chore: sync marketing pages, CMS extensions, tests and project docs

同步工作区剩余变更，主要包括：
- 营销页面组件与布局持续优化（about/news/services/solutions/team 等）
- 详情页四层叙事组件、布局组件、UI 组件调整
- CMS 数据模型、API 路由、权限、工作流、站内通知、媒体管理扩展
- 新增/补充单元测试与 E2E 测试（cms-workflow.spec.ts 等）
- ESLint 9 迁移、jest/tsconfig 配置更新、依赖调整
- 新增 ADR、CMS 评估文档、Release Review / Acceptance 报告
- 移除水墨装饰组件与大体积未使用字体文件

src/lib/media/image-processor.test.ts

@@ -0,0 +1,106 @@
+import { describe, it, expect, beforeAll } from '@jest/globals';
+import sharp from 'sharp';
+import {
+  isImage,
+  getImageMetadata,
+  generateDerivatives,
+  THUMBNAIL_SIZE,
+} from './image-processor';
+
+describe('image-processor', () => {
+  let testPng: Buffer;
+  let testJpeg: Buffer;
+  const txtBuffer = Buffer.from('not an image');
+
+  beforeAll(async () => {
+    testPng = await sharp({
+      create: {
+        width: 800,
+        height: 600,
+        channels: 3,
+        background: { r: 255, g: 0, b: 0 },
+      },
+    })
+      .png()
+      .toBuffer();
+
+    testJpeg = await sharp({
+      create: {
+        width: 400,
+        height: 300,
+        channels: 3,
+        background: { r: 0, g: 0, b: 255 },
+      },
+    })
+      .jpeg()
+      .toBuffer();
+  });
+
+  describe('isImage', () => {
+    it('returns true for common image mime types', () => {
+      expect(isImage('image/png')).toBe(true);
+      expect(isImage('image/jpeg')).toBe(true);
+      expect(isImage('image/webp')).toBe(true);
+      expect(isImage('image/avif')).toBe(true);
+      expect(isImage('image/gif')).toBe(true);
+    });
+
+    it('returns false for non-image mime types', () => {
+      expect(isImage('application/pdf')).toBe(false);
+      expect(isImage('text/plain')).toBe(false);
+      expect(isImage('video/mp4')).toBe(false);
+    });
+  });
+
+  describe('getImageMetadata', () => {
+    it('returns width and height for a valid image buffer', async () => {
+      const meta = await getImageMetadata(testPng);
+      expect(meta).toEqual({ width: 800, height: 600 });
+    });
+
+    it('returns null for non-image buffer', async () => {
+      const meta = await getImageMetadata(txtBuffer);
+      expect(meta).toBeNull();
+    });
+  });
+
+  describe('generateDerivatives', () => {
+    it('generates thumbnail, webp and avif for image/png', async () => {
+      const derivatives = await generateDerivatives(testPng, 'image/png');
+
+      expect(derivatives.thumbnail).toBeDefined();
+      expect(derivatives.webp).toBeDefined();
+      expect(derivatives.avif).toBeDefined();
+
+      expect(derivatives.thumbnail!.width).toBeLessThanOrEqual(THUMBNAIL_SIZE);
+      expect(derivatives.thumbnail!.height).toBeLessThanOrEqual(THUMBNAIL_SIZE);
+      expect(derivatives.thumbnail!.path).toMatch(/-thumbnail\./);
+      expect(derivatives.thumbnail!.url).toMatch(/-thumbnail\./);
+
+      expect(derivatives.webp!.path).toMatch(/\.webp$/);
+      expect(derivatives.webp!.url).toMatch(/\.webp$/);
+
+      expect(derivatives.avif!.path).toMatch(/\.avif$/);
+      expect(derivatives.avif!.url).toMatch(/\.avif$/);
+    });
+
+    it('keeps original aspect ratio for thumbnail', async () => {
+      const derivatives = await generateDerivatives(testPng, 'image/png');
+      const thumb = derivatives.thumbnail!;
+      expect(thumb.width / thumb.height).toBeCloseTo(800 / 600, 1);
+    });
+
+    it('returns empty derivatives for non-image files', async () => {
+      const derivatives = await generateDerivatives(txtBuffer, 'text/plain');
+      expect(Object.keys(derivatives)).toHaveLength(0);
+    });
+
+    it('generates webp/avif with same dimensions as original', async () => {
+      const derivatives = await generateDerivatives(testJpeg, 'image/jpeg');
+      expect(derivatives.webp!.width).toBe(400);
+      expect(derivatives.webp!.height).toBe(300);
+      expect(derivatives.avif!.width).toBe(400);
+      expect(derivatives.avif!.height).toBe(300);
+    });
+  });
+});