feat(cli): support @-mentioning files in AskUser custom input

[Adib234]

Summary

Enable users to reference specific files using @ mentioning within the AskUserDialog's text inputs (both for text-type questions and the custom "Other" option in choice questions).

Details

• Created a reusable AutocompleteTextInput component that wraps TextInput and provides @ completion capabilities.
• Integrated useCommandCompletion and SuggestionsDisplay to provide the same file-search experience available in the main prompt.
• Updated AskUserDialog.tsx to use AutocompleteTextInput instead of the standard TextInput.
• Added eslint suppression for a mock CommandContext required by the completion hook.

Related Issues

Fixes #18495

How to Validate

1. Run the CLI and trigger an interaction that uses AskUser with a text input (e.g., providing feedback on a plan).
2. Type @ followed by a partial path.
3. Verify that the file suggestions list appears.
4. Use arrow keys to navigate and Tab or Enter to select a file.

Pre-Merge Checklist

• Updated relevant documentation and README (if needed)
• Added/updated tests (if needed)
• Noted breaking changes (if any)
• Validated on required platforms/methods:
  • MacOS
    • npm run

[github-actions]

Size Change: +3.05 kB (+0.01%)

Total Size: 34 MB

Filename	Size	Change
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./bundle/oauth2-provider-VYDJHGYV.js	9.16 kB	+9.16 kB (new file)	🆕

ℹ️ View Unchanged

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[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the CLI user experience by enabling file referencing through @-mentioning within AskUserDialog inputs. By creating a new AutocompleteTextInput component, the changes provide a consistent and intuitive way for users to select files directly within text prompts, improving workflow efficiency and usability.

Highlights

• New Autocomplete Component: Introduced a reusable AutocompleteTextInput component that wraps the standard TextInput to provide file-mentioning capabilities via @.
• Enhanced AskUser Dialog: Updated AskUserDialog.tsx to utilize the new AutocompleteTextInput for both standard text questions and custom input options.
• Integration: Integrated useCommandCompletion and SuggestionsDisplay to ensure a consistent file-search experience across the CLI.

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[gemini-code-assist]

Code Review

This pull request introduces the AutocompleteTextInput component to provide file-path suggestions in the CLI's dialog views, replacing the standard TextInput in AskUserDialog. The feedback highlights that the package-lock.json contains numerous unintended dependency changes that should be reverted. Additionally, the AutocompleteTextInput component uses an unsafe type assertion for CommandContext which could lead to runtime errors, and the suggestion display mode should be dynamically adjusted based on its position (above vs. below) to ensure a correct user experience.