Set up comprehensive frontend testing infrastructure

- Install Jest for unit testing with React Testing Library
- Install Playwright for end-to-end testing
- Configure Jest with proper TypeScript support and module mapping
- Create test setup files and utilities for both unit and e2e tests

Components:
* Jest configuration with coverage thresholds
* Playwright configuration with browser automation
* Unit tests for LoginForm, AuthContext, and useSocketIO hook
* E2E tests for authentication, dashboard, and agents workflows
* GitHub Actions workflow for automated testing
* Mock data and API utilities for consistent testing
* Test documentation with best practices

Testing features:
- Unit tests with 70% coverage threshold
- E2E tests with API mocking and user journey testing
- CI/CD integration for automated test runs
- Cross-browser testing support with Playwright
- Authentication system testing end-to-end

🚀 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

frontend/node_modules/dom-accessibility-api/dist/polyfills/SetLike.d.ts

@@ -0,0 +1,14 @@
+declare global {
+    class Set<T> {
+        constructor(items?: T[]);
+        add(value: T): this;
+        clear(): void;
+        delete(value: T): boolean;
+        forEach(callbackfn: (value: T, value2: T, set: Set<T>) => void, thisArg?: unknown): void;
+        has(value: T): boolean;
+        readonly size: number;
+    }
+}
+declare const _default: typeof Set;
+export default _default;
+//# sourceMappingURL=SetLike.d.ts.map

frontend/node_modules/dom-accessibility-api/dist/polyfills/SetLike.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"SetLike.d.ts","sourceRoot":"","sources":["../../sources/polyfills/SetLike.ts"],"names":[],"mappings":"AAAA,OAAO,CAAC,MAAM,CAAC;IACd,MAAM,GAAG,CAAC,CAAC;oBAEE,KAAK,CAAC,EAAE,CAAC,EAAE;QACvB,GAAG,CAAC,KAAK,EAAE,CAAC,GAAG,IAAI;QACnB,KAAK,IAAI,IAAI;QACb,MAAM,CAAC,KAAK,EAAE,CAAC,GAAG,OAAO;QACzB,OAAO,CACN,UAAU,EAAE,CAAC,KAAK,EAAE,CAAC,EAAE,MAAM,EAAE,CAAC,EAAE,GAAG,EAAE,GAAG,CAAC,CAAC,CAAC,KAAK,IAAI,EACtD,OAAO,CAAC,EAAE,OAAO,GACf,IAAI;QACP,GAAG,CAAC,KAAK,EAAE,CAAC,GAAG,OAAO;QACtB,QAAQ,CAAC,IAAI,EAAE,MAAM,CAAC;KAItB;CACD;;AAuCD,wBAA0D"}

frontend/node_modules/dom-accessibility-api/dist/polyfills/SetLike.js

@@ -0,0 +1,65 @@
+"use strict";
+
+exports.__esModule = true;
+exports.default = void 0;
+function _typeof(obj) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) { return typeof obj; } : function (obj) { return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }, _typeof(obj); }
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
+function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
+function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return _typeof(key) === "symbol" ? key : String(key); }
+function _toPrimitive(input, hint) { if (_typeof(input) !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (_typeof(res) !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
+// for environments without Set we fallback to arrays with unique members
+var SetLike = /*#__PURE__*/function () {
+  function SetLike() {
+    var items = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
+    _classCallCheck(this, SetLike);
+    _defineProperty(this, "items", void 0);
+    this.items = items;
+  }
+  _createClass(SetLike, [{
+    key: "add",
+    value: function add(value) {
+      if (this.has(value) === false) {
+        this.items.push(value);
+      }
+      return this;
+    }
+  }, {
+    key: "clear",
+    value: function clear() {
+      this.items = [];
+    }
+  }, {
+    key: "delete",
+    value: function _delete(value) {
+      var previousLength = this.items.length;
+      this.items = this.items.filter(function (item) {
+        return item !== value;
+      });
+      return previousLength !== this.items.length;
+    }
+  }, {
+    key: "forEach",
+    value: function forEach(callbackfn) {
+      var _this = this;
+      this.items.forEach(function (item) {
+        callbackfn(item, item, _this);
+      });
+    }
+  }, {
+    key: "has",
+    value: function has(value) {
+      return this.items.indexOf(value) !== -1;
+    }
+  }, {
+    key: "size",
+    get: function get() {
+      return this.items.length;
+    }
+  }]);
+  return SetLike;
+}();
+var _default = typeof Set === "undefined" ? Set : SetLike;
+exports.default = _default;
+//# sourceMappingURL=SetLike.js.map

