test: migrate test & utils (#14569)

#### PR Dependency Tree


* **PR #14569** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **Chores**
* Upgraded development test tooling to Vitest v4 and added Playwright
browser test integration; normalized test configurations and CI shard
matrix.

* **Tests**
* Added a large suite of new integration tests covering editor flows
(edgeless, database, embeds, images, latex, code, clipboard,
multi-editor, presentation, undo/redo, etc.).
* Removed numerous end-to-end Playwright test suites across the same
feature areas.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/affine/blocks/bookmark/package.json

@@ -31,7 +31,8 @@
     "zod": "^3.25.76"
   },
   "devDependencies": {
-    "vitest": "^3.2.4"
+    "@vitest/browser-playwright": "^4.0.18",
+    "vitest": "^4.0.18"
   },
   "exports": {
     ".": "./src/index.ts",

blocksuite/affine/blocks/bookmark/vitest.config.ts

@@ -1,3 +1,4 @@
+import { playwright } from '@vitest/browser-playwright';
 import { defineConfig } from 'vitest/config';
 
 export default defineConfig({
@@ -8,10 +9,9 @@ export default defineConfig({
     browser: {
       enabled: true,
       headless: true,
-      name: 'chromium',
-      provider: 'playwright',
+      instances: [{ browser: 'chromium' }],
+      provider: playwright(),
       isolate: false,
-      providerOptions: {},
     },
     include: ['src/__tests__/**/*.unit.spec.ts'],
     testTimeout: 500,

blocksuite/affine/blocks/code/src/highlight/affine-code-unit.ts

@@ -45,8 +45,10 @@ export class AffineCodeUnit extends ShadowlessElement {
     if (!codeBlock || !vElement) return plainContent;
     const tokens = codeBlock.highlightTokens$.value;
     if (tokens.length === 0) return plainContent;
+    const line = tokens[vElement.lineIndex];
+    if (!line) return plainContent;
     // copy the tokens to avoid modifying the original tokens
-    const lineTokens = structuredClone(tokens[vElement.lineIndex]);
+    const lineTokens = structuredClone(line);
     if (lineTokens.length === 0) return plainContent;
 
     const startOffset = vElement.startOffset;

blocksuite/affine/blocks/embed-doc/package.json

@@ -35,7 +35,7 @@
     "zod": "^3.25.76"
   },
   "devDependencies": {
-    "vitest": "^3.2.4"
+    "vitest": "^4.0.18"
   },
   "exports": {
     ".": "./src/index.ts",

blocksuite/affine/blocks/embed/package.json

@@ -35,7 +35,7 @@
     "zod": "^3.25.76"
   },
   "devDependencies": {
-    "vitest": "^3.2.4"
+    "vitest": "^4.0.18"
   },
   "exports": {
     ".": "./src/index.ts",

blocksuite/affine/blocks/list/package.json

@@ -31,7 +31,7 @@
     "zod": "^3.25.76"
   },
   "devDependencies": {
-    "vitest": "^3.2.4"
+    "vitest": "^4.0.18"
   },
   "exports": {
     ".": "./src/index.ts",

blocksuite/affine/blocks/surface/package.json

@@ -33,7 +33,7 @@
     "zod": "^3.25.76"
   },
   "devDependencies": {
-    "vitest": "^3.2.4"
+    "vitest": "^4.0.18"
   },
   "exports": {
     ".": "./src/index.ts",