From afc02abd0a890c20ef61c08c04f7fbfecf3a1aa1 Mon Sep 17 00:00:00 2001
From: Marek Lenczewski <gitlab@marha.de>
Date: Sat, 11 Apr 2026 14:11:23 +0200
Subject: [PATCH] Base module

---
 .../main/java/de/haushalt/app/MainScreen.kt   | 51 +++++++++++++++++++
 .../main/java/de/haushalt/app/StartScreen.kt  |  7 +++
 frontend/src/App.vue                          | 46 ++++++++++++++++-
 frontend/src/router/index.js                  |  8 ++-
 frontend/src/style.css                        | 26 ++++++++++
 frontend/src/views/Startpage.vue              |  3 ++
 6 files changed, 139 insertions(+), 2 deletions(-)
 create mode 100644 app/app/src/main/java/de/haushalt/app/StartScreen.kt
 create mode 100644 frontend/src/views/Startpage.vue

diff --git a/app/app/src/main/java/de/haushalt/app/MainScreen.kt b/app/app/src/main/java/de/haushalt/app/MainScreen.kt
index 4339cdb..7f6250d 100644
--- a/app/app/src/main/java/de/haushalt/app/MainScreen.kt
+++ b/app/app/src/main/java/de/haushalt/app/MainScreen.kt
@@ -1,7 +1,58 @@
 package de.haushalt.app
 
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
+import androidx.compose.foundation.layout.padding
+import androidx.compose.material3.CenterAlignedTopAppBar
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Scaffold
+import androidx.compose.material3.Surface
+import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import androidx.navigation.compose.NavHost
+import androidx.navigation.compose.composable
+import androidx.navigation.compose.rememberNavController
 
+@OptIn(ExperimentalMaterial3Api::class)
 @Composable
 fun MainScreen() {
+    val navController = rememberNavController()
+    Scaffold(
+        topBar = {
+            Column {
+                Navigation()
+                Subnavigation()
+            }
+        }
+    ) { innerPadding ->
+        NavHost(
+            navController = navController,
+            startDestination = "start",
+            modifier = Modifier.padding(innerPadding)
+        ) {
+            composable("start") { StartScreen() }
+        }
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+private fun Navigation() {
+    CenterAlignedTopAppBar(
+        title = { Text("Haushalt") }
+    )
+}
+
+@Composable
+private fun Subnavigation() {
+    Surface(
+        modifier = Modifier
+            .fillMaxWidth()
+            .height(32.dp),
+        color = MaterialTheme.colorScheme.surfaceVariant
+    ) {}
 }
diff --git a/app/app/src/main/java/de/haushalt/app/StartScreen.kt b/app/app/src/main/java/de/haushalt/app/StartScreen.kt
new file mode 100644
index 0000000..ed4991d
--- /dev/null
+++ b/app/app/src/main/java/de/haushalt/app/StartScreen.kt
@@ -0,0 +1,7 @@
+package de.haushalt.app
+
+import androidx.compose.runtime.Composable
+
+@Composable
+fun StartScreen() {
+}
diff --git a/frontend/src/App.vue b/frontend/src/App.vue
index 13ee9ea..9a43bff 100644
--- a/frontend/src/App.vue
+++ b/frontend/src/App.vue
@@ -3,5 +3,49 @@ import { RouterView } from 'vue-router'
 </script>
 
 <template>
-  <RouterView />
+  <header class="navigation">
+    <div class="container">
+      <span class="brand">Haushalt</span>
+    </div>
+  </header>
+  <nav class="subnavigation">
+    <div class="container"></div>
+  </nav>
+  <main class="main-area">
+    <div class="container">
+      <RouterView />
+    </div>
+  </main>
 </template>
+
+<style scoped>
+.navigation {
+  background: var(--nav-bg);
+  border-bottom: 1px solid var(--border);
+}
+
+.navigation .container {
+  display: flex;
+  align-items: center;
+  height: 3rem;
+}
+
+.brand {
+  font-size: 1.125rem;
+  font-weight: 600;
+}
+
+.subnavigation {
+  background: var(--subnav-bg);
+  border-bottom: 1px solid var(--border);
+}
+
+.subnavigation .container {
+  height: 2rem;
+}
+
+.main-area .container {
+  padding-top: 1rem;
+  padding-bottom: 1rem;
+}
+</style>
diff --git a/frontend/src/router/index.js b/frontend/src/router/index.js
index 835241d..4621a77 100644
--- a/frontend/src/router/index.js
+++ b/frontend/src/router/index.js
@@ -2,7 +2,13 @@ import { createRouter, createWebHistory } from 'vue-router'
 
 const router = createRouter({
   history: createWebHistory(),
-  routes: [],
+  routes: [
+    {
+      path: '/',
+      name: 'start',
+      component: () => import('../views/Startpage.vue'),
+    },
+  ],
 })
 
 export default router
diff --git a/frontend/src/style.css b/frontend/src/style.css
index e69de29..2bd4d5c 100644
--- a/frontend/src/style.css
+++ b/frontend/src/style.css
@@ -0,0 +1,26 @@
+:root {
+  --bg: #ffffff;
+  --text: #1a1a1a;
+  --border: #e5e5e5;
+  --nav-bg: #f7f7f8;
+  --subnav-bg: #f0f0f2;
+  color-scheme: light dark;
+}
+
+* {
+  box-sizing: border-box;
+}
+
+body {
+  margin: 0;
+  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
+  color: var(--text);
+  background: var(--bg);
+}
+
+.container {
+  width: 100%;
+  max-width: 1280px;
+  margin: 0 auto;
+  padding: 0 1rem;
+}
diff --git a/frontend/src/views/Startpage.vue b/frontend/src/views/Startpage.vue
new file mode 100644
index 0000000..61e11d9
--- /dev/null
+++ b/frontend/src/views/Startpage.vue
@@ -0,0 +1,3 @@
+<template>
+  <div class="start-page"></div>
+</template>