frontend/node_modules/dom-accessibility-api/dist/polyfills/SetLike.js.map

@@ -0,0 +1 @@
+{"version":3,"file":"SetLike.js","names":["SetLike","items","value","has","push","previousLength","length","filter","item","callbackfn","forEach","indexOf","Set"],"sources":["../../sources/polyfills/SetLike.ts"],"sourcesContent":["declare global {\n\tclass Set<T> {\n\t\t// es2015.collection.d.ts\n\t\tconstructor(items?: T[]);\n\t\tadd(value: T): this;\n\t\tclear(): void;\n\t\tdelete(value: T): boolean;\n\t\tforEach(\n\t\t\tcallbackfn: (value: T, value2: T, set: Set<T>) => void,\n\t\t\tthisArg?: unknown\n\t\t): void;\n\t\thas(value: T): boolean;\n\t\treadonly size: number;\n\n\t\t// es2015.iterable.d.ts\n\t\t// no  implemennted\n\t}\n}\n\n// for environments without Set we fallback to arrays with unique members\nclass SetLike<T> implements Set<T> {\n\tprivate items: T[];\n\n\tconstructor(items: T[] = []) {\n\t\tthis.items = items;\n\t}\n\n\tadd(value: T): this {\n\t\tif (this.has(value) === false) {\n\t\t\tthis.items.push(value);\n\t\t}\n\t\treturn this;\n\t}\n\tclear(): void {\n\t\tthis.items = [];\n\t}\n\tdelete(value: T): boolean {\n\t\tconst previousLength = this.items.length;\n\t\tthis.items = this.items.filter((item) => item !== value);\n\n\t\treturn previousLength !== this.items.length;\n\t}\n\tforEach(callbackfn: (value: T, value2: T, set: Set<T>) => void): void {\n\t\tthis.items.forEach((item) => {\n\t\t\tcallbackfn(item, item, this);\n\t\t});\n\t}\n\thas(value: T): boolean {\n\t\treturn this.items.indexOf(value) !== -1;\n\t}\n\n\tget size(): number {\n\t\treturn this.items.length;\n\t}\n}\n\nexport default typeof Set === \"undefined\" ? Set : SetLike;\n"],"mappings":";;;;;;;;;;;AAmBA;AAAA,IACMA,OAAO;EAGZ,mBAA6B;IAAA,IAAjBC,KAAU,uEAAG,EAAE;IAAA;IAAA;IAC1B,IAAI,CAACA,KAAK,GAAGA,KAAK;EACnB;EAAC;IAAA;IAAA,OAED,aAAIC,KAAQ,EAAQ;MACnB,IAAI,IAAI,CAACC,GAAG,CAACD,KAAK,CAAC,KAAK,KAAK,EAAE;QAC9B,IAAI,CAACD,KAAK,CAACG,IAAI,CAACF,KAAK,CAAC;MACvB;MACA,OAAO,IAAI;IACZ;EAAC;IAAA;IAAA,OACD,iBAAc;MACb,IAAI,CAACD,KAAK,GAAG,EAAE;IAChB;EAAC;IAAA;IAAA,OACD,iBAAOC,KAAQ,EAAW;MACzB,IAAMG,cAAc,GAAG,IAAI,CAACJ,KAAK,CAACK,MAAM;MACxC,IAAI,CAACL,KAAK,GAAG,IAAI,CAACA,KAAK,CAACM,MAAM,CAAC,UAACC,IAAI;QAAA,OAAKA,IAAI,KAAKN,KAAK;MAAA,EAAC;MAExD,OAAOG,cAAc,KAAK,IAAI,CAACJ,KAAK,CAACK,MAAM;IAC5C;EAAC;IAAA;IAAA,OACD,iBAAQG,UAAsD,EAAQ;MAAA;MACrE,IAAI,CAACR,KAAK,CAACS,OAAO,CAAC,UAACF,IAAI,EAAK;QAC5BC,UAAU,CAACD,IAAI,EAAEA,IAAI,EAAE,KAAI,CAAC;MAC7B,CAAC,CAAC;IACH;EAAC;IAAA;IAAA,OACD,aAAIN,KAAQ,EAAW;MACtB,OAAO,IAAI,CAACD,KAAK,CAACU,OAAO,CAACT,KAAK,CAAC,KAAK,CAAC,CAAC;IACxC;EAAC;IAAA;IAAA,KAED,eAAmB;MAClB,OAAO,IAAI,CAACD,KAAK,CAACK,MAAM;IACzB;EAAC;EAAA;AAAA;AAAA,eAGa,OAAOM,GAAG,KAAK,WAAW,GAAGA,GAAG,GAAGZ,OAAO;AAAA"}

