Show updated social preview at the top of README

README.md

@@ -1,10 +1,10 @@
 # Selfishell
 
+![Selfishell terminal-themed banner](img/social-preview.png)
+
 Selfishell is a managed Zsh development environment for macOS, Ubuntu, and
 Ubuntu on WSL.
 
-![Selfishell shell prompt showing the current directory, Git branch, and command output](img/selfishell.png)
-
 ## Quick Start
 
 Install the CLI:
@@ -30,6 +30,8 @@ Ghostty, and platform notes.
 
 ## What You Get
 
+![Selfishell shell prompt showing the current directory, Git branch, and command output](img/selfishell.png)
+
 - A consistent Zsh environment across supported macOS and Ubuntu systems.
 - A Starship prompt, useful aliases, completions, and managed shell defaults.
 - Neovim, mise-managed runtimes, CLI tools, and build tooling.