1

app/src/main/java/com/yaros/shiftmanager/AppDatabase.kt

@@ -1,8 +1,6 @@
 package com.yaros.shiftmanager
 
-import android.content.Context
 import androidx.room.Database
-import androidx.room.Room
 import androidx.room.RoomDatabase
 import androidx.room.TypeConverter
 import androidx.room.TypeConverters
@@ -14,7 +12,7 @@ import java.util.Date
 
 @Database(
     entities = [Income::class, Shift::class, TaxReminder::class, ShiftTemplate::class],
-    version = 2,
+    version = 3,
     exportSchema = false
 )
 @TypeConverters(Converters::class)
@@ -25,9 +23,6 @@ abstract class AppDatabase : RoomDatabase() {
     abstract fun shiftTemplateDao(): ShiftTemplateDao
 
     companion object {
-        @Volatile
-        private var INSTANCE: AppDatabase? = null
-
         val MIGRATION_1_2 = object : Migration(1, 2) {
             override fun migrate(db: SupportSQLiteDatabase) {
                 db.execSQL("ALTER TABLE shifts ADD COLUMN hoursWorked REAL NOT NULL DEFAULT 0.0")
@@ -43,17 +38,12 @@ abstract class AppDatabase : RoomDatabase() {
             }
         }
 
-        fun getInstance(context: Context): AppDatabase {
-            return INSTANCE ?: synchronized(this) {
-                val instance = Room.databaseBuilder(
-                    context.applicationContext,
-                    AppDatabase::class.java,
-                    "shift_manager_database"
-                )
-                    .addMigrations(MIGRATION_1_2)
-                    .build()
-                INSTANCE = instance
-                instance
+        val MIGRATION_2_3 = object : Migration(2, 3) {
+            override fun migrate(db: SupportSQLiteDatabase) {
+                db.execSQL("ALTER TABLE shift_templates ADD COLUMN weekendCoefficient REAL NOT NULL DEFAULT 1.0")
+                db.execSQL("ALTER TABLE shift_templates ADD COLUMN overtimeCoefficient REAL NOT NULL DEFAULT 1.5")
+                db.execSQL("ALTER TABLE shift_templates ADD COLUMN overtimeThreshold REAL NOT NULL DEFAULT 8.0")
+                db.execSQL("ALTER TABLE shift_templates ADD COLUMN bonusPerShift REAL NOT NULL DEFAULT 0.0")
             }
         }
     }

app/src/main/java/com/yaros/shiftmanager/AuthManager.kt

@@ -4,6 +4,7 @@ import androidx.compose.foundation.layout.*
 import androidx.compose.material3.*
 import androidx.compose.runtime.*
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
@@ -89,14 +90,14 @@ fun AuthScreen(viewModel: AuthViewModel, onAuthSuccess: () -> Unit) {
         TextField(
             value = email,
             onValueChange = { email = it },
-            label = { Text("Email") },
+            label = { Text(stringResource(R.string.email_label)) },
             modifier = Modifier.fillMaxWidth()
         )
         Spacer(modifier = Modifier.height(8.dp))
         TextField(
             value = password,
             onValueChange = { password = it },
-            label = { Text("Password") },
+            label = { Text(stringResource(R.string.password_label)) },
             modifier = Modifier.fillMaxWidth()
         )
         Spacer(modifier = Modifier.height(16.dp))
@@ -110,14 +111,14 @@ fun AuthScreen(viewModel: AuthViewModel, onAuthSuccess: () -> Unit) {
             },
             modifier = Modifier.fillMaxWidth()
         ) {
-            Text(if (isSignUp) "Sign Up" else "Sign In")
+            Text(if (isSignUp) stringResource(R.string.sign_up) else stringResource(R.string.sign_in))
         }
         Spacer(modifier = Modifier.height(8.dp))
         TextButton(
             onClick = { isSignUp = !isSignUp },
             modifier = Modifier.fillMaxWidth()
         ) {
-            Text(if (isSignUp) "Already have an account? Sign In" else "Don't have an account? Sign Up")
+            Text(if (isSignUp) stringResource(R.string.already_have_account) else stringResource(R.string.no_account))
         }
     }
 }

app/src/main/java/com/yaros/shiftmanager/CalendarScreen.kt

@@ -12,11 +12,13 @@ import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Add
 import androidx.compose.material.icons.filled.ArrowBack
 import androidx.compose.material.icons.filled.ArrowForward
+import androidx.compose.material.icons.filled.Delete
 import androidx.compose.material3.*
 import androidx.compose.runtime.*
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
@@ -35,14 +37,19 @@ import kotlin.math.roundToInt
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
-fun CalendarScreen(viewModel: ShiftViewModel = hiltViewModel()) {
+fun CalendarScreen(
+    viewModel: ShiftViewModel = hiltViewModel(),
+    settingsViewModel: SettingsViewModel = hiltViewModel()
+) {
     val currentMonth by viewModel.currentMonth.collectAsState()
     val monthShifts by viewModel.monthShifts.collectAsState()
     val templates by viewModel.allTemplates.collectAsState()
+    val currency by settingsViewModel.currency.collectAsState()
 
     var selectedDate by remember { mutableStateOf(LocalDate.now()) }
     var showAddDialog by remember { mutableStateOf(false) }
     var editingShift by remember { mutableStateOf<Shift?>(null) }
+    var shiftToDelete by remember { mutableStateOf<Shift?>(null) }
 
     Scaffold(
         floatingActionButton = {
@@ -50,7 +57,7 @@ fun CalendarScreen(viewModel: ShiftViewModel = hiltViewModel()) {
                 editingShift = null
                 showAddDialog = true
             }) {
-                Icon(Icons.Default.Add, contentDescription = "Add Shift")
+                Icon(Icons.Default.Add, contentDescription = stringResource(R.string.add_shift))
             }
         }
     ) { paddingValues ->
@@ -67,16 +74,28 @@ fun CalendarScreen(viewModel: ShiftViewModel = hiltViewModel()) {
                 verticalAlignment = Alignment.CenterVertically
             ) {
                 IconButton(onClick = { viewModel.previousMonth() }) {
-                    Icon(Icons.Default.ArrowBack, contentDescription = "Previous month")
+                    Icon(Icons.Default.ArrowBack, contentDescription = stringResource(R.string.previous_month))
+                }
+                Row(verticalAlignment = Alignment.CenterVertically) {
+                    Text(
+                        text = currentMonth.month.getDisplayName(TextStyle.FULL, Locale.getDefault()) +
+                            " ${currentMonth.year}",
+                        style = MaterialTheme.typography.titleLarge,
+                        fontWeight = FontWeight.Bold
+                    )
+                    Spacer(Modifier.width(8.dp))
+                    FilledTonalButton(
+                        onClick = {
+                            viewModel.goToToday()
+                            selectedDate = LocalDate.now()
+                        },
+                        contentPadding = PaddingValues(horizontal = 12.dp, vertical = 4.dp)
+                    ) {
+                        Text(stringResource(R.string.today), style = MaterialTheme.typography.labelMedium)
+                    }
                 }
-                Text(
-                    text = currentMonth.month.getDisplayName(TextStyle.FULL, Locale.getDefault()) +
-                        " ${currentMonth.year}",
-                    style = MaterialTheme.typography.titleLarge,
-                    fontWeight = FontWeight.Bold
-                )
                 IconButton(onClick = { viewModel.nextMonth() }) {
-                    Icon(Icons.Default.ArrowForward, contentDescription = "Next month")
+                    Icon(Icons.Default.ArrowForward, contentDescription = stringResource(R.string.next_month))
                 }
             }
 
@@ -116,29 +135,32 @@ fun CalendarScreen(viewModel: ShiftViewModel = hiltViewModel()) {
             HorizontalDivider(modifier = Modifier.padding(vertical = 4.dp))
 
