Renaming of rest resources

frontend/src/App.tsx

@@ -1,11 +1,19 @@
-import { BrowserRouter as Router, Routes, Route } from "react-router-dom"
+import {BrowserRouter as Router, Route, Routes} from "react-router-dom"
 import RecipeDetailPage from "./components/recipes/RecipeDetailPage"
 import RecipeEditPage from "./components/recipes/RecipeEditPage"
 import RecipeListPage from "./components/recipes/RecipeListPage"
-import { getLoginUrl, getRecipeAddUrlDefinition, getRecipeDetailsUrlDefinition, getRecipeEditUrlDefinition, getRecipeListUrlDefinition, getRootUrlDefinition } from "./routes"
+import {
+    getLoginUrlDefinition,
+    getRecipeAddUrlDefinition,
+    getRecipeDetailsUrlDefinition,
+    getRecipeEditUrlDefinition,
+    getRecipeListUrlDefinition,
+    getUserUrlDefinition
+} from "./routes"
 
 import "./App.css"
 import LoginPage from "./components/LoginPage"
+import UserManagementPage from "./components/users/UserManagementPage.tsx";
 
 /**
  * Main application component.
@@ -16,7 +24,8 @@ function App() {
         <Router>
             <Routes>
                 {/* Login page */}
-        <Route path={getLoginUrl()} element={<LoginPage/>}/>
+                <Route path={getLoginUrlDefinition()} element={<LoginPage/>}/>
+
                 {/* Home page: list of recipes */}
                 <Route path={getRecipeListUrlDefinition()} element={<RecipeListPage/>}/>
 
@@ -28,6 +37,8 @@ function App() {
 
                 {/* Add page: form to add a recipe */}
                 <Route path={getRecipeAddUrlDefinition()} element={<RecipeEditPage/>}/>
+                {/*User management */}
+                <Route path={getUserUrlDefinition()} element={<UserManagementPage/>}/>
             </Routes>
         </Router>
     )

frontend/src/api/apiClient.ts

@@ -0,0 +1,97 @@
+/**
+ * A centralized API client that wraps around the native fetch API.
+ * It automatically handles authentication headers, JSON parsing, and error handling.
+ *
+ * This client is used across the app for interacting with backend endpoints.
+ *
+ * @todo modify all endpoints to use api client and remove old utils
+ */
+
+const API_BASE_URL = import.meta.env.VITE_API_BASE
+
+/**
+ * Helper: Reads the JWT token from localStorage (if available)
+ */
+function getAuthToken(): string | null {
+    try {
+        const sessionData = localStorage.getItem("session");
+        if (!sessionData) return null;
+
+        const parsed = JSON.parse(sessionData);
+        return parsed.token ?? null;
+    } catch (err) {
+        console.error("Failed to parse token from localStorage:", err);
+        return null;
+    }
+}
+
+/**
+ * Custom error class for API responses.
+ */
+export class ApiError extends Error {
+    public status: number;
+    public details?: string;
+
+    constructor(message: string, status: number, details?: string) {
+        super(message);
+        this.status = status;
+        this.details = details;
+    }
+}
+
+/**
+ * Wrapper for making API requests.
+ * Handles JSON encoding/decoding and authorization headers automatically.
+ *
+ * @param endpoint - API endpoint (e.g. "user/me")
+ * @param options - fetch configuration (method, headers, body)
+ * @returns parsed JSON response
+ */
+export async function apiRequest<T>(
+    endpoint: string,
+    options: RequestInit = {}
+): Promise<T> {
+    const token = getAuthToken();
+
+    const headers: HeadersInit = {
+        "Content-Type": "application/json",
+        ...(token ? {Authorization: `Bearer ${token}`} : {}),
+        ...options.headers,
+    };
+
+    const response = await fetch(`${API_BASE_URL}${endpoint}`, {
+        ...options,
+        headers,
+    });
+
+    // Handle non-OK responses gracefully
+    if (!response.ok) {
+        let details;
+        try {
+            details = await response.json();
+        } catch {
+            details = await response.text();
+        }
+        throw new ApiError(`Request to ${endpoint} failed`, response.status, details);
+    }
+
+    // Handle empty response bodies
+    if (response.status === 204) {
+        return {} as T;
+    }
+
+    return response.json() as Promise<T>;
+}
+
+/**
+ * Shorthand helpers for convenience.
+ */
+export const apiClient = {
+    get: <T>(endpoint: string) => apiRequest<T>(endpoint, {method: "GET"}),
+    post: <T>(endpoint: string, body: object) =>
+        apiRequest<T>(endpoint, {method: "POST", body: JSON.stringify(body)}),
+    put: <T>(endpoint: string, body: object) =>
+        apiRequest<T>(endpoint, {method: "PUT", body: JSON.stringify(body)}),
+    delete: <T>(endpoint: string) =>
+        apiRequest<T>(endpoint, {method: "DELETE"}),
+};

frontend/src/api/dtos/ChangeUserPasswordRequest.ts

@@ -0,0 +1,7 @@
+/**
+ * DTO for changing user password
+ */
+export class ChangeUserPasswordRequest {
+    userId?: string;
+    password?: string;
+}

frontend/src/api/dtos/CreateUserRequest.ts

@@ -0,0 +1,9 @@
+import type {UserDto} from "./UserDto.js";
+
+/**
+ * DTO used for user creation
+ */
+export class CreateUserRequest {
+    userData?: UserDto;
+    password?: string;
+}

frontend/src/api/dtos/CreateUserResponse.ts

@@ -0,0 +1,5 @@
+import { UserDto } from "./UserDto.js";
+
+export class CreateUserResponse{
+    userData?: UserDto;
+}

frontend/src/api/dtos/LoginRequest.ts

@@ -1,7 +1,7 @@
 /**
  * Defines a login request
  */
-export class LoginRequestDto {
+export class LoginRequest {
     userName?: string;
     password?: string;
 }

frontend/src/api/dtos/LoginResponse.ts

@@ -0,0 +1,10 @@
+import {UserDto} from "./UserDto.js";
+
+/**
+ * Response  to a successful login
+ */
+export class LoginResponse {
+    userData?: UserDto;
+    token?: string;
+    expiryDate?: Date;
+}

frontend/src/api/dtos/LoginResponseDto.ts

@@ -1,10 +0,0 @@
-import { UserDto } from "./UserDto.js";
-
-/**
- * Response  to a successful login
- */
-export class LoginResponseDto {
-    userData?: UserDto;
-    token?: string;
-    expiryDate? : Date;
-}

frontend/src/api/dtos/UserDto.ts

@@ -1,9 +1,10 @@
-import { AbstractDto } from "./AbstractDto.ts";
+import {AbstractDto} from "./AbstractDto";
+import {UserRole} from "../enums/UserRole";
 
