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/@testing-library/user-event/dist/cjs/event/behavior/click.js

@@ -0,0 +1,32 @@
+'use strict';
+
+var isElementType = require('../../utils/misc/isElementType.js');
+require('../../utils/dataTransfer/Clipboard.js');
+var getWindow = require('../../utils/misc/getWindow.js');
+var isFocusable = require('../../utils/focus/isFocusable.js');
+var cloneEvent = require('../../utils/misc/cloneEvent.js');
+var focus = require('../focus.js');
+var registry = require('./registry.js');
+
+registry.behavior.click = (event, target, instance)=>{
+    const context = target.closest('button,input,label,select,textarea');
+    const control = context && isElementType.isElementType(context, 'label') && context.control;
+    if (control && control !== target) {
+        return ()=>{
+            if (isFocusable.isFocusable(control)) {
+                focus.focusElement(control);
+                instance.dispatchEvent(control, cloneEvent.cloneEvent(event));
+            }
+        };
+    } else if (isElementType.isElementType(target, 'input', {
+        type: 'file'
+    })) {
+        return ()=>{
+            // blur fires when the file selector pops up
+            focus.blurElement(target);
+            target.dispatchEvent(new (getWindow.getWindow(target)).Event('fileDialog'));
+            // focus fires after the file selector has been closed
+            focus.focusElement(target);
+        };
+    }
+};

frontend/node_modules/@testing-library/user-event/dist/cjs/event/behavior/cut.js

@@ -0,0 +1,14 @@
+'use strict';
+
+require('../../utils/dataTransfer/Clipboard.js');
+var isEditable = require('../../utils/edit/isEditable.js');
+var input = require('../input.js');
+var registry = require('./registry.js');
+
+registry.behavior.cut = (event, target, instance)=>{
+    return ()=>{
+        if (isEditable.isEditable(target)) {
+            input.input(instance, target, '', 'deleteByCut');
+        }
+    };
+};

frontend/node_modules/@testing-library/user-event/dist/cjs/event/behavior/index.js

@@ -0,0 +1,13 @@
+'use strict';
+
+require('./click.js');
+require('./cut.js');
+require('./keydown.js');
+require('./keypress.js');
+require('./keyup.js');
+require('./paste.js');
+var registry = require('./registry.js');
+
+
+
+exports.behavior = registry.behavior;

frontend/node_modules/@testing-library/user-event/dist/cjs/event/behavior/keydown.js

@@ -0,0 +1,128 @@
+'use strict';
+
+var UI = require('../../document/UI.js');
+var getValueOrTextContent = require('../../document/getValueOrTextContent.js');
+var isElementType = require('../../utils/misc/isElementType.js');
+require('../../utils/dataTransfer/Clipboard.js');
+var isContentEditable = require('../../utils/edit/isContentEditable.js');
+var isEditable = require('../../utils/edit/isEditable.js');
+var getTabDestination = require('../../utils/focus/getTabDestination.js');
+var selection = require('../../utils/focus/selection.js');
+var focus = require('../focus.js');
+var input = require('../input.js');
+var moveSelection = require('../selection/moveSelection.js');
+var selectAll = require('../selection/selectAll.js');
+var setSelectionRange = require('../selection/setSelectionRange.js');
+var radio = require('../radio.js');
+var registry = require('./registry.js');
+
+registry.behavior.keydown = (event, target, instance)=>{
+    var _keydownBehavior_event_key;
+    var _keydownBehavior_event_key1;
+    return (_keydownBehavior_event_key1 = (_keydownBehavior_event_key = keydownBehavior[event.key]) === null || _keydownBehavior_event_key === undefined ? undefined : _keydownBehavior_event_key.call(keydownBehavior, event, target, instance)) !== null && _keydownBehavior_event_key1 !== undefined ? _keydownBehavior_event_key1 : combinationBehavior(event, target, instance);
+};
+const keydownBehavior = {
+    ArrowDown: (event, target, instance)=>{
+        /* istanbul ignore else */ if (isElementType.isElementType(target, 'input', {
+            type: 'radio'
+        })) {
+            return ()=>radio.walkRadio(instance, target, 1);
+        }
+    },
+    ArrowLeft: (event, target, instance)=>{
+        if (isElementType.isElementType(target, 'input', {
+            type: 'radio'
+        })) {
+            return ()=>radio.walkRadio(instance, target, -1);
+        }
+        return ()=>moveSelection.moveSelection(target, -1);
+    },
+    ArrowRight: (event, target, instance)=>{
+        if (isElementType.isElementType(target, 'input', {
+            type: 'radio'
+        })) {
+            return ()=>radio.walkRadio(instance, target, 1);
+        }
+        return ()=>moveSelection.moveSelection(target, 1);
+    },
+    ArrowUp: (event, target, instance)=>{
+        /* istanbul ignore else */ if (isElementType.isElementType(target, 'input', {
+            type: 'radio'
+        })) {
+            return ()=>radio.walkRadio(instance, target, -1);
+        }
+    },
+    Backspace: (event, target, instance)=>{
+        if (isEditable.isEditable(target)) {
+            return ()=>{
+                input.input(instance, target, '', 'deleteContentBackward');
+            };
+        }
+    },
+    Delete: (event, target, instance)=>{
+        if (isEditable.isEditable(target)) {
+            return ()=>{
+                input.input(instance, target, '', 'deleteContentForward');
+            };
+        }
+    },
+    End: (event, target)=>{
+        if (isElementType.isElementType(target, [
+            'input',
+            'textarea'
+        ]) || isContentEditable.isContentEditable(target)) {
+            return ()=>{
+                var _getValueOrTextContent;
+                var _getValueOrTextContent_length;
+                const newPos = (_getValueOrTextContent_length = (_getValueOrTextContent = getValueOrTextContent.getValueOrTextContent(target)) === null || _getValueOrTextContent === undefined ? undefined : _getValueOrTextContent.length) !== null && _getValueOrTextContent_length !== undefined ? _getValueOrTextContent_length : /* istanbul ignore next */ 0;
+                setSelectionRange.setSelectionRange(target, newPos, newPos);
+            };
+        }
+    },
+    Home: (event, target)=>{
+        if (isElementType.isElementType(target, [
+            'input',
+            'textarea'
+        ]) || isContentEditable.isContentEditable(target)) {
+            return ()=>{
+                setSelectionRange.setSelectionRange(target, 0, 0);
+            };
+        }
+    },
+    PageDown: (event, target)=>{
+        if (isElementType.isElementType(target, [
+            'input'
+        ])) {
+            return ()=>{
+                const newPos = UI.getUIValue(target).length;
+                setSelectionRange.setSelectionRange(target, newPos, newPos);
+            };
+        }
+    },
+    PageUp: (event, target)=>{
+        if (isElementType.isElementType(target, [
+            'input'
+        ])) {
+            return ()=>{
+                setSelectionRange.setSelectionRange(target, 0, 0);
+            };
+        }
+    },
+    Tab: (event, target, instance)=>{
+        return ()=>{
+            const dest = getTabDestination.getTabDestination(target, instance.system.keyboard.modifiers.Shift);
+            focus.focusElement(dest);
+            if (selection.hasOwnSelection(dest)) {
+                UI.setUISelection(dest, {
+                    anchorOffset: 0,
+                    focusOffset: dest.value.length
+                });
+            }
+        };
+    }
+};
+const combinationBehavior = (event, target, instance)=>{
+    if (event.code === 'KeyA' && instance.system.keyboard.modifiers.Control) {
+        return ()=>selectAll.selectAll(target);
+    }
+};

frontend/node_modules/@testing-library/user-event/dist/cjs/event/behavior/keypress.js