frontend/node_modules/dom-accessibility-api/dist/polyfills/SetLike.mjs

@@ -0,0 +1,60 @@
+function _typeof(obj) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) { return typeof obj; } : function (obj) { return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }, _typeof(obj); }
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
+function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
+function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
+function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return _typeof(key) === "symbol" ? key : String(key); }
+function _toPrimitive(input, hint) { if (_typeof(input) !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (_typeof(res) !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
+// for environments without Set we fallback to arrays with unique members
+var SetLike = /*#__PURE__*/function () {
+  function SetLike() {
+    var items = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
+    _classCallCheck(this, SetLike);
+    _defineProperty(this, "items", void 0);
+    this.items = items;
+  }
+  _createClass(SetLike, [{
+    key: "add",
+    value: function add(value) {
+      if (this.has(value) === false) {
+        this.items.push(value);
+      }
+      return this;
+    }
+  }, {
+    key: "clear",
+    value: function clear() {
+      this.items = [];
+    }
+  }, {
+    key: "delete",
+    value: function _delete(value) {
+      var previousLength = this.items.length;
+      this.items = this.items.filter(function (item) {
+        return item !== value;
+      });
+      return previousLength !== this.items.length;
+    }
+  }, {
+    key: "forEach",
+    value: function forEach(callbackfn) {
+      var _this = this;
+      this.items.forEach(function (item) {
+        callbackfn(item, item, _this);
+      });
+    }
+  }, {
+    key: "has",
+    value: function has(value) {
+      return this.items.indexOf(value) !== -1;
+    }
+  }, {
+    key: "size",
+    get: function get() {
+      return this.items.length;
+    }
+  }]);
+  return SetLike;
+}();
+export default typeof Set === "undefined" ? Set : SetLike;
+//# sourceMappingURL=SetLike.mjs.map