-export class UserDto extends AbstractDto {
+export interface UserDto extends AbstractDto {
     firstName?: string;
     lastName?: string;
-    userName!: string;
-    email!: string;
-    role?: string;
+    userName: string;
+    email: string;
+    role?: UserRole;
 }

frontend/src/api/dtos/UserListResponse.ts

@@ -0,0 +1,8 @@
+import {UserDto} from "./UserDto.js";
+
+/**
+ * API response for delivering a list of users
+ */
+export class UserListResponse {
+    valueList: UserDto[] = [];
+}

frontend/src/api/endpoints/AuthRestResource.ts

@@ -0,0 +1,26 @@
+import type {LoginRequest} from "../dtos/LoginRequest.ts";
+import type {LoginResponse} from "../dtos/LoginResponse.ts";
+import {postJson} from "../utils/requests";
+
+
+/**
+ * Util for handling the recipe api
+ */
+// read base url from .env file
+const BASE_URL = import.meta.env.VITE_API_BASE;
+
+/**
+ * URL for handling recipes
+ */
+const AUTH_URL = `${BASE_URL}/auth`
+
+
+/**
+ * Login to recipe app
+ * @param loginRequest Login Requets
+ * @returns LoginResponse
+ */
+export async function login(loginRequest: LoginRequest): Promise<LoginResponse> {
+    const res = await postJson(`${AUTH_URL}/login`, JSON.stringify(loginRequest), false);
+    return res.json();
+}

frontend/src/api/endpoints/UserRestResource.ts

@@ -0,0 +1,26 @@
+import {apiClient} from "../apiClient";
+import type {UserDto} from "../dtos/UserDto";
+import type {CreateUserRequest} from "../dtos/CreateUserRequest.ts";
+import type {ChangeUserPasswordRequest} from "../dtos/ChangeUserPasswordRequest.ts";
+import type {CreateUserResponse} from "../dtos/CreateUserResponse.ts";
+import type {UserListResponse} from "../dtos/UserListResponse.ts";
+
+export async function fetchCurrentUser(): Promise<UserDto> {
+    return apiClient.get("/user/me");
+}
+
+export async function fetchAllUsers(): Promise<UserListResponse> {
+    return apiClient.get("/user/all");
+}
+
+export async function createUser(dto: CreateUserRequest): Promise<CreateUserResponse> {
+    return apiClient.post("/user/create", dto);
+}
+
+export async function updateUser(dto: UserDto): Promise<UserDto> {
+    return apiClient.post("/user/update", dto);
+}
+
+export async function changePassword(dto: ChangeUserPasswordRequest) {
+    return apiClient.post("/user/change-password", dto);
+}

frontend/src/api/enums/UserRole.ts

@@ -0,0 +1,52 @@
+/**
+ * User roles - Frontend version
+ * Content should match backend enum exactly
+ * However, we cannot use a basic enum here as we're using erasableSyntaxOnly.
+ */
+export const UserRole = {
+    USER: "user",
+    ADMIN: "admin",
+} as const;
+
+// Create a type from the values
+export type UserRole = typeof UserRole[keyof typeof UserRole];
+
+/**
+ * Helper functions for UserRole in frontend
+ */
+export const UserRoleHelper = {
+    /**
+     * Get display name for role (German)
+     */
+    getDisplayName(role: UserRole): string {
+        const displayNames: Record<UserRole, string> = {
+            [UserRole.USER]: "Benutzer",
+            [UserRole.ADMIN]: "Administrator",
+        };
+        return displayNames[role];
+    },
+
+    /**
+     * Get all roles with display names for dropdowns
+     */
+    getRoleOptions(): Array<{ value: UserRole; label: string }> {
+        return Object.values(UserRole).map((role) => ({
+            value: role,
+            label: this.getDisplayName(role),
+        }));
+    },
+
+    /**
+     * Check if a string is a valid role
+     */
+    isValidRole(value: string): value is UserRole {
+        return Object.values(UserRole).includes(value as UserRole);
+    },
+
+    /**
+     * Get all role values
+     */
+    getAllRoles(): UserRole[] {
+        return Object.values(UserRole);
+    },
+};

frontend/src/api/points/AuthPoint.ts

@@ -1,26 +0,0 @@
-import type { LoginRequestDto } from "../dtos/LoginRequestDto";
-import type { LoginResponseDto } from "../dtos/LoginResponseDto";
-import { postJson } from "../utils/requests";
-
-
-/**
- * Util for handling the recipe api
- */
-// read base url from .env file
-const BASE_URL = import.meta.env.VITE_API_BASE;
-
-/**
- * URL for handling recipes
- */
-const AUTH_URL = `${BASE_URL}/auth`
-
-
-/**
- * Create new Recipe
- * @param recipe Recipe to create
- * @returns Saved recipe
- */
-export async function login(requestDto: LoginRequestDto): Promise<LoginResponseDto> {
-  const res = await postJson(`${AUTH_URL}/login`, JSON.stringify(requestDto), false);
-  return res.json();
-}

frontend/src/components/LoginPage.tsx

@@ -1,8 +1,8 @@
 import {useState} from "react";
 import Button from "./basics/Button";
-import type {LoginRequestDto} from "../api/dtos/LoginRequestDto";
-import type {LoginResponseDto} from "../api/dtos/LoginResponseDto";
-import {login} from "../api/points/AuthPoint";
+import type {LoginRequest} from "../api/dtos/LoginRequest.ts";
+import type {LoginResponse} from "../api/dtos/LoginResponse.ts";
+import {login} from "../api/endpoints/AuthRestResource.ts";
 import {getRecipeListUrl} from "../routes";
 import {useNavigate} from "react-router-dom";
 import PasswordField from "./basics/PasswordField";
@@ -20,14 +20,14 @@ export default function LoginPage() {
      * Login
      */
     const executeLogin = async () => {
-        const dto: LoginRequestDto = {
+        const dto: LoginRequest = {
             userName,
             password,
         };
 
