feat: improve test & bundler (#14434)

#### PR Dependency Tree


* **PR #14434** 👈

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

* **New Features**
* Introduced rspack bundler as an alternative to webpack for optimized
builds.

* **Tests & Quality**
* Added comprehensive editor semantic tests covering markdown, hotkeys,
and slash-menu operations.
* Expanded CI cross-browser testing to Chromium, Firefox, and WebKit;
improved shape-rendering tests to account for zoom.

* **Bug Fixes**
  * Corrected CSS overlay styling for development servers.
  * Fixed TypeScript typings for build tooling.

* **Other**
  * Document duplication now produces consistent "(n)" suffixes.
  * French i18n completeness increased to 100%.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

.github/workflows/build-test.yml

@@ -210,18 +210,13 @@ jobs:
   e2e-blocksuite-cross-browser-test:
     name: E2E BlockSuite Cross Browser Test
     runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        shard: [1]
-        browser: ['chromium', 'firefox', 'webkit']
     steps:
       - uses: actions/checkout@v4
       - name: Setup Node.js
         uses: ./.github/actions/setup-node
         with:
           playwright-install: true
-          playwright-platform: ${{ matrix.browser }}
+          playwright-platform: 'chromium,firefox,webkit'
           electron-install: false
           full-cache: true
 
@@ -229,18 +224,64 @@ jobs:
         run: yarn workspace @blocksuite/playground build
 
       - name: Run playwright tests
-        env:
-          BROWSER: ${{ matrix.browser }}
-        run: yarn workspace @affine-test/blocksuite test "cross-platform/" --forbid-only --shard=${{ matrix.shard }}/${{ strategy.job-total }}
+        run: |
+          yarn workspace @blocksuite/integration-test test:unit
+          yarn workspace @affine-test/blocksuite test "cross-platform/" --forbid-only
 
       - name: Upload test results
         if: always()
         uses: actions/upload-artifact@v4
         with:
-          name: test-results-e2e-bs-cross-browser-${{ matrix.browser }}-${{ matrix.shard }}
+          name: test-results-e2e-bs-cross-browser
           path: ./test-results
           if-no-files-found: ignore
 
+  bundler-matrix:
+    name: Bundler Matrix (${{ matrix.bundler }})
+    runs-on: ubuntu-24.04-arm
+    strategy:
+      fail-fast: false
+      matrix:
+        bundler: [webpack, rspack]
+    steps:
+      - uses: actions/checkout@v4
+      - name: Setup Node.js
+        uses: ./.github/actions/setup-node
+        with:
+          playwright-install: false
+          electron-install: false
+          full-cache: true
+
+      - name: Run frontend build matrix
+        env:
+          AFFINE_BUNDLER: ${{ matrix.bundler }}
+        run: |
+          set -euo pipefail
+          packages=(
+            "@affine/web"
+            "@affine/mobile"
+            "@affine/ios"
+            "@affine/android"
+            "@affine/admin"
+            "@affine/electron-renderer"
+          )
+          summary="test-results-bundler-${AFFINE_BUNDLER}.txt"
+          : > "$summary"
+          for pkg in "${packages[@]}"; do
+            start=$(date +%s)
+            yarn affine "$pkg" build
+            end=$(date +%s)
+            echo "${pkg},$((end-start))" >> "$summary"
+          done
+
+      - name: Upload bundler timing
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: test-results-bundler-${{ matrix.bundler }}
+          path: ./test-results-bundler-${{ matrix.bundler }}.txt
+          if-no-files-found: ignore
+
   e2e-test:
     name: E2E Test
     runs-on: ubuntu-24.04-arm
@@ -321,6 +362,7 @@ jobs:
         with:
           electron-install: true
           playwright-install: true
+          playwright-platform: 'chromium,firefox,webkit'
           full-cache: true
 
       - name: Download affine.linux-x64-gnu.node