feat: 增加 ECharts 渲染与预览交互增强

- 新增可复用的 markdown-echarts 工作区，支持安全的 YAML 围栏、默认值、语义校验、错误占位和 SVG 渲染
- 将 ECharts 接入统一 Markdown、快速预览、精确预览与 PDF 链路，并复用 Mermaid 的不可跨页和超高图单页适配策略
- 默认示例加入 ECharts，增加源文本折叠、顶部文档状态、页码输入跳转与滚动同步
- 快速预览改用外层容器滚动，使滚动条与精确预览统一贴在预览区域右侧，并兼容显示缩放
- 完善 Docker 工作区复制、可配置 Compose 镜像、测试覆盖和进度文档

apps/server/src/app.ts

@@ -149,6 +149,8 @@ function createPdfServerTiming(
     `navigation;dur=${milliseconds(timings.navigationMs)}`,
     `document-render;dur=${milliseconds(timings.documentRenderMs)}`,
     `runtime-setup;dur=${milliseconds(timings.runtimeSetupMs)}`,
+    `echarts;dur=${milliseconds(timings.echartsMs)}`,
+    `echarts-fit;dur=${milliseconds(timings.echartsFitMs)}`,
     `mermaid;dur=${milliseconds(timings.mermaidMs)}`,
     `mermaid-fit;dur=${milliseconds(timings.mermaidFitMs)}`,
     `mermaid-conversion;dur=${milliseconds(
@@ -397,6 +399,10 @@ export function buildApp(options: BuildAppOptions = {}) {
           .header("cache-control", "no-store")
           .header("server-timing", serverTiming)
           .header("x-pdf-page-count", String(generated.pageCount))
+          .header(
+            "x-echarts-error-count",
+            String(generated.echartsErrors.length)
+          )
           .header(
             "x-mermaid-error-count",
             String(generated.mermaidErrors.length)

apps/server/src/pdf-engine.ts

@@ -10,6 +10,7 @@ export type PdfRenderPayload = PagedDocumentPayload;
 export interface PdfGenerationResult {
   pdf: Buffer;
   pageCount: number;
+  echartsErrors: string[];
   mermaidErrors: string[];
   timings: PdfGenerationTimings;
 }
@@ -21,6 +22,8 @@ export interface PdfGenerationTimings {
   navigationMs: number;
   documentRenderMs: number;
   runtimeSetupMs: number;
+  echartsMs: number;
+  echartsFitMs: number;
   mermaidMs: number;
   mermaidFitMs: number;
   mermaidConversionMs: number;
@@ -59,6 +62,8 @@ interface PdfDocumentResult
     | "navigationMs"
     | "documentRenderMs"
     | "runtimeSetupMs"
+    | "echartsMs"
+    | "echartsFitMs"
     | "mermaidMs"
     | "mermaidFitMs"
     | "mermaidConversionMs"
@@ -469,11 +474,14 @@ export class PlaywrightPdfGenerator implements PdfGenerator {
     return {
       pdf,
       pageCount: renderResult.pageCount,
+      echartsErrors: renderResult.echartsErrors,
       mermaidErrors: renderResult.mermaidErrors,
       timings: {
         navigationMs,
         documentRenderMs,
         runtimeSetupMs: renderResult.timings.setupMs,
+        echartsMs: renderResult.timings.echartsMs,
+        echartsFitMs: renderResult.timings.echartsFitMs,
         mermaidMs: renderResult.timings.mermaidMs,
         mermaidFitMs: renderResult.timings.mermaidFitMs,
         mermaidConversionMs: