openclaw - 💡(How to fix) Fix feishu: add IM file upload tool for sending local files

Problem

feishu_im_user_message supports msg_type: "file", but the content JSON {"file_key":"xxx"} requires a file_key from Feishu IM upload API POST /open-apis/im/v1/files.

Currently no tool exposes this endpoint:

• feishu_drive_file.upload → drive file_key (not usable for IM messages)
• feishu_doc_media.insert → doc file_token (not usable for IM messages)

Result: cannot send local files to Feishu chat via feishu_im_user_message.

Proposed Solution

New tool feishu_im_file with action upload, calling POST /open-apis/im/v1/files, accepting file_path (local path), returning file_key.

Flow:

1. feishu_im_file.upload → get file_key
2. feishu_im_user_message.send with {"file_key":"xxx"} → file in chat

Use Case

Cron jobs generate PDF reports and need to push them directly as files to user Feishu DMs. Currently requires workaround with doc attachments or drive links.