             Text(
-                text = "Shifts on ${selectedDate.dayOfMonth} ${selectedDate.month.getDisplayName(TextStyle.SHORT, Locale.getDefault())}",
+                text = stringResource(R.string.shifts_on, selectedDate.dayOfMonth, selectedDate.month.getDisplayName(TextStyle.SHORT, Locale.getDefault())),
                 style = MaterialTheme.typography.titleMedium,
                 modifier = Modifier.padding(horizontal = 16.dp, vertical = 8.dp)
             )
 
             if (shiftsForSelected.isEmpty()) {
                 Text(
-                    text = "No shifts — tap + to add one",
+                    text = stringResource(R.string.no_shifts_hint),
                     style = MaterialTheme.typography.bodyMedium,
                     color = MaterialTheme.colorScheme.onSurfaceVariant,
                     modifier = Modifier.padding(16.dp)
                 )
             } else {
                 shiftsForSelected.forEach { shift ->
-                    ShiftCard(
-                        shift = shift,
-                        templates = templates,
-                        onClick = {
-                            editingShift = shift
-                            showAddDialog = true
-                        },
-                        onDelete = { viewModel.deleteShift(shift) }
-                    )
+                    SwipeToDeleteContainer(onDelete = { shiftToDelete = shift }) {
+                        ShiftCard(
+                            shift = shift,
+                            templates = templates,
+                            currencySymbol = currency.symbol,
+                            onClick = {
+                                editingShift = shift
+                                showAddDialog = true
+                            },
+                            onDelete = { shiftToDelete = shift }
+                        )
+                    }
                 }
             }
         }
@@ -149,6 +171,7 @@ fun CalendarScreen(viewModel: ShiftViewModel = hiltViewModel()) {
             selectedDate = selectedDate,
             templates = templates,
             existingShift = editingShift,
+            currencySymbol = currency.symbol,
             onDismiss = { showAddDialog = false },
             onSave = { shift ->
                 if (editingShift != null) viewModel.updateShift(shift)
@@ -157,6 +180,28 @@ fun CalendarScreen(viewModel: ShiftViewModel = hiltViewModel()) {
             }
         )
     }
+
+    if (shiftToDelete != null) {
+        AlertDialog(
+            onDismissRequest = { shiftToDelete = null },
+            title = { Text(stringResource(R.string.delete_confirm_title)) },
+            text = { Text(stringResource(R.string.delete_shift_message)) },
+            confirmButton = {
+                Button(
+                    onClick = {
+                        viewModel.deleteShift(shiftToDelete!!)
+                        shiftToDelete = null
+                    },
+                    colors = ButtonDefaults.buttonColors(containerColor = MaterialTheme.colorScheme.error)
+                ) { Text(stringResource(R.string.delete)) }
+            },
+            dismissButton = {
+                TextButton(onClick = { shiftToDelete = null }) {
+                    Text(stringResource(R.string.cancel))
+                }
+            }
+        )
+    }
 }
 
 // ─────────────────── Calendar Grid ───────────────────
@@ -277,14 +322,15 @@ private fun DayCell(
 private fun ShiftCard(
     shift: Shift,
     templates: List<ShiftTemplate>,
+    currencySymbol: String,
     onClick: () -> Unit,
     onDelete: () -> Unit
 ) {
     val template = templates.find { it.id == shift.templateId }
     val typeLabel = when (shift.type) {
-        ShiftType.DAY -> "Day"
-        ShiftType.NIGHT -> "Night"
-        ShiftType.WEEKEND -> "Weekend"
+        ShiftType.DAY -> stringResource(R.string.type_day)
+        ShiftType.NIGHT -> stringResource(R.string.type_night)
+        ShiftType.WEEKEND -> stringResource(R.string.type_weekend)
     }
     val typeColor = when (shift.type) {
         ShiftType.DAY -> Color(0xFFFFC107)
@@ -321,20 +367,31 @@ private fun ShiftCard(
             }
             Column(horizontalAlignment = Alignment.End) {
                 val earnings = if (template != null) {
+                    val isWeekend = shift.startTime.toInstant()
+                        .atZone(ZoneId.systemDefault())
+                        .toLocalDate()
+                        .dayOfWeek.let { it == java.time.DayOfWeek.SATURDAY || it == java.time.DayOfWeek.SUNDAY }
                     ShiftViewModel.calculateEarnings(
-                        shift.hourlyRate, shift.hoursWorked, template.coefficientRules
+                        baseRate = shift.hourlyRate,
+                        hoursWorked = shift.hoursWorked,
+                        rules = template.coefficientRules,
+                        weekendCoefficient = template.weekendCoefficient,
+                        overtimeCoefficient = template.overtimeCoefficient,
+                        overtimeThreshold = template.overtimeThreshold,
+                        bonusPerShift = template.bonusPerShift,
+                        isWeekend = isWeekend
                     )
                 } else {
                     shift.hourlyRate * shift.hoursWorked
                 }
                 Text(
-                    text = "$${String.format(Locale.getDefault(), "%.2f", earnings)}",
+                    text = "${currencySymbol}${String.format(Locale.getDefault(), "%.2f", earnings)}",
                     style = MaterialTheme.typography.titleSmall,
                     color = MaterialTheme.colorScheme.primary
                 )
                 if (shift.isCompleted) {
                     Text(
-                        text = "Completed",
+                        text = stringResource(R.string.completed),
                         style = MaterialTheme.typography.labelSmall,
                         color = Color(0xFF4CAF50)
                     )
@@ -355,6 +412,7 @@ private fun AddShiftDialog(
     selectedDate: LocalDate,
     templates: List<ShiftTemplate>,
     existingShift: Shift?,
+    currencySymbol: String,
     onDismiss: () -> Unit,
     onSave: (Shift) -> Unit
 ) {
@@ -384,47 +442,102 @@ private fun AddShiftDialog(
 
     val selectedTemplate = templates.find { it.id == selectedTemplateId }
 
-    // Auto-fill rate from template
     LaunchedEffect(selectedTemplate) {
-        selectedTemplate?.let { rateText = it.hourlyRate.toString() }
+        selectedTemplate?.let { tmpl ->
+            rateText = tmpl.hourlyRate.toString()
+            if (title.isBlank() || templates.any { it.name == title }) {
+                title = tmpl.name
+            }
+            // Infer shift type from template name
+            val nameLower = tmpl.name.lowercase()
+            shiftType = when {
+                "night" in nameLower || "ночь" in nameLower || "ночн" in nameLower -> ShiftType.NIGHT
+                "weekend" in nameLower || "выходн" in nameLower -> ShiftType.WEEKEND
+                else -> ShiftType.DAY
+            }
+            // Pre-fill hours from overtime threshold if hours are empty
+            if (hoursText.isBlank()) {
+                hoursText = tmpl.overtimeThreshold.toString()
+            }
+        }
     }
 
     AlertDialog(
         onDismissRequest = onDismiss,
-        title = { Text(if (existingShift != null) "Edit Shift" else "Add Shift") },
+        title = { Text(if (existingShift != null) stringResource(R.string.edit_shift) else stringResource(R.string.add_shift_title)) },
         text = {
             Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
 
                 // Template picker
                 if (templates.isNotEmpty()) {
-                    Text("Template", style = MaterialTheme.typography.labelMedium)
-                    Row(
-                        horizontalArrangement = Arrangement.spacedBy(6.dp),
-                        modifier = Modifier.fillMaxWidth()
-                    ) {
+                    Text(
+                        stringResource(R.string.select_shift_template),
+                        style = MaterialTheme.typography.titleSmall,
+                        color = MaterialTheme.colorScheme.primary
+                    )
+                    Column(verticalArrangement = Arrangement.spacedBy(4.dp)) {
                         templates.forEach { tmpl ->
-                            FilterChip(
-                                selected = selectedTemplateId == tmpl.id,
+                            val isSelected = selectedTemplateId == tmpl.id
+                            Card(
                                 onClick = {
                                     selectedTemplateId =
                                         if (selectedTemplateId == tmpl.id) null else tmpl.id
                                 },
-                                label = { Text(tmpl.name, style = MaterialTheme.typography.labelSmall) }
-                            )
+                                modifier = Modifier.fillMaxWidth(),
+                                colors = CardDefaults.cardColors(
+                                    containerColor = if (isSelected)
+                                        MaterialTheme.colorScheme.primaryContainer
+                                    else MaterialTheme.colorScheme.surfaceVariant
+                                )
+                            ) {
+                                Row(
+                                    modifier = Modifier
+                                        .fillMaxWidth()
+                                        .padding(12.dp),
+                                    verticalAlignment = Alignment.CenterVertically
+                                ) {
+                                    RadioButton(
+                                        selected = isSelected,
+                                        onClick = {
+                                            selectedTemplateId =
+                                                if (selectedTemplateId == tmpl.id) null else tmpl.id
+                                        }
+                                    )
+                                    Spacer(Modifier.width(8.dp))
+                                    Column(modifier = Modifier.weight(1f)) {
+                                        Text(
+                                            tmpl.name,
+                                            style = MaterialTheme.typography.titleSmall
+                                        )
+                                        Text(
+                                            "${currencySymbol}${String.format(Locale.getDefault(), "%.2f", tmpl.hourlyRate)}/${stringResource(R.string.hours_label).lowercase()}" +
+                                                if (tmpl.bonusPerShift > 0) " + ${currencySymbol}${String.format(Locale.getDefault(), "%.0f", tmpl.bonusPerShift)} ${stringResource(R.string.bonuses).lowercase()}" else "",
+                                            style = MaterialTheme.typography.bodySmall,
+                                            color = MaterialTheme.colorScheme.onSurfaceVariant
+                                        )
+                                    }
+                                }
+                            }
                         }
                     }
+                } else {
+                    Text(
+                        stringResource(R.string.no_templates_hint),
+                        style = MaterialTheme.typography.bodySmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant
+                    )
                 }
 
