feat: Reinitialize frontend with SvelteKit and TypeScript

- Delete old Vite+Svelte frontend
- Initialize new SvelteKit project with TypeScript
- Configure Tailwind CSS v4 + DaisyUI
- Implement JWT authentication with auto-refresh
- Create login page with form validation (Zod)
- Add protected route guards
- Update Docker configuration for single-stage build
- Add E2E tests with Playwright (6/11 passing)
- Fix Svelte 5 reactivity with $state() runes

Known issues:
- 5 E2E tests failing (timing/async issues)
- Token refresh implementation needs debugging
- Validation error display timing

frontend/node_modules/@testing-library/svelte-core/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2019 Ben Monro <ben.monro@gmail.com> (https://github.com/benmonro)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

frontend/node_modules/@testing-library/svelte-core/README.md

@@ -0,0 +1,184 @@
+# @testing-library/svelte-core
+
+Do you want to build your own Svelte testing library? You may want to use our
+rendering core, which abstracts away differences in Svelte versions to provide a
+simple API to render Svelte components into the document and clean them up
+afterwards.
+
+## Table of Contents
+
+- [Example Usage](#example-usage)
+- [API](#api)
+  - [`render`](#render)
+  - [`setup`](#setup)
+  - [`mount`](#mount)
+  - [`cleanup`](#cleanup)
+  - [`addCleanupTask`](#addcleanuptask)
+  - [`removeCleanupTask`](#removecleanuptask)
+  - [Utility types](#utility-types)
+
+## Example Usage
+
+```ts
+import { beforeEach } from 'vitest'
+import * as SvelteCore from '@testing-library/svelte-core'
+import type {
+  Component,
+  Exports,
+  Rerender,
+} from '@testing-library/svelte-core/types'
+
+import { bindQueries, type Queries } from './bring-your-own-queries.js'
+
+beforeEach(() => {
+  SvelteCore.cleanup()
+})
+
+export interface RenderResult<C extends Component> extends Queries {
+  container: HTMLElement
+  component: Exports<C>
+  rerender: Rerender<C>
+  unmount: () => void
+}
+
+export const render = <C extends SvelteCore.Component>(
+  Component: SvelteCore.ComponentImport<C>,
+  options: SvelteCore.ComponentOptions<C>
+): RenderResult<C> => {
+  const { baseElement, component, container, rerender, unmount } =
+    SvelteCore.render(Component, options)
+
+  const queries = bindQueries(baseElement)
+
+  return { component, container, rerender, unmount, ...queries }
+}
+```
+
+## API
+
+### `render`
+
+Set up the document and mount a component into that document.
+
+```ts
+const { baseElement, container, component, rerender, unmount } = render(
+  Component,
+  componentOptions,
+  setupOptions
+)
+```
+
+| Argument           | Type                                                    | Description                                   |
+| ------------------ | ------------------------------------------------------- | --------------------------------------------- |
+| `Component`        | [Svelte component][svelte-component-docs]               | An imported Svelte component                  |
+| `componentOptions` | `Props` or partial [`mount` options][svelte-mount-docs] | Options for how the component will be mounted |
+| `setupOptions`     | `{ baseElement?: HTMLElement }`                         | Optionally override `baseElement`             |
+
+| Result        | Type                                       | Description                              | Default                             |
+| ------------- | ------------------------------------------ | ---------------------------------------- | ----------------------------------- |
+| `baseElement` | `HTMLElement`                              | The base element                         | `document.body`                     |
+| `container`   | `HTMLElement`                              | The component's immediate parent element | `<div>` appended to `document.body` |
+| `component`   | [component exports][svelte-mount-docs]     | The component's exports from `mount`     | N/A                                 |
+| `rerender`    | `(props: Partial<Props>) => Promise<void>` | Update the component's props             | N/A                                 |
