style(ui): improve terminal output with colors and better formatting

[nolanneff]

Summary

Improved the CLI user interface by adding colors, symbols, and more structured output. This enhances readability and provides clearer visual feedback for common git operations.

Changes

Added

• Green checkmarks, yellow warnings, and red error symbols to terminal output
• Cyan highlighting for progress spinners and key configuration labels
• Bold and dimmed text styles to improve visual hierarchy in menus
• Bulleted lists for file changes and configuration displays

Fixed

• Improved the PR preview rendering when editing content in an external editor

Changed

• Replaced plain text prompts with structured menus and action keys
• Updated the configuration view to be more readable with color-coded status values
• Standardized progress spinner templates with consistent styling

Notes

• Integrated the console crate to handle terminal styling and ANSI colors
• CLI prompts now use structured menus instead of single-line prompt strings

Testing

• Verified config show command displays the new colored layout
• Tested commit and PR workflows to ensure spinner and success messages appear correctly
• Confirmed manual branch selection and editing functionality maintains the new styling

Summary by CodeRabbit

• Style
  • Enhanced interface styling with colored output and visual indicators (✓, ✗, →).
  • Applied color-coded styling to status messages, spinners, and progress indicators.
  • Updated prompts with action menus and styled labels.
  • Improved configuration and status displays with colored fields, bold headers, and formatted indicators.

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[coderabbitai]

Caution

Review failed

The pull request is closed.

📝 Walkthrough

Walkthrough

The changes add styled console output across four source files, replacing plain text messages with colored text, icons, and updated spinner templates. No functional changes or public API modifications are introduced.

Changes

Cohort / File(s)	Change Summary
Spinner and progress message styling src/git.rs, src/main.rs, src/pr.rs	Updated spinner templates to include cyan color prefixes and emoji icons (✓, ✗, →, etc.). Replaced plain-text progress messages with styled variants. Added console::style imports.
Interactive prompt and menu styling src/ui.rs	Introduced styled output for all user prompts with colored headers, action menus, and dimmed arrow indicators. Added explicit action listings (numbered/lettered choices) and "Choice:" prompt labels with cyan styling.
Configuration and status output styling src/main.rs	Styled config display headers, colored boolean values, and status indicators (green checkmarks for success, red crosses for errors, yellow warnings). Replaced hyphen-prefixed plain text with styled icon-based messages.
Error and info message styling src/pr.rs	Replaced plain text error/informational messages for API key, branch restrictions, and commit steps with styled output using colored icons and guidance arrows.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~15 minutes

Possibly related PRs

• refactor(core): modularize codebase and add PR generation #8: Modifies the same four source files (src/git.rs, src/main.rs, src/pr.rs, src/ui.rs) to introduce console styling, spinner templates, and user-facing output formatting.

Poem

🐰 With colors bright and icons clean,
The output's now the best I've seen!
Checkmarks green and spinners cyan,
Our prompts are styled—oh what a plan! ✨
The console shines, the user smiles!

✨ Finishing touches

• 📝 Generate docstrings

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