feat: add robots.txt and sitemap.xml routes for SEO optimization

- Implemented a new route for robots.txt to control crawler access.
- Added a sitemap.xml route to provide search engines with a list of site URLs.
- Included functions for URL normalization and XML escaping to ensure proper formatting.

android-app/app/src/main/java/de/harheimertc/ui/components/AppNavigationHeader.kt

@@ -1,10 +1,12 @@
 package de.harheimertc.ui.components
 
 import androidx.compose.foundation.Image
+import androidx.compose.foundation.ScrollState
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.horizontalScroll
 import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.Spacer
@@ -72,32 +74,62 @@ private fun CompactNavigation(
     onNavigate: (String) -> Unit,
     navigationState: NavigationUiState = NavigationUiState(),
 ) {
-    val section = menuSection(selectedRoute)
+    val routeSection = menuSection(selectedRoute)
+    val sectionOverride = androidx.compose.runtime.remember { androidx.compose.runtime.mutableStateOf<MenuSection?>(null) }
+    val section = routeSection ?: sectionOverride.value
     val subItems = submenu(section, navigationState)
     var cmsExpanded = androidx.compose.runtime.remember { androidx.compose.runtime.mutableStateOf(false) }
     val navigateAndClose: (String) -> Unit = { route -> cmsExpanded.value = false; onNavigate(route) }
+    val mainScroll = rememberScrollState()
+    val subScroll = rememberScrollState()
+    val cmsSubScroll = rememberScrollState()
 
     BrandRow(onLogin = { onNavigate(Destinations.Login.route) })
-    Row(
-        modifier = Modifier.horizontalScroll(rememberScrollState()),
-        horizontalArrangement = Arrangement.spacedBy(4.dp),
-    ) {
-        CompactLink("Start", Destinations.Home.route, selectedRoute, onNavigate)
-        CompactLink("Verein", Destinations.VereinAbout.route, selectedRoute, onNavigate)
-        CompactLink("Mannschaften", Destinations.Mannschaften.route, selectedRoute, onNavigate)
-        CompactLink("Training", Destinations.Training.route, selectedRoute, onNavigate)
-        CompactLink("Termine", Destinations.Termine.route, selectedRoute, onNavigate)
-        CompactLink("Spielplan", Destinations.Spielplan.route, selectedRoute, onNavigate)
-        CompactLink("Newsletter", Destinations.NewsletterSubscribe.route, selectedRoute, onNavigate)
-        if (navigationState.showGallery) {
-            CompactLink("Galerie", Destinations.Gallery.route, selectedRoute, onNavigate)
+    Box(modifier = Modifier.fillMaxWidth()) {
+        Row(
+            modifier = Modifier.horizontalScroll(mainScroll),
+            horizontalArrangement = Arrangement.spacedBy(4.dp),
+        ) {
+            CompactLink("Start", Destinations.Home.route, selectedRoute, onNavigate) { sectionOverride.value = null }
+            CompactSectionLink("Verein", MenuSection.VEREIN, section) { sectionOverride.value = MenuSection.VEREIN }
+            CompactSectionLink("Mannschaften", MenuSection.MANNSCHAFTEN, section) { sectionOverride.value = MenuSection.MANNSCHAFTEN }
+            CompactSectionLink("Training", MenuSection.TRAINING, section) { sectionOverride.value = MenuSection.TRAINING }
+            CompactLink("Termine", Destinations.Termine.route, selectedRoute, onNavigate) { sectionOverride.value = null }
+            CompactLink("Spielplan", Destinations.Spielplan.route, selectedRoute, onNavigate) { sectionOverride.value = MenuSection.MANNSCHAFTEN }
+            CompactSectionLink("Newsletter", MenuSection.NEWSLETTER, section) { sectionOverride.value = MenuSection.NEWSLETTER }
+            if (navigationState.showGallery) {
+                CompactLink("Galerie", Destinations.Gallery.route, selectedRoute, onNavigate) { sectionOverride.value = MenuSection.VEREIN }
+            }
+            if (navigationState.loggedIn) {
+                CompactSectionLink("Intern", MenuSection.INTERN, section) { sectionOverride.value = MenuSection.INTERN }
+            }
+            CompactLink("Kontakt", Destinations.Contact.route, selectedRoute, onNavigate) { sectionOverride.value = null }
+            if (navigationState.isAdmin || navigationState.canAccessNewsletter || navigationState.canAccessContactRequests) {
+                CompactSectionLink("CMS", MenuSection.INTERN, section) { sectionOverride.value = MenuSection.INTERN }
+            }
         }
-        if (navigationState.loggedIn) {
-            CompactLink("Intern", Destinations.MemberArea.route, selectedRoute, onNavigate)
+
+        if (mainScroll.canScrollBackward) {
+            Text(
+                "◀",
+                color = Color(0xFFD4D4D8),
+                style = MaterialTheme.typography.labelSmall,
+                modifier = Modifier
+                    .align(Alignment.CenterStart)
+                    .background(Color(0x66000000), RoundedCornerShape(8.dp))
+                    .padding(horizontal = 4.dp, vertical = 2.dp),
+            )
         }
-        CompactLink("Kontakt", Destinations.Contact.route, selectedRoute, onNavigate)
-        if (navigationState.isAdmin || navigationState.canAccessNewsletter || navigationState.canAccessContactRequests) {
-            CompactLink("CMS", Destinations.Cms.route, selectedRoute, onNavigate)
+        if (mainScroll.canScrollForward) {
+            Text(
+                "▶",
+                color = Color(0xFFD4D4D8),
+                style = MaterialTheme.typography.labelSmall,
+                modifier = Modifier
+                    .align(Alignment.CenterEnd)
+                    .background(Color(0x66000000), RoundedCornerShape(8.dp))
+                    .padding(horizontal = 4.dp, vertical = 2.dp),
+            )
         }
     }
 