+| `unmount`     | `() => void`                               | Unmount the component from the document  | N/A                                 |
+
+> \[!TIP]
+> Calling `render` is equivalent to calling [`setup`](#setup) followed by [`mount`](#mount)
+>
+> ```ts
+> const { baseElement, container, mountOptions } = setup(
+>   componentOptions,
+>   setupOptions
+> )
+> const { component, rerender, unmount } = mount(Component, mountOptions)
+> ```
+
+[svelte-component-docs]: https://svelte.dev/docs/svelte-components
+[svelte-mount-docs]: https://svelte.dev/docs/svelte/imperative-component-api#mount
+
+### `setup`
+
+Validate options and prepare document elements for rendering.
+
+```ts
+const { baseElement, container, mountOptions } = setup(
+  componentOptions,
+  setupOptions
+)
+```
+
+| Argument           | Type                                                    | Description                                   |
+| ------------------ | ------------------------------------------------------- | --------------------------------------------- |
+| `componentOptions` | `Props` or partial [`mount` options][svelte-mount-docs] | Options for how the component will be mounted |
+| `setupOptions`     | `{ baseElement?: HTMLElement }`                         | Optionally override `baseElement`             |
+
+| Result         | Type                                 | Description                              | Default                             |
+| -------------- | ------------------------------------ | ---------------------------------------- | ----------------------------------- |
+| `baseElement`  | `HTMLElement`                        | The base element                         | `document.body`                     |
+| `container`    | `HTMLElement`                        | The component's immediate parent element | `<div>` appended to `document.body` |
+| `mountOptions` | [`mount` options][svelte-mount-docs] | Validated options to pass to `mount`     | `{ target, props: {} }`             |
+
+### `mount`
+
+Mount a Svelte component into the document.
+
+```ts
+const { component, unmount, rerender } = mount(Component, mountOptions)
+```
+
+| Argument       | Type                                      | Description                                  |
+| -------------- | ----------------------------------------- | -------------------------------------------- |
+| `Component`    | [Svelte component][svelte-component-docs] | An imported Svelte component                 |
+| `mountOptions` | [component options][svelte-mount-docs]    | Options to pass to Svelte's `mount` function |
+
+| Result      | Type                                       | Description                             |
+| ----------- | ------------------------------------------ | --------------------------------------- |
+| `component` | [component exports][svelte-mount-docs]     | The component's exports from `mount`    |
+| `unmount`   | `() => void`                               | Unmount the component from the document |
+| `rerender`  | `(props: Partial<Props>) => Promise<void>` | Update the component's props            |
+
+### `cleanup`
+
+Cleanup rendered components and added elements. Call this when your tests are
+over.
+
+```ts
+cleanup()
+```
+
+### `addCleanupTask`
+
+Add a custom cleanup task to be called with `cleanup()`
+
+```ts
+addCleanupTask(() => {
+  // ...reset something
+})
+```
+
+### `removeCleanupTask`
+
+Remove a cleanup task from `cleanup()`. Useful if a cleanup task can only be run
+once and may be run outside of `cleanup`
+
+```ts
+const customCleanup = () => {
+  // ...reset something
+}
+
+addCleanupTask(customCleanup)
+
+const manuallyCleanupEarly = () => {
+  customCleanup()
+  removeCleanupTask(customCleanup)
+}
+```
+
+### Utility types
+
+This module exports various utility types from
+`@testing-library/svelte-core/types`. They adapt to whatever Svelte version is
+installed, and can be used to get type signatures for imported components,
+props, exports, etc.
+
+See [`./types.d.ts`](./types.d.ts) for the full list of available types.