frontend/node_modules/dom-accessibility-api/dist/polyfills/SetLike.mjs.map

@@ -0,0 +1 @@
+{"version":3,"file":"SetLike.mjs","names":["SetLike","items","value","has","push","previousLength","length","filter","item","callbackfn","forEach","indexOf","Set"],"sources":["../../sources/polyfills/SetLike.ts"],"sourcesContent":["declare global {\n\tclass Set<T> {\n\t\t// es2015.collection.d.ts\n\t\tconstructor(items?: T[]);\n\t\tadd(value: T): this;\n\t\tclear(): void;\n\t\tdelete(value: T): boolean;\n\t\tforEach(\n\t\t\tcallbackfn: (value: T, value2: T, set: Set<T>) => void,\n\t\t\tthisArg?: unknown\n\t\t): void;\n\t\thas(value: T): boolean;\n\t\treadonly size: number;\n\n\t\t// es2015.iterable.d.ts\n\t\t// no  implemennted\n\t}\n}\n\n// for environments without Set we fallback to arrays with unique members\nclass SetLike<T> implements Set<T> {\n\tprivate items: T[];\n\n\tconstructor(items: T[] = []) {\n\t\tthis.items = items;\n\t}\n\n\tadd(value: T): this {\n\t\tif (this.has(value) === false) {\n\t\t\tthis.items.push(value);\n\t\t}\n\t\treturn this;\n\t}\n\tclear(): void {\n\t\tthis.items = [];\n\t}\n\tdelete(value: T): boolean {\n\t\tconst previousLength = this.items.length;\n\t\tthis.items = this.items.filter((item) => item !== value);\n\n\t\treturn previousLength !== this.items.length;\n\t}\n\tforEach(callbackfn: (value: T, value2: T, set: Set<T>) => void): void {\n\t\tthis.items.forEach((item) => {\n\t\t\tcallbackfn(item, item, this);\n\t\t});\n\t}\n\thas(value: T): boolean {\n\t\treturn this.items.indexOf(value) !== -1;\n\t}\n\n\tget size(): number {\n\t\treturn this.items.length;\n\t}\n}\n\nexport default typeof Set === \"undefined\" ? Set : SetLike;\n"],"mappings":";;;;;;;AAmBA;AAAA,IACMA,OAAO;EAGZ,mBAA6B;IAAA,IAAjBC,KAAU,uEAAG,EAAE;IAAA;IAAA;IAC1B,IAAI,CAACA,KAAK,GAAGA,KAAK;EACnB;EAAC;IAAA;IAAA,OAED,aAAIC,KAAQ,EAAQ;MACnB,IAAI,IAAI,CAACC,GAAG,CAACD,KAAK,CAAC,KAAK,KAAK,EAAE;QAC9B,IAAI,CAACD,KAAK,CAACG,IAAI,CAACF,KAAK,CAAC;MACvB;MACA,OAAO,IAAI;IACZ;EAAC;IAAA;IAAA,OACD,iBAAc;MACb,IAAI,CAACD,KAAK,GAAG,EAAE;IAChB;EAAC;IAAA;IAAA,OACD,iBAAOC,KAAQ,EAAW;MACzB,IAAMG,cAAc,GAAG,IAAI,CAACJ,KAAK,CAACK,MAAM;MACxC,IAAI,CAACL,KAAK,GAAG,IAAI,CAACA,KAAK,CAACM,MAAM,CAAC,UAACC,IAAI;QAAA,OAAKA,IAAI,KAAKN,KAAK;MAAA,EAAC;MAExD,OAAOG,cAAc,KAAK,IAAI,CAACJ,KAAK,CAACK,MAAM;IAC5C;EAAC;IAAA;IAAA,OACD,iBAAQG,UAAsD,EAAQ;MAAA;MACrE,IAAI,CAACR,KAAK,CAACS,OAAO,CAAC,UAACF,IAAI,EAAK;QAC5BC,UAAU,CAACD,IAAI,EAAEA,IAAI,EAAE,KAAI,CAAC;MAC7B,CAAC,CAAC;IACH;EAAC;IAAA;IAAA,OACD,aAAIN,KAAQ,EAAW;MACtB,OAAO,IAAI,CAACD,KAAK,CAACU,OAAO,CAACT,KAAK,CAAC,KAAK,CAAC,CAAC;IACxC;EAAC;IAAA;IAAA,KAED,eAAmB;MAClB,OAAO,IAAI,CAACD,KAAK,CAACK,MAAM;IACzB;EAAC;EAAA;AAAA;AAGF,eAAe,OAAOM,GAAG,KAAK,WAAW,GAAGA,GAAG,GAAGZ,OAAO"}

