wwu328763-netizen/dsh-billing-compass

Composer-dock billing panel: DeepSeek account balance, official per-model usage and spend with cost per 100M tokens, plus cost estimates for this run and the whole conversation. Clicking opens a popover that matches the composer's width and position; balance comes from /user/balance, usage and spend from platform's usage endpoints, and the whole-conversation total is folded read-only from the local session log. Zero dependencies (node:https + node:zlib), writes nothing to disk.