diff --git a/package.json b/package.json
index 7a2f9bdd7c..3b55aa3ba0 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
     "test:superdoc": "vitest run --root ./packages/superdoc",
     "test:cov": "node scripts/test-cov.mjs",
     "type-check": "tsc -b --force tsconfig.references.json",
-    "rebuild:types": "pnpm run --filter=@superdoc/contracts --filter=@superdoc/geometry-utils --filter=@superdoc/style-engine --filter=@superdoc/pm-adapter --filter=@superdoc/measuring-dom --filter=@superdoc/layout-engine --filter=@superdoc/painter-dom --filter=@superdoc/layout-bridge build",
+    "rebuild:types": "pnpm run --filter=@superdoc/common --filter=@superdoc/word-layout --filter=@superdoc/contracts --filter=@superdoc/geometry-utils --filter=@superdoc/style-engine --filter=@superdoc/pm-adapter --filter=@superdoc/measuring-dom --filter=@superdoc/layout-engine --filter=@superdoc/painter-dom --filter=@superdoc/layout-bridge build",
     "validate:commands": "node scripts/validate-command-types.mjs",
     "unzip": "bash packages/super-editor/src/tests/helpers/unzip.sh",
     "dev": "pnpm --prefix packages/superdoc run dev",
diff --git a/packages/layout-engine/measuring/dom/src/index.ts b/packages/layout-engine/measuring/dom/src/index.ts
index c144d8e498..83d131bacf 100644
--- a/packages/layout-engine/measuring/dom/src/index.ts
+++ b/packages/layout-engine/measuring/dom/src/index.ts
@@ -70,7 +70,7 @@ import {
   DEFAULT_LIST_HANGING_PX as DEFAULT_LIST_HANGING,
   SPACE_SUFFIX_GAP_PX,
 } from '@superdoc/common/layout-constants';
-import { resolveListTextStartPx } from '@superdoc/common/list-marker-utils';
+import { resolveListTextStartPx, type MinimalMarker } from '@superdoc/common/list-marker-utils';
 import { calculateRotatedBounds, normalizeRotation } from '@superdoc/geometry-utils';
 import { toCssFontFamily } from '@superdoc/font-utils';
 export { installNodeCanvasPolyfill } from './setup.js';
@@ -895,7 +895,7 @@ async function measureParagraphBlock(block: ParagraphBlock, maxWidth: number): P
     indentLeft,
     firstLine,
     hanging,
-    (markerText, marker) => {
+    (markerText: string, marker: MinimalMarker) => {
       const markerRun = {
         fontFamily: toCssFontFamily(marker.run?.fontFamily) ?? marker.run?.fontFamily ?? 'Arial',
         fontSize: marker.run?.fontSize ?? fallbackFontSize,
diff --git a/packages/super-editor/package.json b/packages/super-editor/package.json
index a4900bca0a..bfe1b8386c 100644
--- a/packages/super-editor/package.json
+++ b/packages/super-editor/package.json
@@ -126,6 +126,7 @@
     "@vitejs/plugin-vue": "catalog:",
     "@vue/test-utils": "catalog:",
     "canvas": "catalog:",
+    "happy-dom": "catalog:",
     "postcss-nested": "catalog:",
     "postcss-nested-import": "catalog:",
     "prosemirror-test-builder": "catalog:",
diff --git a/packages/super-editor/src/core/inputRules/docx-paste/docx-paste.js b/packages/super-editor/src/core/inputRules/docx-paste/docx-paste.js
index c9410c43fb..54120bcbfd 100644
--- a/packages/super-editor/src/core/inputRules/docx-paste/docx-paste.js
+++ b/packages/super-editor/src/core/inputRules/docx-paste/docx-paste.js
@@ -147,7 +147,7 @@ export const handleDocxPaste = (html, editor, view) => {
       Object.keys(textStyles).forEach((key) => {
         const styleValue = textStyles[key];
         if (styleValue) {
-          item.style[key] = styleValue;
+          item.style.setProperty(key, styleValue);
         }
       });
       item.setAttribute('data-text-styles', JSON.stringify(textStyles));
@@ -157,7 +157,7 @@ export const handleDocxPaste = (html, editor, view) => {
           Object.keys(textStyles).forEach((key) => {
             const styleValue = textStyles[key];
             if (styleValue) {
-              child.style[key] = styleValue;
+              child.style.setProperty(key, styleValue);
             }
           });
         }
@@ -166,10 +166,10 @@ export const handleDocxPaste = (html, editor, view) => {
 
