Added assets

doc/README.md

@@ -5,6 +5,7 @@ This directory contains project documentation for `git-tui`.
 ## Modules
 
 - [`doc/architecture.md`](architecture.md) - architecture and module responsibilities.
+- [`doc/branding.md`](branding.md) - logo asset and branding usage.
 - [`doc/usage.md`](usage.md) - installation, runtime requirements, and user workflow.
 
 ## Conventions

doc/branding.md

@@ -0,0 +1,20 @@
+# Branding
+
+## Logo Asset
+
+- Primary vector logo: [`assets/logo-avatar.svg`](../assets/logo-avatar.svg)
+- Primary avatar image: [`assets/logo-avatar.png`](../assets/logo-avatar.png)
+
+## Design Intent
+
+- The avatar combines a terminal frame and a Git branch shape to represent command-line Git workflows.
+- The icon remains legible at small square sizes for profile avatars.
+
+## Usage
+
+- Recommended file: `assets/logo-avatar.png` (`1024x1024`, RGBA).
+- Use `assets/logo-avatar.svg` for scalable documentation and print contexts.
+
+## Cross References
+
+- Documentation index: [`doc/README.md`](README.md)