         try {
             console.log("Trying to log in with " + dto.userName);
-            const loginResponse: LoginResponseDto = await login(dto);
+            const loginResponse: LoginResponse = await login(dto);
             localStorage.setItem("session", JSON.stringify(loginResponse));
             console.log("Successfully logged in as " + loginResponse.userData?.userName);
             setErrorMessage(null);

frontend/src/components/SettingsMenu.tsx

@@ -0,0 +1,69 @@
+import {X} from "lucide-react";
+import {useNavigate} from "react-router-dom";
+import type {LoginResponse} from "../api/dtos/LoginResponse.ts";
+import {getUserUrl} from "../routes.ts";
+import Button from "./basics/Button.tsx";
+import {ButtonType} from "./basics/BasicButtonDefinitions.ts";
+import type {UserDto} from "../api/dtos/UserDto.ts";
+
+/**
+ * Overlay settings menu that displays current user info
+ * and provides navigation to user management.
+ */
+type SettingsMenuProps = {
+    onClose: () => void;
+};
+
+export function SettingsMenu({onClose}: SettingsMenuProps) {
+    const navigate = useNavigate();
+    const storedSession = localStorage.getItem("session");
+    const loginData: LoginResponse | null = storedSession
+        ? JSON.parse(storedSession)
+        : null;
+    const user = loginData?.userData;
+
+    const formatUserName = (user: UserDto) => {
+        const parts = [];
+        if (user.firstName) parts.push(user.firstName);
+        if (user.lastName) parts.push(user.lastName);
+        return parts.length > 0 ? parts.join(" ") : user.userName;
+    };
+
+    return (
+        <div className="fixed inset-0 bg-black/40 flex justify-end z-50">
+            <div className="bg-white dark:bg-gray-800 w-80 p-6 shadow-xl flex flex-col">
+                {/* Close button */}
+                <button
+                    onClick={onClose}
+                    className="self-end text-gray-500 hover:text-gray-800"
+                >
+                    <X/>
+                </button>
+
+                <h2 className="text-xl font-semibold mb-4">Einstellungen</h2>
+
+                {user ? (
+                    <>
+                        <p className="text-gray-800 dark:text-gray-100 font-medium">
+                            {formatUserName(user)}
+                        </p>
+                        <p className="text-gray-600 dark:text-gray-400 text-sm mb-6">
+                            {user.role === "admin" ? "Administrator" : "Benutzer"}
+                        </p>
+
+                        <Button
+                            onClick={() => {
+                                navigate(getUserUrl());
+                                onClose();
+                            }}
+                            buttonType={ButtonType.PrimaryButton}
+                            text={"Benutzerverwaltung"}
+                        />
+                    </>
+                ) : (
+                    <p className="text-gray-500">Nicht eingeloggt</p>
+                )}
+            </div>
+        </div>
+    );
+}

frontend/src/components/basics/BasicButtonDefinitions.ts

@@ -22,6 +22,10 @@ export const ButtonType = {
         textColor: "text-white",
         backgroundColor: "bg-gray-600  hover:bg-gray-800",
     },
+    LightButton: {
+        textColor: "text-gray-600",
+        backgroundColor: "bg-white  hover:bg-gray-300",
+    },
     PrimaryButton: {
         textColor: "text-gray-600",
         backgroundColor: "bg-blue-300 hover:bg-blue-400",

frontend/src/components/basics/ButtonGroupLayout.tsx

@@ -18,7 +18,7 @@ export default function ButtonGroupLayout({children, className, ...rest}: Button
         <div
             {...rest}
             className={clsx(
-                "flex gap-4 mt-8",
+                "flex gap-4 mt-4",
                 className
             )}
         >

frontend/src/components/basics/CircularIconButton.tsx

@@ -6,6 +6,7 @@ import clsx from "clsx";
 type CircularIconButtonProps = {
     icon: LucideIcon;
     onClick: () => void;
+    buttonType?: ButtonType
     disabled?: boolean;
     className?: string;
 };
@@ -17,14 +18,16 @@ export default function CircularIconButton({
                                                onClick,
                                                icon: Icon,
                                                className = "",
+                                               buttonType = ButtonType.PrimaryButton,
                                                disabled = false,
                                                ...props
                                            }: CircularIconButtonProps) {
     return (
         <button
             className={clsx(
-                "flex-shrink-0 w-7 h-7 rounded-full text-white flex items-center justify-center shadow-sm",
-                ButtonType.PrimaryButton.backgroundColor,
+                "flex-shrink-0 w-7 h-7 rounded-full flex items-center justify-center shadow-sm",
+                buttonType.backgroundColor,
+                buttonType?.textColor,
                 className)}
             onClick={onClick}
             disabled={disabled}

frontend/src/components/basics/ErrorPopup.tsx

@@ -0,0 +1,41 @@
+import {AlertCircle, X} from "lucide-react";
+
+type ErrorPopupProps = {
+    message: string;
+    onClose: () => void;
+};
+
+/**
+ * ErrorPopup - Displays error messages in a modal overlay
+ */
+export default function ErrorPopup({message, onClose}: ErrorPopupProps) {
+    return (
+        <div className="fixed inset-0 flex items-center justify-center bg-black/40 z-50">
+            <div className="bg-white rounded-lg p-6 w-96 shadow-lg">
+                <div className="flex items-start justify-between mb-4">
+                    <div className="flex items-center gap-3">
+                        <AlertCircle className="text-red-600" size={24}/>
+                        <h3 className="text-lg font-semibold text-red-600">Fehler</h3>
+                    </div>
+                    <button
+                        onClick={onClose}
+                        className="text-gray-400 hover:text-gray-600 transition-colors"
+                    >
+                        <X size={20}/>
+                    </button>
+                </div>
+
+                <p className="text-gray-700 mb-4">{message}</p>
+
+                <div className="flex justify-end">
+                    <button
+                        onClick={onClose}
+                        className="px-4 py-2 bg-red-600 text-white rounded hover:bg-red-700 transition-colors"
+                    >
+                        Schließen
+                    </button>
+                </div>
+            </div>
+        </div>
+    );
+}

frontend/src/components/basics/NumberStepControl.tsx

@@ -50,6 +50,7 @@ export function NumberStepControl({
             className)}>
             <CircularIconButton
                 onClick={handleDecrease}
+                className={"text-white"}
                 icon={Minus}
             />
 
