feat: DeepSeek usage panel — balance, per-request cost, daily history#163

rbinar wants to merge 9 commits into

Vizards:mainVizards/deepseek-v4-for-copilot:mainfrom

rbinar:fix/remove-vscode-internals-keep-panelrbinar/deepseek-v4-for-copilot:fix/remove-vscode-internals-keep-panelCopy head branch name to clipboard