Chore: upgrade to Angular v21 (#11746)

src-ui/jest.config.js

@@ -1,5 +1,23 @@
+const { createEsmPreset } = require('jest-preset-angular/presets')
+
+const esmPreset = createEsmPreset({
+  tsconfig: '<rootDir>/tsconfig.spec.json',
+  stringifyContentPathRegex: '\\.(html|svg)$',
+})
+
 module.exports = {
-  preset: 'jest-preset-angular',
+  ...esmPreset,
+  transform: {
+    ...esmPreset.transform,
+    '^.+\\.(ts|js|mjs|html|svg)$': [
+      'jest-preset-angular',
+      {
+        tsconfig: '<rootDir>/tsconfig.spec.json',
+        stringifyContentPathRegex: '\\.(html|svg)$',
+        useESM: true,
+      },
+    ],
+  },
   setupFilesAfterEnv: ['<rootDir>/setup-jest.ts'],
   testPathIgnorePatterns: [
     '/node_modules/',
@@ -8,9 +26,10 @@ module.exports = {
     'abstract-paperless-service',
   ],
   transformIgnorePatterns: [
-    `<rootDir>/node_modules/.pnpm/(?!.*\\.mjs$|lodash-es|@angular\\+common.*locales)`,
+    'node_modules/(?!.*(\\.mjs$|tslib|lodash-es|@angular/common/locales/.*\\.js$))',
   ],
   moduleNameMapper: {
+    ...esmPreset.moduleNameMapper,
     '^src/(.*)': '<rootDir>/src/$1',
   },
   workerIdleMemoryLimit: '512MB',