@@ -64,6 +65,7 @@ export function NumberStepControl({
 
             <CircularIconButton
                 onClick={handleIncrease}
+                className={"text-white"}
                 icon={Plus}
             />
 

frontend/src/components/basics/PageContentLayout.tsx

@@ -0,0 +1,50 @@
+// src/components/basics/PageContentLayout.tsx
+import React, {type ReactNode, useState} from "react";
+import clsx from "clsx";
+import {Settings} from "lucide-react";
+import {SettingsMenu} from "../SettingsMenu";
+import CircularIconButton from "./CircularIconButton.tsx";
+import {ButtonType} from "./BasicButtonDefinitions.ts";
+
+/**
+ * Layout wrapper for the main content area of a page.
+ * Includes a settings button (top-right) that opens a global settings menu.
+ */
+type PageContentLayoutProps = React.HTMLAttributes<HTMLDivElement> & {
+    /** The main page content (e.g. header, body) */
+    children: ReactNode;
+};
+
+export default function PageContentLayout({
+                                              children,
+                                              className,
+                                              ...props
+                                          }: PageContentLayoutProps) {
+    const [isMenuOpen, setIsMenuOpen] = useState(false);
+
+    return (
+        <div
+            {...props}
+            className={clsx(
+                "relative bg-gray-100 w-full min-h-screen max-w-6xl shadow-xl p-8",
+                className
+            )}
+        >
+            {/* Settings Button (top-right) - Sticky with higher z-index than header */}
+            <CircularIconButton
+                onClick={() => setIsMenuOpen(true)}
+                buttonType={ButtonType.LightButton}
+                className="absolute top-4 right-4 w-10 h-10 z-20"
+                icon={Settings}
+            />
+
+            {/* Page content with top padding to accommodate settings button */}
+            <div className="pt-8">
+                {children}
+            </div>
+
+            {/* Overlay Settings Menu */}
+            {isMenuOpen && <SettingsMenu onClose={() => setIsMenuOpen(false)}/>}
+        </div>
+    );
+}

frontend/src/components/basics/PasswordField.tsx

@@ -7,12 +7,18 @@ type PasswordFieldProps = {
     onPasswordChanged: (password: string) => void
     onKeyDown: (event: React.KeyboardEvent<HTMLInputElement>) => void
     className?: string
+    placeholder?: string
 }
 
 /**
  * Password field component
  */
-export default function PasswordField({onPasswordChanged, onKeyDown, className = ""}: PasswordFieldProps) {
+export default function PasswordField({
+                                          onPasswordChanged,
+                                          onKeyDown,
+                                          placeholder = "Passwort",
+                                          className = ""
+                                      }: PasswordFieldProps) {
     const [showPassword, setShowPassword] = useState(false);
     const [password, setPassword] = useState<string>("");
 
@@ -27,7 +33,7 @@ export default function PasswordField({onPasswordChanged, onKeyDown, className =
             <input
                 className="pr-10"
                 type={showPassword ? "text" : "password"}
-                placeholder="Passwort"
+                placeholder={placeholder}
                 value={password}
                 onChange={(e) => changePassword(e.target.value)}
                 onKeyDown={onKeyDown}

frontend/src/components/basics/SelectField.tsx

@@ -0,0 +1,47 @@
+type SelectFieldProps<T extends string> = {
+    value: T;
+    onChange: (value: T) => void;
+    options: { value: T; label: string }[];
+    className?: string;
+};
+
+/**
+ * SelectField - A dropdown styled consistently with input fields
+ * Generic component that works with any string-based type (including string literals and enums)
+ *
+ * @example
+ * // With UserRole type
+ * <SelectField<UserRole>
+ *   value={user.role}
+ *   onChange={(role) => setUser({...user, role})}
+ *   options={UserRoleHelper.getRoleOptions()}
+ * />
+ *
+ * @example
+ * // With plain strings
+ * <SelectField<string>
+ *   value={status}
+ *   onChange={setStatus}
+ *   options={[{value: "active", label: "Active"}, {value: "inactive", label: "Inactive"}]}
+ * />
+ */
+export default function SelectField<T extends string>({
+                                                          value,
+                                                          onChange,
+                                                          options,
+                                                          className = ''
+                                                      }: SelectFieldProps<T>) {
+    return (
+        <select
+            value={value}
+            onChange={(e) => onChange(e.target.value as T)}
+            className={`p-2 w-full border rounded-md bg-white border-gray-600 hover:border-blue-800 transition-colors text-gray-600 focus:outline-none focus:border-blue-900 cursor-pointer ${className}`}
+        >
+            {options.map((option) => (
+                <option key={option.value} value={option.value}>
+                    {option.label}
+                </option>
+            ))}
+        </select>
+    );
+}

frontend/src/components/basics/TextLinkButton.tsx

@@ -0,0 +1,20 @@
+type TextLinkButtonProps = {
+    text: string;
+    onClick: () => void;
+    className?: string;
+};
+
+/**
+ * TextLinkButton - A button styled as a hyperlink
+ */
+export default function TextLinkButton({text, onClick, className = ''}: TextLinkButtonProps) {
+    return (
+        <button
+            type="button"
+            onClick={onClick}
+            className={`text-blue-600 hover:text-blue-800 hover:underline transition-colors bg-transparent border-none p-0 cursor-pointer ${className}`}
+        >
+            {text}
+        </button>
+    );
+}