frontend/node_modules/dom-accessibility-api/dist/polyfills/array.from.d.ts

@@ -0,0 +1,6 @@
+/**
+ * Creates an array from an iterable object.
+ * @param iterable An iterable object to convert to an array.
+ */
+export default function arrayFrom<T>(iterable: Iterable<T> | ArrayLike<T>): T[];
+//# sourceMappingURL=array.from.d.ts.map

frontend/node_modules/dom-accessibility-api/dist/polyfills/array.from.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"array.from.d.ts","sourceRoot":"","sources":["../../sources/polyfills/array.from.ts"],"names":[],"mappings":"AAuBA;;;GAGG;AACH,MAAM,CAAC,OAAO,UAAU,SAAS,CAAC,CAAC,EAAE,QAAQ,EAAE,QAAQ,CAAC,CAAC,CAAC,GAAG,SAAS,CAAC,CAAC,CAAC,GAAG,CAAC,EAAE,CAAC"}

frontend/node_modules/dom-accessibility-api/dist/polyfills/array.from.js

@@ -0,0 +1,91 @@
+"use strict";
+
+exports.__esModule = true;
+exports.default = arrayFrom;
+/**
+ * @source {https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/from#Polyfill}
+ * but without thisArg (too hard to type, no need to `this`)
+ */
+var toStr = Object.prototype.toString;
+function isCallable(fn) {
+  return typeof fn === "function" || toStr.call(fn) === "[object Function]";
+}
+function toInteger(value) {
+  var number = Number(value);
+  if (isNaN(number)) {
+    return 0;
+  }
+  if (number === 0 || !isFinite(number)) {
+    return number;
+  }
+  return (number > 0 ? 1 : -1) * Math.floor(Math.abs(number));
+}
+var maxSafeInteger = Math.pow(2, 53) - 1;
+function toLength(value) {
+  var len = toInteger(value);
+  return Math.min(Math.max(len, 0), maxSafeInteger);
+}
+/**
+ * Creates an array from an iterable object.
+ * @param iterable An iterable object to convert to an array.
+ */
+
+/**
+ * Creates an array from an iterable object.
+ * @param iterable An iterable object to convert to an array.
+ * @param mapfn A mapping function to call on every element of the array.
+ * @param thisArg Value of 'this' used to invoke the mapfn.
+ */
+function arrayFrom(arrayLike, mapFn) {
+  // 1. Let C be the this value.
+  // edit(@eps1lon): we're not calling it as Array.from
+  var C = Array;
+
+  // 2. Let items be ToObject(arrayLike).
+  var items = Object(arrayLike);
+
+  // 3. ReturnIfAbrupt(items).
+  if (arrayLike == null) {
+    throw new TypeError("Array.from requires an array-like object - not null or undefined");
+  }
+
+  // 4. If mapfn is undefined, then let mapping be false.
+  // const mapFn = arguments.length > 1 ? arguments[1] : void undefined;
+
+  if (typeof mapFn !== "undefined") {
+    // 5. else
+    // 5. a If IsCallable(mapfn) is false, throw a TypeError exception.
+    if (!isCallable(mapFn)) {
+      throw new TypeError("Array.from: when provided, the second argument must be a function");
+    }
+  }
+
+  // 10. Let lenValue be Get(items, "length").
+  // 11. Let len be ToLength(lenValue).
+  var len = toLength(items.length);
+
+  // 13. If IsConstructor(C) is true, then
+  // 13. a. Let A be the result of calling the [[Construct]] internal method
+  // of C with an argument list containing the single item len.
+  // 14. a. Else, Let A be ArrayCreate(len).
+  var A = isCallable(C) ? Object(new C(len)) : new Array(len);
+
+  // 16. Let k be 0.
+  var k = 0;
+  // 17. Repeat, while k < len… (also steps a - h)
+  var kValue;
+  while (k < len) {
+    kValue = items[k];
+    if (mapFn) {
+      A[k] = mapFn(kValue, k);
+    } else {
+      A[k] = kValue;
+    }
+    k += 1;
+  }
+  // 18. Let putStatus be Put(A, "length", len, true).
+  A.length = len;
+  // 20. Return A.
+  return A;
+}
+//# sourceMappingURL=array.from.js.map