@@ -0,0 +1,51 @@
+'use strict';
+
+var isElementType = require('../../utils/misc/isElementType.js');
+require('../../utils/dataTransfer/Clipboard.js');
+var isContentEditable = require('../../utils/edit/isContentEditable.js');
+var isEditable = require('../../utils/edit/isEditable.js');
+var input = require('../input.js');
+var registry = require('./registry.js');
+
+registry.behavior.keypress = (event, target, instance)=>{
+    if (event.key === 'Enter') {
+        if (isElementType.isElementType(target, 'button') || isElementType.isElementType(target, 'input') && ClickInputOnEnter.includes(target.type) || isElementType.isElementType(target, 'a') && Boolean(target.href)) {
+            return ()=>{
+                instance.dispatchUIEvent(target, 'click');
+            };
+        } else if (isElementType.isElementType(target, 'input')) {
+            const form = target.form;
+            const submit = form === null || form === undefined ? undefined : form.querySelector('input[type="submit"], button:not([type]), button[type="submit"]');
+            if (submit) {
+                return ()=>instance.dispatchUIEvent(submit, 'click');
+            } else if (form && SubmitSingleInputOnEnter.includes(target.type) && form.querySelectorAll('input').length === 1) {
+                return ()=>instance.dispatchUIEvent(form, 'submit');
+            } else {
+                return;
+            }
+        }
+    }
+    if (isEditable.isEditable(target)) {
+        const inputType = event.key === 'Enter' ? isContentEditable.isContentEditable(target) && !instance.system.keyboard.modifiers.Shift ? 'insertParagraph' : 'insertLineBreak' : 'insertText';
+        const inputData = event.key === 'Enter' ? '\n' : event.key;
+        return ()=>input.input(instance, target, inputData, inputType);
+    }
+};
+const ClickInputOnEnter = [
+    'button',
+    'color',
+    'file',
+    'image',
+    'reset',
+    'submit'
+];
+const SubmitSingleInputOnEnter = [
+    'email',
+    'month',
+    'password',
+    'search',
+    'tel',
+    'text',
+    'url',
+    'week'
+];

frontend/node_modules/@testing-library/user-event/dist/cjs/event/behavior/keyup.js

@@ -0,0 +1,17 @@
+'use strict';
+
+var isClickableInput = require('../../utils/click/isClickableInput.js');
+require('../../utils/dataTransfer/Clipboard.js');
+var registry = require('./registry.js');
+
+registry.behavior.keyup = (event, target, instance)=>{
+    var _keyupBehavior_event_key;
+    return (_keyupBehavior_event_key = keyupBehavior[event.key]) === null || _keyupBehavior_event_key === undefined ? undefined : _keyupBehavior_event_key.call(keyupBehavior, event, target, instance);
+};
+const keyupBehavior = {
+    ' ': (event, target, instance)=>{
+        if (isClickableInput.isClickableInput(target)) {
+            return ()=>instance.dispatchUIEvent(target, 'click');
+        }
+    }
+};

frontend/node_modules/@testing-library/user-event/dist/cjs/event/behavior/paste.js

@@ -0,0 +1,18 @@
+'use strict';
+
+require('../../utils/dataTransfer/Clipboard.js');
+var isEditable = require('../../utils/edit/isEditable.js');
+var input = require('../input.js');
+var registry = require('./registry.js');
+
+registry.behavior.paste = (event, target, instance)=>{
+    if (isEditable.isEditable(target)) {
+        return ()=>{
+            var _event_clipboardData;
+            const insertData = (_event_clipboardData = event.clipboardData) === null || _event_clipboardData === undefined ? undefined : _event_clipboardData.getData('text');
+            if (insertData) {
+                input.input(instance, target, insertData, 'insertFromPaste');
+            }
+        };
+    }
+};

frontend/node_modules/@testing-library/user-event/dist/cjs/event/behavior/registry.js

@@ -0,0 +1,5 @@
+'use strict';
+
+const behavior = {};
+
+exports.behavior = behavior;