frontend/node_modules/@testing-library/svelte-core/dist/cleanup.d.ts

@@ -0,0 +1,15 @@
+/**
+ * Register later cleanup task
+ *
+ * @param {() => void} onCleanup
+ */
+export function addCleanupTask(onCleanup: () => void): () => void;
+/** Clean up all components and elements added to the document. */
+export function cleanup(): void;
+/**
+ * Remove a cleanup task without running it.
+ *
+ * @param {() => void} onCleanup
+ */
+export function removeCleanupTask(onCleanup: () => void): void;
+//# sourceMappingURL=cleanup.d.ts.map

frontend/node_modules/@testing-library/svelte-core/dist/cleanup.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"cleanup.d.ts","sourceRoot":"","sources":["../src/cleanup.js"],"names":[],"mappings":"AAGA;;;;GAIG;AACH,0CAFW,MAAM,IAAI,SAAJ,IAAI,CAKpB;AAWD,kEAAkE;AAClE,gCAMC;AAhBD;;;;GAIG;AACH,6CAFW,MAAM,IAAI,QAIpB"}

frontend/node_modules/@testing-library/svelte-core/dist/index.d.ts

@@ -0,0 +1,5 @@
+export * from "./cleanup.js";
+export * from "./mount.js";
+export * from "./render.js";
+export * from "./setup.js";
+//# sourceMappingURL=index.d.ts.map

frontend/node_modules/@testing-library/svelte-core/dist/index.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"index.d.ts","sourceRoot":"","sources":["../src/index.js"],"names":[],"mappings":""}

frontend/node_modules/@testing-library/svelte-core/dist/mount.d.ts

@@ -0,0 +1,10 @@
+/**
+ * Render a Svelte component into the document.
+ *
+ * @template {import('../types.js').Component} C
+ * @param {import('../types.js').ComponentImport<C>} Component
+ * @param {import('../types.js').MountOptions<C>} options
+ * @returns {import('../types.js').MountResult<C>}
+ */
+export function mount<C extends import("../types.js").Component>(Component: import("../types.js").ComponentImport<C>, options: import("../types.js").MountOptions<C>): import("../types.js").MountResult<C>;
+//# sourceMappingURL=mount.d.ts.map

frontend/node_modules/@testing-library/svelte-core/dist/mount.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"mount.d.ts","sourceRoot":"","sources":["../src/mount.js"],"names":[],"mappings":"AA2EA;;;;;;;GAOG;AACH,sBAL+C,CAAC,SAAnC,OAAQ,aAAa,EAAE,SAAU,aACnC,OAAO,aAAa,EAAE,eAAe,CAAC,CAAC,CAAC,WACxC,OAAO,aAAa,EAAE,YAAY,CAAC,CAAC,CAAC,GACnC,OAAO,aAAa,EAAE,WAAW,CAAC,CAAC,CAAC,CAwBhD"}

frontend/node_modules/@testing-library/svelte-core/dist/props.svelte.d.ts

@@ -0,0 +1,12 @@
+/**
+ * Create a shallowly reactive props object.
+ *
+ * This allows us to update props on `rerender`
+ * without turing `props` into a deep set of Proxy objects
+ *
+ * @template {Record<string, unknown>} Props
+ * @param {Props} initialProps
+ * @returns {[Props, (nextProps: Partial<Props>) => void]}
+ */
+export function createProps<Props extends Record<string, unknown>>(initialProps?: Props): [Props, (nextProps: Partial<Props>) => void];
+//# sourceMappingURL=props.svelte.d.ts.map

frontend/node_modules/@testing-library/svelte-core/dist/props.svelte.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"props.svelte.d.ts","sourceRoot":"","sources":["../src/props.svelte.js"],"names":[],"mappings":"AAAA;;;;;;;;;GASG;AACH,4BAJuC,KAAK,SAA9B,MAAM,CAAC,MAAM,EAAE,OAAO,CAAE,iBAC3B,KAAK,GACH,CAAC,KAAK,EAAE,CAAC,SAAS,EAAE,OAAO,CAAC,KAAK,CAAC,KAAK,IAAI,CAAC,CA0BxD"}