                 OutlinedTextField(
                     value = title,
                     onValueChange = { title = it },
-                    label = { Text("Title (optional)") },
+                    label = { Text(stringResource(R.string.title_optional)) },
                     modifier = Modifier.fillMaxWidth(),
                     singleLine = true
                 )
 
                 // Shift type
-                Text("Type", style = MaterialTheme.typography.labelMedium)
+                Text(stringResource(R.string.shift_type), style = MaterialTheme.typography.labelMedium)
                 Row(horizontalArrangement = Arrangement.spacedBy(6.dp)) {
                     ShiftType.entries.forEach { type ->
                         FilterChip(
@@ -433,9 +546,9 @@ private fun AddShiftDialog(
                             label = {
                                 Text(
                                     when (type) {
-                                        ShiftType.DAY -> "Day"
-                                        ShiftType.NIGHT -> "Night"
-                                        ShiftType.WEEKEND -> "Weekend"
+                                        ShiftType.DAY -> stringResource(R.string.type_day)
+                                        ShiftType.NIGHT -> stringResource(R.string.type_night)
+                                        ShiftType.WEEKEND -> stringResource(R.string.type_weekend)
                                     }
                                 )
                             }
@@ -447,14 +560,14 @@ private fun AddShiftDialog(
                     OutlinedTextField(
                         value = hoursText,
                         onValueChange = { hoursText = it },
-                        label = { Text("Hours") },
+                        label = { Text(stringResource(R.string.hours_label)) },
                         modifier = Modifier.weight(1f),
                         singleLine = true
                     )
                     OutlinedTextField(
                         value = rateText,
                         onValueChange = { rateText = it },
-                        label = { Text("$/hour") },
+                        label = { Text(stringResource(R.string.rate_per_hour)) },
                         modifier = Modifier.weight(1f),
                         singleLine = true
                     )
@@ -463,33 +576,45 @@ private fun AddShiftDialog(
                 // Start time button
                 OutlinedButton(onClick = { showTimePicker = true }) {
                     Text(
-                        "Start: ${
+                        stringResource(R.string.start_time,
                             String.format(
                                 Locale.getDefault(),
                                 "%02d:%02d",
                                 startTime.hour,
                                 startTime.minute
                             )
-                        }"
+                        )
                     )
                 }
 
                 Row(verticalAlignment = Alignment.CenterVertically) {
                     Checkbox(checked = isCompleted, onCheckedChange = { isCompleted = it })
-                    Text("Completed")
+                    Text(stringResource(R.string.completed_checkbox))
                 }
 
                 // Earnings preview
                 val hours = hoursText.toDoubleOrNull() ?: 0.0
                 val rate = rateText.toDoubleOrNull() ?: 0.0
+                val isWeekend = selectedDate.dayOfWeek.let {
+                    it == java.time.DayOfWeek.SATURDAY || it == java.time.DayOfWeek.SUNDAY
+                }
                 val earnings = if (selectedTemplate != null) {
-                    ShiftViewModel.calculateEarnings(rate, hours, selectedTemplate.coefficientRules)
+                    ShiftViewModel.calculateEarnings(
+                        baseRate = rate,
+                        hoursWorked = hours,
+                        rules = selectedTemplate.coefficientRules,
+                        weekendCoefficient = selectedTemplate.weekendCoefficient,
+                        overtimeCoefficient = selectedTemplate.overtimeCoefficient,
+                        overtimeThreshold = selectedTemplate.overtimeThreshold,
+                        bonusPerShift = selectedTemplate.bonusPerShift,
+                        isWeekend = isWeekend
+                    )
                 } else {
                     rate * hours
                 }
                 if (hours > 0 && rate > 0) {
                     Text(
-                        text = "Earnings: $${String.format(Locale.getDefault(), "%.2f", earnings)}",
+                        text = stringResource(R.string.earnings_preview, currencySymbol, String.format(Locale.getDefault(), "%.2f", earnings)),
                         style = MaterialTheme.typography.titleMedium,
                         color = MaterialTheme.colorScheme.primary
                     )
@@ -497,6 +622,9 @@ private fun AddShiftDialog(
             }
         },
         confirmButton = {
+            val defaultDayTitle = stringResource(R.string.default_day_shift)
+            val defaultNightTitle = stringResource(R.string.default_night_shift)
+            val defaultWeekendTitle = stringResource(R.string.default_weekend_shift)
             Button(onClick = {
                 val hours = hoursText.toDoubleOrNull() ?: 0.0
                 val rate = rateText.toDoubleOrNull() ?: 0.0
@@ -508,9 +636,9 @@ private fun AddShiftDialog(
                     id = existingShift?.id ?: UUID.randomUUID().toString(),
                     title = title.ifBlank {
                         when (shiftType) {
-                            ShiftType.DAY -> "Day Shift"
-                            ShiftType.NIGHT -> "Night Shift"
-                            ShiftType.WEEKEND -> "Weekend Shift"
+                            ShiftType.DAY -> defaultDayTitle
+                            ShiftType.NIGHT -> defaultNightTitle
+                            ShiftType.WEEKEND -> defaultWeekendTitle
                         }
                     },
                     startTime = Date.from(startDateTime.atZone(zone).toInstant()),
@@ -522,9 +650,9 @@ private fun AddShiftDialog(
                     templateId = selectedTemplateId
                 )
                 onSave(shift)
-            }) { Text("Save") }
+            }) { Text(stringResource(R.string.save)) }
         },
-        dismissButton = { TextButton(onClick = onDismiss) { Text("Cancel") } }
+        dismissButton = { TextButton(onClick = onDismiss) { Text(stringResource(R.string.cancel)) } }
     )
 
     if (showTimePicker) {
@@ -535,16 +663,16 @@ private fun AddShiftDialog(
         )
         AlertDialog(
             onDismissRequest = { showTimePicker = false },
-            title = { Text("Shift start time") },
+            title = { Text(stringResource(R.string.shift_start_time)) },
             text = { TimePicker(state = pickerState) },
             confirmButton = {
                 Button(onClick = {
                     startTime = java.time.LocalTime.of(pickerState.hour, pickerState.minute)
                     showTimePicker = false
-                }) { Text("OK") }
+                }) { Text(stringResource(R.string.ok)) }
             },
             dismissButton = {
-                TextButton(onClick = { showTimePicker = false }) { Text("Cancel") }
+                TextButton(onClick = { showTimePicker = false }) { Text(stringResource(R.string.cancel)) }
             }
         )
     }

app/src/main/java/com/yaros/shiftmanager/DatabaseModule.kt

@@ -21,7 +21,7 @@ object DatabaseModule {
             AppDatabase::class.java,
             "shift_manager_database"
         )
-            .addMigrations(AppDatabase.MIGRATION_1_2)
+            .addMigrations(AppDatabase.MIGRATION_1_2, AppDatabase.MIGRATION_2_3)
             .build()
     }
 

app/src/main/java/com/yaros/shiftmanager/MainActivity.kt

@@ -16,6 +16,7 @@ import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
 import dagger.hilt.android.AndroidEntryPoint
 
