add ignore

.gitattributes

@@ -0,0 +1,3 @@
+/gradlew text eol=lf
+*.bat text eol=crlf
+*.jar binary

.gitignore

@@ -0,0 +1,94 @@
+# ----------------------------------------
+# Systemdateien
+# ----------------------------------------
+.DS_Store
+Thumbs.db
+
+# ----------------------------------------
+# Logdateien
+# ----------------------------------------
+*.log
+
+# ----------------------------------------
+# Node.js / npm
+# ----------------------------------------
+node_modules/
+package-lock.json
+
+# ----------------------------------------
+# Gradle
+# ----------------------------------------
+.gradle/
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+# ----------------------------------------
+# IntelliJ IDEA
+# ----------------------------------------
+.idea/
+*.iml
+*.iws
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+# ----------------------------------------
+# Eclipse / Spring Tool Suite (STS)
+# ----------------------------------------
+.apt_generated/
+.classpath
+.factorypath
+.project
+.settings/
+.springBeans
+.sts4-cache/
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+# ----------------------------------------
+# NetBeans
+# ----------------------------------------
+nbproject/private/
+nbbuild/
+dist/
+nbdist/
+.nb-gradle/
+
+# ----------------------------------------
+# VS Code
+# ----------------------------------------
+.vscode/
+
+# ----------------------------------------
+# Vaadin / Vite
+# ----------------------------------------
+frontend/generated/
+vite.generated.ts
+types.d.ts
+target/
+
+# ----------------------------------------
+# Docker
+# ----------------------------------------
+*.env
+.env.local
+docker-compose.override.yml
+
+# ----------------------------------------
+# Test-Coverage
+# ----------------------------------------
+coverage/
+*.lcov
+
+# ----------------------------------------
+# Temporäre / Backup-Dateien
+# ----------------------------------------
+*~
+*.swp
+*.swo
+*.bak
+*.tmp

Dockerfile

@@ -0,0 +1,4 @@
+FROM ubuntu:latest
+LABEL authors="me"
+
+ENTRYPOINT ["top", "-b"]

build.gradle

@@ -0,0 +1,52 @@
+plugins {
+    id 'java'
+    id 'org.springframework.boot' version '3.5.3'
+    id 'io.spring.dependency-management' version '1.1.7'
+    id 'com.vaadin' version '24.8.2'
+}
+
+group = 'de.nilzbu'
+version = '0.0.1-SNAPSHOT'
+
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(17)
+    }
+}
+
+configurations {
+    compileOnly {
+        extendsFrom annotationProcessor
+    }
+}
+
+repositories {
+    mavenCentral()
+}
+
+ext {
+    set('vaadinVersion', "24.8.2")
+}
+
+dependencies {
+    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+    implementation 'org.springframework.boot:spring-boot-starter-security'
+    implementation 'com.vaadin:vaadin-spring-boot-starter'
+    compileOnly 'org.projectlombok:lombok'
+    developmentOnly 'org.springframework.boot:spring-boot-devtools'
+    developmentOnly 'org.springframework.boot:spring-boot-docker-compose'
+    annotationProcessor 'org.projectlombok:lombok'
+    testImplementation 'org.springframework.boot:spring-boot-starter-test'
+    testImplementation 'org.springframework.security:spring-security-test'
+    testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
+}
+
+dependencyManagement {
+    imports {
+        mavenBom "com.vaadin:vaadin-bom:${vaadinVersion}"
+    }
+}
+
+tasks.named('test') {
+    useJUnitPlatform()
+}

compose.yml

@@ -0,0 +1,31 @@
+services:
+  db:
+    image: mysql:8
+    restart: always
+    container_name: mytimetracker-db
+    environment:
+      MYSQL_DATABASE: mytimetracker
+      MYSQL_ROOT_PASSWORD: root
+      MYSQL_USER: appuser
+      MYSQL_PASSWORD: apppass
+    ports:
+      - "3306:3306"
+    volumes:
+      - db_data:/var/lib/mysql
+
+  app:
+    build: .
+    container_name: mytimetracker-app
+    depends_on:
+      - db
+    ports:
+      - "8080:8080"
+    environment:
+      SPRING_DATASOURCE_URL: jdbc:mysql://db:3306/mytimetracker?useSSL=false&allowPublicKeyRetrieval=true&serverTimezone=UTC
+      SPRING_DATASOURCE_USERNAME: appuser
+      SPRING_DATASOURCE_PASSWORD: apppass
+      SPRING_JPA_HIBERNATE_DDL_AUTO: update
+    restart: always
+
+volumes:
+  db_data:

