prompt-enhancement 4

Prompt enhancement for the dsh web GUI: rewrite the composer draft into a well-structured prompt through the harness LLM service, preview the before/after, then fill back, copy, or undo. Original draft is always preserved.

一键把输入框草稿改写为更清晰、更贴 Agent 执行的提示词：直接替换 + 一键撤回，带保真闸与长度闸。

Rewrite the composer draft into a clearer, agent-ready prompt in one click, with Revert and Retry. 一键把输入框草稿改写为更清晰、更贴 Agent 执行的提示词。

Four-tier prompt enhancement for the dsh web GUI: base / standard / professional / system. Rewrites the composer draft through the harness LLM service, previews or fills back in place, and always keeps the original draft recoverable.