headquarter/openspec/changes/fix-web-terminal-clipboard/change.md

Fix Web Terminal Clipboard

Problem

Users cannot reliably copy terminal output from the browser terminal. Browser copy shortcuts may be forwarded to the terminal as input instead of copying the xterm selection, and paste behavior differs by bracketed-paste mode.

Required behavior

• Right-clicking a selected terminal region presents an xterm-aware Copy action that writes the selection to the system clipboard.
• Browser native context menus remain available when no terminal output is selected.
• Terminal keyboard input, including Ctrl+C, remains unchanged.
• Copy requests expose the xterm selection as plain text.
• Pasting plain text is handled once and follows bracketed-paste mode when enabled.
• Normal terminal interrupts still work when there is no active selection.