feat: adaptive grid column count driven by window size class (Closes #4) (#45)

sharedUI/src/commonMain/kotlin/org/shahondin1624/lib/components/UiConstants.kt

@@ -43,4 +43,35 @@ object UiConstants {
             WindowSizeClass.Expanded -> 24.dp
         }
     }
+
+    /**
+     * Grid configuration driven by [WindowSizeClass].
+     *
+     * Determines total column count and per-item spans so that:
+     * - **Compact** (phone): 2 attribute cards / row, 1 talent card / row
+     * - **Medium** (tablet): 4 attribute cards / row, 2 talent cards / row
+     * - **Expanded** (desktop): 4 attribute cards / row, 2 talent cards / row
+     */
+    object Grid {
+        /** Total number of grid columns for the given [sizeClass]. */
+        fun totalColumns(sizeClass: WindowSizeClass): Int = when (sizeClass) {
+            WindowSizeClass.Compact -> 2
+            WindowSizeClass.Medium -> 4
+            WindowSizeClass.Expanded -> 4
+        }
+
+        /** Span occupied by a single attribute card. */
+        fun attributeSpan(sizeClass: WindowSizeClass): Int = when (sizeClass) {
+            WindowSizeClass.Compact -> 1
+            WindowSizeClass.Medium -> 1
+            WindowSizeClass.Expanded -> 1
+        }
+
+        /** Span occupied by a single talent card. */
+        fun talentSpan(sizeClass: WindowSizeClass): Int = when (sizeClass) {
+            WindowSizeClass.Compact -> 2
+            WindowSizeClass.Medium -> 2
+            WindowSizeClass.Expanded -> 2
+        }
+    }
 }

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

@@ -28,8 +28,12 @@ fun ColumnScope.AttributesPage(character: ShadowrunCharacter) {
         val gridPadding = UiConstants.Spacing.medium(windowSizeClass)
         val dividerPadding = UiConstants.Spacing.medium(windowSizeClass)
 
+        val totalColumns = UiConstants.Grid.totalColumns(windowSizeClass)
+        val attributeSpan = UiConstants.Grid.attributeSpan(windowSizeClass)
+        val talentSpan = UiConstants.Grid.talentSpan(windowSizeClass)
+
         LazyVerticalGrid(
-            columns = GridCells.Adaptive(minSize = 75.dp),
+            columns = GridCells.Fixed(totalColumns),
             state = gridState,
             modifier = Modifier.fillMaxSize().padding(gridPadding),
             horizontalArrangement = Arrangement.spacedBy(gridSpacing),
@@ -38,7 +42,7 @@ fun ColumnScope.AttributesPage(character: ShadowrunCharacter) {
             items(
                 items = character.attributes.getAllAttributes(),
                 span = {
-                    GridItemSpan(2)
+                    GridItemSpan(attributeSpan)
                 }) { attribute ->
                 Attribute(attribute)
             }
@@ -53,7 +57,7 @@ fun ColumnScope.AttributesPage(character: ShadowrunCharacter) {
             items(
                 items = character.talents.talents,
                 span = {
-                    GridItemSpan(3)
+                    GridItemSpan(talentSpan)
                 }
             ) { talent ->
                 Talent(talent, character.attributes)