frontend/src/components/recipes/IngredientGroupListEditor.tsx

@@ -50,6 +50,7 @@ export function IngredientGroupListEditor({ingredientGroupList, onChange}: Ingre
                 {ingredientGroupList.map((ingGrp, index) => (
                     <IngredientGroupEditorListItem
                         index={index}
+                        key={index}
                         ingredientGroupModel={ingGrp}
                         handleUpdate={handleUpdate}
                         handleRemove={handleRemove}

frontend/src/components/recipes/RecipeDetailPage.tsx

@@ -1,7 +1,7 @@
 import {useParams} from "react-router-dom"
 import type {RecipeModel} from "../../models/RecipeModel"
 import {useEffect, useState} from "react"
-import {fetchRecipe} from "../../api/points/RecipePoint"
+import {fetchRecipe} from "../../api/endpoints/RecipeRestResource.ts"
 import {getRecipeEditUrl, getRecipeListUrl} from "../../routes"
 import ButtonLink from "../basics/ButtonLink"
 import {mapRecipeDtoToModel} from "../../mappers/RecipeMapper"
@@ -10,11 +10,11 @@ import {NumberedListItem} from "../basics/NumberedListItem.tsx";
 import {ButtonType} from "../basics/BasicButtonDefinitions.ts";
 import StickyHeader from "../basics/StickyHeader.tsx";
 import ButtonGroupLayout from "../basics/ButtonGroupLayout.tsx";
-import ContentBackground from "../basics/ContentBackground.tsx";
 import ContentBody from "../basics/ContentBody.tsx";
 import PageContainer from "../basics/PageContainer.tsx";
 import {BoxContainer} from "../basics/BoxContainer.tsx";
 import IngredientGroupDisplayListItem from "./IngredientGroupDisplayListItem.tsx";
+import PageContentLayout from "../basics/PageContentLayout.tsx";
 
 
 /**
@@ -86,7 +86,7 @@ export default function RecipeDetailPage() {
         /*Container spanning entire screen used to center content horizontally */
         <PageContainer>
             {/* Container defining the maximum width of the content */}
-            <ContentBackground>
+            <PageContentLayout>
                 {/* Header - remains in position when scrolling */}
                 <StickyHeader>
                     <h1>{recipeWorkingCopy.title}</h1>
@@ -123,6 +123,7 @@ export default function RecipeDetailPage() {
                     <ul>
                         {recipeWorkingCopy.ingredientGroupList.map((group, i) => (
                             <IngredientGroupDisplayListItem
+                                key={i}
                                 index={i}
                                 groupModel={group}
                             />
@@ -150,7 +151,7 @@ export default function RecipeDetailPage() {
                         />
                     </ButtonGroupLayout>
                 </ContentBody>
-            </ContentBackground>
+            </PageContentLayout>
         </PageContainer>
     )
 }

frontend/src/components/recipes/RecipeEditor.tsx

@@ -7,9 +7,9 @@ import {InstructionStepListEditor} from "./InstructionStepListEditor"
 import type {InstructionStepModel} from "../../models/InstructionStepModel"
 import {ButtonType} from "../basics/BasicButtonDefinitions"
 import ButtonGroupLayout from "../basics/ButtonGroupLayout.tsx";
-import ContentBackground from "../basics/ContentBackground.tsx";
 import ContentBody from "../basics/ContentBody.tsx";
 import PageContainer from "../basics/PageContainer.tsx";
+import PageContentLayout from "../basics/PageContentLayout.tsx";
 
 type RecipeEditorProps = {
     recipe: RecipeModel
@@ -86,7 +86,7 @@ export function RecipeEditor({recipe, onSave, onCancel}: RecipeEditorProps) {
         /*Container spanning entire screen used to center content horizontally */
         <PageContainer>
             {/* Container defining the maximum width of the content */}
-            <ContentBackground>
+            <PageContentLayout>
                 <h1 className="border-b-2 border-gray-300 pb-4">
                     {recipe.id ? "Rezept bearbeiten" : "Neues Rezept"}
                 </h1>
@@ -152,7 +152,7 @@ export function RecipeEditor({recipe, onSave, onCancel}: RecipeEditorProps) {
                         />
                     </ButtonGroupLayout>
                 </ContentBody>
-            </ContentBackground>
+            </PageContentLayout>
         </PageContainer>
     )
 }

frontend/src/components/recipes/RecipeListPage.tsx

@@ -6,8 +6,8 @@ import {useNavigate} from "react-router-dom"
 import {getRecipeAddUrl, getRecipeDetailUrl, getRecipeListUrl} from "../../routes"
 import RecipeListToolbar from "./RecipeListToolbar"
 import StickyHeader from "../basics/StickyHeader.tsx";
-import ContentBackground from "../basics/ContentBackground.tsx";
 import PageContainer from "../basics/PageContainer.tsx";
+import PageContentLayout from "../basics/PageContentLayout.tsx";
 
 /**
  * Displays a list of recipes in a sidebar layout.
@@ -46,7 +46,7 @@ export default function RecipeListPage() {
         /*Container spanning entire screen used to center content horizontally */
         <PageContainer>
             {/* Container defining the maximum width of the content */}
-            <ContentBackground>
+            <PageContentLayout>
                 {/* Header - remains in position when scrolling */}
                 <StickyHeader>
                     <h1>Recipes</h1>
@@ -69,7 +69,7 @@ export default function RecipeListPage() {
                         ))}
                     </div>
                 </div>
-            </ContentBackground>
+            </PageContentLayout>
         </PageContainer>
     )
 }  