frontend/node_modules/@testing-library/svelte-core/dist/render.d.ts

@@ -0,0 +1,12 @@
+/**
+ * Render a component into the document.
+ *
+ * @template {import('../types.js').Component} C
+ *
+ * @param {import('../types.js').ComponentImport<C>} Component - The component to render.
+ * @param {import('../types.js').ComponentOptions<C>} componentOptions - Customize how Svelte renders the component.
+ * @param {import('../types.js').SetupOptions} setupOptions - Customize how the document is set up.
+ * @returns {import('../types.js').RenderResult<C>} The rendered component.
+ */
+export function render<C extends import("../types.js").Component>(Component: import("../types.js").ComponentImport<C>, componentOptions: import("../types.js").ComponentOptions<C>, setupOptions?: import("../types.js").SetupOptions): import("../types.js").RenderResult<C>;
+//# sourceMappingURL=render.d.ts.map

frontend/node_modules/@testing-library/svelte-core/dist/render.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"render.d.ts","sourceRoot":"","sources":["../src/render.js"],"names":[],"mappings":"AAGA;;;;;;;;;GASG;AACH,uBAP+C,CAAC,SAAnC,OAAQ,aAAa,EAAE,SAAU,aAEnC,OAAO,aAAa,EAAE,eAAe,CAAC,CAAC,CAAC,oBACxC,OAAO,aAAa,EAAE,gBAAgB,CAAC,CAAC,CAAC,iBACzC,OAAO,aAAa,EAAE,YAAY,GAChC,OAAO,aAAa,EAAE,YAAY,CAAC,CAAC,CAAC,CAOjD"}

frontend/node_modules/@testing-library/svelte-core/dist/setup.d.ts

@@ -0,0 +1,13 @@
+/**
+ * Set up the document to render a component.
+ *
+ * @template {import('../types.js').Component} C
+ * @param {import('../types.js').ComponentOptions<C>} componentOptions - props or mount options
+ * @param {import('../types.js').SetupOptions} setupOptions - base element of the document to bind any queries
+ * @returns {import('../types.js').SetupResult<C>}
+ */
+export function setup<C extends import("../types.js").Component>(componentOptions: import("../types.js").ComponentOptions<C>, setupOptions?: import("../types.js").SetupOptions): import("../types.js").SetupResult<C>;
+export class UnknownSvelteOptionsError extends TypeError {
+    constructor(unknownOptions: any);
+}
+//# sourceMappingURL=setup.d.ts.map

frontend/node_modules/@testing-library/svelte-core/dist/setup.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"setup.d.ts","sourceRoot":"","sources":["../src/setup.js"],"names":[],"mappings":"AAsDA;;;;;;;GAOG;AACH,sBAL+C,CAAC,SAAnC,OAAQ,aAAa,EAAE,SAAU,oBACnC,OAAO,aAAa,EAAE,gBAAgB,CAAC,CAAC,CAAC,iBACzC,OAAO,aAAa,EAAE,YAAY,GAChC,OAAO,aAAa,EAAE,WAAW,CAAC,CAAC,CAAC,CAuBhD;AA1ED;IACE,iCAaC;CACF"}

frontend/node_modules/@testing-library/svelte-core/dist/svelte-version.d.ts

@@ -0,0 +1,3 @@
+/** Whether we're using Svelte >= 5. */
+export const IS_MODERN_SVELTE: boolean;
+//# sourceMappingURL=svelte-version.d.ts.map

frontend/node_modules/@testing-library/svelte-core/dist/svelte-version.d.ts.map

@@ -0,0 +1 @@
+{"version":3,"file":"svelte-version.d.ts","sourceRoot":"","sources":["../src/svelte-version.js"],"names":[],"mappings":"AAGA,uCAAuC;AACvC,uCAA2D"}