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14.2-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,251 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH="\\\"\\\""
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,94 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'MyTimeTracker'

src/main/frontend/chart-helper.js

@@ -0,0 +1 @@
+src/main/frontend/chart-helper.js

src/main/frontend/themes/myTheme/styles.css

@@ -0,0 +1,32 @@
+:root {
+    /* Hintergrund- und Textfarben */
+    --lumo-base-color: hsl(0, 0%, 8%);            /* Sehr dunkles Grau (fast schwarz) */
+    --lumo-body-text-color: hsl(150, 30%, 90%);    /* Hellgrünliches Weiß für Text */
+
+    /* Primärfarbe in grün */
+    --lumo-primary-color: hsl(145, 80%, 40%);
+    --lumo-primary-color-50pct: hsla(145, 80%, 40%, 0.5);
+    --lumo-primary-color-10pct: hsla(145, 80%, 40%, 0.1);
+
+    /* Sekundärfarben / Akzente */
+    --lumo-success-color: hsl(145, 80%, 35%);
+    --lumo-error-color: hsl(0, 80%, 60%);
+    --lumo-border-radius: 6px;
+}
+
+/* Hintergrundfarbe für Schaltflächen */
+[theme~="primary"] {
+    background-color: var(--lumo-primary-color);
+    color: white;
+}
+
+vaadin-button {
+    border-radius: var(--lumo-border-radius);
+}
+
+/* Grid-Styling */
+vaadin-grid {
+    border-radius: var(--lumo-border-radius);
+    background-color: var(--lumo-base-color);
+    color: var(--lumo-body-text-color);
+}

src/main/java/de/nilzbu/mytimetracker/MyTimeTrackerApplication.java

@@ -0,0 +1,13 @@
+package de.nilzbu.mytimetracker;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class MyTimeTrackerApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(MyTimeTrackerApplication.class, args);
+    }
+
+}

src/main/java/de/nilzbu/mytimetracker/config/AppShellConfig.java

@@ -0,0 +1,8 @@
+package de.nilzbu.mytimetracker.config;
+
+import com.vaadin.flow.component.page.AppShellConfigurator;
+import com.vaadin.flow.theme.Theme;
+
+@Theme(value = "my-theme") // oder dein tatsächlicher Theme-Name
+public class AppShellConfig implements AppShellConfigurator {
+}

src/main/java/de/nilzbu/mytimetracker/config/DataInitializer.java

@@ -0,0 +1,4 @@
+package de.nilzbu.mytimetracker.config;
+
+public class DataInitializer {
+}

src/main/java/de/nilzbu/mytimetracker/config/SeedDataGenerator.java

@@ -0,0 +1,4 @@
+package de.nilzbu.mytimetracker.config;
+
+public class SeedDataGenerator {
+}

src/main/java/de/nilzbu/mytimetracker/model/DayStatus.java

@@ -0,0 +1,4 @@
+package de.nilzbu.mytimetracker.model;
+
+public class DayStatus {
+}

src/main/java/de/nilzbu/mytimetracker/model/TimeEntry.java

@@ -0,0 +1,4 @@
+package de.nilzbu.mytimetracker.model;
+
+public class TimeEntry {
+}

src/main/java/de/nilzbu/mytimetracker/model/User.java

@@ -0,0 +1,4 @@
+package de.nilzbu.mytimetracker.model;
+
+public class User {
+}

src/main/java/de/nilzbu/mytimetracker/repository/TimeEntryRepository.java

@@ -0,0 +1,4 @@
+package de.nilzbu.mytimetracker.repository;
+
+public class TimeEntryRepository {
+}

src/main/java/de/nilzbu/mytimetracker/repository/UserRepository.java

@@ -0,0 +1,4 @@
+package de.nilzbu.mytimetracker.repository;
+
+public class UserRepository {
+}

src/main/java/de/nilzbu/mytimetracker/security/SecurityConfig.java

@@ -0,0 +1,4 @@
+package de.nilzbu.mytimetracker.security;
+
+public class SecurityConfig {
+}

src/main/java/de/nilzbu/mytimetracker/security/UserDetailsServiceImpl.java

@@ -0,0 +1,4 @@
+package de.nilzbu.mytimetracker.security;
+
+public class UserDetailsServiceImpl {
+}

src/main/java/de/nilzbu/mytimetracker/service/TimeEntryService.java

@@ -0,0 +1,4 @@
+package de.nilzbu.mytimetracker.service;
+
+public class TimeEntryService {
+}

src/main/java/de/nilzbu/mytimetracker/service/UserService.java

@@ -0,0 +1,4 @@
+package de.nilzbu.mytimetracker.service;
+
+public class UserService {
+}

src/main/java/de/nilzbu/mytimetracker/ui/component/ChartJsComponent.java

@@ -0,0 +1,4 @@
+package de.nilzbu.mytimetracker.ui.component;
+
+public class ChartJsComponent {
+}