frontend/src/components/users/ChangePasswordModal.tsx

@@ -0,0 +1,65 @@
+// src/components/basics/ChangePasswordModal.tsx
+import {useState} from "react";
+import {changePassword} from "../../api/endpoints/UserRestResource.ts";
+import PasswordField from "../basics/PasswordField.tsx";
+import ButtonGroupLayout from "../basics/ButtonGroupLayout.tsx";
+import Button from "../basics/Button.tsx";
+import {ButtonType} from "../basics/BasicButtonDefinitions.ts";
+
+type ChangePasswordModalProps = {
+    userId?: string;
+    onClose: () => void;
+};
+
+export function ChangePasswordModal({userId, onClose}: ChangePasswordModalProps) {
+    const [password, setPassword] = useState("");
+    const [confirm, setConfirm] = useState("");
+    const [error, setError] = useState("");
+
+    const handleSave = async () => {
+        if (password !== confirm) {
+            setError("Passwörter stimmen nicht überein.");
+            return;
+        }
+        try {
+            await changePassword({userId, password});
+            onClose();
+        } catch {
+            setError("Fehler beim Ändern des Passworts");
+        }
+    };
+
+    return (
+        <div className="fixed inset-0 flex items-center justify-center bg-black/40 z-50">
+            <div className="bg-white rounded-lg p-6 w-90 shadow-lg">
+                <h3 className="text-lg font-semibold mb-4">Passwort ändern</h3>
+
+                <PasswordField
+                    className="mb-2"
+                    placeholder="Neues Passwort"
+                    onPasswordChanged={setPassword}
+                    onKeyDown={handleSave}
+                />
+                <PasswordField
+                    className="mb-2"
+                    placeholder="Passwort bestätigen"
+                    onPasswordChanged={setConfirm}
+                    onKeyDown={handleSave}
+                />
+                {error && <p className="error-text mb-2">{error}</p>}
+
+                <ButtonGroupLayout>
+                    <Button
+                        onClick={handleSave}
+                        buttonType={ButtonType.PrimaryButton}
+                        text="Passwort ändern"
+                    />
+                    <Button
+                        onClick={onClose}
+                        text="Abbrechen"
+                    />
+                </ButtonGroupLayout>
+            </div>
+        </div>
+    );
+}

frontend/src/components/users/UserEditForm.tsx

@@ -0,0 +1,175 @@
+import {useEffect, useState} from "react";
+import type {UserDto} from "../../api/dtos/UserDto";
+import Button from "../basics/Button";
+import {ButtonType} from "../basics/BasicButtonDefinitions";
+import PasswordField from "../basics/PasswordField";
+import ButtonGroupLayout from "../basics/ButtonGroupLayout";
+import TextLinkButton from "../basics/TextLinkButton";
+import SelectField from "../basics/SelectField";
+import {UserRole, UserRoleHelper} from "../../api/enums/UserRole.ts";
+
+type UserEditFormProps = {
+    user: UserDto;
+    isAdmin: boolean;
+    isSaving: boolean;
+    onSave: (user: UserDto, password?: string) => Promise<void>;
+    onCancel: () => void;
+    onOpenPasswordModal: () => void;
+};
+
+/**
+ * UserEditForm - Form for creating/editing a user
+ */
+export default function UserEditForm({
+                                         user,
+                                         isAdmin,
+                                         isSaving,
+                                         onSave,
+                                         onCancel,
+                                         onOpenPasswordModal,
+                                     }: UserEditFormProps) {
+    const [editedUser, setEditedUser] = useState<UserDto>({...user});
+    const [password, setPassword] = useState("");
+    const [confirmPassword, setConfirmPassword] = useState("");
+    const [passwordError, setPasswordError] = useState("");
+
+    /**
+     * React to changes in selected user.
+     *
+     * When a new user is selected, the edit user must be updated and password fields as well as error messege
+     * must be reset.
+     */
+    useEffect(() => {
+        setEditedUser({...user});
+        setPassword("");
+        setConfirmPassword("");
+        setPasswordError("");
+    }, [user]);
+    /**
+     * Calls on save after validating passwords for new user.
+     */
+    const handleSave = async () => {
+        if (!editedUser.id) {
+            // New user - validate passwords
+            if (confirmPassword !== password) {
+                setPasswordError("Passwörter stimmen nicht überein");
+                return;
+            }
+            if (!password || password.length === 0) {
+                setPasswordError("Passwort ist erforderlich");
+                return;
+            }
+            setPasswordError("");
+            await onSave(editedUser, password);
+        } else {
+            // Existing user
+            await onSave(editedUser);
+        }
+    };
+
+    /**
+     * All available roles
+     */
+    const roleOptions = UserRoleHelper.getRoleOptions();
+
+    return (
+        <div className="px-6 py-2">
+            <h2>{editedUser.id ? "Benutzer bearbeiten" : "Neuen Benutzer anlegen"}</h2>
+            <div className="flex flex-col gap-3 max-w-md">
+                <label>Benutzername</label>
+                <input
+                    type="text"
+                    placeholder="Benutzername"
+                    value={editedUser.userName}
+                    onChange={(e) =>
+                        setEditedUser({...editedUser, userName: e.target.value})
+                    }
+                />
+
+                <label>Vorname</label>
+                <input
+                    type="text"
+                    placeholder="Vorname"
+                    value={editedUser.firstName ?? ""}
+                    onChange={(e) =>
+                        setEditedUser({...editedUser, firstName: e.target.value})
+                    }
+                />
+
+                <label>Nachname</label>
+                <input
+                    type="text"
+                    placeholder="Nachname"
+                    value={editedUser.lastName ?? ""}
+                    onChange={(e) =>
+                        setEditedUser({...editedUser, lastName: e.target.value})
+                    }
+                />
+
+                <label>E-Mail</label>
+                <input
+                    type="email"
+                    placeholder="E-Mail"
+                    value={editedUser.email ?? ""}
+                    onChange={(e) =>
+                        setEditedUser({...editedUser, email: e.target.value})
+                    }
+                />
+
+                {isAdmin && (
+                    <>
+                        <label>Benutzergruppe</label>
+                        <SelectField<UserRole>
+                            value={editedUser.role ?? UserRole.USER}
+                            onChange={(value) =>
+                                setEditedUser({...editedUser, role: value})
+                            }
+                            options={roleOptions}
+                        />
+                    </>
+                )}
+
+                {/* Show password field only when creating new user */}
+                {!editedUser.id && (
+                    <>
+                        <label>Passwort</label>
+                        <PasswordField
+                            onPasswordChanged={setPassword}
+                            onKeyDown={() => {
+                            }}
+                        />
+
+                        <label>Passwort bestätigen</label>
+                        <PasswordField
+                            placeholder="Passwort bestätigen"
+                            onPasswordChanged={setConfirmPassword}
+                            onKeyDown={() => {
+                            }}
+                        />
+                        {passwordError && <p className="error-text">{passwordError}</p>}
+                    </>
+                )}
+
+                {/* Change password link for existing user */}
+                {editedUser.id && (
+                    <div className="mt-2 text-right">
+                        <TextLinkButton
+                            text="Passwort ändern"
+                            onClick={onOpenPasswordModal}
+                        />
+                    </div>
+                )}
+
+                <ButtonGroupLayout>
+                    <Button
+                        text={isSaving ? "Speichern..." : "Speichern"}
+                        onClick={handleSave}
+                        buttonType={ButtonType.PrimaryButton}
+                        disabled={isSaving}
+                    />
+                    <Button text="Abbrechen" onClick={onCancel} disabled={isSaving}/>
+                </ButtonGroupLayout>
+            </div>
+        </div>
+    );
+}