frontend/node_modules/@testing-library/user-event/dist/cjs/event/createEvent.js

@@ -0,0 +1,207 @@
+'use strict';
+
+require('../utils/dataTransfer/Clipboard.js');
+var getWindow = require('../utils/misc/getWindow.js');
+var eventMap = require('./eventMap.js');
+
+const eventInitializer = {
+    ClipboardEvent: [
+        initClipboardEvent
+    ],
+    Event: [],
+    FocusEvent: [
+        initUIEvent,
+        initFocusEvent
+    ],
+    InputEvent: [
+        initUIEvent,
+        initInputEvent
+    ],
+    MouseEvent: [
+        initUIEvent,
+        initUIEventModifiers,
+        initMouseEvent
+    ],
+    PointerEvent: [
+        initUIEvent,
+        initUIEventModifiers,
+        initMouseEvent,
+        initPointerEvent
+    ],
+    KeyboardEvent: [
+        initUIEvent,
+        initUIEventModifiers,
+        initKeyboardEvent
+    ]
+};
+function createEvent(type, target, init) {
+    const window = getWindow.getWindow(target);
+    const { EventType, defaultInit } = eventMap.eventMap[type];
+    const event = new (getEventConstructors(window))[EventType](type, defaultInit);
+    eventInitializer[EventType].forEach((f)=>f(event, init !== null && init !== undefined ? init : {}));
+    return event;
+}
+/* istanbul ignore next */ function getEventConstructors(window) {
+    var _window_Event;
+    /* eslint-disable @typescript-eslint/no-unnecessary-condition, @typescript-eslint/no-extraneous-class */ const Event = (_window_Event = window.Event) !== null && _window_Event !== undefined ? _window_Event : class Event {
+    };
+    var _window_AnimationEvent;
+    const AnimationEvent = (_window_AnimationEvent = window.AnimationEvent) !== null && _window_AnimationEvent !== undefined ? _window_AnimationEvent : class AnimationEvent extends Event {
+    };
+    var _window_ClipboardEvent;
+    const ClipboardEvent = (_window_ClipboardEvent = window.ClipboardEvent) !== null && _window_ClipboardEvent !== undefined ? _window_ClipboardEvent : class ClipboardEvent extends Event {
+    };
+    var _window_PopStateEvent;
+    const PopStateEvent = (_window_PopStateEvent = window.PopStateEvent) !== null && _window_PopStateEvent !== undefined ? _window_PopStateEvent : class PopStateEvent extends Event {
+    };
+    var _window_ProgressEvent;
+    const ProgressEvent = (_window_ProgressEvent = window.ProgressEvent) !== null && _window_ProgressEvent !== undefined ? _window_ProgressEvent : class ProgressEvent extends Event {
+    };
+    var _window_TransitionEvent;
+    const TransitionEvent = (_window_TransitionEvent = window.TransitionEvent) !== null && _window_TransitionEvent !== undefined ? _window_TransitionEvent : class TransitionEvent extends Event {
+    };
+    var _window_UIEvent;
+    const UIEvent = (_window_UIEvent = window.UIEvent) !== null && _window_UIEvent !== undefined ? _window_UIEvent : class UIEvent extends Event {
+    };
+    var _window_CompositionEvent;
+    const CompositionEvent = (_window_CompositionEvent = window.CompositionEvent) !== null && _window_CompositionEvent !== undefined ? _window_CompositionEvent : class CompositionEvent extends UIEvent {
+    };
+    var _window_FocusEvent;
+    const FocusEvent = (_window_FocusEvent = window.FocusEvent) !== null && _window_FocusEvent !== undefined ? _window_FocusEvent : class FocusEvent extends UIEvent {
+    };
+    var _window_InputEvent;
+    const InputEvent = (_window_InputEvent = window.InputEvent) !== null && _window_InputEvent !== undefined ? _window_InputEvent : class InputEvent extends UIEvent {
+    };
+    var _window_KeyboardEvent;
+    const KeyboardEvent = (_window_KeyboardEvent = window.KeyboardEvent) !== null && _window_KeyboardEvent !== undefined ? _window_KeyboardEvent : class KeyboardEvent extends UIEvent {
+    };
+    var _window_MouseEvent;
+    const MouseEvent = (_window_MouseEvent = window.MouseEvent) !== null && _window_MouseEvent !== undefined ? _window_MouseEvent : class MouseEvent extends UIEvent {
+    };
+    var _window_DragEvent;
+    const DragEvent = (_window_DragEvent = window.DragEvent) !== null && _window_DragEvent !== undefined ? _window_DragEvent : class DragEvent extends MouseEvent {
+    };
+    var _window_PointerEvent;
+    const PointerEvent = (_window_PointerEvent = window.PointerEvent) !== null && _window_PointerEvent !== undefined ? _window_PointerEvent : class PointerEvent extends MouseEvent {
+    };
+    var _window_TouchEvent;
+    const TouchEvent = (_window_TouchEvent = window.TouchEvent) !== null && _window_TouchEvent !== undefined ? _window_TouchEvent : class TouchEvent extends UIEvent {
+    };
+    /* eslint-enable @typescript-eslint/no-unnecessary-condition, @typescript-eslint/no-extraneous-class */ return {
+        Event,
+        AnimationEvent,
+        ClipboardEvent,
+        PopStateEvent,
+        ProgressEvent,
+        TransitionEvent,
+        UIEvent,
+        CompositionEvent,
+        FocusEvent,
+        InputEvent,
+        KeyboardEvent,
+        MouseEvent,
+        DragEvent,
+        PointerEvent,
+        TouchEvent
+    };
+}
+function assignProps(obj, props) {
+    for (const [key, value] of Object.entries(props)){
+        Object.defineProperty(obj, key, {
+            get: ()=>value !== null && value !== undefined ? value : null
+        });
+    }
+}
+function sanitizeNumber(n) {
+    return Number(n !== null && n !== undefined ? n : 0);
+}
+function initClipboardEvent(event, { clipboardData }) {
+    assignProps(event, {
+        clipboardData
+    });
+}
+function initFocusEvent(event, { relatedTarget }) {
+    assignProps(event, {
+        relatedTarget
+    });
+}
+function initInputEvent(event, { data, inputType, isComposing }) {
+    assignProps(event, {
+        data,
+        isComposing: Boolean(isComposing),
+        inputType: String(inputType)
+    });
+}
+function initUIEvent(event, { view, detail }) {
+    assignProps(event, {
+        view,
+        detail: sanitizeNumber(detail !== null && detail !== undefined ? detail : 0)
+    });
+}
+function initUIEventModifiers(event, { altKey, ctrlKey, metaKey, shiftKey, modifierAltGraph, modifierCapsLock, modifierFn, modifierFnLock, modifierNumLock, modifierScrollLock, modifierSymbol, modifierSymbolLock }) {
+    assignProps(event, {
+        altKey: Boolean(altKey),
+        ctrlKey: Boolean(ctrlKey),
+        metaKey: Boolean(metaKey),
+        shiftKey: Boolean(shiftKey),
+        getModifierState (k) {
+            return Boolean({
+                Alt: altKey,
+                AltGraph: modifierAltGraph,
+                CapsLock: modifierCapsLock,
+                Control: ctrlKey,
+                Fn: modifierFn,
+                FnLock: modifierFnLock,
+                Meta: metaKey,
+                NumLock: modifierNumLock,
+                ScrollLock: modifierScrollLock,
+                Shift: shiftKey,
+                Symbol: modifierSymbol,
+                SymbolLock: modifierSymbolLock
+            }[k]);
+        }
+    });
+}
+function initKeyboardEvent(event, { key, code, location, repeat, isComposing, charCode }) {
+    assignProps(event, {
+        key: String(key),
+        code: String(code),
+        location: sanitizeNumber(location),
+        repeat: Boolean(repeat),
+        isComposing: Boolean(isComposing),
+        charCode
+    });
+}
+function initMouseEvent(event, { x, y, screenX, screenY, clientX = x, clientY = y, button, buttons, relatedTarget, offsetX, offsetY, pageX, pageY }) {
+    assignProps(event, {
+        screenX: sanitizeNumber(screenX),
+        screenY: sanitizeNumber(screenY),
+        clientX: sanitizeNumber(clientX),
+        x: sanitizeNumber(clientX),
+        clientY: sanitizeNumber(clientY),
+        y: sanitizeNumber(clientY),
+        button: sanitizeNumber(button),
+        buttons: sanitizeNumber(buttons),
+        relatedTarget,
+        offsetX: sanitizeNumber(offsetX),
+        offsetY: sanitizeNumber(offsetY),
+        pageX: sanitizeNumber(pageX),
+        pageY: sanitizeNumber(pageY)
+    });
+}
+function initPointerEvent(event, { pointerId, width, height, pressure, tangentialPressure, tiltX, tiltY, twist, pointerType, isPrimary }) {
+    assignProps(event, {
+        pointerId: sanitizeNumber(pointerId),
+        width: sanitizeNumber(width !== null && width !== undefined ? width : 1),
+        height: sanitizeNumber(height !== null && height !== undefined ? height : 1),
+        pressure: sanitizeNumber(pressure),
+        tangentialPressure: sanitizeNumber(tangentialPressure),
+        tiltX: sanitizeNumber(tiltX),
+        tiltY: sanitizeNumber(tiltY),
+        twist: sanitizeNumber(twist),
+        pointerType: String(pointerType),
+        isPrimary: Boolean(isPrimary)
+    });
+}
+
+exports.createEvent = createEvent;

frontend/node_modules/@testing-library/user-event/dist/cjs/event/dispatchEvent.js

@@ -0,0 +1,54 @@
+'use strict';
+
+require('./behavior/click.js');
+require('./behavior/cut.js');
+require('./behavior/keydown.js');
+require('./behavior/keypress.js');
+require('./behavior/keyup.js');
+require('./behavior/paste.js');
+var registry = require('./behavior/registry.js');
+var wrapEvent = require('./wrapEvent.js');
+var eventMap = require('./eventMap.js');
+var createEvent = require('./createEvent.js');
+
+function dispatchUIEvent(target, type, init, preventDefault = false) {
+    if (eventMap.isMouseEvent(type) || eventMap.isKeyboardEvent(type)) {
+        init = {
+            ...init,
+            ...this.system.getUIEventModifiers()
+        };
+    }
+    const event = createEvent.createEvent(type, target, init);
+    return dispatchEvent.call(this, target, event, preventDefault);
+}
+function dispatchEvent(target, event, preventDefault = false) {
+    var _behavior_type;
+    const type = event.type;
+    const behaviorImplementation = preventDefault ? ()=>{} : (_behavior_type = registry.behavior[type]) === null || _behavior_type === undefined ? undefined : _behavior_type.call(registry.behavior, event, target, this);
+    if (behaviorImplementation) {
+        event.preventDefault();
+        let defaultPrevented = false;
+        Object.defineProperty(event, 'defaultPrevented', {
+            get: ()=>defaultPrevented
+        });
+        Object.defineProperty(event, 'preventDefault', {
+            value: ()=>{
+                defaultPrevented = event.cancelable;
+            }
+        });
+        wrapEvent.wrapEvent(()=>target.dispatchEvent(event));
+        if (!defaultPrevented) {
+            behaviorImplementation();
+        }
+        return !defaultPrevented;
+    }
+    return wrapEvent.wrapEvent(()=>target.dispatchEvent(event));
+}
+function dispatchDOMEvent(target, type, init) {
+    const event = createEvent.createEvent(type, target, init);
+    wrapEvent.wrapEvent(()=>target.dispatchEvent(event));
+}
+
+exports.dispatchDOMEvent = dispatchDOMEvent;
+exports.dispatchEvent = dispatchEvent;
+exports.dispatchUIEvent = dispatchUIEvent;

