🎨 Palette: [UX improvement] Add keyboard trap exit, clear choices, and shortcut hints

[haseeb-heaven]

💡 What: Mapped \x03 (Ctrl-C) to exit actions in raw mode, exposed choices in non-interactive prompts, and added cancel shortcut hints to the UI footer.
🎯 Why: To prevent terminal keyboard traps, make available choices visible, and give users clear instructions on how to cancel TUI selections.
📸 Before/After: Visual update to prompts to include choice arrays and updated footer strings.
♿ Accessibility: Improved keyboard accessibility by explicitly providing an exit hatch for standard interrupts and making options immediately visible to screen readers using headless prompts.

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PR created automatically by Jules for task 15196289772185900456 started by @haseeb-heaven

Summary by CodeRabbit

• Bug Fixes
  • Ctrl-C now works consistently as a cancel signal across all platforms
  • UI footer messages now explicitly display available keyboard shortcuts
  • Option prompts now display available choices inline for improved readability

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[coderabbitai]

📝 Walkthrough

Walkthrough

This PR extends keyboard interrupt handling in the terminal UI to recognize Ctrl-C as an escape/cancel signal on both Windows and Unix platforms, updates UI footer text to communicate this capability, and formats non-TTY option prompts to display available choices inline.

Changes

TUI Keyboard Handling and Presentation

Layer / File(s)	Summary
Ctrl-C escape handling libs/terminal_ui.py	_read_key on Windows expands the escape condition to treat Ctrl-C (\x03) the same as Escape (\x1b), and on Unix-like platforms adds an explicit branch to return 'escape' when Ctrl-C is pressed.
UI text and option presentation libs/terminal_ui.py	_render_selector footer text is updated to explicitly state "Esc/Ctrl-C to cancel", and _select_option in non-TTY mode now includes the list of selectable options inline with the prompt title instead of displaying only the title.
Changelog documentation .jules/palette.md	New dated entry documents the TUI raw-mode keyboard interrupt handling and clearer presentation of prompt options with shortcut hints.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Poem

🐰 A rabbit hops through the keyboard with glee,
Ctrl-C now works as it ought to be!
On Windows or Unix, escape runs true,
Footers and prompts show what to do! ✨

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Title check	❓ Inconclusive	The title mentions emoji, vague framing terms, and brackets that obscure clarity; however, it does directly reference the core changes (keyboard exit, choice clarity, shortcut hints) in a way that relates to the actual changeset.	Simplify the title by removing emoji and brackets (e.g., 'Add Ctrl-C keyboard exit and improve choice visibility in TUI') to improve clarity and scannability in commit history.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch palette/tui-ux-enhancements-15196289772185900456

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In @.jules/palette.md:
- Line 1: Update the changelog entry header in .jules/palette.md by changing the
date string "2024-06-11" to "2026-06-11" so the entry matches this PR's creation
date; edit the top header line that currently reads "## 2024-06-11 - TUI
Keyboard Trap & Options Clarity" to "## 2026-06-11 - TUI Keyboard Trap & Options
Clarity".

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: dc7c4ca0-42a9-4ac9-82d7-f10b352f6061

📥 Commits

Reviewing files that changed from the base of the PR and between 2a47494 and bfa73c8.

📒 Files selected for processing (2)

• .jules/palette.md
• libs/terminal_ui.py

[coderabbitai]

⚠️ Potential issue | 🟡 Minor | ⚡ Quick win

Correct the changelog date to match this PR timeline.

Line 1 uses 2024-06-11, but this PR was created on 2026-06-11; this will make the entry appear out of sequence in historical notes.

Suggested patch

-## 2024-06-11 - TUI Keyboard Trap & Options Clarity
+## 2026-06-11 - TUI Keyboard Trap & Options Clarity

📝 Committable suggestion

‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.

Suggested change

	## 2024-06-11 - TUI Keyboard Trap & Options Clarity
	## 2026-06-11 - TUI Keyboard Trap & Options Clarity

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In @.jules/palette.md at line 1, Update the changelog entry header in
.jules/palette.md by changing the date string "2024-06-11" to "2026-06-11" so
the entry matches this PR's creation date; edit the top header line that
currently reads "## 2024-06-11 - TUI Keyboard Trap & Options Clarity" to "##
2026-06-11 - TUI Keyboard Trap & Options Clarity".