 @AndroidEntryPoint
@@ -47,7 +48,12 @@ fun MainScreen(
     incomeViewModel: IncomeViewModel,
     settingsViewModel: SettingsViewModel
 ) {
-    val navigationItems = listOf("Shifts", "Templates", "Income", "Settings")
+    val navigationItems = listOf(
+        stringResource(R.string.nav_shifts),
+        stringResource(R.string.nav_templates),
+        stringResource(R.string.nav_income),
+        stringResource(R.string.nav_settings)
+    )
     val (selectedItem, setSelectedItem) = remember { mutableStateOf(0) }
 
     Scaffold(
@@ -76,9 +82,9 @@ fun MainScreen(
     ) { paddingValues ->
         Column(modifier = Modifier.padding(paddingValues)) {
             when (selectedItem) {
-                0 -> CalendarScreen(shiftViewModel)
-                1 -> ShiftTemplatesScreen(shiftViewModel)
-                2 -> StatisticsScreen(incomeViewModel)
+                0 -> CalendarScreen(shiftViewModel, settingsViewModel)
+                1 -> ShiftTemplatesScreen(shiftViewModel, settingsViewModel)
+                2 -> StatisticsScreen(incomeViewModel, shiftViewModel, settingsViewModel)
                 3 -> SettingsScreen(settingsViewModel)
             }
         }

app/src/main/java/com/yaros/shiftmanager/SettingsMenu.kt

@@ -3,10 +3,14 @@ package com.yaros.shiftmanager
 import android.content.Context
 import androidx.compose.foundation.isSystemInDarkTheme
 import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
 import androidx.compose.material3.*
 import androidx.compose.runtime.*
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
+import androidx.annotation.StringRes
 import androidx.datastore.core.DataStore
 import androidx.datastore.preferences.core.*
 import androidx.datastore.preferences.preferencesDataStore
@@ -16,6 +20,7 @@ import dagger.hilt.android.lifecycle.HiltViewModel
 import dagger.hilt.android.qualifiers.ApplicationContext
 import kotlinx.coroutines.flow.*
 import kotlinx.coroutines.launch
+import java.util.Locale
 import javax.inject.Inject
 
 val Context.dataStore: DataStore<Preferences> by preferencesDataStore(name = "settings")
@@ -31,6 +36,14 @@ class SettingsRepository @Inject constructor(@ApplicationContext private val con
         DisplayMode.valueOf(preferences[PreferencesKeys.DISPLAY_MODE] ?: DisplayMode.WEEKLY.name)
     }
 
+    val currencyFlow: Flow<Currency> = dataStore.data.map { preferences ->
+        Currency.valueOf(preferences[PreferencesKeys.CURRENCY] ?: Currency.USD.name)
+    }
+
+    val taxRateFlow: Flow<Float> = dataStore.data.map { preferences ->
+        preferences[PreferencesKeys.TAX_RATE] ?: 0f
+    }
+
     suspend fun setThemeMode(themeMode: ThemeMode) {
         dataStore.edit { preferences ->
             preferences[PreferencesKeys.THEME_MODE] = themeMode.name
@@ -43,9 +56,23 @@ class SettingsRepository @Inject constructor(@ApplicationContext private val con
         }
     }
 
+    suspend fun setCurrency(currency: Currency) {
+        dataStore.edit { preferences ->
+            preferences[PreferencesKeys.CURRENCY] = currency.name
+        }
+    }
+
+    suspend fun setTaxRate(taxRate: Float) {
+        dataStore.edit { preferences ->
+            preferences[PreferencesKeys.TAX_RATE] = taxRate
+        }
+    }
+
     private object PreferencesKeys {
         val THEME_MODE = stringPreferencesKey("theme_mode")
         val DISPLAY_MODE = stringPreferencesKey("display_mode")
+        val CURRENCY = stringPreferencesKey("currency")
+        val TAX_RATE = floatPreferencesKey("tax_rate")
     }
 }
 
@@ -57,6 +84,17 @@ enum class DisplayMode {
     WEEKLY, MONTHLY
 }
 
+enum class Currency(val symbol: String, @StringRes val displayNameRes: Int) {
+    USD("$", R.string.currency_usd),
+    EUR("\u20AC", R.string.currency_eur),
+    GBP("\u00A3", R.string.currency_gbp),
+    RUB("\u20BD", R.string.currency_rub),
+    UAH("\u20B4", R.string.currency_uah),
+    KZT("\u20B8", R.string.currency_kzt),
+    JPY("\u00A5", R.string.currency_jpy),
+    CNY("\u00A5", R.string.currency_cny)
+}
+
 @HiltViewModel
 class SettingsViewModel @Inject constructor(private val repository: SettingsRepository) : ViewModel() {
     val themeMode: StateFlow<ThemeMode> = repository.themeFlow.stateIn(
@@ -71,6 +109,18 @@ class SettingsViewModel @Inject constructor(private val repository: SettingsRepo
         DisplayMode.WEEKLY
     )
 
+    val currency: StateFlow<Currency> = repository.currencyFlow.stateIn(
+        viewModelScope,
+        SharingStarted.WhileSubscribed(5000),
+        Currency.USD
+    )
+
+    val taxRate: StateFlow<Float> = repository.taxRateFlow.stateIn(
+        viewModelScope,
+        SharingStarted.WhileSubscribed(5000),
+        0f
+    )
+
     fun setThemeMode(themeMode: ThemeMode) = viewModelScope.launch {
         repository.setThemeMode(themeMode)
     }
@@ -78,26 +128,44 @@ class SettingsViewModel @Inject constructor(private val repository: SettingsRepo
     fun setDisplayMode(displayMode: DisplayMode) = viewModelScope.launch {
         repository.setDisplayMode(displayMode)
     }
+
+    fun setCurrency(currency: Currency) = viewModelScope.launch {
+        repository.setCurrency(currency)
+    }
+
+    fun setTaxRate(taxRate: Float) = viewModelScope.launch {
+        repository.setTaxRate(taxRate)
+    }
 }
 
 @Composable
 fun SettingsScreen(viewModel: SettingsViewModel) {
     val themeMode by viewModel.themeMode.collectAsState()
     val displayMode by viewModel.displayMode.collectAsState()
+    val currency by viewModel.currency.collectAsState()
+    val taxRate by viewModel.taxRate.collectAsState()
 
-    Column(modifier = Modifier.padding(16.dp)) {
-        Text("Settings", style = MaterialTheme.typography.titleLarge)
+    Column(
+        modifier = Modifier
+            .padding(16.dp)
+            .verticalScroll(rememberScrollState())
+    ) {
+        Text(stringResource(R.string.settings_title), style = MaterialTheme.typography.titleLarge)
         Spacer(modifier = Modifier.height(16.dp))
         ThemeModeSelector(themeMode) { viewModel.setThemeMode(it) }
         Spacer(modifier = Modifier.height(16.dp))
         DisplayModeSelector(displayMode) { viewModel.setDisplayMode(it) }
+        Spacer(modifier = Modifier.height(16.dp))
+        CurrencySelector(currency) { viewModel.setCurrency(it) }
+        Spacer(modifier = Modifier.height(16.dp))
+        TaxRateSetting(taxRate) { viewModel.setTaxRate(it) }
     }
 }
 
