Add terminal copy/paste and right-click context menu

[coneilen]

Summary

• Expose Electron clipboard API (writeText/readText) via the preload bridge so the renderer can access the system clipboard
• Add keyboard shortcuts in xterm.js custom key handler: Ctrl+Shift+C (copy selection), Ctrl+Shift+V (paste), Ctrl+Shift+A (select all)
• Introduce TerminalContextMenu.svelte — a positioned dropdown on right-click with Copy, Paste, Select All, and Clear Terminal actions
• Wire the context menu into Terminal.svelte with proper open/close lifecycle (Escape, click outside, item click)
• Copy is disabled (greyed out) when no text is selected

Files changed

File	Change
src/preload/index.ts	Import clipboard from electron, add clipboard to Api interface and implementation
src/renderer/env.d.ts	Add clipboard types to renderer Api interface
src/renderer/lib/utils/terminal.ts	Add Ctrl+Shift+C/V/A keyboard shortcuts
src/renderer/lib/components/TerminalContextMenu.svelte	New — context menu component
src/renderer/lib/components/Terminal.svelte	Wire context menu, handle actions

Test plan

• Mouse-select text in terminal → highlighted with selection colors
• Ctrl+Shift+C copies selected text to system clipboard
• Ctrl+Shift+V pastes system clipboard into terminal session
• Ctrl+Shift+A selects all terminal content
• Right-click opens context menu at cursor position
• Context menu Copy/Paste/Select All/Clear all function correctly
• Context menu closes on Escape, click outside, or any item click
• Copy item is greyed out and disabled when no text is selected
• Menu repositions when it would overflow the viewport

🤖 Generated with Claude Code