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/tests/app.test.ts

@@ -369,6 +369,7 @@ describe("PDF API", () => {
     const generate = vi.fn(async () => ({
       pdf: Buffer.from("%PDF-test"),
       pageCount: 3,
+      echartsErrors: ["图表 2"],
       mermaidErrors: ["图表 1"],
       timings: {
         queueMs: 0,
@@ -377,6 +378,8 @@ describe("PDF API", () => {
         navigationMs: 3,
         documentRenderMs: 4,
         runtimeSetupMs: 0.1,
+        echartsMs: 0.15,
+        echartsFitMs: 0.18,
         mermaidMs: 0.2,
         mermaidFitMs: 0.3,
         mermaidConversionMs: 0.35,
@@ -415,6 +418,7 @@ describe("PDF API", () => {
       "filename*=UTF-8''%E6%B5%8B%E8%AF%95%E6%96%87%E6%A1%A3.pdf"
     );
     expect(response.headers["x-pdf-page-count"]).toBe("3");
+    expect(response.headers["x-echarts-error-count"]).toBe("1");
     expect(response.headers["x-mermaid-error-count"]).toBe("1");
     expect(response.headers["server-timing"]).toContain(
       "document-render;dur=4.0"
@@ -422,6 +426,9 @@ describe("PDF API", () => {
     expect(response.headers["server-timing"]).toContain(
       "pdf-print;dur=5.0"
     );
+    expect(response.headers["server-timing"]).toContain(
+      "echarts;dur=0.1"
+    );
     expect(response.headers["server-timing"]).toContain(
       "mermaid;dur=0.2"
     );

apps/server/tests/pdf-engine.test.ts

@@ -47,9 +47,12 @@ function fakeBrowser(
     waitForFunction: vi.fn(async () => undefined),
     evaluate: vi.fn(async () => ({
       pageCount: 2,
+      echartsErrors: [],
       mermaidErrors: [],
       timings: {
         setupMs: 1,
+        echartsMs: 1.5,
+        echartsFitMs: 1.75,
         mermaidMs: 2,
         mermaidFitMs: 3,
         mermaidConversionMs: 3.5,
@@ -191,6 +194,8 @@ describe("Playwright PDF 生成器", () => {
         navigationMs: expect.any(Number),
         documentRenderMs: expect.any(Number),
         runtimeSetupMs: 1,
+        echartsMs: 1.5,
+        echartsFitMs: 1.75,
         mermaidMs: 2,
         mermaidFitMs: 3,
         mermaidConversionMs: 3.5,