dsh-session-cost: Display Real-Time Session Cost Estimation at the Bottom of the DSH Web GUI

dsh-session-cost is a DSH plugin that displays real-time cost estimates for DeepSeek API usage in the current session via a bottom status bar in the Web GUI. Maintained by ChengChe106 and released under the MIT license, its core features include displaying four cost figures—cost, hits, misses, and output—by reading token usage data from DSH sessions and calculating according to the official billing methodology (cache writes are billed at the miss unit price). The plugin supports automatic peak/off-peak pricing starting from August 17, 2026, defaults to the deepseek-v4-flash model, and uses the "≈" symbol to indicate that amounts are estimates. Typography and color schemes follow official specifications to achieve theme adaptation. There are two installation methods: if dsh is globally installed, run `dsh plu