refactor: 删除 P0 冗余代码（自定义combine/死StateFlow/网格重复算法/runBlocking）

- 删除自定义 6 参数 combine + Quintuple，改用标准库嵌套 combine + Triple
- 删除 yearViewProgress 死 StateFlow 及关联测试
- generateMonthDays/generateMiniMonthDays 复用 getMonthGridInfo
- WeekPager 移除 runBlocking，交由 DayCell 自行异步计算
- 修复 AnimLog 在 JVM 单元测试中因 android.util.Log 不可用而崩溃

core/src/main/kotlin/plus/rua/project/CalendarViewModel.kt

@@ -56,37 +56,6 @@ data class CalendarUiState(
     val showLegalHoliday: Boolean
 )
 
-/**
- * 将六个 [Flow] 合并为一个 [Flow]，使用 [transform] 处理最新值。
- *
- * kotlinx-coroutines 1.11 仅内置到 5 参数的 [combine] 重载，
- * 此扩展用于扁平化 6 个 StateFlow 的合并，避免多层嵌套产生的中间流。
- */
-private inline fun <T1, T2, T3, T4, T5, T6, R> combine(
-    flow: Flow<T1>,
-    flow2: Flow<T2>,
-    flow3: Flow<T3>,
-    flow4: Flow<T4>,
-    flow5: Flow<T5>,
-    flow6: Flow<T6>,
-    crossinline transform: suspend (T1, T2, T3, T4, T5, T6) -> R
-): Flow<R> = combine(
-    combine(flow, flow2, flow3, flow4, flow5) { t1, t2, t3, t4, t5 ->
-        Quintuple(t1, t2, t3, t4, t5)
-    },
-    flow6
-) { quintuple, t6 ->
-    transform(quintuple.first, quintuple.second, quintuple.third, quintuple.fourth, quintuple.fifth, t6)
-}
-
-private data class Quintuple<T1, T2, T3, T4, T5>(
-    val first: T1,
-    val second: T2,
-    val third: T3,
-    val fourth: T4,
-    val fifth: T5
-)
-
 /**
  * 日历状态管理，持有选中日期、折叠状态和 ISO 周号计算逻辑。
  *
@@ -141,9 +110,6 @@ class CalendarViewModel(
     private val _isYearView = MutableStateFlow(false)
     val isYearView: StateFlow<Boolean> = _isYearView.asStateFlow()
 
-    private val _yearViewProgress = MutableStateFlow(0f)
-    val yearViewProgress: StateFlow<Float> = _yearViewProgress.asStateFlow()
-
     private val _yearViewYear = MutableStateFlow(today.year)
     val yearViewYear: StateFlow<Int> = _yearViewYear.asStateFlow()
 
