Make Clear of Peak-Valley Prices of DeepSeek API on DSH Top Bar with dsh-client-pricing

`dsh-client-pricing` is a DSH Web client plugin maintained by Miyazawai, which displays the current unit prices of the DeepSeek API in the session top bar: with peak/idle badges, automatic price switching between flash and pro plans, and recalculating the price tier every 30 seconds. This article verifies the installation command, price list and capability boundaries based on the community directory, GitHub README and official pricing page. The prices are hard-coded and no session billing is provided.