frontend/src/components/users/UserList.tsx

@@ -0,0 +1,51 @@
+import clsx from "clsx";
+import type {UserDto} from "../../api/dtos/UserDto";
+
+type UserListProps = {
+    users: UserDto[];
+    selectedUser: UserDto | null;
+    onSelectUser: (user: UserDto) => void;
+};
+
+/**
+ * UserList - Displays a list of users with selection
+ */
+export default function UserList({users, selectedUser, onSelectUser}: UserListProps) {
+
+    const formatUserName = (user: UserDto) => {
+        const parts = [];
+        if (user.lastName) parts.push(user.lastName);
+        if (user.firstName) parts.push(user.firstName);
+        return parts.length > 0 ? parts.join(", ") : "";
+    };
+
+    return (
+        <div className="border-r border-gray-300 h-full">
+            <h2 className="px-4 py-2">Benutzer</h2>
+            <ul>
+                {users.map((user) => (
+                    <li
+                        key={user.id ?? user.userName}
+                        className={clsx(
+                            "px-4 py-3 cursor-pointer hover:bg-gray-200 transition-colors border-b border-gray-300",
+                            selectedUser?.id === user.id && "bg-blue-100 hover:bg-blue-200"
+                        )}
+                        onClick={() => {
+                            onSelectUser(user)
+                        }}
+                    >
+                        <div className={clsx(
+                            "text-base",
+                            selectedUser?.id === user.id && "font-semibold"
+                        )}>
+                            {formatUserName(user)}
+                        </div>
+                        <div className="text-sm text-gray-600 mt-1">
+                            {user.userName}
+                        </div>
+                    </li>
+                ))}
+            </ul>
+        </div>
+    );
+}