frontend/node_modules/@testing-library/user-event/dist/cjs/event/eventMap.js

@@ -0,0 +1,281 @@
+'use strict';
+
+const eventMap = {
+    auxclick: {
+        EventType: 'PointerEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true,
+            composed: true
+        }
+    },
+    beforeinput: {
+        EventType: 'InputEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true,
+            composed: true
+        }
+    },
+    blur: {
+        EventType: 'FocusEvent',
+        defaultInit: {
+            bubbles: false,
+            cancelable: false,
+            composed: true
+        }
+    },
+    click: {
+        EventType: 'PointerEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true,
+            composed: true
+        }
+    },
+    contextmenu: {
+        EventType: 'PointerEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true,
+            composed: true
+        }
+    },
+    copy: {
+        EventType: 'ClipboardEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true,
+            composed: true
+        }
+    },
+    change: {
+        EventType: 'Event',
+        defaultInit: {
+            bubbles: true,
+            cancelable: false
+        }
+    },
+    cut: {
+        EventType: 'ClipboardEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true,
+            composed: true
+        }
+    },
+    dblclick: {
+        EventType: 'MouseEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true,
+            composed: true
+        }
+    },
+    focus: {
+        EventType: 'FocusEvent',
+        defaultInit: {
+            bubbles: false,
+            cancelable: false,
+            composed: true
+        }
+    },
+    focusin: {
+        EventType: 'FocusEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: false,
+            composed: true
+        }
+    },
+    focusout: {
+        EventType: 'FocusEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: false,
+            composed: true
+        }
+    },
+    keydown: {
+        EventType: 'KeyboardEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true,
+            composed: true
+        }
+    },
+    keypress: {
+        EventType: 'KeyboardEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true,
+            composed: true
+        }
+    },
+    keyup: {
+        EventType: 'KeyboardEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true,
+            composed: true
+        }
+    },
+    paste: {
+        EventType: 'ClipboardEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true,
+            composed: true
+        }
+    },
+    input: {
+        EventType: 'InputEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: false,
+            composed: true
+        }
+    },
+    mousedown: {
+        EventType: 'MouseEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true,
+            composed: true
+        }
+    },
+    mouseenter: {
+        EventType: 'MouseEvent',
+        defaultInit: {
+            bubbles: false,
+            cancelable: false,
+            composed: true
+        }
+    },
+    mouseleave: {
+        EventType: 'MouseEvent',
+        defaultInit: {
+            bubbles: false,
+            cancelable: false,
+            composed: true
+        }
+    },
+    mousemove: {
+        EventType: 'MouseEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true,
+            composed: true
+        }
+    },
+    mouseout: {
+        EventType: 'MouseEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true,
+            composed: true
+        }
+    },
+    mouseover: {
+        EventType: 'MouseEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true,
+            composed: true
+        }
+    },
+    mouseup: {
+        EventType: 'MouseEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true,
+            composed: true
+        }
+    },
+    pointerover: {
+        EventType: 'PointerEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true,
+            composed: true
+        }
+    },
+    pointerenter: {
+        EventType: 'PointerEvent',
+        defaultInit: {
+            bubbles: false,
+            cancelable: false
+        }
+    },
+    pointerdown: {
+        EventType: 'PointerEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true,
+            composed: true
+        }
+    },
+    pointermove: {
+        EventType: 'PointerEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true,
+            composed: true
+        }
+    },
+    pointerup: {
+        EventType: 'PointerEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true,
+            composed: true
+        }
+    },
+    pointercancel: {
+        EventType: 'PointerEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: false,
+            composed: true
+        }
+    },
+    pointerout: {
+        EventType: 'PointerEvent',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true,
+            composed: true
+        }
+    },
+    pointerleave: {
+        EventType: 'PointerEvent',
+        defaultInit: {
+            bubbles: false,
+            cancelable: false
+        }
+    },
+    submit: {
+        EventType: 'Event',
+        defaultInit: {
+            bubbles: true,
+            cancelable: true
+        }
+    }
+};
+function getEventClass(type) {
+    return eventMap[type].EventType;
+}
+const mouseEvents = [
+    'MouseEvent',
+    'PointerEvent'
+];
+function isMouseEvent(type) {
+    return mouseEvents.includes(getEventClass(type));
+}
+function isKeyboardEvent(type) {
+    return getEventClass(type) === 'KeyboardEvent';
+}
+
+exports.eventMap = eventMap;
+exports.isKeyboardEvent = isKeyboardEvent;
+exports.isMouseEvent = isMouseEvent;

frontend/node_modules/@testing-library/user-event/dist/cjs/event/focus.js

@@ -0,0 +1,34 @@
+'use strict';
+
+require('../utils/dataTransfer/Clipboard.js');
+var getActiveElement = require('../utils/focus/getActiveElement.js');
+var isFocusable = require('../utils/focus/isFocusable.js');
+var findClosest = require('../utils/misc/findClosest.js');
+var updateSelectionOnFocus = require('./selection/updateSelectionOnFocus.js');
+var wrapEvent = require('./wrapEvent.js');
+
+// Browsers do not dispatch FocusEvent if the document does not have focus.
+// TODO: simulate FocusEvent in browsers
+/**
+ * Focus closest focusable element.
+ */ function focusElement(element) {
+    const target = findClosest.findClosest(element, isFocusable.isFocusable);
+    const activeElement = getActiveElement.getActiveElement(element.ownerDocument);
+    if ((target !== null && target !== undefined ? target : element.ownerDocument.body) === activeElement) {
+        return;
+    } else if (target) {
+        wrapEvent.wrapEvent(()=>target.focus());
+    } else {
+        wrapEvent.wrapEvent(()=>activeElement === null || activeElement === undefined ? undefined : activeElement.blur());
+    }
+    updateSelectionOnFocus.updateSelectionOnFocus(target !== null && target !== undefined ? target : element.ownerDocument.body);
+}
+function blurElement(element) {
+    if (!isFocusable.isFocusable(element)) return;
+    const wasActive = getActiveElement.getActiveElement(element.ownerDocument) === element;
+    if (!wasActive) return;
+    wrapEvent.wrapEvent(()=>element.blur());
+}
+
+exports.blurElement = blurElement;
+exports.focusElement = focusElement;

