refactor(design-system): consolidate components and standardize naming with Ms prefix

- Removed redundant files: `AppFooter`, `AppHeader`, `AppScaffold`, `LoadingIndicator`, `MeldestelleButton`, `MeldestelleTextField`, `DashboardCard`.
- Introduced `MsFooter`, `MsHeader`, `MsScaffold`, `MsLoadingIndicator`, `MsButton`, `MsTextField`, `MsCard` with standardized implementation and naming.
- Updated references in `profile-feature` and `ping-feature` to use the new components.
- Aligned with roadmap goals for a consistent, reusable, and high-density design system.

Signed-off-by: Stefan Mogeritsch <stefan.mo.co@gmail.com>

frontend/core/design-system/src/commonMain/kotlin/at/mocode/frontend/core/designsystem/components/Buttons.kt

@@ -1,44 +0,0 @@
-package at.mocode.frontend.core.designsystem.components
-
-import androidx.compose.foundation.layout.PaddingValues
-import androidx.compose.foundation.layout.height
-import androidx.compose.material3.Button
-import androidx.compose.material3.ButtonDefaults
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Text
-import androidx.compose.runtime.Composable
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.unit.dp
-import at.mocode.frontend.core.designsystem.theme.Dimens
-
-/**
- * Ein kompakter Button für unsere High-Density UI.
- *
- * Warum ein eigener Button?
- * Der Standard Material3 Button ist sehr hoch (40dp+) und hat viel Padding.
- * Das verschwendet Platz in Tabellen oder Toolbars.
- * Unser 'DenseButton' ist fix 32dp hoch- und hat weniger Innenabstand.
- */
-@Composable
-fun DenseButton(
-  text: String,
-  onClick: () -> Unit,
-  modifier: Modifier = Modifier,
-  enabled: Boolean = true,
-  containerColor: Color = MaterialTheme.colorScheme.primary
-) {
-  Button(
-    onClick = onClick,
-    enabled = enabled,
-    modifier = modifier.height(32.dp), // Fixe, kompakte Höhe
-    shape = MaterialTheme.shapes.small, // Nutzt unsere 4dp Rundung
-    colors = ButtonDefaults.buttonColors(containerColor = containerColor),
-    contentPadding = PaddingValues(horizontal = Dimens.SpacingM, vertical = 0.dp) // Wenig Padding
-  ) {
-    Text(
-      text = text,
-      style = MaterialTheme.typography.labelMedium // Kleinere Schrift
-    )
-  }
-}

frontend/core/design-system/src/commonMain/kotlin/at/mocode/frontend/core/designsystem/components/MsButton.kt

@@ -17,7 +17,7 @@ enum class ButtonSize {
 }
 
 @Composable
-fun MeldestelleButton(
+fun MsButton(
   text: String,
   onClick: () -> Unit,
   modifier: Modifier = Modifier,
@@ -96,7 +96,7 @@ fun PrimaryButton(
   enabled: Boolean = true,
   isLoading: Boolean = false,
   fullWidth: Boolean = false
-) = MeldestelleButton(
+) = MsButton(
   text = text,
   onClick = onClick,
   modifier = modifier,
@@ -115,7 +115,7 @@ fun SecondaryButton(
   enabled: Boolean = true,
   isLoading: Boolean = false,
   fullWidth: Boolean = false
-) = MeldestelleButton(
+) = MsButton(
   text = text,
   onClick = onClick,
   modifier = modifier,

frontend/core/design-system/src/commonMain/kotlin/at/mocode/frontend/core/designsystem/components/MsCard.kt

@@ -20,7 +20,7 @@ import at.mocode.frontend.core.designsystem.theme.Dimens
  * Im Enterprise-Kontext sind flache Cards mit dünnem Border (1px) oft sauberer.
  */
 @Composable
-fun DashboardCard(
+fun MsCard(
   modifier: Modifier = Modifier,
   content: @Composable ColumnScope.() -> Unit
 ) {

frontend/core/design-system/src/commonMain/kotlin/at/mocode/frontend/core/designsystem/components/MsFooter.kt

@@ -13,7 +13,7 @@ import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 
 @Composable
-fun AppFooter() {
+fun MsFooter() {
   Box(
     modifier = Modifier
       .fillMaxWidth()

frontend/core/design-system/src/commonMain/kotlin/at/mocode/frontend/core/designsystem/components/MsHeader.kt

@@ -12,7 +12,7 @@ import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
 
 @Composable
-fun AppHeader(
+fun MsHeader(
   isAuthenticated: Boolean,
   username: String?,
   onNavigateToLogin: (() -> Unit)? = null,

frontend/core/design-system/src/commonMain/kotlin/at/mocode/frontend/core/designsystem/components/MsLoadingIndicator.kt

@@ -1,7 +1,10 @@
 package at.mocode.frontend.core.designsystem.components
 
 import androidx.compose.foundation.layout.*
-import androidx.compose.material3.*
+import androidx.compose.material3.CircularProgressIndicator
+import androidx.compose.material3.LinearProgressIndicator
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -13,7 +16,7 @@ enum class LoadingSize {
 }
 
 @Composable
-fun LoadingIndicator(
+fun MsLoadingIndicator(
   modifier: Modifier = Modifier,
   size: LoadingSize = LoadingSize.MEDIUM,
   message: String? = null
@@ -61,7 +64,7 @@ fun FullScreenLoading(
     modifier = modifier.fillMaxSize(),
     contentAlignment = Alignment.Center
   ) {
-    LoadingIndicator(
+    MsLoadingIndicator(
       size = LoadingSize.LARGE,
       message = message
     )
@@ -79,7 +82,7 @@ fun InlineLoading(
     verticalAlignment = Alignment.CenterVertically,
     horizontalArrangement = Arrangement.Center
   ) {
-    LoadingIndicator(
+    MsLoadingIndicator(
       size = LoadingSize.SMALL,
       message = message
     )

frontend/core/design-system/src/commonMain/kotlin/at/mocode/frontend/core/designsystem/components/MsScaffold.kt

@@ -10,13 +10,13 @@ import androidx.compose.ui.Modifier
 @Suppress("unused")
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
-fun AppScaffold(
+fun MsScaffold(
   header: @Composable () -> Unit = {
-    AppHeader(isAuthenticated = false, username = null)
+    MsHeader(isAuthenticated = false, username = null)
   },
   content: @Composable (PaddingValues) -> Unit,
   footer: @Composable () -> Unit = {
-    AppFooter()
+    MsFooter()
   },
 ) {
   Scaffold(

frontend/core/design-system/src/commonMain/kotlin/at/mocode/frontend/core/designsystem/components/MsTextField.kt

@@ -16,7 +16,7 @@ import androidx.compose.ui.text.input.VisualTransformation
 import androidx.compose.ui.unit.dp
 
 @Composable
-fun MeldestelleTextField(
+fun MsTextField(
   value: String,
   onValueChange: (String) -> Unit,
   modifier: Modifier = Modifier,
@@ -109,7 +109,7 @@ fun MeldestellePasswordField(
 ) {
   var passwordVisible by remember { mutableStateOf(false) }
 
-  MeldestelleTextField(
+  MsTextField(
     value = value,
     onValueChange = onValueChange,
     modifier = modifier,
@@ -152,7 +152,7 @@ fun MeldestelleEmailField(
   imeAction: ImeAction = ImeAction.Next,
   keyboardActions: KeyboardActions = KeyboardActions.Default
 ) {
-  MeldestelleTextField(
+  MsTextField(
     value = value,
     onValueChange = onValueChange,
     modifier = modifier,