frontend/src/components/users/UserManagementPage.tsx

@@ -0,0 +1,217 @@
+import {useEffect, useState} from "react";
+import {createUser, fetchAllUsers, fetchCurrentUser, updateUser,} from "../../api/endpoints/UserRestResource.ts";
+import type {UserDto} from "../../api/dtos/UserDto";
+import ContentBody from "../basics/ContentBody";
+import StickyHeader from "../basics/StickyHeader";
+import Button from "../basics/Button";
+import {ButtonType} from "../basics/BasicButtonDefinitions";
+import PageContainer from "../basics/PageContainer";
+import {ChangePasswordModal} from "./ChangePasswordModal";
+import ButtonGroupLayout from "../basics/ButtonGroupLayout";
+import {Plus, X} from "lucide-react";
+import ButtonLink from "../basics/ButtonLink";
+import {getRecipeListUrl} from "../../routes";
+import type {CreateUserResponse} from "../../api/dtos/CreateUserResponse";
+import type {UserListResponse} from "../../api/dtos/UserListResponse";
+import UserList from "./UserList";
+import UserEditForm from "./UserEditForm";
+import ErrorPopup from "../basics/ErrorPopup";
+import {UserRole} from "../../api/enums/UserRole.ts";
+import PageContentLayout from "../basics/PageContentLayout.tsx";
+
+/**
+ * UserManagementPage
+ * -------------------
+ * Displays a two-column layout:
+ *  - Left: list of all users
+ *  - Right: edit form for selected or new user
+ *
+ * Allows:
+ *  - Admins to manage all users (add/edit)
+ *  - Regular users to edit their own profile
+ *  - Password changes via modal
+ */
+export default function UserManagementPage() {
+    const [users, setUsers] = useState<UserDto[]>([]);
+    const [selectedUser, setSelectedUser] = useState<UserDto | null>(null);
+    const [currentUser, setCurrentUser] = useState<UserDto | null>(null);
+    const [isPasswordModalOpen, setIsPasswordModalOpen] = useState(false);
+    const [isSaving, setIsSaving] = useState(false);
+    const [error, setError] = useState<string | null>(null);
+
+    const isAdmin = currentUser?.role === UserRole.ADMIN;
+
+    // Load current user and user list (if admin)
+    useEffect(() => {
+        loadData();
+    }, []);
+
+    /**
+     * Load data for user management page
+     *
+     * An admin can see all users while a normal user can only see his own user data.
+     * Initially, the current user is selected.
+     */
+    const loadData = async () => {
+        try {
+            const me = await fetchCurrentUser();
+            setCurrentUser(me);
+
+            if (me.role === UserRole.ADMIN) {
+                const userResponse: UserListResponse = await fetchAllUsers();
+
+                // Sort users alphabetically by last name, then first name
+                const sortedUsers = userResponse.valueList.sort((a, b) => {
+                    const lastNameCompare = (a.lastName || "").localeCompare(
+                        b.lastName || ""
+                    );
+                    if (lastNameCompare !== 0) {
+                        return lastNameCompare;
+                    }
+                    return (a.firstName || "").localeCompare(b.firstName || "");
+                });
+
+                setUsers(sortedUsers);
+                setSelectedUser(me);
+            } else {
+                setUsers([me]);
+                setSelectedUser(me);
+            }
+        } catch (err) {
+            setError(
+                err instanceof Error
+                    ? err.message
+                    : "Fehler beim Laden der Benutzerdaten"
+            );
+        }
+    };
+
+    /** Handles selecting a user from the list */
+    const handleSelectUser = (user: UserDto) => {
+        setSelectedUser({...user});
+    };
+
+    /** Handles saving user (create or update) */
+    const handleSave = async (user: UserDto, password?: string) => {
+        setIsSaving(true);
+        setError(null);
+        try {
+            if (!user.id) {
+                // New user
+                const response: CreateUserResponse = await createUser({
+                    userData: user,
+                    password: password || "",
+                });
+                const userDto = response.userData;
+                if (userDto) {
+                    const newUsers = [...users, userDto].sort((a, b) => {
+                        const lastNameCompare = (a.lastName || "").localeCompare(
+                            b.lastName || ""
+                        );
+                        if (lastNameCompare !== 0) {
+                            return lastNameCompare;
+                        }
+                        return (a.firstName || "").localeCompare(b.firstName || "");
+                    });
+                    setUsers(newUsers);
+                    setSelectedUser(userDto);
+                }
+            } else {
+                // Existing user
+                const updated = await updateUser(user);
+                setUsers(users.map((u) => (u.id === updated.id ? updated : u)));
+                setSelectedUser(updated);
+            }
+        } catch (err) {
+            setError(
+                err instanceof Error
+                    ? err.message
+                    : "Fehler beim Speichern der Benutzerdaten"
+            );
+        } finally {
+            setIsSaving(false);
+        }
+    };
+
+    /** Opens password modal */
+    const openPasswordModal = () => {
+        setIsPasswordModalOpen(true);
+    };
+
+    /** Add new empty user */
+    const handleAddUser = () => {
+        setSelectedUser({
+            userName: "",
+            firstName: "",
+            lastName: "",
+            email: "",
+            role: UserRole.USER,
+        });
+    };
+
+    return (
+        <PageContainer>
+            <PageContentLayout>
+                <StickyHeader className="flex flex-col gap-2 md:flex-row md:justify-between md:items-center">
+                    <h1>Benutzerverwaltung</h1>
+                    <ButtonGroupLayout>
+                        {isAdmin && (
+                            <Button
+                                icon={Plus}
+                                onClick={handleAddUser}
+                                text="Neuer Benutzer"
+                                buttonType={ButtonType.PrimaryButton}
+                            />
+                        )}
+                        {/* Leave user management and return to recipe list. @todo handle unsaved changes?*/}
+                        <ButtonLink icon={X} to={getRecipeListUrl()}/>
+                    </ButtonGroupLayout>
+                </StickyHeader>
+
+                <ContentBody className="p-0">
+                    <div className="flex flex-col md:flex-row min-h-[500px]">
+                        {/* User List - Left side, no padding */}
+                        <div className="md:w-2/5 lg:w-1/3">
+                            <UserList
+                                users={users}
+                                selectedUser={selectedUser}
+                                onSelectUser={handleSelectUser}
+                            />
+                        </div>
+
+                        {/* Edit Form - Right side, takes remaining space */}
+                        <div className="md:w-3/5 lg:w-2/3">
+                            {selectedUser ? (
+                                <UserEditForm
+                                    user={selectedUser}
+                                    isAdmin={isAdmin}
+                                    isSaving={isSaving}
+                                    onSave={handleSave}
+                                    onCancel={loadData}
+                                    onOpenPasswordModal={openPasswordModal}
+                                />
+                            ) : (
+                                <div className="px-6 py-4">
+                                    <p className="text-gray-600">Bitte einen Benutzer auswählen.</p>
+                                </div>
+                            )}
+                        </div>
+                    </div>
+                </ContentBody>
+
+                {/* Password Change Modal */}
+                {isPasswordModalOpen && (
+                    <ChangePasswordModal
+                        userId={selectedUser?.id}
+                        onClose={() => setIsPasswordModalOpen(false)}
+                    />
+                )}
+
+                {/* Error Popup */}
+                {error && (
+                    <ErrorPopup message={error} onClose={() => setError(null)}/>
+                )}
+            </PageContentLayout>
+        </PageContainer>
+    );
+}

frontend/src/routes.ts

@@ -2,17 +2,59 @@
  * Routes for all pages
  */
 // Route definitions using :id as placeholder for the id
-export function getRootUrlDefinition() : string { return getRootUrl()}
-export function getRecipeDetailsUrlDefinition() : string {return getRecipeDetailUrl(":id")}
-export function getRecipeEditUrlDefinition() : string {return getRecipeEditUrl(":id")}
-export function getRecipeAddUrlDefinition() : string {return getRecipeAddUrl()}
-export function getRecipeListUrlDefinition() : string {return getRecipeListUrl()}
-export function getLoginUrlDefinition() : string {return getLoginUrl()}
+export function getRootUrlDefinition(): string {
+    return getRootUrl()
+}
+
+export function getRecipeDetailsUrlDefinition(): string {
+    return getRecipeDetailUrl(":id")
+}
+
+export function getRecipeEditUrlDefinition(): string {
+    return getRecipeEditUrl(":id")
+}
+
+export function getRecipeAddUrlDefinition(): string {
+    return getRecipeAddUrl()
+}
+
+export function getRecipeListUrlDefinition(): string {
+    return getRecipeListUrl()
+}
+
+export function getLoginUrlDefinition(): string {
+    return getLoginUrl()
+}
+
+export function getUserUrlDefinition(): string {
+    return getUserUrl()
+}
 
 // URLs including id
-export function getRootUrl () : string { return "/"}
-export function getRecipeListUrl() : string {return "/recipe/list"}
-export function getRecipeDetailUrl(id: string) : string {return "/recipe/" + id + "/card"}
-export function getRecipeEditUrl(id: string) : string {return "/recipe/" + id + "/edit"}
-export function getRecipeAddUrl() : string {return "/recipe/add"}
-export function getLoginUrl() : string {return "/login"}
+export function getRootUrl(): string {
+    return "/"
+}
+
+export function getRecipeListUrl(): string {
+    return "/recipe/list"
+}
+
+export function getRecipeDetailUrl(id: string): string {
+    return "/recipe/" + id + "/card"
+}
+
+export function getRecipeEditUrl(id: string): string {
+    return "/recipe/" + id + "/edit"
+}
+
+export function getRecipeAddUrl(): string {
+    return "/recipe/add"
+}
+
+export function getLoginUrl(): string {
+    return "/login"
+}
+
+export function getUserUrl(): string {
+    return "/user"
+}