@@ -110,7 +142,7 @@ private fun CompactNavigation(
     Row(
         modifier = Modifier
             .fillMaxWidth()
-            .horizontalScroll(rememberScrollState())
+            .horizontalScroll(subScroll)
             .padding(top = 3.dp),
         horizontalArrangement = Arrangement.spacedBy(4.dp),
     ) {
@@ -126,12 +158,15 @@ private fun CompactNavigation(
             }
         }
     }
+    if (subItems.isNotEmpty()) {
+        ScrollHintRow(subScroll)
+    }
 
     if (cmsExpanded.value && cmsChildren.isNotEmpty()) {
         Row(
             modifier = Modifier
                 .fillMaxWidth()
-                .horizontalScroll(rememberScrollState())
+                .horizontalScroll(cmsSubScroll)
                 .padding(top = 6.dp, bottom = 3.dp),
             horizontalArrangement = Arrangement.spacedBy(8.dp),
         ) {
@@ -139,6 +174,31 @@ private fun CompactNavigation(
                 SubLink(child.label, child.route == selectedRoute) { onNavigate(child.route) }
             }
         }
+        ScrollHintRow(cmsSubScroll)
+    }
+}
+
+@Composable
+private fun CompactSectionLink(
+    label: String,
+    section: MenuSection,
+    activeSection: MenuSection?,
+    modifier: Modifier = Modifier,
+    onSelect: () -> Unit,
+) {
+    Surface(
+        color = if (activeSection == section) Primary600 else Color.Transparent,
+        shape = RoundedCornerShape(8.dp),
+        modifier = modifier.clickable { onSelect() },
+    ) {
+        Text(
+            label,
+            color = if (activeSection == section) Color.White else Color(0xFFD4D4D8),
+            textAlign = TextAlign.Center,
+            style = MaterialTheme.typography.labelMedium,
+            modifier = Modifier.padding(vertical = 9.dp, horizontal = 2.dp),
+            maxLines = 1,
+        )
     }
 }
 
@@ -285,11 +345,15 @@ private fun CompactLink(
     selectedRoute: String?,
     onNavigate: (String) -> Unit,
     modifier: Modifier = Modifier,
+    beforeNavigate: () -> Unit = {},
 ) {
     Surface(
         color = if (route == selectedRoute) Primary600 else Color.Transparent,
         shape = RoundedCornerShape(8.dp),
-        modifier = modifier.clickable { onNavigate(route) },
+        modifier = modifier.clickable {
+            beforeNavigate()
+            onNavigate(route)
+        },
     ) {
         Text(
             label,
@@ -302,6 +366,30 @@ private fun CompactLink(
     }
 }
 
+@Composable
+private fun ScrollHintRow(scrollState: ScrollState) {
+    if (!scrollState.canScrollBackward && !scrollState.canScrollForward) return
+
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(top = 2.dp),
+        horizontalArrangement = Arrangement.SpaceBetween,
+        verticalAlignment = Alignment.CenterVertically,
+    ) {
+        Text(
+            if (scrollState.canScrollBackward) "◀" else "",
+            color = Color(0xFFD4D4D8),
+            style = MaterialTheme.typography.labelSmall,
+        )
+        Text(
+            if (scrollState.canScrollForward) "▶" else "",
+            color = Color(0xFFD4D4D8),
+            style = MaterialTheme.typography.labelSmall,
+        )
+    }
+}
+
 @Composable
 private fun SubLink(label: String, selected: Boolean, onClick: () -> Unit) {
     Surface(

android-app/gradle.properties

@@ -5,11 +5,11 @@ org.gradle.workers.max=2
 LOCAL_API_BASE_URL=https://harheimertc.tsschulz.de/
 
 # Production backend for Play Store build variant
-PRODUCTION_API_BASE_URL=https://harheimertc.tsschulz.de/
+PRODUCTION_API_BASE_URL=https://harheimertc.de/
 
 # Android app versioning for Play Store uploads
-ANDROID_VERSION_CODE=17
-ANDROID_VERSION_NAME=0.9.12
+ANDROID_VERSION_CODE=18
+ANDROID_VERSION_NAME=0.9.13
 
 # Temporary hotfix: disable R8 minification for release to avoid Retrofit generic signature stripping.
 RELEASE_MINIFY_ENABLED=false