--name flag does not display session name in prompt UI like /rename does

Description

When launching Claude Code with the --name flag (e.g., claude --name "MySession"), the session name is correctly stored and visible in the /resume list, but it does not display the visual prompt decoration that /rename produces.

Expected behavior

--name should produce the same visual result as /rename:

• Session name shown right-aligned in the prompt separator bar
• Separator lines change to the accent color (teal/cyan)

Actual behavior

• --name: Name is set internally (appears in /resume list), but the prompt area shows no name and retains default styling
• /rename: Name appears in the prompt separator bar with colored lines

Steps to reproduce

1. Launch: claude --name "TestSession"
2. Observe the prompt area — no session name visible, default separator styling
3. Within the same session, run /rename TestSession
4. Observe the prompt area — name now appears right-aligned with colored separator

Screenshots

After /rename — name visible in prompt bar:

The session name appears right-aligned in the separator bar above the prompt, and the separator lines change to an accent color.

After --name launch — no visual indicator:

The prompt area shows the standard layout with no session name. The status line shows model, project, branch, context %, and time only.

Environment

• Claude Code CLI (latest)
• macOS
• Terminal: iTerm2