frontend/node_modules/@testing-library/svelte-core/package.json

@@ -0,0 +1,48 @@
+{
+  "name": "@testing-library/svelte-core",
+  "version": "1.0.0",
+  "description": "Core rendering and cleanup logic for Svelte testing utilities.",
+  "exports": {
+    ".": {
+      "types": "./dist/index.d.ts",
+      "default": "./src/index.js"
+    },
+    "./types": {
+      "types": "./types.d.ts"
+    }
+  },
+  "type": "module",
+  "license": "MIT",
+  "homepage": "https://github.com/testing-library/svelte-testing-library#readme",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/testing-library/svelte-testing-library.git",
+    "directory": "packages/svelte-core"
+  },
+  "bugs": {
+    "url": "https://github.com/testing-library/svelte-testing-library/issues"
+  },
+  "engines": {
+    "node": ">=16"
+  },
+  "keywords": [
+    "tdd",
+    "svelte",
+    "ui",
+    "unit",
+    "component",
+    "functional"
+  ],
+  "files": [
+    "dist",
+    "src",
+    "types.d.ts"
+  ],
+  "peerDependencies": {
+    "svelte": "^3 || ^4 || ^5 || ^5.0.0-next.0"
+  },
+  "publishConfig": {
+    "access": "public",
+    "provenance": true
+  }
+}

frontend/node_modules/@testing-library/svelte-core/src/cleanup.js

@@ -0,0 +1,32 @@
+/** @type {Set<() => void>} */
+const cleanupTasks = new Set()
+
+/**
+ * Register later cleanup task
+ *
+ * @param {() => void} onCleanup
+ */
+const addCleanupTask = (onCleanup) => {
+  cleanupTasks.add(onCleanup)
+  return onCleanup
+}
+
+/**
+ * Remove a cleanup task without running it.
+ *
+ * @param {() => void} onCleanup
+ */
+const removeCleanupTask = (onCleanup) => {
+  cleanupTasks.delete(onCleanup)
+}
+
+/** Clean up all components and elements added to the document. */
+const cleanup = () => {
+  for (const handleCleanup of cleanupTasks.values()) {
+    handleCleanup()
+  }
+
+  cleanupTasks.clear()
+}
+
+export { addCleanupTask, cleanup, removeCleanupTask }

frontend/node_modules/@testing-library/svelte-core/src/index.js

@@ -0,0 +1,11 @@
+/**
+ * Rendering core for svelte-testing-library.
+ *
+ * Defines how components are added to and removed from the DOM.
+ * Will switch to legacy, class-based mounting logic
+ * if it looks like we're in a Svelte <= 4 environment.
+ */
+export * from './cleanup.js'
+export * from './mount.js'
+export * from './render.js'
+export * from './setup.js'

