chore: remove emojis from all tracked text

[mpfaffenberger]

Summary

Perform a repository-wide sweep and remove emoji characters from all tracked text. Use concise plain-text replacements where an icon currently carries useful meaning.

Scope

• Scan source code, tests, documentation, comments, docstrings, prompts, configuration, fixtures, examples, and user-facing UI copy.
• Remove emoji Unicode characters from display names, status labels, banners, help text, and other product copy.
• Replace meaningful icon-only labels with accessible plain-text wording rather than silently deleting their meaning.
• Update affected assertions, snapshots, fixtures, and documentation.
• Do not modify binary image assets merely because they depict the mascot; this issue concerns emoji characters in tracked text.

Acceptance criteria

• A reproducible repository scan reports no emoji characters in tracked text files.
• No emoji characters remain in source, tests, documentation, comments, docstrings, prompts, configuration, fixtures, examples, or UI strings.
• An automated check prevents emoji characters from being reintroduced into tracked text.
• Existing behavior remains intact except for the intended copy and presentation changes.
• The full test suite and required linters pass.