frontend/node_modules/dom-accessibility-api/dist/polyfills/array.from.mjs

@@ -0,0 +1,87 @@
+/**
+ * @source {https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/from#Polyfill}
+ * but without thisArg (too hard to type, no need to `this`)
+ */
+var toStr = Object.prototype.toString;
+function isCallable(fn) {
+  return typeof fn === "function" || toStr.call(fn) === "[object Function]";
+}
+function toInteger(value) {
+  var number = Number(value);
+  if (isNaN(number)) {
+    return 0;
+  }
+  if (number === 0 || !isFinite(number)) {
+    return number;
+  }
+  return (number > 0 ? 1 : -1) * Math.floor(Math.abs(number));
+}
+var maxSafeInteger = Math.pow(2, 53) - 1;
+function toLength(value) {
+  var len = toInteger(value);
+  return Math.min(Math.max(len, 0), maxSafeInteger);
+}
+/**
+ * Creates an array from an iterable object.
+ * @param iterable An iterable object to convert to an array.
+ */
+
+/**
+ * Creates an array from an iterable object.
+ * @param iterable An iterable object to convert to an array.
+ * @param mapfn A mapping function to call on every element of the array.
+ * @param thisArg Value of 'this' used to invoke the mapfn.
+ */
+export default function arrayFrom(arrayLike, mapFn) {
+  // 1. Let C be the this value.
+  // edit(@eps1lon): we're not calling it as Array.from
+  var C = Array;
+
+  // 2. Let items be ToObject(arrayLike).
+  var items = Object(arrayLike);
+
+  // 3. ReturnIfAbrupt(items).
+  if (arrayLike == null) {
+    throw new TypeError("Array.from requires an array-like object - not null or undefined");
+  }
+
+  // 4. If mapfn is undefined, then let mapping be false.
+  // const mapFn = arguments.length > 1 ? arguments[1] : void undefined;
+
+  if (typeof mapFn !== "undefined") {
+    // 5. else
+    // 5. a If IsCallable(mapfn) is false, throw a TypeError exception.
+    if (!isCallable(mapFn)) {
+      throw new TypeError("Array.from: when provided, the second argument must be a function");
+    }
+  }
+
+  // 10. Let lenValue be Get(items, "length").
+  // 11. Let len be ToLength(lenValue).
+  var len = toLength(items.length);
+
+  // 13. If IsConstructor(C) is true, then
+  // 13. a. Let A be the result of calling the [[Construct]] internal method
+  // of C with an argument list containing the single item len.
+  // 14. a. Else, Let A be ArrayCreate(len).
+  var A = isCallable(C) ? Object(new C(len)) : new Array(len);
+
+  // 16. Let k be 0.
+  var k = 0;
+  // 17. Repeat, while k < len… (also steps a - h)
+  var kValue;
+  while (k < len) {
+    kValue = items[k];
+    if (mapFn) {
+      A[k] = mapFn(kValue, k);
+    } else {
+      A[k] = kValue;
+    }
+    k += 1;
+  }
+  // 18. Let putStatus be Put(A, "length", len, true).
+  A.length = len;
+  // 20. Return A.
+  return A;
+}
+//# sourceMappingURL=array.from.mjs.map

