Feature Request: Silent/background mode for cookie strategy — don't interrupt active browser tab

[fudujiji]

Problem

When running commands like opencli twitter timeline, the Browser Bridge
causes visible tab switching or page navigation, interrupting the user's
current browsing session.

Expected Behavior

For cookie strategy commands, OpenCLI should be able to fetch data
silently in the background without taking focus away from the user's
active tab.

Suggested Solution

• Add a --silent or --background flag
• Or support a dedicated background tab that never takes focus
• Headless operation option for cookie/intercept strategies

Use Case

Running OpenCLI as part of an AI agent workflow (e.g., Claude Code)
where commands are triggered automatically — interrupting the browser
is disruptive and breaks the user experience.

[Astro-Han]

#684 It is discussed in this issue.