Image paste (Ctrl-V) does not work in Ghostty terminal on macOS

Description

Image paste via Ctrl-V does not work in Ghostty terminal on macOS. The feature is documented (clipboard-image-hint.ts shows "Image in clipboard — Ctrl+V to paste"), but pressing Ctrl-V after copying an image to the clipboard does nothing.

Additionally, drag-and-drop is not supported in TUI mode, which is expected for a terminal app. However, Claude Code (same Ink-based TUI framework) supports Ctrl-V image paste reliably in the same terminal.

Environment

• kimi-code: 0.31.1
• OS: macOS 15.5 (Darwin 25.5.0, arm64)
• Terminal: Ghostty (xterm-ghostty)
• Model: K3 with image_in capability enabled

Steps to Reproduce

1. Copy an image to clipboard (Cmd-C on a file in Finder, or screenshot with Cmd-Shift-4)
2. Switch to kimi-code TUI in Ghostty
3. Press Ctrl-V
4. Nothing happens — no hint appears, no image is pasted

Expected Behavior

• A hint "Image in clipboard — Ctrl+V to paste" should appear
• Pressing Ctrl-V should attach the image to the next message
• This works correctly in Claude Code with the same terminal setup

Workaround

We implemented a hook-based workaround: user types "看图" (Chinese for "look at image"), the hook extracts the clipboard image via pngpaste/osascript, saves it to a temp file, and injects the path for ReadMediaFile. But this should not be necessary.

Start with clipboard-image-hint.ts, which documents the expected Ctrl-V behavior, then trace the TUI input path for image clipboard handling on macOS. Reproduce the issue in Ghostty with an image on the clipboard and verify that the hint appears and the image is attached to the next message without the workaround.