@@ -170,13 +136,9 @@ class CalendarViewModel(
 
     /** 聚合 UI 状态，减少 Compose 层分散订阅导致的重组。 */
     val uiState: StateFlow<CalendarUiState> = combine(
-        _selectedDate,
+        combine(_selectedDate, _isCollapsed, _isYearView) { s, c, y -> Triple(s, c, y) },
-        _isCollapsed,
+        combine(_yearViewYear, _collapseProgress, _showLegalHoliday) { y, p, h -> Triple(y, p, h) }
-        _isYearView,
+    ) { (selectedDate, isCollapsed, isYearView), (yearViewYear, collapseProgress, showLegalHoliday) ->
-        _yearViewYear,
-        _collapseProgress,
-        _showLegalHoliday
-    ) { selectedDate, isCollapsed, isYearView, yearViewYear, collapseProgress, showLegalHoliday ->
         CalendarUiState(
             selectedDate = selectedDate,
             isCollapsed = isCollapsed,
@@ -212,8 +174,6 @@ class CalendarViewModel(
         if (_isYearView.value) {
             logd(TAG_VM, "[toggleYearView] ===== START Year→Month t=$t0 =====")
             composeTraceBeginSection("YearView→MonthView")
-            _yearViewProgress.value = 0f
-            logd(TAG_VM, "[toggleYearView] yearViewProgress=0 dt=${(System.nanoTime() - t0) / 1_000_000}ms")
             _isYearView.value = false
             logd(TAG_VM, "[toggleYearView] isYearView=false dt=${(System.nanoTime() - t0) / 1_000_000}ms")
             composeTraceEndSection()
@@ -223,8 +183,6 @@ class CalendarViewModel(
             composeTraceBeginSection("MonthView→YearView")
             _yearViewYear.value = _selectedDate.value.year
             logd(TAG_VM, "[toggleYearView] yearViewYear=${_yearViewYear.value} dt=${(System.nanoTime() - t0) / 1_000_000}ms")
-            _yearViewProgress.value = 1f
-            logd(TAG_VM, "[toggleYearView] yearViewProgress=1 dt=${(System.nanoTime() - t0) / 1_000_000}ms")
             _isYearView.value = true
             logd(TAG_VM, "[toggleYearView] isYearView=true dt=${(System.nanoTime() - t0) / 1_000_000}ms")
             composeTraceEndSection()
@@ -253,8 +211,6 @@ class CalendarViewModel(
         logd(TAG_VM, "[selectMonthFromYearView] selectedDate set dt=${(System.nanoTime() - t0) / 1_000_000}ms")
         _isYearView.value = false
         logd(TAG_VM, "[selectMonthFromYearView] isYearView=false dt=${(System.nanoTime() - t0) / 1_000_000}ms")
-        _yearViewProgress.value = 0f
-        logd(TAG_VM, "[selectMonthFromYearView] yearViewProgress=0 dt=${(System.nanoTime() - t0) / 1_000_000}ms")
         composeTraceEndSection()
         logd(TAG_VM, "[selectMonthFromYearView] ===== END total=${(System.nanoTime() - t0) / 1_000_000}ms =====")
     }

core/src/main/kotlin/plus/rua/project/ui/CalendarMonthPage.kt

@@ -292,16 +292,9 @@ data class HolidayEdgeInfo(
 )
 
 private fun generateMonthDays(year: Int, month: Int): List<DayData> {
-    val firstOfMonth = LocalDate(year, Month(month), 1)
+    val info = getMonthGridInfo(year, month)
-    val offset = firstOfMonth.dayOfWeek.ordinal
+    return (0 until info.totalDays).map { i ->
-    val startDate = firstOfMonth.minus(DatePeriod(days = offset))
+        val date = info.startDate.plus(DatePeriod(days = i))
-    val nextMonth = if (month == 12) LocalDate(year + 1, 1, 1) else LocalDate(year, Month(month + 1), 1)
-    val daysInMonth = nextMonth.minus(DatePeriod(days = 1)).day
-    val rows = ((offset + daysInMonth - 1) / 7) + 1
-    val totalDays = rows * 7
-
-    return (0 until totalDays).map { i ->
-        val date = startDate.plus(DatePeriod(days = i))
         DayData(
             date = date,
             isCurrentMonth = date.month.number == month && date.year == year

core/src/main/kotlin/plus/rua/project/ui/WeekPager.kt

@@ -18,13 +18,10 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.alpha
 import androidx.compose.ui.unit.dp
 import kotlinx.coroutines.flow.drop
-import kotlinx.coroutines.runBlocking
 import kotlinx.datetime.DatePeriod
 import kotlinx.datetime.LocalDate
 import kotlinx.datetime.daysUntil
 import kotlinx.datetime.plus
-import plus.rua.project.DayCellInfo
-import plus.rua.project.LunarCache
 import plus.rua.project.ShiftKind
 import plus.rua.project.composeTraceBeginSection
 import plus.rua.project.composeTraceEndSection
@@ -99,11 +96,6 @@ fun WeekPager(
         ) {
             (0 until 7).forEach { dayOffset ->
                 val date = weekMonday.plus(DatePeriod(days = dayOffset))
-                val lunarData = remember(date) {
-                    runBlocking {
-                        LunarCache.default.getOrCompute(date)
-                    }
-                }
                 DayCell(
                     date = date,
                     isCurrentMonth = date.month == selectedDate.month
@@ -115,8 +107,7 @@ fun WeekPager(
                     cellIndex = dayOffset,
                     onClick = { onDateClick(date) },
                     modifier = Modifier.weight(1f),
-                    interactionSource = interactionSource,
+                    interactionSource = interactionSource
-                    lunarData = lunarData
                 )
             }
         }

