fix(tui): complete Rune mascot rebrand

[BunsDev]

Summary

• rename the TUI mascot module from rustle to mascot
• rename RustlePose/rustle_lines_for call-sites to companion/mascot terminology
• rename public mascot assets to Rune.png and Pirate-Rune.png
• update docs references and add a smoke test to prevent legacy Rustle names from coming back

Verification

• node scripts/mascot-rebrand.test.mjs
• cargo fmt -p claurst-tui --check
• cargo test -p claurst-tui mascot
• cargo check -p claurst
• git diff --check

Fixes #54

[vercel]

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Project	Deployment	Actions	Updated (UTC)
docs	Ready	Preview	Jun 11, 2026 3:08am

[Copilot]

Pull request overview

This PR completes the TUI “Rustle” → “Rune” rebrand by renaming the mascot module/types/call-sites, updating docs and public assets, and adding a small Node smoke test to prevent legacy identifiers and filenames from reappearing.

Changes:

• Rename the TUI mascot module/API from rustle/RustlePose/rustle_lines_for to mascot/CompanionPose/mascot_lines_for, updating render + app tick plumbing.
• Update docs and CSS class naming from tui-rustle → tui-mascot, plus README/COVEN/attribution references.
• Add a scripts/mascot-rebrand.test.mjs smoke test and rename mascot image assets to Rune.png / Pirate-Rune.png.

Reviewed changes

Copilot reviewed 13 out of 15 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src-rust/crates/tui/src/render.rs	Switch welcome rendering to CompanionPose and new app field.
src-rust/crates/tui/src/mascot.rs	Rename pose type + slug helper, update glyph builders and tests.
src-rust/crates/tui/src/lib.rs	Export mascot module and remove rustle export.
src-rust/crates/tui/src/familiar_theme.rs	Update module references in docs to crate::mascot.
src-rust/crates/tui/src/familiar_card.rs	Update imports and pose handling to CompanionPose.
src-rust/crates/tui/src/app.rs	Rename pose field + tick/look-down APIs to companion terminology.
src-rust/crates/cli/src/main.rs	Call tick_companion_pose() in the interactive loop.
scripts/mascot-rebrand.test.mjs	Add smoke test guarding against legacy Rustle identifiers/assets.
README.md	Update mascot module path reference to mascot.rs.
public/Rune.png	Add renamed Rune mascot asset.
docs/src/style.css	Rename docs CSS class .tui-rustle → .tui-mascot.
docs/src/content/welcome-screen.js	Update markup to use the new .tui-mascot class.
COVEN.md	Update rebrand checklist section to match the new naming.
ATTRIBUTION.md	Update attribution note to reflect completed internal rename.

Comments suppressed due to low confidence (2)

src-rust/crates/tui/src/mascot.rs:18

• The module docs say mascot_lines_for is a “legacy entry point” that “routes through the theme/card path”, but the function currently just resolves a theme and calls archetype_lines (no card rendering). This comment is misleading and should be updated to match the actual behavior.
  src-rust/crates/tui/src/mascot.rs:496
• This test’s name/comment say it verifies palette differences while keeping glyph shape the same, but it currently compares two different archetypes (kitty vs nova) and only checks that the text differs. That doesn’t validate palette handling and can confuse future refactors.

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