fix(pi): add snap node compatibility diagnostics and documentation

- Added detailed error logging to detect snap node compatibility issues
- When Pi process exits with code 1, log helpful diagnostic info including node path
- Add hint to check for snap node and reinstall via apt/nvm
- Create SNAP_NODE_COMPATIBILITY.md with full troubleshooting guide
- Document root cause: snap node has file descriptor incompatibility with Bun.spawn stdin pipes
- Provide clear installation instructions for NodeSource and nvm alternatives

src/servers/api/terminal/templates/starship-officer.toml

@@ -1,9 +1,10 @@
-format = "$env_var:$hostname $directory $character"
+format = "$username:$hostname $directory $character"
 
-[env_var]
-variable = "OFFICER_TERMINAL_USER"
-format = "[$env_value]($style)"
-style = "bold #0891B2"
+[username]
+show_always = true
+format = "[$user]($style)"
+style_user = "bold #0891B2"
+style_root = "bold red"
 
 [hostname]
 ssh_only = false