frontend/node_modules/dom-accessibility-api/dist/polyfills/iterator.d.js

@@ -0,0 +1,2 @@
+"use strict";
+//# sourceMappingURL=iterator.d.js.map

frontend/node_modules/dom-accessibility-api/dist/polyfills/iterator.d.js.map

@@ -0,0 +1 @@
+{"version":3,"file":"iterator.d.js","names":[],"sources":["../../sources/polyfills/iterator.d.ts"],"sourcesContent":["// copied from https://github.com/microsoft/TypeScript/blob/eaeee9cc31bdc3a16f982a2e7b784573c977fdfa/lib/\n// but with `unknown` instead of `any`\ninterface IteratorYieldResult<TYield> {\n\tdone?: false;\n\tvalue: TYield;\n}\n\ninterface IteratorReturnResult<TReturn> {\n\tdone: true;\n\tvalue: TReturn;\n}\n\ntype IteratorResult<T, TReturn = unknown> =\n\t| IteratorYieldResult<T>\n\t| IteratorReturnResult<TReturn>;\n\ninterface Iterator<T, TReturn = unknown, TNext = undefined> {\n\t// NOTE: 'next' is defined using a tuple to ensure we report the correct assignability errors in all places.\n\tnext(...args: [] | [TNext]): IteratorResult<T, TReturn>;\n\treturn?(value?: TReturn): IteratorResult<T, TReturn>;\n\tthrow?(e?: unknown): IteratorResult<T, TReturn>;\n}\n\ninterface Iterable<T> {\n\t[Symbol.iterator](): Iterator<T>;\n}\n\ninterface IterableIterator<T> extends Iterator<T> {\n\t[Symbol.iterator](): IterableIterator<T>;\n}\ninterface SymbolConstructor {\n\t/**\n\t * A method that returns the default iterator for an object. Called by the semantics of the\n\t * for-of statement.\n\t */\n\treadonly iterator: symbol;\n}\n\ndeclare const Symbol: SymbolConstructor;\n"],"mappings":""}

frontend/node_modules/dom-accessibility-api/dist/polyfills/iterator.d.mjs

@@ -0,0 +1,2 @@
+
+//# sourceMappingURL=iterator.d.mjs.map

frontend/node_modules/dom-accessibility-api/dist/polyfills/iterator.d.mjs.map

@@ -0,0 +1 @@
+{"version":3,"file":"iterator.d.mjs","names":[],"sources":["../../sources/polyfills/iterator.d.ts"],"sourcesContent":["// copied from https://github.com/microsoft/TypeScript/blob/eaeee9cc31bdc3a16f982a2e7b784573c977fdfa/lib/\n// but with `unknown` instead of `any`\ninterface IteratorYieldResult<TYield> {\n\tdone?: false;\n\tvalue: TYield;\n}\n\ninterface IteratorReturnResult<TReturn> {\n\tdone: true;\n\tvalue: TReturn;\n}\n\ntype IteratorResult<T, TReturn = unknown> =\n\t| IteratorYieldResult<T>\n\t| IteratorReturnResult<TReturn>;\n\ninterface Iterator<T, TReturn = unknown, TNext = undefined> {\n\t// NOTE: 'next' is defined using a tuple to ensure we report the correct assignability errors in all places.\n\tnext(...args: [] | [TNext]): IteratorResult<T, TReturn>;\n\treturn?(value?: TReturn): IteratorResult<T, TReturn>;\n\tthrow?(e?: unknown): IteratorResult<T, TReturn>;\n}\n\ninterface Iterable<T> {\n\t[Symbol.iterator](): Iterator<T>;\n}\n\ninterface IterableIterator<T> extends Iterator<T> {\n\t[Symbol.iterator](): IterableIterator<T>;\n}\ninterface SymbolConstructor {\n\t/**\n\t * A method that returns the default iterator for an object. Called by the semantics of the\n\t * for-of statement.\n\t */\n\treadonly iterator: symbol;\n}\n\ndeclare const Symbol: SymbolConstructor;\n"],"mappings":""}