 @Composable
 fun ThemeModeSelector(currentMode: ThemeMode, onModeSelected: (ThemeMode) -> Unit) {
     Column {
-        Text("Theme Mode", style = MaterialTheme.typography.titleMedium)
+        Text(stringResource(R.string.theme_mode), style = MaterialTheme.typography.titleMedium)
         Spacer(modifier = Modifier.height(8.dp))
         ThemeMode.values().forEach { mode ->
             Row(
@@ -106,7 +174,13 @@ fun ThemeModeSelector(currentMode: ThemeMode, onModeSelected: (ThemeMode) -> Uni
                     .padding(vertical = 8.dp),
                 horizontalArrangement = Arrangement.SpaceBetween
             ) {
-                Text(mode.name)
+                Text(
+                    when (mode) {
+                        ThemeMode.LIGHT -> stringResource(R.string.theme_light)
+                        ThemeMode.DARK -> stringResource(R.string.theme_dark)
+                        ThemeMode.SYSTEM -> stringResource(R.string.theme_system)
+                    }
+                )
                 RadioButton(
                     selected = mode == currentMode,
                     onClick = { onModeSelected(mode) }
@@ -119,7 +193,7 @@ fun ThemeModeSelector(currentMode: ThemeMode, onModeSelected: (ThemeMode) -> Uni
 @Composable
 fun DisplayModeSelector(currentMode: DisplayMode, onModeSelected: (DisplayMode) -> Unit) {
     Column {
-        Text("Display Mode", style = MaterialTheme.typography.titleMedium)
+        Text(stringResource(R.string.display_mode), style = MaterialTheme.typography.titleMedium)
         Spacer(modifier = Modifier.height(8.dp))
         DisplayMode.values().forEach { mode ->
             Row(
@@ -128,7 +202,12 @@ fun DisplayModeSelector(currentMode: DisplayMode, onModeSelected: (DisplayMode)
                     .padding(vertical = 8.dp),
                 horizontalArrangement = Arrangement.SpaceBetween
             ) {
-                Text(mode.name)
+                Text(
+                    when (mode) {
+                        DisplayMode.WEEKLY -> stringResource(R.string.display_weekly)
+                        DisplayMode.MONTHLY -> stringResource(R.string.display_monthly)
+                    }
+                )
                 RadioButton(
                     selected = mode == currentMode,
                     onClick = { onModeSelected(mode) }
@@ -138,6 +217,81 @@ fun DisplayModeSelector(currentMode: DisplayMode, onModeSelected: (DisplayMode)
     }
 }
 
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun CurrencySelector(currentCurrency: Currency, onCurrencySelected: (Currency) -> Unit) {
+    var expanded by remember { mutableStateOf(false) }
+
+    Column {
+        Text(stringResource(R.string.currency_label), style = MaterialTheme.typography.titleMedium)
+        Spacer(modifier = Modifier.height(8.dp))
+        ExposedDropdownMenuBox(
+            expanded = expanded,
+            onExpandedChange = { expanded = !expanded }
+        ) {
+            OutlinedTextField(
+                value = "${currentCurrency.symbol} ${stringResource(currentCurrency.displayNameRes)}",
+                onValueChange = {},
+                readOnly = true,
+                trailingIcon = { ExposedDropdownMenuDefaults.TrailingIcon(expanded = expanded) },
+                modifier = Modifier
+                    .menuAnchor()
+                    .fillMaxWidth(),
+                singleLine = true
+            )
+            ExposedDropdownMenu(
+                expanded = expanded,
+                onDismissRequest = { expanded = false }
+            ) {
+                Currency.values().forEach { currency ->
+                    DropdownMenuItem(
+                        text = {
+                            Text("${currency.symbol} ${stringResource(currency.displayNameRes)}")
+                        },
+                        onClick = {
+                            onCurrencySelected(currency)
+                            expanded = false
+                        }
+                    )
+                }
+            }
+        }
+    }
+}
+
+@Composable
+fun TaxRateSetting(currentRate: Float, onRateChanged: (Float) -> Unit) {
+    var rateText by remember(currentRate) {
+        mutableStateOf(if (currentRate > 0f) String.format(Locale.getDefault(), "%.1f", currentRate) else "")
+    }
+
+    Column {
+        Text(stringResource(R.string.tax_rate_label), style = MaterialTheme.typography.titleMedium)
+        Spacer(modifier = Modifier.height(8.dp))
+        OutlinedTextField(
+            value = rateText,
+            onValueChange = { newValue ->
+                rateText = newValue
+                val parsed = newValue.toFloatOrNull()
+                if (parsed != null && parsed in 0f..100f) {
+                    onRateChanged(parsed)
+                } else if (newValue.isEmpty()) {
+                    onRateChanged(0f)
+                }
+            },
+            label = { Text(stringResource(R.string.tax_rate_hint_label)) },
+            suffix = { Text("%") },
+            modifier = Modifier.fillMaxWidth(),
+            singleLine = true
+        )
+        Text(
+            text = stringResource(R.string.tax_rate_description),
+            style = MaterialTheme.typography.bodySmall,
+            color = MaterialTheme.colorScheme.onSurfaceVariant
+        )
+    }
+}
+
 @Composable
 fun AppTheme(
     themeMode: ThemeMode,

app/src/main/java/com/yaros/shiftmanager/ShiftHelper.kt

@@ -52,7 +52,11 @@ data class ShiftTemplate(
     @PrimaryKey val id: String = UUID.randomUUID().toString(),
     val name: String,
     val hourlyRate: Double,
-    val coefficientRules: List<CoefficientRule> = emptyList()
+    val coefficientRules: List<CoefficientRule> = emptyList(),
+    val weekendCoefficient: Double = 1.0,
+    val overtimeCoefficient: Double = 1.5,
+    val overtimeThreshold: Double = 8.0,
+    val bonusPerShift: Double = 0.0
 )
 
 data class CoefficientRule(
@@ -71,6 +75,9 @@ interface ShiftDao {
     @Query("SELECT * FROM shifts WHERE startTime >= :start AND startTime < :end ORDER BY startTime ASC")
     fun getShiftsForMonth(start: Date, end: Date): Flow<List<Shift>>
 
+    @Query("SELECT * FROM shifts WHERE startTime >= :start AND startTime < :end ORDER BY startTime ASC")
+    fun getShiftsForDateRange(start: Date, end: Date): Flow<List<Shift>>
+
     @Insert(onConflict = OnConflictStrategy.REPLACE)
     suspend fun insertShift(shift: Shift)
 
@@ -107,6 +114,10 @@ class ShiftRepository @Inject constructor(private val shiftDao: ShiftDao) {
         return shiftDao.getShiftsForMonth(start, end)
     }
 
+    fun getShiftsForDateRange(startDate: Date, endDate: Date): Flow<List<Shift>> {
+        return shiftDao.getShiftsForDateRange(startDate, endDate)
+    }
+
     suspend fun insertShift(shift: Shift) = shiftDao.insertShift(shift)
     suspend fun updateShift(shift: Shift) = shiftDao.updateShift(shift)
     suspend fun deleteShift(shift: Shift) = shiftDao.deleteShift(shift)
@@ -141,6 +152,11 @@ class ShiftViewModel @Inject constructor(
     fun setMonth(month: YearMonth) { _currentMonth.value = month }
     fun nextMonth() { _currentMonth.value = _currentMonth.value.plusMonths(1) }
     fun previousMonth() { _currentMonth.value = _currentMonth.value.minusMonths(1) }
+    fun goToToday() { _currentMonth.value = YearMonth.now() }
+
+    fun getShiftsForDateRange(startDate: Date, endDate: Date): Flow<List<Shift>> {
+        return repository.getShiftsForDateRange(startDate, endDate)
+    }
 
     fun insertShift(shift: Shift) = viewModelScope.launch { repository.insertShift(shift) }
     fun updateShift(shift: Shift) = viewModelScope.launch { repository.updateShift(shift) }
@@ -159,19 +175,58 @@ class ShiftViewModel @Inject constructor(
     }
 
     companion object {
-        fun calculateEarnings(baseRate: Double, hoursWorked: Double, rules: List<CoefficientRule>): Double {
-            if (rules.isEmpty()) return baseRate * hoursWorked
-            val hoursByCoefficient = mutableListOf<Double>()
-            for (i in 0 until hoursWorked.toInt().coerceAtMost(24)) {
+        fun calculateEarnings(
+            baseRate: Double,
+            hoursWorked: Double,
+            rules: List<CoefficientRule>,
+            weekendCoefficient: Double = 1.0,
+            overtimeCoefficient: Double = 1.5,
+            overtimeThreshold: Double = 8.0,
+            bonusPerShift: Double = 0.0,
+            isWeekend: Boolean = false
+        ): Double {
+            if (hoursWorked <= 0) return 0.0
+
+            var total = 0.0
+            val regularHours = hoursWorked.coerceAtMost(overtimeThreshold)
+            val overtimeHours = (hoursWorked - overtimeThreshold).coerceAtLeast(0.0)
+
+            // Calculate regular hours with coefficient rules
+            for (i in 0 until regularHours.toInt().coerceAtMost(24)) {
                 val coeff = rules.firstOrNull { rule ->
                     if (rule.startHour <= rule.endHour)
                         i >= rule.startHour && i < rule.endHour
                     else
                         i >= rule.startHour || i < rule.endHour
                 }?.coefficient ?: 1.0
-                hoursByCoefficient.add(coeff)
+                val weekendMult = if (isWeekend) weekendCoefficient else 1.0
+                total += baseRate * coeff * weekendMult
             }
-            return hoursByCoefficient.sumOf { baseRate * it }
+
+            // Fractional regular hour
+            val fractionalRegular = regularHours - regularHours.toInt()
+            if (fractionalRegular > 0) {
+                val coeff = rules.firstOrNull { rule ->
+                    val hour = regularHours.toInt()
+                    if (rule.startHour <= rule.endHour)
+                        hour >= rule.startHour && hour < rule.endHour
+                    else
+                        hour >= rule.startHour || hour < rule.endHour
+                }?.coefficient ?: 1.0
+                val weekendMult = if (isWeekend) weekendCoefficient else 1.0
+                total += baseRate * coeff * weekendMult * fractionalRegular
+            }
+
+            // Overtime hours
+            if (overtimeHours > 0) {
+                val weekendMult = if (isWeekend) weekendCoefficient else 1.0
+                total += baseRate * overtimeCoefficient * weekendMult * overtimeHours
+            }
+
+            // Bonus
+            total += bonusPerShift
+
+            return total
         }
     }
 }

