TLDR

Adds keyboard shortcuts (Meta+Enter on macOS, Ctrl+Enter on all platforms) to execute shell commands directly from the input prompt without entering shell mode.

Dive Deeper

Previously, users who wanted to run a shell command had to either:

1. Toggle into shell mode with !, execute the command, then toggle back
2. Use natural language to describe what command they want to run, which unnecessarily invokes the LLM (inefficient and slower)

This change adds a third option: pressing Meta+Enter (macOS) or Ctrl+Enter (all platforms) executes the current input text as a shell command without switching modes.

Implementation details:

• Added EXECUTE_PROMPT_COMMAND to the command enum in key bindings
• Configured key bindings for Meta+Enter (macOS) and Ctrl+Enter (all platforms)
• Reuses existing handleShellCommand infrastructure from shell mode
• Empty buffer handling prevents newline insertion
• Commands support proper abort handling via AbortController
• Updated help text to document the new shortcuts

Reviewer Test Plan

1. Run the CLI with the changes
2. Type a shell command in the prompt (e.g., ls -la)
3. Press Meta+Enter (macOS) or Ctrl+Enter (other platforms)
   • Note for macOS testers: You can use Ctrl+Enter on macOS as well. If that doesn't work, try Option+Enter (since some terminals report Option as Meta instead of Cmd)
4. Verify the command executes without entering shell mode
5. Test with empty buffer to ensure no-op behavior
6. Test command abortion with Ctrl+C

Testing Matrix

Linked issues / bugs

Fixes google-gemini#10130