frontend/node_modules/@testing-library/svelte-core/src/mount.js

@@ -0,0 +1,108 @@
+/**
+ * Component rendering core, with support for Svelte 3, 4, and 5
+ */
+import * as Svelte from 'svelte'
+
+import { addCleanupTask, removeCleanupTask } from './cleanup.js'
+import { createProps } from './props.svelte.js'
+import { IS_MODERN_SVELTE } from './svelte-version.js'
+
+/**
+ * Mount a modern Svelte 5 component into the DOM.
+ *
+ * @template {import('../types.js').Component} C
+ * @param {import('../types.js').ComponentType<C>} Component
+ * @param {import('../types.js').MountOptions<C>} options
+ * @returns {import('../types.js').MountResult<C>}
+ */
+const mountModern = (Component, options) => {
+  const [props, updateProps] = createProps(options.props)
+  const component = Svelte.mount(Component, { ...options, props })
+
+  /** Remove the component from the DOM. */
+  const unmount = () => {
+    Svelte.flushSync(() => Svelte.unmount(component))
+    removeCleanupTask(unmount)
+  }
+
+  /** Update the component's props. */
+  const rerender = (nextProps) => {
+    Svelte.flushSync(() => updateProps(nextProps))
+  }
+
+  addCleanupTask(unmount)
+  Svelte.flushSync()
+
+  return { component, unmount, rerender }
+}
+
+/**
+ * Mount a legacy Svelte 3 or 4 component into the DOM.
+ *
+ * @template {import('../types.js').LegacyComponent} C
+ * @param {import('../types.js').ComponentType<C>} Component
+ * @param {import('../types.js').MountOptions<C>} options
+ * @returns {import('../types.js').MountResult<C>}
+ */
+const mountLegacy = (Component, options) => {
+  const component = new Component(options)
+
+  /** Remove the component from the DOM. */
+  const unmount = () => {
+    component.$destroy()
+    removeCleanupTask(unmount)
+  }
+
+  /** Update the component's props. */
+  const rerender = (nextProps) => {
+    component.$set(nextProps)
+  }
+
+  // This `$$.on_destroy` listener is included for strict backwards compatibility
+  // with previous versions of `@testing-library/svelte`.
+  // It's unnecessary and will be removed in a future major version.
+  component.$$.on_destroy.push(() => {
+    removeCleanupTask(unmount)
+  })
+
+  addCleanupTask(unmount)
+
+  return { component, unmount, rerender }
+}
+
+/** The mount method in use. */
+const mountComponent = IS_MODERN_SVELTE ? mountModern : mountLegacy
+
+/**
+ * Render a Svelte component into the document.
+ *
+ * @template {import('../types.js').Component} C
+ * @param {import('../types.js').ComponentImport<C>} Component
+ * @param {import('../types.js').MountOptions<C>} options
+ * @returns {import('../types.js').MountResult<C>}
+ */
+const mount = (Component, options) => {
+  const { component, unmount, rerender } = mountComponent(
+    'default' in Component ? Component.default : Component,
+    options
+  )
+
+  return {
+    component,
+    unmount,
+    rerender: async (props) => {
+      if ('props' in props) {
+        console.warn(
+          'rerender({ props: { ... } }) deprecated, use rerender({ ... }) instead'
+        )
+        props = props.props
+      }
+
+      rerender(props)
+      // Await the next tick for Svelte 3/4, which cannot flush changes synchronously
+      await Svelte.tick()
+    },
+  }
+}
+
+export { mount }

frontend/node_modules/@testing-library/svelte-core/src/props.svelte.js

@@ -0,0 +1,37 @@
+/**
+ * Create a shallowly reactive props object.
+ *
+ * This allows us to update props on `rerender`
+ * without turing `props` into a deep set of Proxy objects
+ *
+ * @template {Record<string, unknown>} Props
+ * @param {Props} initialProps
+ * @returns {[Props, (nextProps: Partial<Props>) => void]}
+ */
+const createProps = (initialProps = {}) => {
+  let currentProps = $state.raw(initialProps)
+
+  const props = new Proxy(initialProps, {
+    get(_, key) {
+      return currentProps[key]
+    },
+    set(_, key, value) {
+      currentProps[key] = value
+      return true
+    },
+    has(_, key) {
+      return Reflect.has(currentProps, key)
+    },
+    ownKeys() {
+      return Reflect.ownKeys(currentProps)
+    },
+  })
+
+  const update = (nextProps) => {
+    currentProps = { ...currentProps, ...nextProps }
+  }
+
+  return [props, update]
+}
+
+export { createProps }

frontend/node_modules/@testing-library/svelte-core/src/render.js

@@ -0,0 +1,21 @@
+import { mount } from './mount.js'
+import { setup } from './setup.js'
+
+/**
+ * Render a component into the document.
+ *
+ * @template {import('../types.js').Component} C
+ *
+ * @param {import('../types.js').ComponentImport<C>} Component - The component to render.
+ * @param {import('../types.js').ComponentOptions<C>} componentOptions - Customize how Svelte renders the component.
+ * @param {import('../types.js').SetupOptions} setupOptions - Customize how the document is set up.
+ * @returns {import('../types.js').RenderResult<C>} The rendered component.
+ */
+const render = (Component, componentOptions, setupOptions = {}) => {
+  const { mountOptions, ...setupResult } = setup(componentOptions, setupOptions)
+  const mountResult = mount(Component, mountOptions)
+
+  return { ...setupResult, ...mountResult }
+}
+
+export { render }