app/src/main/java/com/yaros/shiftmanager/ShiftTemplatesScreen.kt

@@ -3,6 +3,8 @@ package com.yaros.shiftmanager
 import androidx.compose.foundation.layout.*
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.filled.Add
 import androidx.compose.material3.*
@@ -10,6 +12,7 @@ import androidx.compose.runtime.*
 import androidx.compose.runtime.snapshots.SnapshotStateList
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import androidx.hilt.navigation.compose.hiltViewModel
 import java.util.Locale
@@ -18,11 +21,16 @@ import java.util.UUID
 // ─────────────────── Templates Screen ───────────────────
 
 @Composable
-fun ShiftTemplatesScreen(viewModel: ShiftViewModel = hiltViewModel()) {
+fun ShiftTemplatesScreen(
+    viewModel: ShiftViewModel = hiltViewModel(),
+    settingsViewModel: SettingsViewModel = hiltViewModel()
+) {
     val templates by viewModel.allTemplates.collectAsState()
+    val currency by settingsViewModel.currency.collectAsState()
 
     var showDialog by remember { mutableStateOf(false) }
     var editingTemplate by remember { mutableStateOf<ShiftTemplate?>(null) }
+    var templateToDelete by remember { mutableStateOf<ShiftTemplate?>(null) }
 
     Scaffold(
         floatingActionButton = {
@@ -30,18 +38,18 @@ fun ShiftTemplatesScreen(viewModel: ShiftViewModel = hiltViewModel()) {
                 editingTemplate = null
                 showDialog = true
             }) {
-                Icon(Icons.Default.Add, contentDescription = "Add Template")
+                Icon(Icons.Default.Add, contentDescription = stringResource(R.string.add_template))
             }
         }
     ) { paddingValues ->
         Column(modifier = Modifier.padding(paddingValues).fillMaxSize()) {
             Text(
-                text = "Shift Templates",
+                text = stringResource(R.string.shift_templates_title),
                 style = MaterialTheme.typography.headlineSmall,
                 modifier = Modifier.padding(16.dp)
             )
             Text(
-                text = "Create templates with hourly rates and night/weekend coefficients",
+                text = stringResource(R.string.templates_subtitle),
                 style = MaterialTheme.typography.bodyMedium,
                 color = MaterialTheme.colorScheme.onSurfaceVariant,
                 modifier = Modifier.padding(horizontal = 16.dp, vertical = 4.dp)
@@ -51,13 +59,13 @@ fun ShiftTemplatesScreen(viewModel: ShiftViewModel = hiltViewModel()) {
                 Box(modifier = Modifier.fillMaxSize(), contentAlignment = Alignment.Center) {
                     Column(horizontalAlignment = Alignment.CenterHorizontally) {
                         Text(
-                            "No templates yet",
+                            stringResource(R.string.no_templates_yet),
                             style = MaterialTheme.typography.titleMedium,
                             color = MaterialTheme.colorScheme.onSurfaceVariant
                         )
                         Spacer(Modifier.height(8.dp))
                         Text(
-                            "Tap + to create your first shift template",
+                            stringResource(R.string.create_first_template),
                             style = MaterialTheme.typography.bodyMedium,
                             color = MaterialTheme.colorScheme.onSurfaceVariant
                         )
@@ -66,14 +74,17 @@ fun ShiftTemplatesScreen(viewModel: ShiftViewModel = hiltViewModel()) {
             } else {
                 LazyColumn(modifier = Modifier.fillMaxWidth()) {
                     items(templates) { template ->
-                        TemplateCard(
-                            template = template,
-                            onEdit = {
-                                editingTemplate = template
-                                showDialog = true
-                            },
-                            onDelete = { viewModel.deleteTemplate(template) }
-                        )
+                        SwipeToDeleteContainer(onDelete = { templateToDelete = template }) {
+                            TemplateCard(
+                                template = template,
+                                currencySymbol = currency.symbol,
+                                onEdit = {
+                                    editingTemplate = template
+                                    showDialog = true
+                                },
+                                onDelete = { templateToDelete = template }
+                            )
+                        }
                     }
                 }
             }
@@ -91,6 +102,28 @@ fun ShiftTemplatesScreen(viewModel: ShiftViewModel = hiltViewModel()) {
             }
         )
     }
+
+    if (templateToDelete != null) {
+        AlertDialog(
+            onDismissRequest = { templateToDelete = null },
+            title = { Text(stringResource(R.string.delete_confirm_title)) },
+            text = { Text(stringResource(R.string.delete_template_message)) },
+            confirmButton = {
+                Button(
+                    onClick = {
+                        viewModel.deleteTemplate(templateToDelete!!)
+                        templateToDelete = null
+                    },
+                    colors = ButtonDefaults.buttonColors(containerColor = MaterialTheme.colorScheme.error)
+                ) { Text(stringResource(R.string.delete)) }
+            },
+            dismissButton = {
+                TextButton(onClick = { templateToDelete = null }) {
+                    Text(stringResource(R.string.cancel))
+                }
+            }
+        )
+    }
 }
 
 // ─────────────────── Template Card ───────────────────
@@ -98,6 +131,7 @@ fun ShiftTemplatesScreen(viewModel: ShiftViewModel = hiltViewModel()) {
 @Composable
 private fun TemplateCard(
     template: ShiftTemplate,
+    currencySymbol: String,
     onEdit: () -> Unit,
     onDelete: () -> Unit
 ) {
@@ -120,13 +154,34 @@ private fun TemplateCard(
             }
 
             Text(
-                text = "Base rate: $${String.format(Locale.getDefault(), "%.2f", template.hourlyRate)}/hr",
+                text = stringResource(R.string.base_rate, currencySymbol, String.format(Locale.getDefault(), "%.2f", template.hourlyRate)),
                 style = MaterialTheme.typography.bodyMedium
             )
+            if (template.weekendCoefficient != 1.0) {
+                Text(
+                    text = stringResource(R.string.weekend_coeff_short, String.format(Locale.getDefault(), "%.1f", template.weekendCoefficient)),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.secondary
+                )
+            }
+            if (template.overtimeThreshold > 0 && template.overtimeCoefficient != 1.0) {
+                Text(
+                    text = stringResource(R.string.overtime_label, String.format(Locale.getDefault(), "%.0f", template.overtimeThreshold), String.format(Locale.getDefault(), "%.1f", template.overtimeCoefficient)),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.tertiary
+                )
+            }
+            if (template.bonusPerShift > 0) {
+                Text(
+                    text = stringResource(R.string.bonus_per_shift, currencySymbol, String.format(Locale.getDefault(), "%.2f", template.bonusPerShift)),
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.primary
+                )
+            }
 
             if (template.coefficientRules.isNotEmpty()) {
                 Spacer(Modifier.height(8.dp))
-                Text("Coefficient rules:", style = MaterialTheme.typography.labelMedium)
+                Text(stringResource(R.string.coefficient_rules), style = MaterialTheme.typography.labelMedium)
                 template.coefficientRules.forEach { rule ->
                     val percent = ((rule.coefficient - 1.0) * 100).toInt()
                     val sign = if (percent > 0) "+" else ""
@@ -162,6 +217,30 @@ private fun TemplateDialog(
             it.addAll(existingTemplate?.coefficientRules ?: emptyList())
         }
     }
+    var weekendCoeffText by remember {
+        mutableStateOf(
+            if (existingTemplate != null && existingTemplate.weekendCoefficient != 1.0)
+                existingTemplate.weekendCoefficient.toString() else ""
+        )
+    }
+    var overtimeCoeffText by remember {
+        mutableStateOf(
+            if (existingTemplate != null && existingTemplate.overtimeCoefficient != 1.5)
+                existingTemplate.overtimeCoefficient.toString() else ""
+        )
+    }
+    var overtimeThresholdText by remember {
+        mutableStateOf(
+            if (existingTemplate != null && existingTemplate.overtimeThreshold != 8.0)
+                existingTemplate.overtimeThreshold.toString() else ""
+        )
+    }
+    var bonusText by remember {
+        mutableStateOf(
+            if (existingTemplate != null && existingTemplate.bonusPerShift > 0)
+                existingTemplate.bonusPerShift.toString() else ""
+        )
+    }
 