     // Marks
     if (resolvedStyle['font-weight'] === 'bold') {
-      item.style.fontWeight = 'bold';
+      item.style.setProperty('font-weight', 'bold');
       for (const child of item.children) {
         if (child.style) {
-          child.style.fontWeight = 'bold';
+          child.style.setProperty('font-weight', 'bold');
         }
       }
     }
@@ -288,10 +288,10 @@ const transformWordLists = (container, editor) => {
       Object.keys(textStyles).forEach((key) => {
         const styleValue = textStyles[key];
         if (styleValue) {
-          pElement.style[key] = styleValue;
+          pElement.style.setProperty(key, styleValue);
           for (const child of pElement.children) {
             if (child.style) {
-              child.style[key] = styleValue;
+              child.style.setProperty(key, styleValue);
             }
           }
         }
diff --git a/packages/super-editor/src/core/inputRules/docx-paste/docx-paste.test.js b/packages/super-editor/src/core/inputRules/docx-paste/docx-paste.test.js
index ff7b9d001e..7f751f9889 100644
--- a/packages/super-editor/src/core/inputRules/docx-paste/docx-paste.test.js
+++ b/packages/super-editor/src/core/inputRules/docx-paste/docx-paste.test.js
@@ -99,11 +99,11 @@ describe('handleDocxPaste', () => {
         </head>
         <body>
           <ol type="1" start="1">
-            <li class="MsoListParagraph" style="mso-list:l0 level1 lfo1">
-              <span>First item</span>
+            <li class="MsoListParagraph" style="mso-list:l0 level1 lfo1;font-size:13pt;font-family:Calibri">
+              <span style="font-size:13pt;font-family:Calibri">First item</span>
             </li>
           </ol>
-          <p class="MsoListParagraph" style="mso-list:l0 level1 lfo1">
+          <p class="MsoListParagraph" style="mso-list:l0 level1 lfo1;font-size:13pt;font-family:Calibri">
             <!--[if !supportLists]--><span style="font-family:Arial;font-size:12pt">2.</span><!--[endif]-->
             Second item
           </p>
diff --git a/packages/super-editor/src/core/inputRules/google-docs-paste/google-docs-paste.js b/packages/super-editor/src/core/inputRules/google-docs-paste/google-docs-paste.js
index 33de203ac0..d323ca1f26 100644
--- a/packages/super-editor/src/core/inputRules/google-docs-paste/google-docs-paste.js
+++ b/packages/super-editor/src/core/inputRules/google-docs-paste/google-docs-paste.js
@@ -158,7 +158,10 @@ function getNestedLists(nodes) {
 function mergeSeparateLists(container) {
   const tempCont = container.cloneNode(true);
 
-  const rootLevelLists = Array.from(tempCont.querySelectorAll('ol:not(ol ol):not(ul ol)') || []);
+  // Find root-level ordered lists (not nested inside other lists)
+  // Note: Using filter instead of complex :not() selectors for better browser compatibility
+  const allOls = Array.from(tempCont.querySelectorAll('ol') || []);
+  const rootLevelLists = allOls.filter((ol) => !ol.parentElement?.closest('ol, ul'));
   const mainList = rootLevelLists.find((list) => !list.getAttribute('start')) || rootLevelLists[0];
   const hasStartAttr = rootLevelLists.some((list) => list.getAttribute('start') !== null);
 
diff --git a/packages/super-editor/src/core/inputRules/html/transform-copied-lists.js b/packages/super-editor/src/core/inputRules/html/transform-copied-lists.js
index 818fd9cb22..3fb146fed5 100644
--- a/packages/super-editor/src/core/inputRules/html/transform-copied-lists.js
+++ b/packages/super-editor/src/core/inputRules/html/transform-copied-lists.js
@@ -38,7 +38,7 @@ export const transformListsInCopiedContent = (html) => {
 
       const li = child.cloneNode(true);
       li.setAttribute('aria-level', level + 1);
-      li.style['list-style-type'] = getListStyleType(numFmt, lvlText);
+      li.style.setProperty('list-style-type', getListStyleType(numFmt, lvlText));
 
