[rumpl]

Summary

Replace the tall block-letter startup banner with a lowercase, bold italic docker agent wordmark, sampled into braille dots for smooth edges.

• Shared by both TUIs and colored with the active theme's accent.
• Reduces the banner from 13 rows to 6; updates the minimum width to 76 columns.
• Adds coverage for dimensions and braille-only content, and updates the centering assertion.

New banner

       ⣿⡿                 ⣸⣿⠁                                                   ⣤⡶
 ⢠⣶⡿⢷⣶⣿⡇⢀⣴⣾⠿⢷⣦⡀ ⣠⣶⠿⢷⣦⡀⢀⣿⡟⣠⣶⠶⠂⢠⣶⡾⢿⣶⡄ ⣴⣶⣴⡿⠂   ⣠⣶⠿⢷⣦ ⢀⣴⣾⠿⣦⣶⡶ ⣠⣶⠿⢷⣦⡀ ⣶⣶⡶⢾⣷⡆⠠⢾⣿⡷⠆
⢠⣿⡏  ⣿⣿ ⣾⣿⠁ ⢈⣿⡇⢸⣿⠃  ⠉⠁⢸⣿⣿⣿⡇ ⢠⣿⣯⣤⣤⣿⡷⢀⣿⡟⠁    ⢀⣤⣤⣶⣾⣿ ⣼⣿⠁ ⢸⣿⡇⢸⣿⣧⣤⣤⣿⡇⢰⣿⡏ ⢰⣿⡇ ⣾⣿
⠘⣿⣧⣀⣴⣿⡏ ⢻⣿⣄⣠⣾⡿⠁⠸⣿⣄⣠⣾⡖ ⣿⡿⠁⢹⣿⡀⠈⢿⣧⣀⣴⣶⠄⣸⣿⠃     ⢺⣿⣄⣤⣿⡏ ⢻⣿⣤⣤⣾⣿ ⠘⣿⣦⣀⣴⡦ ⣼⣿  ⣼⣿ ⠠⣿⣇⡀
 ⠈⠉⠉⠉⠉⠁  ⠉⠉⠉⠉   ⠈⠉⠉⠁  ⠉⠁ ⠈⠉⠁  ⠉⠉⠉⠁ ⠉⠉       ⠉⠉⠁⠉⠁ ⣤⣍⣉⣡⣿⡇  ⠈⠉⠉⠉  ⠉⠉  ⠉⠉  ⠉⠉⠁
                                                  ⠙⠛⠛⠛⠋

[Copilot]

🟢 Approval recommended

The compact banner update has no active review issues.

No open issues 🎉

What changed in this PR

Replaces the shared TUI startup banner with a compact, lowercase braille “docker agent” wordmark, retaining theme-controlled coloring.

Changes:

• Reduces banner height from 13 to 6 rows and increases its width requirement to 76 columns.
• Adds checks for dimensions, braille-only artwork, and absence of embedded styling or trailing spaces.
• Updates the chat centering assertion for the new banner.

File	Description
pkg/​tui/​page/​chat/​layout_position_test.go	Updates the horizontal centering assertion.
pkg/​tui/​banner/​banner.go	Replaces the artwork and updates banner dimensions.
pkg/​tui/​banner/​banner_test.go	Adds dimension and content validation.

_{Review effort: Balanced}

[Copilot]

🟡 Changes recommended

The default banner wraps in 60–77-column terminals, causing incorrect cursor positioning and repaints because wrapped lines are still counted as single rows.

1 open issue

• Hide banner when it exceeds terminal width to prevent row misalignment · New

_{Review effort: Balanced}