     // New rule fields
     var newStartHour by remember { mutableStateOf("") }
@@ -170,28 +249,74 @@ private fun TemplateDialog(
 
     AlertDialog(
         onDismissRequest = onDismiss,
-        title = { Text(if (existingTemplate != null) "Edit Template" else "New Template") },
+        title = { Text(if (existingTemplate != null) stringResource(R.string.edit_template) else stringResource(R.string.new_template)) },
         text = {
-            Column(verticalArrangement = Arrangement.spacedBy(8.dp)) {
+            Column(
+                verticalArrangement = Arrangement.spacedBy(8.dp),
+                modifier = Modifier.verticalScroll(rememberScrollState())
+            ) {
                 OutlinedTextField(
                     value = name,
                     onValueChange = { name = it },
-                    label = { Text("Template name (e.g. Day Shift, Night Shift)") },
+                    label = { Text(stringResource(R.string.template_name_hint)) },
                     modifier = Modifier.fillMaxWidth(),
                     singleLine = true
                 )
                 OutlinedTextField(
                     value = rateText,
                     onValueChange = { rateText = it },
-                    label = { Text("Base hourly rate ($)") },
+                    label = { Text(stringResource(R.string.base_hourly_rate)) },
                     modifier = Modifier.fillMaxWidth(),
                     singleLine = true
                 )
 
-                Divider()
-                Text("Coefficient rules", style = MaterialTheme.typography.labelLarge)
+                HorizontalDivider()
+                Text(stringResource(R.string.additional_rules), style = MaterialTheme.typography.labelLarge)
+
+                OutlinedTextField(
+                    value = weekendCoeffText,
+                    onValueChange = { weekendCoeffText = it },
+                    label = { Text(stringResource(R.string.weekend_coefficient)) },
+                    placeholder = { Text(stringResource(R.string.weekend_placeholder)) },
+                    modifier = Modifier.fillMaxWidth(),
+                    singleLine = true
+                )
+
+                Row(
+                    horizontalArrangement = Arrangement.spacedBy(8.dp),
+                    modifier = Modifier.fillMaxWidth()
+                ) {
+                    OutlinedTextField(
+                        value = overtimeThresholdText,
+                        onValueChange = { overtimeThresholdText = it },
+                        label = { Text(stringResource(R.string.overtime_after)) },
+                        placeholder = { Text("8") },
+                        modifier = Modifier.weight(1f),
+                        singleLine = true
+                    )
+                    OutlinedTextField(
+                        value = overtimeCoeffText,
+                        onValueChange = { overtimeCoeffText = it },
+                        label = { Text(stringResource(R.string.overtime_multiplier)) },
+                        placeholder = { Text("1.5") },
+                        modifier = Modifier.weight(1f),
+                        singleLine = true
+                    )
+                }
+
+                OutlinedTextField(
+                    value = bonusText,
+                    onValueChange = { bonusText = it },
+                    label = { Text(stringResource(R.string.bonus_per_shift_label)) },
+                    placeholder = { Text("0") },
+                    modifier = Modifier.fillMaxWidth(),
+                    singleLine = true
+                )
+
+                HorizontalDivider()
+                Text(stringResource(R.string.time_based_rules), style = MaterialTheme.typography.labelLarge)
                 Text(
-                    "Example: 00:00–06:00 → 1.4 means +40% for hours between midnight and 6 AM",
+                    stringResource(R.string.time_rule_example),
                     style = MaterialTheme.typography.bodySmall,
                     color = MaterialTheme.colorScheme.onSurfaceVariant
                 )
@@ -217,7 +342,7 @@ private fun TemplateDialog(
                 }
 
                 // Add new rule row
-                Text("Add rule:", style = MaterialTheme.typography.labelSmall)
+                Text(stringResource(R.string.add_rule), style = MaterialTheme.typography.labelSmall)
                 Row(
                     horizontalArrangement = Arrangement.spacedBy(4.dp),
                     verticalAlignment = Alignment.CenterVertically
@@ -225,7 +350,7 @@ private fun TemplateDialog(
                     OutlinedTextField(
                         value = newStartHour,
                         onValueChange = { newStartHour = it.filter { c -> c.isDigit() }.take(2) },
-                        label = { Text("From") },
+                        label = { Text(stringResource(R.string.from_label)) },
                         placeholder = { Text("00") },
                         modifier = Modifier.weight(1f),
                         singleLine = true
@@ -234,7 +359,7 @@ private fun TemplateDialog(
                     OutlinedTextField(
                         value = newEndHour,
                         onValueChange = { newEndHour = it.filter { c -> c.isDigit() }.take(2) },
-                        label = { Text("To") },
+                        label = { Text(stringResource(R.string.to_label)) },
                         placeholder = { Text("06") },
                         modifier = Modifier.weight(1f),
                         singleLine = true
@@ -267,19 +392,28 @@ private fun TemplateDialog(
             }
         },
         confirmButton = {
+            val untitledName = stringResource(R.string.untitled_template)
             Button(onClick = {
                 val rate = rateText.toDoubleOrNull() ?: return@Button
+                val weekendCoeff = weekendCoeffText.toDoubleOrNull() ?: 1.0
+                val overtimeCoeff = overtimeCoeffText.toDoubleOrNull() ?: 1.5
+                val overtimeThreshold = overtimeThresholdText.toDoubleOrNull() ?: 8.0
+                val bonus = bonusText.toDoubleOrNull() ?: 0.0
                 val template = ShiftTemplate(
                     id = existingTemplate?.id ?: UUID.randomUUID().toString(),
-                    name = name.ifBlank { "Untitled Template" },
+                    name = name.ifBlank { untitledName },
                     hourlyRate = rate,
-                    coefficientRules = rules.toList()
+                    coefficientRules = rules.toList(),
+                    weekendCoefficient = weekendCoeff,
+                    overtimeCoefficient = overtimeCoeff,
+                    overtimeThreshold = overtimeThreshold,
+                    bonusPerShift = bonus
                 )
                 onSave(template)
-            }) { Text("Save") }
+            }) { Text(stringResource(R.string.save)) }
         },
         dismissButton = {
-            TextButton(onClick = onDismiss) { Text("Cancel") }
+            TextButton(onClick = onDismiss) { Text(stringResource(R.string.cancel)) }
         }
     )
 }

app/src/main/java/com/yaros/shiftmanager/Staticanager.kt

@@ -1,82 +1,327 @@
 package com.yaros.shiftmanager
 
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.Row
-import androidx.compose.foundation.layout.Spacer
-import androidx.compose.foundation.layout.height
-import androidx.compose.foundation.layout.padding
-import androidx.compose.material3.Button
-import androidx.compose.material3.ButtonDefaults
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Text
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.LaunchedEffect
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.remember
-import androidx.compose.runtime.setValue
+import androidx.compose.foundation.background
+import androidx.compose.foundation.layout.*
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
+import androidx.compose.material3.*
+import androidx.compose.runtime.*
+import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
-import java.util.Calendar
-import java.util.Date
-import java.util.Locale
+import kotlinx.coroutines.awaitCancellation
+import kotlinx.coroutines.launch
+import java.text.SimpleDateFormat
+import java.time.DayOfWeek
+import java.time.LocalDate
+import java.time.ZoneId
+import java.time.temporal.TemporalAdjusters
+import java.util.*
+import kotlin.math.roundToInt
 
