docs: mention clipboard image footer hint in interaction guide

docs/en/guides/interaction.md

@@ -21,6 +21,8 @@ How to paste:
 
 After pasting, the input box shows a placeholder that you can edit like normal text; on submit, the placeholder is replaced with the actual content. A plain-text clipboard falls back to ordinary paste. Media support depends on the current model's multimodal capabilities (`image_in` / `video_in`); it is enabled by default when you are logged in to a Kimi Code account.
 
+When an image is on the clipboard and the terminal regains focus, the footer shows a transient hint with the correct shortcut for your platform.
+
 ## Slash commands
 
 Anything starting with `/` is treated as a slash command. Typing `/` opens a completion menu that filters in real time as you keep typing; press `Esc` to close the menu. If nothing matches, the input is sent to the agent as a regular message.

docs/zh/guides/interaction.md

@@ -21,6 +21,8 @@ Kimi Code CLI 支持在输入框中直接粘贴图片和视频，让 AI 结合
 
 粘贴后输入框显示占位符，可像普通文本一样编辑；提交时自动替换为实际内容。纯文本剪贴板会回退到普通粘贴。媒体功能是否可用取决于当前模型的多模态能力（`image_in` / `video_in`），登录 Kimi Code 账号后默认开启。
 
+当剪贴板中有图片且终端重新获得焦点时，footer 会显示一个临时提示，告诉你当前平台的正确粘贴快捷键。
+
 ## 斜杠命令
 
 以 `/` 开头的内容会被识别为斜杠命令。输入 `/` 后弹出补全菜单，随后续字符实时过滤；按 `Esc` 关闭菜单，匹配失败时内容会作为普通消息发送给 Agent。