fix(ui): normalize shell output carriage returns

[Hona]

Summary

• Normalize carriage returns in web shell output so progress-style command output renders as separate lines.
• Matches the TUI-style display path without adding terminal emulation.

Test

• bun typecheck from packages/ui in the main worktree

[Copilot]

Pull request overview

Normalizes carriage returns in the web UI’s bash tool output so progress-style command output (that uses \r / \r\n) renders as line-separated text, aligning behavior with the non-terminal-emulation display approach.

Changes:

• Convert \r and Windows-style \r\n sequences in shell output to \n after ANSI stripping.
• Improve readability of progress/overwrite-style output in the web shell transcript view.

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