linux-x64.AppImage
 └── ...
 ```
 
 ## File Naming Convention
 
 ```
-OpenCode Client-{version}-{os}-{arch}.{ext}
+CodeNomad-{version}-{os}-{arch}.{ext}
 ```
 
 - **version**: From package.json (e.g., `0.1.0`)
@@ -215,6 +215,16 @@ Edit `package.json` → `build` section to customize:
 
 See [electron-builder docs](https://www.electron.build/) for details.
 
+## Brand Assets
+
+- `images/CodeNomad-Icon.png` — primary asset for in-app logo placements and the 1024×1024 master icon used to generate packaged app icons
+
+To update the binaries:
+
+1. Run `node scripts/generate-icons.js images/CodeNomad-Icon.png electron/resources` to round the corners and emit fresh `icon.icns`, `icon.ico`, and `icon.png` files.
+2. (Optional) Pass `--radius` to tweak the corner curvature or `--name` to change the filename prefix.
+3. If you prefer manual control, export `images/CodeNomad-Icon.png` with your tool of choice and place the generated files in `electron/resources/`.
+
 ## Clean Build
 
 Remove previous builds: