dsh-tool-emoji: A DeepSeek Harness Web Plugin That Replaces Tool Card Leading Icons with Emojis

`dsh-tool-emoji` is a plugin for the DeepSeek Harness Web profile that replaces SVG icons in tool call cards with emojis. Implemented through a global stylesheet, it preserves the original card content, supports custom emojis or uploaded images (up to 1 MB), and is compatible with `dsh-edit-guardian`. It applies only to the Web profile, does not support hot reloading, and requires a restart to take effect.