release: 发布 v0.6.2 DOCX 真实文档修复

新增能力：将 DOCX 发布验收拆分为四套独立 140，支持真实语料冻结、指纹复用、失败与基础设施错误独立统计，并为表格换行、全 JSON 围栏、代码连续性和长文档分页建立通用门禁。

问题修复：冻结 Paged.js 分片前的逻辑表格列轨并传递打印几何，统一 Markdown 表格换行、代码、段落与 OOXML 翻译；改进 PDF 文本流排序、语义块映射、颜色与栅格比较，消除窄字符重叠和跨行范围符号误报。

兼容与部署：版本统一为 0.6.2；正式 Docker 镜像内置固定 Chromium、Pandoc 3.9.0.2 和 Serif/Sans/Mono 字体；Desktop NSIS 与 ZIP 继续直接内置字体，无需系统字体安装。

验证结果：合成基线与长庆严格 280/280，M4N 140/140；健康数据残余误报 6/115（5.22%），均核查为重复表头自动对齐/取样误报且基础设施错误为 0。全项目测试、类型检查、生产构建和 git diff --check 通过；正式 Docker、NSIS、ZIP、离线镜像、部署包、清单及 SHA-256 均已生成并校验。

packages/document-visual-diff/tests/raster.test.ts

@@ -52,6 +52,7 @@ describe("PDF 栅格差异", () => {
       meanAbsoluteError: 0,
       changedPixelRatio: 0,
       inkIou: 1,
+      foregroundInkIou: 1,
       edgeIou: 1,
       backgroundColorDelta: 0,
       foregroundColorDelta: 0,
@@ -88,6 +89,96 @@ describe("PDF 栅格差异", () => {
     expect(sameShape.metrics.foregroundColorDelta).toBeLessThan(1);
   });
 
+  it("双背景占比翻转时仍独立量化核心字形拓扑", async () => {
+    const inlineCodeRaster = (fullHeightShading: boolean) => {
+      const canvas = createCanvas(216, 25);
+      const context = canvas.getContext("2d");
+      context.fillStyle = "#ffffff";
+      context.fillRect(0, 0, 216, 25);
+      context.fillStyle = "#f3f3f3";
+      context.fillRect(28, fullHeightShading ? 0 : 5, 120, fullHeightShading ? 25 : 16);
+      context.fillStyle = "#333333";
+      context.fillRect(34, 10, 80, 4);
+      const png = Uint8Array.from(canvas.toBuffer("image/png"));
+      return {
+        widthPx: 216,
+        heightPx: 25,
+        dpi: 144,
+        sha256: createHash("sha256").update(png).digest("hex"),
+        png,
+      } satisfies PdfPageRaster;
+    };
+    const result = await comparePageRasters(
+      inlineCodeRaster(false),
+      inlineCodeRaster(true),
+    );
+
+    expect(result.metrics.backgroundColorDelta).toBeGreaterThan(10);
+    expect(result.metrics.foregroundInkIou).toBe(1);
+  });
+
+  it("渐变背景不会把深色文字误判为背景", async () => {
+    const gradientRaster = (gradient: boolean) => {
+      const canvas = createCanvas(160, 40);
+      const context = canvas.getContext("2d");
+      if (gradient) {
+        const fill = context.createLinearGradient(0, 0, 160, 0);
+        fill.addColorStop(0, "#edf5fa");
+        fill.addColorStop(1, "#ffffff");
+        context.fillStyle = fill;
+      } else {
+        context.fillStyle = "#f6fafc";
+      }
+      context.fillRect(0, 0, 160, 40);
+      context.fillStyle = "#0b3557";
+      context.fillRect(4, 4, 148, 32);
+      const png = Uint8Array.from(canvas.toBuffer("image/png"));
+      return {
+        widthPx: 160,
+        heightPx: 40,
+        dpi: 144,
+        sha256: createHash("sha256").update(png).digest("hex"),
+        png,
+      } satisfies PdfPageRaster;
+    };
+
+    const result = await comparePageRasters(
+      gradientRaster(true),
+      gradientRaster(false),
+    );
+    expect(result.metrics.foregroundColorDelta).toBeLessThan(1);
+    expect(result.metrics.backgroundColorDelta).toBeLessThan(8);
+    expect(result.metrics.inkIou).toBeGreaterThan(0.95);
+  });
+
+  it("裁剪跨过深色盒边界时不会把外部白色误判为盒背景", async () => {
+    const boxedRaster = (exposeOutside: boolean) => {
+      const canvas = createCanvas(80, 40);
+      const context = canvas.getContext("2d");
+      context.fillStyle = "#ffffff";
+      context.fillRect(0, 0, 80, 40);
+      context.fillStyle = "#464646";
+      context.fillRect(0, 0, exposeOutside ? 68 : 80, exposeOutside ? 32 : 40);
+      context.fillStyle = "#ffffff";
+      context.fillRect(18, 10, 32, 16);
+      const png = Uint8Array.from(canvas.toBuffer("image/png"));
+      return {
+        widthPx: 80,
+        heightPx: 40,
+        dpi: 144,
+        sha256: createHash("sha256").update(png).digest("hex"),
+        png,
+      } satisfies PdfPageRaster;
+    };
+
+    const result = await comparePageRasters(
+      boxedRaster(true),
+      boxedRaster(false),
+    );
+    expect(result.metrics.backgroundColorDelta).toBeLessThan(1);
+    expect(result.metrics.foregroundColorDelta).toBeLessThan(1);
+  });
+
   it("量化位移并生成稳定叠加图与热力图", async () => {
     const result = await comparePageRasters(raster(10), raster(20), {
       spatialTolerancePx: 0,