       // if current level not open, create new list
       if (!stack.length || stack[stack.length - 1].level < level) {
diff --git a/packages/super-editor/src/core/presentation-editor/dom/HiddenHost.ts b/packages/super-editor/src/core/presentation-editor/dom/HiddenHost.ts
index 921c0b7a00..9cfdb9078c 100644
--- a/packages/super-editor/src/core/presentation-editor/dom/HiddenHost.ts
+++ b/packages/super-editor/src/core/presentation-editor/dom/HiddenHost.ts
@@ -22,17 +22,20 @@
 export function createHiddenHost(doc: Document, widthPx: number): HTMLElement {
   const host = doc.createElement('div');
   host.className = 'presentation-editor__hidden-host';
-  host.style.position = 'fixed';
-  host.style.left = '-9999px';
-  host.style.top = '0';
-  host.style.width = `${widthPx}px`;
+  host.style.setProperty('position', 'fixed');
+  host.style.setProperty('left', '-9999px');
+  host.style.setProperty('top', '0');
+  // Only set valid (non-negative) width values
+  if (widthPx >= 0) {
+    host.style.setProperty('width', `${widthPx}px`);
+  }
   host.style.setProperty('overflow-anchor', 'none');
-  host.style.pointerEvents = 'none';
+  host.style.setProperty('pointer-events', 'none');
   // DO NOT use visibility:hidden - it prevents focusing!
   // Instead use opacity:0 and z-index to hide while keeping focusable
-  host.style.opacity = '0';
-  host.style.zIndex = '-1';
-  host.style.userSelect = 'none';
+  host.style.setProperty('opacity', '0');
+  host.style.setProperty('z-index', '-1');
+  host.style.setProperty('user-select', 'none');
   // DO NOT set aria-hidden="true" on this element.
   // This hidden host contains the actual ProseMirror editor which must remain accessible
   // to screen readers and keyboard navigation. The viewport (#viewportHost) is aria-hidden
diff --git a/packages/super-editor/src/extensions/tab/helpers/tabDecorations.js b/packages/super-editor/src/extensions/tab/helpers/tabDecorations.js
index 4d769f1245..731fa0530d 100644
--- a/packages/super-editor/src/extensions/tab/helpers/tabDecorations.js
+++ b/packages/super-editor/src/extensions/tab/helpers/tabDecorations.js
@@ -265,13 +265,18 @@ export function measureRangeWidth(view, from, to, coordCache = null, domPosCache
     range.setEnd(toRef.node, toRef.offset);
     const rect = range.getBoundingClientRect();
     range.detach?.();
-    return rect.width || 0;
+    // If getBoundingClientRect returns 0 (e.g., HappyDOM), fall back to coordsAtPos
+    if (rect.width > 0) {
+      return rect.width;
+    }
   } catch {
-    const startLeft = getLeftCoord(view, from, coordCache, domPosCache);
-    const endLeft = getLeftCoord(view, to, coordCache, domPosCache);
-    if (startLeft == null || endLeft == null) return 0;
-    return Math.max(0, endLeft - startLeft);
+    // Fall through to coordsAtPos fallback
   }
+  // Fallback: use view.coordsAtPos difference (works in test mocks and when Range fails)
+  const startLeft = getLeftCoord(view, from, coordCache, domPosCache);
+  const endLeft = getLeftCoord(view, to, coordCache, domPosCache);
+  if (startLeft == null || endLeft == null) return 0;
+  return Math.max(0, endLeft - startLeft);
 }
 
