fix(dashboard): 修复图表 Legend 图标显示不一致并提升文字渲染清晰度#168
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- COMMON_LEGEND 增加 boxHeight 约束防止椭圆，移除冗余 pointStyleWidth - 模型 Token 图 generateLabels 显式重置圆点属性防 right 布局覆盖 - 新增 isValidLabel 工具函数过滤 undefined/null 等无效 vendor 数据 - CSS 添加 antialiased 字体平滑及中文字体回退链优化 Retina 清晰度 🤖 Generated with [Claude Code](https://github.com/claude), [CodeX](https://openai.com), [Gemini](https://github.com/apps/gemini-code-assist) Co-Authored-By: Aurelius Huang<threefish.ai@gmail.com>
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Summary
修复 Dashboard 页面图表 Legend 图标的三个显示问题，并提升整体文字渲染清晰度。
修复的问题
Legend 图标不一致 — 应统一显示实心圆，但部分图表显示为空心圆或椭圆
boxWidth未设置boxHeight，Chart.js 在right布局下将圆点拉伸为椭圆；冗余的pointStyleWidth参数干扰布局引擎COMMON_LEGEND增加boxHeight: 10正方形约束，移除pointStyleWidth供应商分布图出现 "undefined" 图例项 — 历史数据中存在无效 vendor 值未被过滤
if (!v)仅过滤 falsy 值，字符串"undefined"/"null"可通过isValidLabel()工具函数（含typeof类型检查），四处 chart builder 统一应用文字渲染模糊 — macOS 深色背景下默认 subpixel antialiasing 导致色散
antialiased字体平滑 +optimizeLegibilityPingFang SC/Microsoft YaHei中文字体devicePixelRatio确保 Retina 屏清晰渲染技术决策
经评估 Chart.js vs ECharts vs ApexCharts，确认所有问题均可在 Chart.js 内通过定向修复解决，无需迁移图表库（遵循最小干预原则）。
变更文件
src/coding/proxy/server/dashboard.py— 唯一修改文件（+18 / -7）Test plan
/dashboard页面，检查四个图表的 Legend 图标均显示为实心圆🤖 Generated with Claude Code, CodeX, Gemini
Co-Authored-By: Aurelius Huangthreefish.ai@gmail.com