Clipboard image paste doesn't work on WSL (Windows Terminal intercepts Ctrl+V) #2

Problem

When running OpenCode in WSL via Windows Terminal, pasting images from the clipboard with Ctrl+V doesn't work due to three compounding issues:

1. Windows Terminal intercepts Ctrl+V at the emulator level before it reaches the app's stdin. When the clipboard contains only an image (no text), WT has nothing to paste and sends zero bytes — no event fires at all.
2. WSLg clipboard bridge returns BMP format (not PNG/JPEG), which the LLM API rejects with: media_type: Input should be 'image/jpeg', 'image/png', 'image/gif' or 'image/webp'
3. wl-paste needs XDG_RUNTIME_DIR=/mnt/wslg/runtime-dir on WSLg to access the Wayland clipboard socket, not the default /run/user/0/.

Steps to Reproduce

1. Run OpenCode in WSL2 via Windows Terminal
2. Copy an image to the Windows clipboard (e.g., Win+Shift+S screenshot)
3. Press Ctrl+V in the OpenCode prompt
4. Nothing happens

Expected Behavior

The image should be pasted into the prompt as an attachment.

Environment

• WSL2 on Windows with WSLg
• Windows Terminal (does not implement Kitty keyboard protocol)
• wl-clipboard package installed (wl-paste available)