frontend/node_modules/@testing-library/user-event/dist/cjs/event/index.js

@@ -0,0 +1,22 @@
+'use strict';
+
+var dispatchEvent = require('./dispatchEvent.js');
+var focus = require('./focus.js');
+var input = require('./input.js');
+require('../utils/dataTransfer/Clipboard.js');
+var setSelectionPerMouse = require('./selection/setSelectionPerMouse.js');
+var modifySelectionPerMouse = require('./selection/modifySelectionPerMouse.js');
+var selectAll = require('./selection/selectAll.js');
+
+
+
+exports.dispatchDOMEvent = dispatchEvent.dispatchDOMEvent;
+exports.dispatchEvent = dispatchEvent.dispatchEvent;
+exports.dispatchUIEvent = dispatchEvent.dispatchUIEvent;
+exports.blurElement = focus.blurElement;
+exports.focusElement = focus.focusElement;
+exports.input = input.input;
+exports.setSelectionPerMouseDown = setSelectionPerMouse.setSelectionPerMouseDown;
+exports.modifySelectionPerMouseMove = modifySelectionPerMouse.modifySelectionPerMouseMove;
+exports.isAllSelected = selectAll.isAllSelected;
+exports.selectAll = selectAll.selectAll;

frontend/node_modules/@testing-library/user-event/dist/cjs/event/input.js

@@ -0,0 +1,157 @@
+'use strict';
+
+var UI = require('../document/UI.js');
+var isElementType = require('../utils/misc/isElementType.js');
+require('../utils/dataTransfer/Clipboard.js');
+var timeValue = require('../utils/edit/timeValue.js');
+var maxLength = require('../utils/edit/maxLength.js');
+var cursor = require('../utils/focus/cursor.js');
+var trackValue = require('../document/trackValue.js');
+var getInputRange = require('./selection/getInputRange.js');
+var setSelection = require('./selection/setSelection.js');
+
+function isDateOrTime(element) {
+    return isElementType.isElementType(element, 'input') && [
+        'date',
+        'time'
+    ].includes(element.type);
+}
+function input(instance, element, data, inputType = 'insertText') {
+    const inputRange = getInputRange.getInputRange(element);
+    /* istanbul ignore if */ if (!inputRange) {
+        return;
+    }
+    // There is no `beforeinput` event on `date` and `time` input
+    if (!isDateOrTime(element)) {
+        const unprevented = instance.dispatchUIEvent(element, 'beforeinput', {
+            inputType,
+            data
+        });
+        if (!unprevented) {
+            return;
+        }
+    }
+    if ('startContainer' in inputRange) {
+        editContenteditable(instance, element, inputRange, data, inputType);
+    } else {
+        editInputElement(instance, element, inputRange, data, inputType);
+    }
+}
+function editContenteditable(instance, element, inputRange, data, inputType) {
+    let del = false;
+    if (!inputRange.collapsed) {
+        del = true;
+        inputRange.deleteContents();
+    } else if ([
+        'deleteContentBackward',
+        'deleteContentForward'
+    ].includes(inputType)) {
+        const nextPosition = cursor.getNextCursorPosition(inputRange.startContainer, inputRange.startOffset, inputType === 'deleteContentBackward' ? -1 : 1, inputType);
+        if (nextPosition) {
+            del = true;
+            const delRange = inputRange.cloneRange();
+            if (delRange.comparePoint(nextPosition.node, nextPosition.offset) < 0) {
+                delRange.setStart(nextPosition.node, nextPosition.offset);
+            } else {
+                delRange.setEnd(nextPosition.node, nextPosition.offset);
+            }
+            delRange.deleteContents();
+        }
+    }
+    if (data) {
+        if (inputRange.endContainer.nodeType === 3) {
+            const offset = inputRange.endOffset;
+            inputRange.endContainer.insertData(offset, data);
+            inputRange.setStart(inputRange.endContainer, offset + data.length);
+            inputRange.setEnd(inputRange.endContainer, offset + data.length);
+        } else {
+            const text = element.ownerDocument.createTextNode(data);
+            inputRange.insertNode(text);
+            inputRange.setStart(text, data.length);
+            inputRange.setEnd(text, data.length);
+        }
+    }
+    if (del || data) {
+        instance.dispatchUIEvent(element, 'input', {
+            inputType
+        });
+    }
+}
+function editInputElement(instance, element, inputRange, data, inputType) {
+    let dataToInsert = data;
+    if (maxLength.supportsMaxLength(element)) {
+        const maxLength$1 = maxLength.getMaxLength(element);
+        if (maxLength$1 !== undefined && data.length > 0) {
+            const spaceUntilMaxLength = maxLength$1 - element.value.length;
+            if (spaceUntilMaxLength > 0) {
+                dataToInsert = data.substring(0, spaceUntilMaxLength);
+            } else {
+                return;
+            }
+        }
+    }
+    const { newValue, newOffset, oldValue } = calculateNewValue(dataToInsert, element, inputRange, inputType);
+    if (newValue === oldValue && newOffset === inputRange.startOffset && newOffset === inputRange.endOffset) {
+        return;
+    }
+    if (isElementType.isElementType(element, 'input', {
+        type: 'number'
+    }) && !isValidNumberInput(newValue)) {
+        return;
+    }
+    UI.setUIValue(element, newValue);
+    setSelection.setSelection({
+        focusNode: element,
+        anchorOffset: newOffset,
+        focusOffset: newOffset
+    });
+    if (isDateOrTime(element)) {
+        if (timeValue.isValidDateOrTimeValue(element, newValue)) {
+            commitInput(instance, element, newOffset, {});
+            instance.dispatchUIEvent(element, 'change');
+            UI.clearInitialValue(element);
+        }
+    } else {
+        commitInput(instance, element, newOffset, {
+            data,
+            inputType
+        });
+    }
+}
+function calculateNewValue(inputData, node, { startOffset, endOffset }, inputType) {
+    const value = UI.getUIValue(node);
+    const prologEnd = Math.max(0, startOffset === endOffset && inputType === 'deleteContentBackward' ? startOffset - 1 : startOffset);
+    const prolog = value.substring(0, prologEnd);
+    const epilogStart = Math.min(value.length, startOffset === endOffset && inputType === 'deleteContentForward' ? startOffset + 1 : endOffset);
+    const epilog = value.substring(epilogStart, value.length);
+    let newValue = `${prolog}${inputData}${epilog}`;
+    let newOffset = prologEnd + inputData.length;
+    if (isElementType.isElementType(node, 'input', {
+        type: 'time'
+    })) {
+        const builtValue = timeValue.buildTimeValue(newValue);
+        if (builtValue !== '' && timeValue.isValidDateOrTimeValue(node, builtValue)) {
+            newValue = builtValue;
+            newOffset = builtValue.length;
+        }
+    }
+    return {
+        oldValue: value,
+        newValue,
+        newOffset
+    };
+}
+function commitInput(instance, element, newOffset, inputInit) {
+    instance.dispatchUIEvent(element, 'input', inputInit);
+    trackValue.commitValueAfterInput(element, newOffset);
+}
+function isValidNumberInput(value) {
+    var _value_match, _value_match1;
+    // the browser allows some invalid input but not others
+    // it allows up to two '-' at any place before any 'e' or one directly following 'e'
+    // it allows one '.' at any place before e
+    const valueParts = value.split('e', 2);
+    return !(/[^\d.\-e]/.test(value) || Number((_value_match = value.match(/-/g)) === null || _value_match === undefined ? undefined : _value_match.length) > 2 || Number((_value_match1 = value.match(/\./g)) === null || _value_match1 === undefined ? undefined : _value_match1.length) > 1 || valueParts[1] && !/^-?\d*$/.test(valueParts[1]));
+}
+
+exports.input = input;

frontend/node_modules/@testing-library/user-event/dist/cjs/event/radio.js

@@ -0,0 +1,27 @@
+'use strict';
+
+require('../utils/dataTransfer/Clipboard.js');
+var isDisabled = require('../utils/misc/isDisabled.js');
+var getWindow = require('../utils/misc/getWindow.js');
+var focus = require('./focus.js');
+
+function walkRadio(instance, el, direction) {
+    const window = getWindow.getWindow(el);
+    const group = Array.from(el.ownerDocument.querySelectorAll(el.name ? `input[type="radio"][name="${window.CSS.escape(el.name)}"]` : `input[type="radio"][name=""], input[type="radio"]:not([name])`));
+    for(let i = group.findIndex((e)=>e === el) + direction;; i += direction){
+        if (!group[i]) {
+            i = direction > 0 ? 0 : group.length - 1;
+        }
+        if (group[i] === el) {
+            return;
+        }
+        if (isDisabled.isDisabled(group[i])) {
+            continue;
+        }
+        focus.focusElement(group[i]);
+        instance.dispatchUIEvent(group[i], 'click');
+        return;
+    }
+}
+
+exports.walkRadio = walkRadio;

frontend/node_modules/@testing-library/user-event/dist/cjs/event/selection/getInputRange.js

