Support clipboard image paste in terminal CLI

Feature Request

Is your feature request related to a problem?

I cannot paste images from clipboard into Claude Code CLI (Windows Terminal). When I copy a screenshot with Win+Shift+S or copy an image from a browser, there's no way to paste it into the Claude Code terminal session.

Other terminal-based AI tools (e.g., Gemini CLI) support clipboard image paste in the same terminal environment, so this is not a terminal emulator limitation.

Describe the solution you'd like

Support pasting images from the system clipboard directly into the Claude Code CLI input, similar to how Gemini CLI handles it. The image should be sent as part of the conversation context so Claude can analyze it.

Describe alternatives you've considered

• Saving screenshots to a file and referencing the path (works but adds friction)
• Using claude.ai/code web app (supports paste but loses CLI workflow)
• Using the Claude Code desktop app with drag-and-drop

These all work but break the flow compared to a direct clipboard paste.

Environment

• Claude Code v2.1.92
• Windows 11 Pro, Windows Terminal
• Also relevant for macOS/Linux terminal users

Additional context

This is especially useful for multi-monitor setups where you want to quickly share a screenshot of an error, UI state, or reference material without leaving the terminal.