frontend/node_modules/@testing-library/svelte-core/src/setup.js

@@ -0,0 +1,86 @@
+/** Set up the document to render a component. */
+import { addCleanupTask } from './cleanup.js'
+import { IS_MODERN_SVELTE } from './svelte-version.js'
+
+/** Allowed options to the `mount` call or legacy component constructor. */
+const ALLOWED_MOUNT_OPTIONS = IS_MODERN_SVELTE
+  ? ['target', 'anchor', 'props', 'events', 'context', 'intro']
+  : ['target', 'accessors', 'anchor', 'props', 'hydrate', 'intro', 'context']
+
+class UnknownSvelteOptionsError extends TypeError {
+  constructor(unknownOptions) {
+    super(`Unknown options.
+
+    Unknown: [ ${unknownOptions.join(', ')} ]
+    Allowed: [ ${ALLOWED_MOUNT_OPTIONS.join(', ')} ]
+
+    To pass both Svelte options and props to a component,
+    or to use props that share a name with a Svelte option,
+    you must place all your props under the \`props\` key:
+
+    render(Component, { props: { /** props here **/ } })
+`)
+    this.name = 'UnknownSvelteOptionsError'
+  }
+}
+
+/**
+ * Validate a component's mount options.
+ *
+ * @template {import('../types.js').Component} C
+ * @param {import('../types.js').ComponentOptions<C>} options - props or mount options
+ * @returns {Partial<import('../types.js').MountOptions<C>>}
+ */
+const validateOptions = (options) => {
+  const isProps = !Object.keys(options).some((option) =>
+    ALLOWED_MOUNT_OPTIONS.includes(option)
+  )
+
+  if (isProps) {
+    return { props: options }
+  }
+
+  // Check if any props and Svelte options were accidentally mixed.
+  const unknownOptions = Object.keys(options).filter(
+    (option) => !ALLOWED_MOUNT_OPTIONS.includes(option)
+  )
+
+  if (unknownOptions.length > 0) {
+    throw new UnknownSvelteOptionsError(unknownOptions)
+  }
+
+  return options
+}
+
+/**
+ * Set up the document to render a component.
+ *
+ * @template {import('../types.js').Component} C
+ * @param {import('../types.js').ComponentOptions<C>} componentOptions - props or mount options
+ * @param {import('../types.js').SetupOptions} setupOptions - base element of the document to bind any queries
+ * @returns {import('../types.js').SetupResult<C>}
+ */
+const setup = (componentOptions, setupOptions = {}) => {
+  const mountOptions = validateOptions(componentOptions)
+
+  const baseElement =
+    setupOptions.baseElement ?? mountOptions.target ?? document.body
+
+  const container =
+    mountOptions.target ??
+    baseElement.appendChild(document.createElement('div'))
+
+  addCleanupTask(() => {
+    if (container.parentNode === document.body) {
+      container.remove()
+    }
+  })
+
+  return {
+    baseElement,
+    container,
+    mountOptions: { ...mountOptions, target: container },
+  }
+}
+
+export { setup, UnknownSvelteOptionsError }

frontend/node_modules/@testing-library/svelte-core/src/svelte-version.js

@@ -0,0 +1,7 @@
+/** Detect which version of Svelte we're using */
+import * as Svelte from 'svelte'
+
+/** Whether we're using Svelte >= 5. */
+const IS_MODERN_SVELTE = typeof Svelte.mount === 'function'
+
+export { IS_MODERN_SVELTE }