@@ -0,0 +1,18 @@
+'use strict';
+
+var getTargetTypeAndSelection = require('./getTargetTypeAndSelection.js');
+
+/**
+ * Get the range that would be overwritten by input.
+ */ function getInputRange(focusNode) {
+    const typeAndSelection = getTargetTypeAndSelection.getTargetTypeAndSelection(focusNode);
+    if (typeAndSelection.type === 'input') {
+        return typeAndSelection.selection;
+    } else if (typeAndSelection.type === 'contenteditable') {
+        var _typeAndSelection_selection;
+        // Multi-range on contenteditable edits the first selection instead of the last
+        return (_typeAndSelection_selection = typeAndSelection.selection) === null || _typeAndSelection_selection === undefined ? undefined : _typeAndSelection_selection.getRangeAt(0);
+    }
+}
+
+exports.getInputRange = getInputRange;

frontend/node_modules/@testing-library/user-event/dist/cjs/event/selection/getTargetTypeAndSelection.js

@@ -0,0 +1,31 @@
+'use strict';
+
+var UI = require('../../document/UI.js');
+require('../../utils/dataTransfer/Clipboard.js');
+var isContentEditable = require('../../utils/edit/isContentEditable.js');
+var selection = require('../../utils/focus/selection.js');
+
+/**
+ * Determine which selection logic and selection ranges to consider.
+ */ function getTargetTypeAndSelection(node) {
+    const element = getElement(node);
+    if (element && selection.hasOwnSelection(element)) {
+        return {
+            type: 'input',
+            selection: UI.getUISelection(element)
+        };
+    }
+    const selection$1 = element === null || element === undefined ? undefined : element.ownerDocument.getSelection();
+    // It is possible to extend a single-range selection into a contenteditable.
+    // This results in the range acting like a range outside of contenteditable.
+    const isCE = isContentEditable.getContentEditable(node) && (selection$1 === null || selection$1 === undefined ? undefined : selection$1.anchorNode) && isContentEditable.getContentEditable(selection$1.anchorNode);
+    return {
+        type: isCE ? 'contenteditable' : 'default',
+        selection: selection$1
+    };
+}
+function getElement(node) {
+    return node.nodeType === 1 ? node : node.parentElement;
+}
+
+exports.getTargetTypeAndSelection = getTargetTypeAndSelection;

frontend/node_modules/@testing-library/user-event/dist/cjs/event/selection/index.js

@@ -0,0 +1,24 @@
+'use strict';
+
+var getInputRange = require('./getInputRange.js');
+var modifySelection = require('./modifySelection.js');
+var moveSelection = require('./moveSelection.js');
+var setSelectionPerMouse = require('./setSelectionPerMouse.js');
+var modifySelectionPerMouse = require('./modifySelectionPerMouse.js');
+var selectAll = require('./selectAll.js');
+var setSelectionRange = require('./setSelectionRange.js');
+var setSelection = require('./setSelection.js');
+var updateSelectionOnFocus = require('./updateSelectionOnFocus.js');
+
+
+
+exports.getInputRange = getInputRange.getInputRange;
+exports.modifySelection = modifySelection.modifySelection;
+exports.moveSelection = moveSelection.moveSelection;
+exports.setSelectionPerMouseDown = setSelectionPerMouse.setSelectionPerMouseDown;
+exports.modifySelectionPerMouseMove = modifySelectionPerMouse.modifySelectionPerMouseMove;
+exports.isAllSelected = selectAll.isAllSelected;
+exports.selectAll = selectAll.selectAll;
+exports.setSelectionRange = setSelectionRange.setSelectionRange;
+exports.setSelection = setSelection.setSelection;
+exports.updateSelectionOnFocus = updateSelectionOnFocus.updateSelectionOnFocus;

frontend/node_modules/@testing-library/user-event/dist/cjs/event/selection/modifySelection.js

@@ -0,0 +1,21 @@
+'use strict';
+
+var UI = require('../../document/UI.js');
+require('../../utils/dataTransfer/Clipboard.js');
+var getTargetTypeAndSelection = require('./getTargetTypeAndSelection.js');
+
+/**
+ * Extend/shrink the selection like with Shift+Arrows or Shift+Mouse
+ */ function modifySelection({ focusNode, focusOffset }) {
+    var _focusNode_ownerDocument_getSelection, _focusNode_ownerDocument;
+    const typeAndSelection = getTargetTypeAndSelection.getTargetTypeAndSelection(focusNode);
+    if (typeAndSelection.type === 'input') {
+        return UI.setUISelection(focusNode, {
+            anchorOffset: typeAndSelection.selection.anchorOffset,
+            focusOffset
+        }, 'modify');
+    }
+    (_focusNode_ownerDocument = focusNode.ownerDocument) === null || _focusNode_ownerDocument === undefined ? undefined : (_focusNode_ownerDocument_getSelection = _focusNode_ownerDocument.getSelection()) === null || _focusNode_ownerDocument_getSelection === undefined ? undefined : _focusNode_ownerDocument_getSelection.extend(focusNode, focusOffset);
+}
+
+exports.modifySelection = modifySelection;

frontend/node_modules/@testing-library/user-event/dist/cjs/event/selection/modifySelectionPerMouse.js

@@ -0,0 +1,40 @@
+'use strict';
+
+var UI = require('../../document/UI.js');
+require('../../utils/dataTransfer/Clipboard.js');
+var resolveCaretPosition = require('./resolveCaretPosition.js');
+
+function modifySelectionPerMouseMove(selectionRange, { document, target, node, offset }) {
+    const selectionFocus = resolveCaretPosition.resolveCaretPosition({
+        target,
+        node,
+        offset
+    });
+    if ('node' in selectionRange) {
+        // When the mouse is dragged outside of an input/textarea,
+        // the selection is extended to the beginning or end of the input
+        // depending on pointer position.
+        // TODO: extend selection according to pointer position
+        /* istanbul ignore else */ if (selectionFocus.node === selectionRange.node) {
+            const anchorOffset = selectionFocus.offset < selectionRange.start ? selectionRange.end : selectionRange.start;
+            const focusOffset = selectionFocus.offset > selectionRange.end || selectionFocus.offset < selectionRange.start ? selectionFocus.offset : selectionRange.end;
+            UI.setUISelection(selectionRange.node, {
+                anchorOffset,
+                focusOffset
+            });
+        }
+    } else {
+        const range = selectionRange.cloneRange();
+        const cmp = range.comparePoint(selectionFocus.node, selectionFocus.offset);
+        if (cmp < 0) {
+            range.setStart(selectionFocus.node, selectionFocus.offset);
+        } else if (cmp > 0) {
+            range.setEnd(selectionFocus.node, selectionFocus.offset);
+        }
+        const selection = document.getSelection();
+        selection === null || selection === undefined ? undefined : selection.removeAllRanges();
+        selection === null || selection === undefined ? undefined : selection.addRange(range.cloneRange());
+    }
+}
+
+exports.modifySelectionPerMouseMove = modifySelectionPerMouseMove;

frontend/node_modules/@testing-library/user-event/dist/cjs/event/selection/moveSelection.js