src/main/java/de/nilzbu/mytimetracker/ui/layout/MainLayout.java

@@ -0,0 +1,48 @@
+package de.nilzbu.mytimetracker.ui;
+
+import com.vaadin.flow.component.applayout.AppLayout;
+import com.vaadin.flow.component.html.H1;
+import com.vaadin.flow.component.orderedlayout.HorizontalLayout;
+import com.vaadin.flow.router.RouterLink;
+import com.vaadin.flow.component.button.Button;
+import com.vaadin.flow.server.auth.AccessAnnotationChecker;
+import com.vaadin.flow.component.orderedlayout.FlexComponent;
+import com.vaadin.flow.component.html.Span;
+import com.vaadin.flow.router.PageTitle;
+import jakarta.annotation.security.PermitAll;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.security.web.authentication.logout.SecurityContextLogoutHandler;
+
+@PermitAll
+public class MainLayout extends AppLayout {
+
+    public MainLayout() {
+        createHeader();
+    }
+
+    private void createHeader() {
+        H1 logo = new H1("My Time Tracker");
+        logo.getStyle().set("font-size", "var(--lumo-font-size-l)").set("margin", "0");
+
+        RouterLink homeLink = new RouterLink("Startseite", MainView.class);
+        homeLink.getStyle().set("margin-left", "2em");
+
+        Button logout = new Button("Logout", e -> {
+            SecurityContextLogoutHandler logoutHandler = new SecurityContextLogoutHandler();
+            logoutHandler.logout(
+                    null,
+                    SecurityContextHolder.getContext().getAuthentication(),
+                    null
+            );
+            getUI().ifPresent(ui -> ui.getPage().setLocation("/login"));
+        });
+
+        HorizontalLayout header = new HorizontalLayout(logo, homeLink, logout);
+        header.setDefaultVerticalComponentAlignment(FlexComponent.Alignment.CENTER);
+        header.setWidthFull();
+        header.setPadding(true);
+        header.setSpacing(true);
+
+        addToNavbar(header);
+    }
+}

src/main/java/de/nilzbu/mytimetracker/ui/view/LoginView.java

@@ -0,0 +1,22 @@
+package de.nilzbu.mytimetracker.ui;
+
+import com.vaadin.flow.component.html.H2;
+import com.vaadin.flow.component.login.LoginForm;
+import com.vaadin.flow.component.login.LoginI18n;
+import com.vaadin.flow.component.orderedlayout.VerticalLayout;
+import com.vaadin.flow.router.Route;
+
+@Route("login")
+public class LoginView extends VerticalLayout {
+
+    public LoginView() {
+        setSizeFull();
+        setAlignItems(Alignment.CENTER);
+        setJustifyContentMode(JustifyContentMode.CENTER);
+
+        LoginForm login = new LoginForm();
+        login.setAction("login"); // wichtig für Spring Security
+
+        add(new H2("My Time Tracker – Anmeldung"), login);
+    }
+}

src/main/java/de/nilzbu/mytimetracker/ui/view/MainView.java

@@ -0,0 +1,29 @@
+package de.nilzbu.mytimetracker.ui;
+
+import com.vaadin.flow.component.html.H1;
+import com.vaadin.flow.component.html.Paragraph;
+import com.vaadin.flow.component.orderedlayout.VerticalLayout;
+import com.vaadin.flow.router.Route;
+import jakarta.annotation.security.PermitAll;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.context.SecurityContextHolder;
+
+@Route("")
+@PermitAll
+public class MainView extends VerticalLayout {
+
+    public MainView() {
+        setSizeFull();
+        setPadding(true);
+        setSpacing(true);
+
+        Authentication auth = SecurityContextHolder.getContext().getAuthentication();
+        String username = (auth != null) ? auth.getName() : "unbekannt";
+
+        add(
+                new H1("Willkommen, " + username + "!"),
+                new Paragraph("Dies ist Ihr Arbeitszeit-Dashboard."),
+                new Paragraph("Fügen Sie hier später Navigation, Statistiken oder Schnellzugriffe hinzu.")
+        );
+    }
+}

src/main/java/de/nilzbu/mytimetracker/ui/view/TimeEntryView.java

@@ -0,0 +1,4 @@
+package de.nilzbu.mytimetracker.ui.view;
+
+public class TimeEntryView {
+}

src/main/java/de/nilzbu/mytimetracker/ui/view/UserAdminView.java

@@ -0,0 +1,4 @@
+package de.nilzbu.mytimetracker.ui.view;
+
+public class UserAdminView {
+}

src/main/resources/application.properties

@@ -0,0 +1,2 @@
+vaadin.launch-browser=true
+spring.application.name=MyTimeTracker

src/test/java/de/nilzbu/mytimetracker/MyTimeTrackerApplicationTests.java

@@ -0,0 +1,13 @@
+package de.nilzbu.mytimetracker;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class MyTimeTrackerApplicationTests {
+
+    @Test
+    void contextLoads() {
+    }
+
+}