Improve clipboard handling for code

[BillSteinUNB]

Summary

Improve clipboard handling specifically for code - better paste behavior, smart formatting, and enhanced copy functionality tailored for developers.

Context

Mobile coding requires frequent copy/paste operations, but standard clipboard behavior doesn't work well for code. Improved clipboard handling would make these operations faster and more reliable.

Problems to Solve

1. Paste Issues

   • Indentation often gets stripped or corrupted
   • Multi-line paste doesn't preserve structure
   • Trailing whitespace problems
   • Auto-formatting that breaks code

2. Copy Issues

   • Hard to select code accurately on mobile
   • No easy way to copy just a function/class
   • Line numbers sometimes included accidentally

3. Integration

   • Clipboard from other apps may need adjustment
   • Different paste behavior for different contexts

Proposed Features

1. Smart Paste

• Preserve indentation when pasting into code blocks
• Detect code vs prose and adjust behavior accordingly
• Strip trailing whitespace automatically (configurable)
• Trim leading blank lines before insert point
• Maintain relative indentation when pasting nested code

2. Enhanced Copy

• Select-by-block - tap to select function, class, or logical block
• Copy with/without surrounding context (just selection vs including indentation)
• Smart selection - double-tap to select word, triple-tap for line
• Copy formatted - option to copy as markdown code block

3. Multi-Content Paste

When pasting content that could be interpreted multiple ways:

• Show a brief picker: "Insert as Code" / "Insert as Text"
• Remember preference for similar content

4. Code-Specific Actions

• Paste and indent - paste and auto-indent for current context
• Paste as comment - paste with comment prefix
• Paste into terminal - execute pasted command (with confirmation)

Technical Considerations

• Use iOS text input system properly
• Work with the existing editor (likely Monaco or CodeMirror)
• Handle various paste sources gracefully

Alternative

Consider adding a dedicated "code paste" button in the input area that applies code-specific paste behavior.

Labels

• enhancement
• developer-experience