@@ -0,0 +1,38 @@
+'use strict';
+
+var UI = require('../../document/UI.js');
+require('../../utils/dataTransfer/Clipboard.js');
+var cursor = require('../../utils/focus/cursor.js');
+var selection = require('../../utils/focus/selection.js');
+var setSelection = require('./setSelection.js');
+
+/**
+ * Move the selection
+ */ function moveSelection(node, direction) {
+    // TODO: implement shift
+    if (selection.hasOwnSelection(node)) {
+        const selection = UI.getUISelection(node);
+        setSelection.setSelection({
+            focusNode: node,
+            focusOffset: selection.startOffset === selection.endOffset ? selection.focusOffset + direction : direction < 0 ? selection.startOffset : selection.endOffset
+        });
+    } else {
+        const selection = node.ownerDocument.getSelection();
+        if (!(selection === null || selection === undefined ? undefined : selection.focusNode)) {
+            return;
+        }
+        if (selection.isCollapsed) {
+            const nextPosition = cursor.getNextCursorPosition(selection.focusNode, selection.focusOffset, direction);
+            if (nextPosition) {
+                setSelection.setSelection({
+                    focusNode: nextPosition.node,
+                    focusOffset: nextPosition.offset
+                });
+            }
+        } else {
+            selection[direction < 0 ? 'collapseToStart' : 'collapseToEnd']();
+        }
+    }
+}
+
+exports.moveSelection = moveSelection;

frontend/node_modules/@testing-library/user-event/dist/cjs/event/selection/resolveCaretPosition.js

@@ -0,0 +1,61 @@
+'use strict';
+
+var UI = require('../../document/UI.js');
+require('../../utils/dataTransfer/Clipboard.js');
+var selection = require('../../utils/focus/selection.js');
+
+function resolveCaretPosition({ target, node, offset }) {
+    if (selection.hasOwnSelection(target)) {
+        return {
+            node: target,
+            offset: offset !== null && offset !== undefined ? offset : UI.getUIValue(target).length
+        };
+    } else if (node) {
+        return {
+            node,
+            offset: offset !== null && offset !== undefined ? offset : node.nodeType === 3 ? node.nodeValue.length : node.childNodes.length
+        };
+    }
+    return findNodeAtTextOffset(target, offset);
+}
+function findNodeAtTextOffset(node, offset, isRoot = true) {
+    // When clicking after the content the browser behavior can be complicated:
+    // 1. If there is textContent after the last element child,
+    // the cursor is moved there.
+    // 2. If there is textContent in the last element child,
+    // the browser moves the cursor to the last non-empty text node inside this element.
+    // 3. Otherwise the cursor is moved to the end of the target.
+    let i = offset === undefined ? node.childNodes.length - 1 : 0;
+    const step = offset === undefined ? -1 : 1;
+    while(offset === undefined ? i >= (isRoot ? Math.max(node.childNodes.length - 1, 0) : 0) : i <= node.childNodes.length){
+        if (offset && i === node.childNodes.length) {
+            throw new Error('The given offset is out of bounds.');
+        }
+        const c = node.childNodes.item(i);
+        const text = String(c.textContent);
+        if (text.length) {
+            if (offset !== undefined && text.length < offset) {
+                offset -= text.length;
+            } else if (c.nodeType === 1) {
+                return findNodeAtTextOffset(c, offset, false);
+            } else {
+                // The pre-commit hooks keeps changing this
+                // See https://github.com/kentcdodds/kcd-scripts/issues/218
+                /* istanbul ignore else */ // eslint-disable-next-line no-lonely-if
+                if (c.nodeType === 3) {
+                    return {
+                        node: c,
+                        offset: offset !== null && offset !== undefined ? offset : c.nodeValue.length
+                    };
+                }
+            }
+        }
+        i += step;
+    }
+    return {
+        node,
+        offset: node.childNodes.length
+    };
+}
+
+exports.resolveCaretPosition = resolveCaretPosition;

frontend/node_modules/@testing-library/user-event/dist/cjs/event/selection/selectAll.js

@@ -0,0 +1,38 @@
+'use strict';
+
+var UI = require('../../document/UI.js');
+require('../../utils/dataTransfer/Clipboard.js');
+var isContentEditable = require('../../utils/edit/isContentEditable.js');
+var selection = require('../../utils/focus/selection.js');
+var setSelection = require('./setSelection.js');
+
+/**
+ * Expand a selection like the browser does when pressing Ctrl+A.
+ */ function selectAll(target) {
+    if (selection.hasOwnSelection(target)) {
+        return setSelection.setSelection({
+            focusNode: target,
+            anchorOffset: 0,
+            focusOffset: UI.getUIValue(target).length
+        });
+    }
+    var _getContentEditable;
+    const focusNode = (_getContentEditable = isContentEditable.getContentEditable(target)) !== null && _getContentEditable !== undefined ? _getContentEditable : target.ownerDocument.body;
+    setSelection.setSelection({
+        focusNode,
+        anchorOffset: 0,
+        focusOffset: focusNode.childNodes.length
+    });
+}
+function isAllSelected(target) {
+    if (selection.hasOwnSelection(target)) {
+        return UI.getUISelection(target).startOffset === 0 && UI.getUISelection(target).endOffset === UI.getUIValue(target).length;
+    }
+    var _getContentEditable;
+    const focusNode = (_getContentEditable = isContentEditable.getContentEditable(target)) !== null && _getContentEditable !== undefined ? _getContentEditable : target.ownerDocument.body;
+    const selection$1 = target.ownerDocument.getSelection();
+    return (selection$1 === null || selection$1 === undefined ? undefined : selection$1.anchorNode) === focusNode && selection$1.focusNode === focusNode && selection$1.anchorOffset === 0 && selection$1.focusOffset === focusNode.childNodes.length;
+}
+
+exports.isAllSelected = isAllSelected;
+exports.selectAll = selectAll;

frontend/node_modules/@testing-library/user-event/dist/cjs/event/selection/setSelection.js

@@ -0,0 +1,21 @@
+'use strict';
+
+var UI = require('../../document/UI.js');
+require('../../utils/dataTransfer/Clipboard.js');
+var getTargetTypeAndSelection = require('./getTargetTypeAndSelection.js');
+
+/**
+ * Set the selection
+ */ function setSelection({ focusNode, focusOffset, anchorNode = focusNode, anchorOffset = focusOffset }) {
+    var _anchorNode_ownerDocument_getSelection, _anchorNode_ownerDocument;
+    const typeAndSelection = getTargetTypeAndSelection.getTargetTypeAndSelection(focusNode);
+    if (typeAndSelection.type === 'input') {
+        return UI.setUISelection(focusNode, {
+            anchorOffset,
+            focusOffset
+        });
+    }
+    (_anchorNode_ownerDocument = anchorNode.ownerDocument) === null || _anchorNode_ownerDocument === undefined ? undefined : (_anchorNode_ownerDocument_getSelection = _anchorNode_ownerDocument.getSelection()) === null || _anchorNode_ownerDocument_getSelection === undefined ? undefined : _anchorNode_ownerDocument_getSelection.setBaseAndExtent(anchorNode, anchorOffset, focusNode, focusOffset);
+}
+
+exports.setSelection = setSelection;

frontend/node_modules/@testing-library/user-event/dist/cjs/event/selection/setSelectionPerMouse.js

