feat: character header showing identity info (Closes #9) (#55)

sharedUI/src/commonMain/kotlin/org/shahondin1624/App.kt

@@ -26,6 +26,7 @@ import kotlinx.coroutines.launch
 import org.jetbrains.compose.ui.tooling.preview.Preview
 import org.shahondin1624.lib.components.TestTags
 import org.shahondin1624.lib.components.UiConstants
+import org.shahondin1624.lib.components.charactermodel.CharacterHeader
 import org.shahondin1624.lib.components.charactermodel.attributespage.AttributesPage
 import org.shahondin1624.lib.components.settings.SettingsPage
 import org.shahondin1624.model.EXAMPLE_CHARACTER
@@ -305,6 +306,8 @@ private fun MainScaffold(
                         modifier = Modifier.fillMaxSize(),
                         horizontalAlignment = Alignment.CenterHorizontally
                     ) {
+                        CharacterHeader(EXAMPLE_CHARACTER.characterData)
+                        Spacer(Modifier.height(contentPadding))
                         AttributesPage(EXAMPLE_CHARACTER)
                     }
                 }

sharedUI/src/commonMain/kotlin/org/shahondin1624/lib/components/charactermodel/CharacterHeader.kt

@@ -0,0 +1,142 @@
+package org.shahondin1624.lib.components.charactermodel
+
+import androidx.compose.foundation.layout.*
+import androidx.compose.material3.*
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.testTag
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.dp
+import org.shahondin1624.lib.components.TestTags
+import org.shahondin1624.lib.components.UiConstants
+import org.shahondin1624.model.characterdata.CharacterData
+import org.shahondin1624.theme.LocalWindowSizeClass
+import org.shahondin1624.theme.WindowSizeClass
+
+/**
+ * Character identity header showing name, metatype, concept, age, and gender.
+ * Stacks vertically on Compact, horizontal row on Expanded.
+ */
+@Composable
+fun CharacterHeader(characterData: CharacterData) {
+    val windowSizeClass = LocalWindowSizeClass.current
+    val spacing = UiConstants.Spacing.medium(windowSizeClass)
+
+    Card(
+        modifier = Modifier
+            .fillMaxWidth()
+            .testTag(TestTags.PANEL_CHARACTER_HEADER)
+    ) {
+        when (windowSizeClass) {
+            WindowSizeClass.Compact -> CompactHeader(characterData, spacing)
+            WindowSizeClass.Medium, WindowSizeClass.Expanded -> ExpandedHeader(characterData, spacing)
+        }
+    }
+}
+
+@Composable
+private fun CompactHeader(characterData: CharacterData, spacing: androidx.compose.ui.unit.Dp) {
+    Column(
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(spacing),
+        verticalArrangement = Arrangement.spacedBy(4.dp)
+    ) {
+        Text(
+            text = characterData.name,
+            style = MaterialTheme.typography.headlineMedium,
+            fontWeight = FontWeight.Bold
+        )
+
+        Row(
+            horizontalArrangement = Arrangement.spacedBy(8.dp),
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            MetatypeBadge(characterData.metatype.name)
+            Text(
+                text = characterData.concept,
+                style = MaterialTheme.typography.bodyLarge,
+                color = MaterialTheme.colorScheme.onSurfaceVariant
+            )
+        }
+
+        Row(
+            horizontalArrangement = Arrangement.spacedBy(16.dp)
+        ) {
+            DetailChip(label = "Age", value = characterData.age.toString())
+            DetailChip(label = "Gender", value = characterData.gender)
+        }
+    }
+}
+
+@Composable
+private fun ExpandedHeader(characterData: CharacterData, spacing: androidx.compose.ui.unit.Dp) {
+    Row(
+        modifier = Modifier
+            .fillMaxWidth()
+            .padding(spacing),
+        horizontalArrangement = Arrangement.SpaceBetween,
+        verticalAlignment = Alignment.CenterVertically
+    ) {
+        // Left: Name and metatype
+        Row(
+            horizontalArrangement = Arrangement.spacedBy(12.dp),
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Text(
+                text = characterData.name,
+                style = MaterialTheme.typography.headlineMedium,
+                fontWeight = FontWeight.Bold
+            )
+            MetatypeBadge(characterData.metatype.name)
+        }
+
+        // Center: Concept
+        Text(
+            text = characterData.concept,
+            style = MaterialTheme.typography.bodyLarge,
+            color = MaterialTheme.colorScheme.onSurfaceVariant
+        )
+
+        // Right: Age and gender
+        Row(
+            horizontalArrangement = Arrangement.spacedBy(16.dp)
+        ) {
+            DetailChip(label = "Age", value = characterData.age.toString())
+            DetailChip(label = "Gender", value = characterData.gender)
+        }
+    }
+}
+
+@Composable
+private fun MetatypeBadge(metatype: String) {
+    Surface(
+        shape = MaterialTheme.shapes.small,
+        color = MaterialTheme.colorScheme.secondaryContainer,
+        contentColor = MaterialTheme.colorScheme.onSecondaryContainer
+    ) {
+        Text(
+            text = metatype,
+            modifier = Modifier.padding(horizontal = 8.dp, vertical = 4.dp),
+            style = MaterialTheme.typography.labelMedium,
+            fontWeight = FontWeight.Medium
+        )
+    }
+}
+
+@Composable
+private fun DetailChip(label: String, value: String) {
+    Row(horizontalArrangement = Arrangement.spacedBy(4.dp)) {
+        Text(
+            text = "$label:",
+            style = MaterialTheme.typography.bodySmall,
+            color = MaterialTheme.colorScheme.onSurfaceVariant
+        )
+        Text(
+            text = value,
+            style = MaterialTheme.typography.bodySmall,
+            fontWeight = FontWeight.Medium
+        )
+    }
+}