 export function getIndentWidth(view, paragraphStartPos, indentAttrs = {}, coordCache = null, domPosCache = null) {
diff --git a/packages/super-editor/tsconfig.types.json b/packages/super-editor/tsconfig.types.json
index e33fe33ff2..e1215386a9 100644
--- a/packages/super-editor/tsconfig.types.json
+++ b/packages/super-editor/tsconfig.types.json
@@ -2,7 +2,8 @@
   "extends": "./tsconfig.build.json",
   "compilerOptions": {
     "composite": true,
-    "outDir": "dist-types"
+    "outDir": "dist",
+    "tsBuildInfoFile": "./dist/tsconfig.types.tsbuildinfo"
   },
   "references": [
     { "path": "../layout-engine/contracts/tsconfig.json" },
diff --git a/packages/super-editor/vite.config.js b/packages/super-editor/vite.config.js
index 4d24e7f37d..e0036dddb6 100644
--- a/packages/super-editor/vite.config.js
+++ b/packages/super-editor/vite.config.js
@@ -25,7 +25,8 @@ export default defineConfig(({ mode }) => {
       minWorkers,
       maxWorkers,
       globals: true,
-      environment: 'jsdom',
+      // Use happy-dom for faster tests (set VITEST_DOM=jsdom to use jsdom)
+      environment: process.env.VITEST_DOM || 'happy-dom',
       retry: 2,
       testTimeout: 20000,
       hookTimeout: 10000,
diff --git a/packages/word-layout/tsconfig.json b/packages/word-layout/tsconfig.json
index e2db4f901b..54ba67378f 100644
--- a/packages/word-layout/tsconfig.json
+++ b/packages/word-layout/tsconfig.json
@@ -5,7 +5,8 @@
     "rootDir": "./src",
     "composite": true,
     "declaration": true,
-    "declarationMap": true
+    "declarationMap": true,
+    "tsBuildInfoFile": "./dist/tsconfig.tsbuildinfo"
   },
   "include": ["src/**/*"]
 }
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 831267e50c..bddb2e276d 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -84,6 +84,9 @@ catalogs:
     eventemitter3:
       specifier: ^5.0.1
       version: 5.0.1
+    happy-dom:
+      specifier: ^20.3.4
+      version: 20.3.4
     he:
       specifier: ^1.2.0
       version: 1.2.0
@@ -294,7 +297,7 @@ importers:
         version: 8.49.0(eslint@9.39.1(jiti@2.6.1))(typescript@5.9.3)
       '@vitest/coverage-v8':
         specifier: 'catalog:'
-        version: 3.2.4(vitest@3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2))
+        version: 3.2.4(vitest@3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(happy-dom@20.3.4)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2))
       eslint:
         specifier: 'catalog:'
         version: 9.39.1(jiti@2.6.1)
@@ -345,7 +348,7 @@ importers:
         version: 0.24.0(patch_hash=b69b54a87bfd9531260555cfb2fda7c94e6f75c124e3a3fae26d64272bbe86ff)(rollup@4.53.3)(vite@7.2.7(@types/node@22.19.2)(jiti@2.6.1)(tsx@4.21.0)(yaml@2.8.2))
       vitest:
         specifier: 'catalog:'
-        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
+        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(happy-dom@20.3.4)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
     optionalDependencies:
       canvas:
         specifier: 'catalog:'
@@ -459,7 +462,7 @@ importers:
         version: 5.9.3
       vitest:
         specifier: 'catalog:'
-        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
+        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(happy-dom@20.3.4)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
       vue:
         specifier: 'catalog:'
         version: 3.5.25(typescript@5.9.3)
@@ -484,7 +487,7 @@ importers:
         version: 8.49.0(eslint@9.39.1(jiti@2.6.1))(typescript@5.9.3)
       '@vitest/coverage-v8':
         specifier: 'catalog:'
-        version: 3.2.4(vitest@3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2))
+        version: 3.2.4(vitest@3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(happy-dom@20.3.4)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2))
       concurrently:
         specifier: 'catalog:'
         version: 9.2.1
@@ -508,7 +511,7 @@ importers:
         version: 5.9.3
       vitest:
         specifier: 'catalog:'
-        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
+        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(happy-dom@20.3.4)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
 
   packages/layout-engine: {}
 
@@ -521,7 +524,7 @@ importers:
         version: 5.9.3
       vitest:
         specifier: 'catalog:'
-        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
+        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(happy-dom@20.3.4)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
 
   packages/layout-engine/layout-bridge:
     dependencies:
@@ -558,7 +561,7 @@ importers:
         version: 5.9.3
       vitest:
         specifier: 'catalog:'
-        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
+        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(happy-dom@20.3.4)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
 
   packages/layout-engine/layout-engine:
     dependencies:
@@ -604,7 +607,7 @@ importers:
     devDependencies:
       vitest:
         specifier: 'catalog:'
-        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
+        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(happy-dom@20.3.4)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
 
   packages/layout-engine/pm-adapter:
     dependencies:
@@ -644,7 +647,7 @@ importers:
         version: link:../painters/dom
       vitest:
         specifier: 'catalog:'
-        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
+        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(happy-dom@20.3.4)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
 
   packages/layout-engine/style-engine:
     dependencies:
@@ -660,7 +663,7 @@ importers:
         version: 5.9.3
       vitest:
         specifier: 'catalog:'
-        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
+        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(happy-dom@20.3.4)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
 
