fix(shift): persist name field, guard empty cycle, test corrupt-data path

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

@@ -21,6 +21,7 @@ class ShiftPatternStorage(private val prefs: SharedPreferences) {
         private const val KEY_CYCLE = "shift_cycle"
         private const val KEY_OVERRIDES = "shift_overrides"
         private const val KEY_BREAKS = "shift_breaks"
+        private const val KEY_NAME = "shift_name"
         private const val SEP = ","
 
         fun fromContext(context: Context): ShiftPatternStorage =
@@ -40,6 +41,7 @@ class ShiftPatternStorage(private val prefs: SharedPreferences) {
             .putString(KEY_CYCLE, cycleStr)
             .putString(KEY_OVERRIDES, overridesStr)
             .putString(KEY_BREAKS, breaksStr)
+            .putString(KEY_NAME, pattern.name)
             .apply()
     }
 
@@ -48,10 +50,14 @@ class ShiftPatternStorage(private val prefs: SharedPreferences) {
         val cycleStr = prefs.getString(KEY_CYCLE, null) ?: return null
         return try {
             val anchor = LocalDate.parse(anchorStr)
-            val cycle = cycleStr.split(SEP).map { if (it.trim() == "1") ShiftKind.WORK else ShiftKind.OFF }
+            val cycle = if (cycleStr.isBlank()) {
+                emptyList()
+            } else {
+                cycleStr.split(SEP).map { if (it.trim() == "1") ShiftKind.WORK else ShiftKind.OFF }
+            }
             val overrides = parseOverrides(prefs.getString(KEY_OVERRIDES, null))
             val breaks = parseBreaks(prefs.getString(KEY_BREAKS, null))
-            ShiftPattern(anchor, cycle, overrides, breaks)
+            ShiftPattern(anchor, cycle, overrides, breaks, name = prefs.getString(KEY_NAME, null) ?: "默认")
         } catch (e: Exception) {
             null
         }

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

@@ -58,6 +58,44 @@ class ShiftPatternStorageTest {
         storage.save(pattern)
         assertEquals(pattern, storage.load())
     }
+
+    @Test
+    fun load_corruptOverrides_returnsNull() {
+        storage.clear()
+        // 通过底层 prefs 注入损坏的 overrides 值
+        prefs.edit()
+            .putString("shift_anchor", "2026-05-15")
+            .putString("shift_cycle", "1,1,0,0")
+            .putString("shift_overrides", "not-a-date:1")
+            .apply()
+        assertNull(storage.load())
+    }
+
+    @Test
+    fun saveAndLoad_customName_preserved() {
+        storage.clear()
+        val pattern = ShiftPattern(
+            anchorDate = LocalDate(2026, 5, 15),
+            cycle = listOf(ShiftKind.WORK, ShiftKind.OFF),
+            name = "我的方案"
+        )
+        storage.save(pattern)
+        val loaded = storage.load()
+        assertEquals(pattern, loaded)
+        assertEquals("我的方案", loaded?.name)
+    }
+
+    @Test
+    fun saveAndLoad_emptyCycle_roundTrips() {
+        storage.clear()
+        val pattern = ShiftPattern(
+            anchorDate = LocalDate(2026, 5, 15),
+            cycle = emptyList()
+        )
+        storage.save(pattern)
+        val loaded = storage.load()
+        assertEquals(pattern, loaded)
+    }
 }
 
 // 复制自 DateCheckerStorageTest(其为 private,无法共享);重命名以避免同包下 private 类同名冲突