core/src/main/kotlin/plus/rua/project/ui/YearGridView.kt

@@ -307,16 +307,9 @@ private data class MiniDayData(
 
 private fun generateMiniMonthDays(year: Int, month: Int): List<MiniDayData> {
     composeTraceBeginSection("generateMiniMonthDays:$year-$month")
-    val firstOfMonth = LocalDate(year, Month(month), 1)
+    val info = getMonthGridInfo(year, month)
-    val offset = firstOfMonth.dayOfWeek.ordinal
+    val result = (0 until info.totalDays).map { i ->
-    val startDate = firstOfMonth.minus(DatePeriod(days = offset))
+        val date = info.startDate.plus(DatePeriod(days = i))
-    val nextMonth = if (month == 12) LocalDate(year + 1, 1, 1) else LocalDate(year, Month(month + 1), 1)
-    val daysInMonth = nextMonth.minus(DatePeriod(days = 1)).day
-    val rows = ((offset + daysInMonth - 1) / 7) + 1
-    val totalDays = rows * 7
-
-    val result = (0 until totalDays).map { i ->
-        val date = startDate.plus(DatePeriod(days = i))
         MiniDayData(
             date = date,
             isCurrentMonth = date.month.number == month && date.year == year

core/src/main/kotlin/plus/rua/project/util/AnimLog.kt

@@ -6,13 +6,22 @@ import plus.rua.project.shared.BuildConfig
 @Suppress("NOTHING_TO_INLINE")
 inline fun logd(tag: String, message: () -> String) {
     if (BuildConfig.DEBUG) {
-        Log.d(tag, message())
+        try {
+            Log.d(tag, message())
+        } catch (_: RuntimeException) {
+            // Android Log not available in JVM unit tests; fallback to stdout
+            println("D/$tag: ${message()}")
+        }
     }
 }
 
 @Suppress("NOTHING_TO_INLINE")
 inline fun logd(tag: String, message: String) {
     if (BuildConfig.DEBUG) {
-        Log.d(tag, message)
+        try {
+            Log.d(tag, message)
+        } catch (_: RuntimeException) {
+            println("D/$tag: $message")
+        }
     }
 }

core/src/test/kotlin/plus/rua/project/CalendarViewModelStateTest.kt

@@ -52,11 +52,6 @@ class CalendarViewModelStateTest {
         assertFalse(createViewModel().isYearView.value)
     }
 
-    @Test
-    fun init_yearViewProgressDefaultsZero() {
-        assertEquals(0f, createViewModel().yearViewProgress.value, 0.001f)
-    }
-
     @Test
     fun init_yearViewYearDefaultsToTodayYear() {
         assertEquals(2026, createViewModel().yearViewYear.value)
@@ -375,7 +370,6 @@ class CalendarViewModelStateTest {
         assertFalse(vm.isYearView.value)
         vm.toggleYearView()
         assertTrue(vm.isYearView.value)
-        assertEquals(1f, vm.yearViewProgress.value, 0.001f)
     }
 
     @Test
@@ -385,7 +379,6 @@ class CalendarViewModelStateTest {
         assertTrue(vm.isYearView.value)
         vm.toggleYearView()
         assertFalse(vm.isYearView.value)
-        assertEquals(0f, vm.yearViewProgress.value, 0.001f)
     }
 
     @Test