   packages/layout-engine/tests:
     dependencies:
@@ -827,6 +830,9 @@ importers:
       canvas:
         specifier: 'catalog:'
         version: 3.2.0
+      happy-dom:
+        specifier: 'catalog:'
+        version: 20.3.4
       postcss-nested:
         specifier: 'catalog:'
         version: 6.2.0(postcss@8.5.6)
@@ -850,7 +856,7 @@ importers:
         version: 0.24.0(patch_hash=b69b54a87bfd9531260555cfb2fda7c94e6f75c124e3a3fae26d64272bbe86ff)(rollup@4.53.3)(vite@7.2.7(@types/node@22.19.2)(jiti@2.6.1)(tsx@4.21.0)(yaml@2.8.2))
       vitest:
         specifier: 'catalog:'
-        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
+        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(happy-dom@20.3.4)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
       y-protocols:
         specifier: 'catalog:'
         version: 1.0.6(yjs@13.6.19)
@@ -944,7 +950,7 @@ importers:
         version: 0.24.0(patch_hash=b69b54a87bfd9531260555cfb2fda7c94e6f75c124e3a3fae26d64272bbe86ff)(rollup@4.53.3)(vite@7.2.7(@types/node@22.19.2)(jiti@2.6.1)(tsx@4.21.0)(yaml@2.8.2))
       vitest:
         specifier: 'catalog:'
-        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
+        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(happy-dom@20.3.4)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
       xml-js:
         specifier: 'catalog:'
         version: 1.6.11
@@ -953,7 +959,7 @@ importers:
     devDependencies:
       vitest:
         specifier: 'catalog:'
-        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
+        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(happy-dom@20.3.4)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
 
   shared/common:
     devDependencies:
@@ -968,7 +974,7 @@ importers:
         version: 5.9.3
       vitest:
         specifier: 'catalog:'
-        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
+        version: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(happy-dom@20.3.4)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
       vue:
         specifier: 'catalog:'
         version: 3.5.25(typescript@5.9.3)
@@ -2922,6 +2928,12 @@ packages:
   '@types/urijs@1.19.26':
     resolution: {integrity: sha512-wkXrVzX5yoqLnndOwFsieJA7oKM8cNkOKJtf/3vVGSUFkWDKZvFHpIl9Pvqb/T9UsawBBFMTTD8xu7sK5MWuvg==}
 
+  '@types/whatwg-mimetype@3.0.2':
+    resolution: {integrity: sha512-c2AKvDT8ToxLIOUlN51gTiHXflsfIFisS4pO7pDPoKouJCESkhZnEy623gwP9laCy5lnLDAw1vAzu2vM2YLOrA==}
+
+  '@types/ws@8.18.1':
+    resolution: {integrity: sha512-ThVF6DCVhA8kUGy+aazFQ4kXQ7E1Ty7A3ypFOe0IcJV8O/M511G99AW24irKrW56Wt44yG9+ij8FaqoBGkuBXg==}
+
   '@types/yauzl@2.10.3':
     resolution: {integrity: sha512-oJoftv0LSuaDZE3Le4DbKX+KS9G36NzOeSap90UIK0yMA/NhKJhqlSGtNDORNRaIbQfzjXDrQa0ytJ6mNRGz/Q==}
 
@@ -5250,6 +5262,10 @@ packages:
     engines: {node: '>=0.4.7'}
     hasBin: true
 
+  happy-dom@20.3.4:
+    resolution: {integrity: sha512-rfbiwB6OKxZFIFQ7SRnCPB2WL9WhyXsFoTfecYgeCeFSOBxvkWLaXsdv5ehzJrfqwXQmDephAKWLRQoFoJwrew==}
+    engines: {node: '>=20.0.0'}
+
   has-bigints@1.1.0:
     resolution: {integrity: sha512-R3pbpkcIqv2Pm3dUwgjclDRVmWpTJW2DcMzcIhEXEx1oh/CEMObMm3KLmRJOdvhM7o4uQBnwr8pzRK2sJWIqfg==}
     engines: {node: '>= 0.4'}
@@ -9397,6 +9413,10 @@ packages:
     engines: {node: '>=18'}
     deprecated: Use @exodus/bytes instead for a more spec-conformant and faster implementation
 
