Feature request: Pause/resume for ongoing runs

It would be useful to have a pause button in the chat interface (both CLI and VS Code extension) that freezes an ongoing run and lets you resume it later from where it left off.

Current options (Ctrl+C, typing to interrupt) all stop or redirect execution. There's no way to temporarily freeze a run (e.g., to review intermediate output, check a file, or just step away) without losing progress.

Proposed behavior:

• A keyboard shortcut or UI button that pauses the current run mid-execution
• The run holds its place (queued tool calls, current context)
• A second press or "resume" action continues from exactly where it stopped

Use case: Long multi-step runs where you want to review what's happening before it continues, without having to restart or re-prompt.