feat(tui): add terminal highlighting improvements#391
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Port three TUI rendering improvements: 1. Diff rendering: shaded green/red backgrounds via terminal color level detection (truecolor/256-color/ansi16) with light/dark theme awareness. Falls back to foreground-only colors on ANSI-16 terminals. 2. Syntax highlighting: replace tree-sitter-bash with syntect+two-face for multi-language theme-aware highlighting (~250 languages, Catppuccin Mocha default). Used in both bash command rendering and markdown fenced code blocks. 3. Markdown rendering: fenced code block syntax highlighting with language detection from info strings, local file link rendering with cwd-relative paths, and URL-preserving adaptive word wrapping. 🤖 Generated with [Nori](https://noriagentic.com) Co-Authored-By: Nori <contact@tilework.tech>
- Update rustls-webpki 0.103.4 -> 0.103.10 (RUSTSEC-2026-0049) - Ignore RUSTSEC-2026-0002 (lru 0.12.x pinned by ratatui fork) 🤖 Generated with [Nori](https://noriagentic.com) Co-Authored-By: Nori <contact@tilework.tech>
Apply the background color to gutter spans and pad each diff line with trailing spaces to fill the complete rendering width. This ensures the green/red tint covers from left edge to right edge, not just behind the text content. 🤖 Generated with [Nori](https://noriagentic.com) Co-Authored-By: Nori <contact@tilework.tech>
The background tint now covers the complete line from left to right: - prefix_lines propagates Line background color onto prefix spans - push_wrapped_diff_line pads to width + outer_pad so trailing space accounts for the 4-char indent that prefix_lines will prepend 🤖 Generated with [Nori](https://noriagentic.com) Co-Authored-By: Nori <contact@tilework.tech>
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Summary
Test plan
cargo clippy -p nori-tui --all-features --tests)just fmtcleancargo test -p tui-pty-e2e)