@@ -0,0 +1,81 @@
+'use strict';
+
+var UI = require('../../document/UI.js');
+require('../../utils/dataTransfer/Clipboard.js');
+var selection = require('../../utils/focus/selection.js');
+var resolveCaretPosition = require('./resolveCaretPosition.js');
+
+function setSelectionPerMouseDown({ document, target, clickCount, node, offset }) {
+    if (selection.hasNoSelection(target)) {
+        return;
+    }
+    const targetHasOwnSelection = selection.hasOwnSelection(target);
+    // On non-input elements the text selection per multiple click
+    // can extend beyond the target boundaries.
+    // The exact mechanism what is considered in the same line is unclear.
+    // Looks it might be every inline element.
+    // TODO: Check what might be considered part of the same line of text.
+    const text = String(targetHasOwnSelection ? UI.getUIValue(target) : target.textContent);
+    const [start, end] = node ? // which elements might be considered in the same line of text.
+    // TODO: support expanding initial range on multiple clicks if node is given
+    [
+        offset,
+        offset
+    ] : getTextRange(text, offset, clickCount);
+    // TODO: implement modifying selection per shift/ctrl+mouse
+    if (targetHasOwnSelection) {
+        UI.setUISelection(target, {
+            anchorOffset: start !== null && start !== undefined ? start : text.length,
+            focusOffset: end !== null && end !== undefined ? end : text.length
+        });
+        return {
+            node: target,
+            start: start !== null && start !== undefined ? start : 0,
+            end: end !== null && end !== undefined ? end : text.length
+        };
+    } else {
+        const { node: startNode, offset: startOffset } = resolveCaretPosition.resolveCaretPosition({
+            target,
+            node,
+            offset: start
+        });
+        const { node: endNode, offset: endOffset } = resolveCaretPosition.resolveCaretPosition({
+            target,
+            node,
+            offset: end
+        });
+        const range = target.ownerDocument.createRange();
+        try {
+            range.setStart(startNode, startOffset);
+            range.setEnd(endNode, endOffset);
+        } catch (e) {
+            throw new Error('The given offset is out of bounds.');
+        }
+        const selection = document.getSelection();
+        selection === null || selection === undefined ? undefined : selection.removeAllRanges();
+        selection === null || selection === undefined ? undefined : selection.addRange(range.cloneRange());
+        return range;
+    }
+}
+function getTextRange(text, pos, clickCount) {
+    if (clickCount % 3 === 1 || text.length === 0) {
+        return [
+            pos,
+            pos
+        ];
+    }
+    const textPos = pos !== null && pos !== undefined ? pos : text.length;
+    if (clickCount % 3 === 2) {
+        return [
+            textPos - text.substr(0, pos).match(/(\w+|\s+|\W)?$/)[0].length,
+            pos === undefined ? pos : pos + text.substr(pos).match(/^(\w+|\s+|\W)?/)[0].length
+        ];
+    }
+    // triple click
+    return [
+        textPos - text.substr(0, pos).match(/[^\r\n]*$/)[0].length,
+        pos === undefined ? pos : pos + text.substr(pos).match(/^[^\r\n]*/)[0].length
+    ];
+}
+
+exports.setSelectionPerMouseDown = setSelectionPerMouseDown;

frontend/node_modules/@testing-library/user-event/dist/cjs/event/selection/setSelectionRange.js

@@ -0,0 +1,31 @@
+'use strict';
+
+require('../../utils/dataTransfer/Clipboard.js');
+var isContentEditable = require('../../utils/edit/isContentEditable.js');
+var selection = require('../../utils/focus/selection.js');
+var setSelection = require('./setSelection.js');
+
+/**
+ * Backward-compatible selection.
+ *
+ * Handles input elements and contenteditable if it only contains a single text node.
+ */ function setSelectionRange(element, anchorOffset, focusOffset) {
+    var _element_firstChild;
+    if (selection.hasOwnSelection(element)) {
+        return setSelection.setSelection({
+            focusNode: element,
+            anchorOffset,
+            focusOffset
+        });
+    }
+    /* istanbul ignore else */ if (isContentEditable.isContentEditable(element) && ((_element_firstChild = element.firstChild) === null || _element_firstChild === undefined ? undefined : _element_firstChild.nodeType) === 3) {
+        return setSelection.setSelection({
+            focusNode: element.firstChild,
+            anchorOffset,
+            focusOffset
+        });
+    }
+    /* istanbul ignore next */ throw new Error('Not implemented. The result of this interaction is unreliable.');
+}
+
+exports.setSelectionRange = setSelectionRange;

frontend/node_modules/@testing-library/user-event/dist/cjs/event/selection/updateSelectionOnFocus.js

@@ -0,0 +1,40 @@
+'use strict';
+
+require('../../utils/dataTransfer/Clipboard.js');
+var isContentEditable = require('../../utils/edit/isContentEditable.js');
+var selection = require('../../utils/focus/selection.js');
+
+// The browser implementation seems to have changed.
+// When focus is inside <input type="text"/>,
+// Chrome updates Selection to be collapsed at the position of the input element.
+// TODO: update implementation to match that of current browsers
+/**
+ * Reset the Document Selection when moving focus into an element
+ * with own selection implementation.
+ */ function updateSelectionOnFocus(element) {
+    const selection$1 = element.ownerDocument.getSelection();
+    /* istanbul ignore if */ if (!(selection$1 === null || selection$1 === undefined ? undefined : selection$1.focusNode)) {
+        return;
+    }
+    // If the focus moves inside an element with own selection implementation,
+    // the document selection will be this element.
+    // But if the focused element is inside a contenteditable,
+    // 1) a collapsed selection will be retained.
+    // 2) other selections will be replaced by a cursor
+    //  2.a) at the start of the first child if it is a text node
+    //  2.b) at the start of the contenteditable.
+    if (selection.hasOwnSelection(element)) {
+        const contenteditable = isContentEditable.getContentEditable(selection$1.focusNode);
+        if (contenteditable) {
+            if (!selection$1.isCollapsed) {
+                var _contenteditable_firstChild;
+                const focusNode = ((_contenteditable_firstChild = contenteditable.firstChild) === null || _contenteditable_firstChild === undefined ? undefined : _contenteditable_firstChild.nodeType) === 3 ? contenteditable.firstChild : contenteditable;
+                selection$1.setBaseAndExtent(focusNode, 0, focusNode, 0);
+            }
+        } else {
+            selection$1.setBaseAndExtent(element, 0, element, 0);
+        }
+    }
+}
+
+exports.updateSelectionOnFocus = updateSelectionOnFocus;

frontend/node_modules/@testing-library/user-event/dist/cjs/event/types.js

@@ -0,0 +1,2 @@
+'use strict';
+

frontend/node_modules/@testing-library/user-event/dist/cjs/event/wrapEvent.js

@@ -0,0 +1,9 @@
+'use strict';
+
+var dom = require('@testing-library/dom');
+
+function wrapEvent(cb, _element) {
+    return dom.getConfig().eventWrapper(cb);
+}
+
+exports.wrapEvent = wrapEvent;