Add custom keyboard extension for code input

[BillSteinUNB]

Summary

Create a custom keyboard extension optimized for coding with frequently-used symbols, making code input faster and more comfortable on mobile.

Context

Coding on mobile is challenging with a standard keyboard - constantly switching between letters and symbols (brackets, operators, etc.) slows down development. A custom keyboard tailored for code would significantly improve the mobile coding experience.

Proposed Features

1. Code-Focused Key Layout

Custom rows with common coding symbols:

• Programming brackets: ( ) [ ] { } < >
• Operators: = + - * / % & | ! ?
• Punctuation: : ; , . " ' \ ~ ^`
• Common pairs: => -> === !== <= >=
• Quick access to: / * # @ $ _

2. Smart Features

• Swipe gestures for common operations (delete word, capitalize, etc.)
• Long-press for alternate characters (e.g., long-press " for ")
• Number row toggle for quick digit access
• Tab key for indentation
• Auto-pairs for brackets and quotes

3. Language-Specific Layouts

• Default (general programming)
• Python-focused (colon, indentation-friendly)
• JavaScript/TypeScript (arrow functions, template strings)

4. Integration

• Works across the system (not just in WhisperCode)
• Sync preferences with main app
• Haptic feedback on key press

Technical Considerations

• Use iOS Keyboard Extension API
• Request "Full Access" for advanced features
• Handle memory constraints of extensions
• Support both light and dark modes

User Experience

The keyboard should feel fast and native:

• Minimal latency on key press
• Visual feedback for all inputs
• Smooth animations
• Responsive to different screen sizes

Alternative Approach

Instead of a full keyboard extension, consider:

• An in-app custom input view/overlay
• Custom toolbar with quick-insert buttons

Labels

• enhancement
• ios-specific
• developer-experience