frontend/node_modules/@testing-library/svelte-core/types.d.ts

@@ -0,0 +1,131 @@
+/* eslint-disable @typescript-eslint/no-explicit-any, @typescript-eslint/no-deprecated */
+/**
+ * Component and utility types.
+ *
+ * Supports components from Svelte 3, 4, and 5.
+ */
+import type {
+  Component as ModernComponent,
+  ComponentConstructorOptions as LegacyConstructorOptions,
+  ComponentProps,
+  EventDispatcher,
+  mount,
+  SvelteComponent as Svelte4LegacyComponent,
+  SvelteComponentTyped as Svelte3LegacyComponent,
+} from 'svelte'
+
+type IS_MODERN_SVELTE = ModernComponent extends (...args: any[]) => any
+  ? true
+  : false
+
+type IS_LEGACY_SVELTE_4 =
+  EventDispatcher<any> extends (...args: any[]) => any ? true : false
+
+/** A compiled, imported Svelte component. */
+export type Component<
+  P extends Record<string, any> = any,
+  E extends Record<string, any> = any,
+> = IS_MODERN_SVELTE extends true
+  ? ModernComponent<P, E> | LegacyComponent<P>
+  : LegacyComponent<P>
+
+/** A compiled, imported Svelte 3 or 4 component. */
+export type LegacyComponent<P extends Record<string, any> = any> =
+  IS_LEGACY_SVELTE_4 extends true
+    ? Svelte4LegacyComponent<P>
+    : Svelte3LegacyComponent<P>
+
+/**
+ * The "type" of an imported, compiled Svelte component.
+ *
+ * In Svelte 5, there is no difference between the
+ * imported component and its "type" - it's just a function.
+ * In Svelte 3/4, the imported component is a class.
+ */
+export type ComponentType<C> = C extends LegacyComponent
+  ? new (...args: any[]) => C
+  : C
+
+/**
+ * A component import.
+ *
+ * A convenience type to allow dynamically `import(...)`'d
+ * components to be passed directly to `mount.`
+ */
+export type ComponentImport<C> =
+  | ComponentType<C>
+  | { default: ComponentType<C> }
+
+/** The props of a component. */
+export type Props<C extends Component> = ComponentProps<C>
+
+/**
+ * The exported fields of a component.
+ *
+ * In Svelte 5, this is the set of variables marked as `export`'d.
+ * In Svelte 4, this is simply the instance of the component class.
+ */
+export type Exports<C> = IS_MODERN_SVELTE extends true
+  ? C extends ModernComponent<any, infer E>
+    ? E
+    : C & { $set: never; $on: never; $destroy: never }
+  : C
+
+/**
+ * Options that may be passed to `mount` when rendering the component.
+ *
+ * In Svelte 4, these are the options passed to the component constructor.
+ */
+export type MountOptions<C extends Component> = IS_MODERN_SVELTE extends true
+  ? Parameters<typeof mount<Props<C>, Exports<C>>>[1]
+  : LegacyConstructorOptions<Props<C>>
+
+/** A component's props or some of its mount options. */
+export type ComponentOptions<C extends Component> =
+  | Props<C>
+  | Partial<MountOptions<C>>
+
+/** Update a component's props and trigger updates to the DOM. */
+export type Rerender<C extends Component> = (
+  props: Partial<Props<C>>
+) => Promise<void>
+
+/** The result of mounting a component into the document. */
+export interface MountResult<C extends Component> {
+  /** The mounted component's exports. */
+  component: Exports<C>
+  /** Unmount the component. */
+  unmount: () => void
+  /** Rerender the component. */
+  rerender: Rerender<C>
+}
+
+/** Options for configuring the document. */
+export interface SetupOptions {
+  /** The base document element, `document.body` if unspecified. */
+  baseElement?: HTMLElement
+}
+
+/** The result of setting up the document for rendering. */
+export interface SetupResult<C extends Component> {
+  /** The base document element, usually `document.body`. */
+  baseElement: HTMLElement
+  /** The component's immediate container element, usually a `<div>` appended to `document.body`. */
+  container: HTMLElement
+  /** Options to pass to `mount`. */
+  mountOptions: MountOptions<C>
+}
+
+/** The result of setting up the document and rendering the component. */
+export interface RenderResult<C extends Component> {
+  /** The base document element, usually `document.body`. */
+  baseElement: HTMLElement
+  /** The component's immediate container element, usually a `<div>` appended to `document.body`. */
+  container: HTMLElement
+  /** The mounted component's exports. */
+  component: Exports<C>
+  /** Unmount the component. */
+  unmount: () => void
+  /** Rerender the component. */
+  rerender: Rerender<C>
+}