fix: 统一运动历史空态文字颜色并补充页面预览与顺序断言

app/src/main/java/com/placeholder/ringhealth/feature/workout/WorkoutHistoryScreen.kt

@@ -15,12 +15,16 @@ import androidx.compose.runtime.getValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.placeholder.ringhealth.AppViewModelProvider
 import com.placeholder.ringhealth.R
 import com.placeholder.ringhealth.core.designsystem.MetricGreen
+import com.placeholder.ringhealth.core.designsystem.RingHealthTheme
+import com.placeholder.ringhealth.core.designsystem.TextSecondary
+import com.placeholder.ringhealth.domain.model.WorkoutRecord
 
 /** 运动历史子页：展示全部运动记录。 */
 @Composable
@@ -29,7 +33,15 @@ fun WorkoutHistoryScreen(
     viewModel: WorkoutViewModel = viewModel(factory = AppViewModelProvider.Factory),
 ) {
     val state by viewModel.uiState.collectAsStateWithLifecycle()
+    WorkoutHistoryContent(state = state, modifier = modifier)
+}
 
+/** 无状态运动历史内容，便于 Preview。 */
+@Composable
+private fun WorkoutHistoryContent(
+    state: WorkoutUiState,
+    modifier: Modifier = Modifier,
+) {
     // 必须先判 loading 再判空（ledger Ruling R25）：Mock 仓库有 200ms 延迟，
     // records 在加载完成前就是 emptyList，若先判空会先闪一下「暂无运动记录」，
     // 数据到了再跳成列表 —— 用户看到的是「明明有记录却说没有」。
@@ -47,7 +59,7 @@ fun WorkoutHistoryScreen(
             Text(
                 text = stringResource(R.string.workout_empty),
                 style = MaterialTheme.typography.bodyMedium,
-                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                color = TextSecondary,
             )
         }
         return
@@ -62,3 +74,34 @@ fun WorkoutHistoryScreen(
         }
     }
 }
+
+/** 预览入口：以固定示例数据渲染 [WorkoutHistoryContent]，便于在 IDE 中免真机查看历史页效果。 */
+@Preview(showBackground = true)
+@Composable
+private fun WorkoutHistoryContentPreview() {
+    RingHealthTheme {
+        WorkoutHistoryContent(
+            state = WorkoutUiState(
+                loading = false,
+                records = listOf(
+                    WorkoutRecord(
+                        id = "preview-0",
+                        type = "户外跑步",
+                        startTime = 1_757_000_000_000L,
+                        durationMinutes = 42,
+                        distanceKm = 5.20,
+                        calories = 286,
+                    ),
+                    WorkoutRecord(
+                        id = "preview-1",
+                        type = "健走",
+                        startTime = 1_756_900_000_000L,
+                        durationMinutes = 31,
+                        distanceKm = 2.80,
+                        calories = 143,
+                    ),
+                ),
+            ),
+        )
+    }
+}

app/src/main/java/com/placeholder/ringhealth/feature/workout/WorkoutScreen.kt

@@ -23,6 +23,7 @@ import androidx.compose.runtime.getValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewmodel.compose.viewModel
@@ -34,6 +35,7 @@ import com.placeholder.ringhealth.core.common.formatDate
 import com.placeholder.ringhealth.core.common.formatDistance
 import com.placeholder.ringhealth.core.common.formatDuration
 import com.placeholder.ringhealth.core.designsystem.MetricGreen
+import com.placeholder.ringhealth.core.designsystem.RingHealthTheme
 import com.placeholder.ringhealth.core.designsystem.TextSecondary
 import com.placeholder.ringhealth.core.designsystem.component.HealthCard
 import com.placeholder.ringhealth.core.designsystem.component.SectionHeader
@@ -139,3 +141,35 @@ internal fun WorkoutRecordCard(record: WorkoutRecord, modifier: Modifier = Modif
         }
     }
 }
+
+/** 预览入口：以固定示例数据渲染 [WorkoutContent]，便于在 IDE 中免真机查看运动页效果。 */
+@Preview(showBackground = true)
+@Composable
+private fun WorkoutContentPreview() {
+    RingHealthTheme {
+        WorkoutContent(
+            state = WorkoutUiState(
+                loading = false,
+                records = listOf(
+                    WorkoutRecord(
+                        id = "preview-0",
+                        type = "户外跑步",
+                        startTime = 1_757_000_000_000L,
+                        durationMinutes = 42,
+                        distanceKm = 5.20,
+                        calories = 286,
+                    ),
+                    WorkoutRecord(
+                        id = "preview-1",
+                        type = "健走",
+                        startTime = 1_756_900_000_000L,
+                        durationMinutes = 31,
+                        distanceKm = 2.80,
+                        calories = 143,
+                    ),
+                ),
+            ),
+            onOpenHistory = {},
+        )
+    }
+}

app/src/test/java/com/placeholder/ringhealth/feature/workout/WorkoutViewModelTest.kt

@@ -12,6 +12,7 @@ import kotlinx.coroutines.test.setMain
 import org.junit.After
 import org.junit.Assert.assertEquals
 import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
 import org.junit.Before
 import org.junit.Test
 
@@ -46,7 +47,8 @@ class WorkoutViewModelTest {
         val state = viewModel.uiState.value
         assertFalse(state.loading)
         assertEquals(5, state.records.size)
-        // Mock 的运动记录是倒序生成的，最近的在最前
-        assertEquals("户外跑步", state.records.first().type)
+        // 列表必须按时间倒序（最近的在最前）：直接比首尾时间戳，而不是比记录类型
+        // —— Mock 数据的首尾类型恰好相同，用类型断言无法察觉顺序被反转。
+        assertTrue(state.records.first().startTime > state.records.last().startTime)
     }
 }