+  whatwg-mimetype@3.0.0:
+    resolution: {integrity: sha512-nt+N2dzIutVRxARx1nghPKGv1xHikU7HKdfafKkLNLindmPU/ch3U31NOCGGA/dmPcmb1VlofO0vnKAcsm0o/Q==}
+    engines: {node: '>=12'}
+
   whatwg-mimetype@4.0.0:
     resolution: {integrity: sha512-QaKxh0eNIi2mE9p2vEdzfagOKHCcj1pJ56EEHGQOVxp8r9/iszLUUV7v89x9O1p/T+NlTM5W7jW6+cz4Fq1YVg==}
     engines: {node: '>=18'}
@@ -12079,6 +12099,12 @@ snapshots:
 
   '@types/urijs@1.19.26': {}
 
+  '@types/whatwg-mimetype@3.0.2': {}
+
+  '@types/ws@8.18.1':
+    dependencies:
+      '@types/node': 22.19.2
+
   '@types/yauzl@2.10.3':
     dependencies:
       '@types/node': 22.19.2
@@ -12406,7 +12432,7 @@ snapshots:
       vite: 7.2.7(@types/node@22.19.2)(jiti@2.6.1)(tsx@4.21.0)(yaml@2.8.2)
       vue: 3.5.25(typescript@5.9.3)
 
-  '@vitest/coverage-v8@3.2.4(vitest@3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2))':
+  '@vitest/coverage-v8@3.2.4(vitest@3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(happy-dom@20.3.4)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2))':
     dependencies:
       '@ampproject/remapping': 2.3.0
       '@bcoe/v8-coverage': 1.0.2
@@ -12421,7 +12447,7 @@ snapshots:
       std-env: 3.10.0
       test-exclude: 7.0.1
       tinyrainbow: 2.0.0
-      vitest: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
+      vitest: 3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(happy-dom@20.3.4)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2)
     transitivePeerDependencies:
       - supports-color
 
@@ -14998,6 +15024,18 @@ snapshots:
     optionalDependencies:
       uglify-js: 3.19.3
 
+  happy-dom@20.3.4:
+    dependencies:
+      '@types/node': 22.19.2
+      '@types/whatwg-mimetype': 3.0.2
+      '@types/ws': 8.18.1
+      entities: 4.5.0
+      whatwg-mimetype: 3.0.0
+      ws: 8.18.3
+    transitivePeerDependencies:
+      - bufferutil
+      - utf-8-validate
+
   has-bigints@1.1.0: {}
 
   has-flag@3.0.0: {}
@@ -20201,7 +20239,7 @@ snapshots:
       tsx: 4.21.0
       yaml: 2.8.2
 
-  vitest@3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2):
+  vitest@3.2.4(@types/debug@4.1.12)(@types/node@22.19.2)(happy-dom@20.3.4)(jiti@2.6.1)(jsdom@27.3.0(canvas@3.2.0)(postcss@8.5.6))(tsx@4.21.0)(yaml@2.8.2):
     dependencies:
       '@types/chai': 5.2.3
       '@vitest/expect': 3.2.4
@@ -20229,6 +20267,7 @@ snapshots:
     optionalDependencies:
       '@types/debug': 4.1.12
       '@types/node': 22.19.2
+      happy-dom: 20.3.4
       jsdom: 27.3.0(canvas@3.2.0)(postcss@8.5.6)
     transitivePeerDependencies:
       - jiti
@@ -20306,6 +20345,8 @@ snapshots:
     dependencies:
       iconv-lite: 0.6.3
 
+  whatwg-mimetype@3.0.0: {}
+
   whatwg-mimetype@4.0.0: {}
 
   whatwg-url@15.1.0:
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
index 50979a0616..baaa6fc6d9 100644
--- a/pnpm-workspace.yaml
+++ b/pnpm-workspace.yaml
@@ -32,6 +32,7 @@ catalog:
   eslint-plugin-import-x: ^4.16.1
   eslint-plugin-jsdoc: ^54.1.0
   eventemitter3: ^5.0.1
+  happy-dom: ^20.3.4
   he: ^1.2.0
   husky: ^9.1.7
   jimp: ^1.6.0
diff --git a/shared/common/package.json b/shared/common/package.json
index dce4e53ede..366d030402 100644
--- a/shared/common/package.json
+++ b/shared/common/package.json
@@ -33,6 +33,7 @@
     "list-numbering"
   ],
   "scripts": {
+    "build": "tsc --project tsconfig.json --emitDeclarationOnly",
     "test": "vitest run",
     "test:watch": "vitest",
     "typecheck": "tsc --noEmit"