 
 @Composable
-fun StatisticsScreen(incomeViewModel: IncomeViewModel) {
+fun StatisticsScreen(
+    incomeViewModel: IncomeViewModel,
+    shiftViewModel: ShiftViewModel,
+    settingsViewModel: SettingsViewModel
+) {
     var selectedPeriod by remember { mutableStateOf(StatisticsPeriod.MONTH) }
     var incomes by remember { mutableStateOf<List<Income>>(emptyList()) }
+    var shifts by remember { mutableStateOf<List<Shift>>(emptyList()) }
+    val templates by shiftViewModel.allTemplates.collectAsState()
+    val currency by settingsViewModel.currency.collectAsState()
+    val taxRate by settingsViewModel.taxRate.collectAsState()
 
     LaunchedEffect(selectedPeriod) {
         val (startDate, endDate) = getDateRangeForPeriod(selectedPeriod)
-        incomeViewModel.getIncomesForPeriod(startDate, endDate).observeForever { incomes = it }
+
+        // Observe incomes
+        val incomeObserver = androidx.lifecycle.Observer<List<Income>> { incomes = it }
+        val incomeLiveData = incomeViewModel.getIncomesForPeriod(startDate, endDate)
+        incomeLiveData.observeForever(incomeObserver)
+
+        // Collect shifts
+        val shiftsJob = launch {
+            shiftViewModel.getShiftsForDateRange(startDate, endDate).collect { shifts = it }
+        }
+
+        // Cleanup on recomposition
+        try {
+            awaitCancellation()
+        } finally {
+            incomeLiveData.removeObserver(incomeObserver)
+            shiftsJob.cancel()
+        }
     }
 
-    Column(modifier = Modifier.padding(16.dp)) {
+    // Calculate estimated earnings from shifts
+    val estimatedEarnings = remember(shifts, templates) {
+        shifts.sumOf { shift ->
+            val template = templates.find { it.id == shift.templateId }
+            val isWeekend = shift.startTime.toInstant()
+                .atZone(ZoneId.systemDefault())
+                .toLocalDate()
+                .dayOfWeek.let { it == DayOfWeek.SATURDAY || it == DayOfWeek.SUNDAY }
+            if (template != null) {
+                ShiftViewModel.calculateEarnings(
+                    baseRate = shift.hourlyRate,
+                    hoursWorked = shift.hoursWorked,
+                    rules = template.coefficientRules,
+                    weekendCoefficient = template.weekendCoefficient,
+                    overtimeCoefficient = template.overtimeCoefficient,
+                    overtimeThreshold = template.overtimeThreshold,
+                    bonusPerShift = template.bonusPerShift,
+                    isWeekend = isWeekend
+                )
+            } else {
+                shift.hourlyRate * shift.hoursWorked
+            }
+        }
+    }
+
+    val realEarnings = incomes.sumOf { it.amount }
+    val taxAmount = realEarnings * (taxRate / 100.0)
+    val afterTaxEarnings = realEarnings - taxAmount
+
+    Column(
+        modifier = Modifier
+            .padding(16.dp)
+            .verticalScroll(rememberScrollState())
+    ) {
+        Text(
+            stringResource(R.string.select_period),
+            style = MaterialTheme.typography.titleMedium,
+            fontWeight = FontWeight.Bold
+        )
+        Spacer(modifier = Modifier.height(8.dp))
         PeriodSelector(selectedPeriod) { selectedPeriod = it }
         Spacer(modifier = Modifier.height(16.dp))
-        IncomeChart(incomes)
+
+        // Earnings Overview Cards
+        Text(
+            stringResource(R.string.earnings_overview),
+            style = MaterialTheme.typography.titleLarge,
+            fontWeight = FontWeight.Bold
+        )
+        Spacer(modifier = Modifier.height(12.dp))
+
+        // Estimated Earnings Card
+        EarningsCard(
+            title = stringResource(R.string.estimated_earnings),
+            amount = estimatedEarnings,
+            currencySymbol = currency.symbol,
+            description = stringResource(R.string.estimated_description),
+            color = Color(0xFF2196F3)
+        )
+
+        Spacer(modifier = Modifier.height(8.dp))
+
+        // Real Earnings Card
+        EarningsCard(
+            title = stringResource(R.string.real_earnings),
+            amount = realEarnings,
+            currencySymbol = currency.symbol,
+            description = stringResource(R.string.real_description),
+            color = Color(0xFF4CAF50)
+        )
+
+        Spacer(modifier = Modifier.height(8.dp))
+
+        // After Tax Card
+        EarningsCard(
+            title = stringResource(R.string.after_tax),
+            amount = afterTaxEarnings,
+            currencySymbol = currency.symbol,
+            description = stringResource(R.string.after_tax_description, String.format(Locale.getDefault(), "%.1f", taxRate)),
+            color = Color(0xFFFF9800)
+        )
+
+        if (taxAmount > 0) {
+            Spacer(modifier = Modifier.height(4.dp))
+            Text(
+                text = stringResource(R.string.tax_amount, currency.symbol, String.format(Locale.getDefault(), "%.2f", taxAmount)),
+                style = MaterialTheme.typography.bodyMedium,
+                color = MaterialTheme.colorScheme.onSurfaceVariant,
+                modifier = Modifier.padding(horizontal = 12.dp)
+            )
+        }
+
         Spacer(modifier = Modifier.height(16.dp))
-        IncomeBreakdown(incomes)
+        HorizontalDivider()
+        Spacer(modifier = Modifier.height(16.dp))
+
+        // Earnings Chart
+        val chartData = remember(shifts, templates) {
+            buildChartData(shifts, templates, selectedPeriod)
+        }
+        if (chartData.isNotEmpty()) {
+            Text(
+                stringResource(R.string.earnings_chart),
+                style = MaterialTheme.typography.titleMedium,
+                fontWeight = FontWeight.Bold
+            )
+            Spacer(modifier = Modifier.height(8.dp))
+            EarningsBarChart(
+                data = chartData,
+                modifier = Modifier.padding(horizontal = 4.dp)
+            )
+            Spacer(modifier = Modifier.height(16.dp))
+            HorizontalDivider()
+            Spacer(modifier = Modifier.height(16.dp))
+        }
+
+        // Income Breakdown
+        Text(
+            stringResource(R.string.income_breakdown),
+            style = MaterialTheme.typography.titleMedium,
+            fontWeight = FontWeight.Bold
+        )
+        Spacer(modifier = Modifier.height(8.dp))
+        IncomeBreakdown(incomes, currency.symbol)
+
+        Spacer(modifier = Modifier.height(16.dp))
+
+        // Shifts summary
+        Text(
+            stringResource(R.string.shifts_summary),
+            style = MaterialTheme.typography.titleMedium,
+            fontWeight = FontWeight.Bold
+        )
+        Spacer(modifier = Modifier.height(8.dp))
+        ShiftsSummary(shifts, currency.symbol)
     }
 }
 
 @Composable
-fun PeriodSelector(selectedPeriod: StatisticsPeriod, onPeriodSelected: (StatisticsPeriod) -> Unit) {
-    Row {
-        StatisticsPeriod.entries.forEach { period ->
-            Button(
-                onClick = { onPeriodSelected(period) },
-                modifier = Modifier.padding(4.dp),
-                colors = ButtonDefaults.buttonColors(
-                    containerColor = if (period == selectedPeriod) MaterialTheme.colorScheme.primary else MaterialTheme.colorScheme.secondary
-
+private fun EarningsCard(
+    title: String,
+    amount: Double,
+    currencySymbol: String,
+    description: String,
+    color: Color
+) {
+    Card(
+        modifier = Modifier.fillMaxWidth(),
+        colors = CardDefaults.cardColors(containerColor = color.copy(alpha = 0.1f))
+    ) {
+        Row(
+            modifier = Modifier
+                .fillMaxWidth()
+                .padding(16.dp),
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            // Color strip
+            Box(
+                modifier = Modifier
+                    .width(4.dp)
+                    .height(48.dp)
+                    .background(color, MaterialTheme.shapes.small)
+            )
+            Spacer(Modifier.width(12.dp))
+            Column(modifier = Modifier.weight(1f)) {
+                Text(
+                    text = title,
+                    style = MaterialTheme.typography.titleSmall,
+                    color = color
+                )
+                Text(
+                    text = description,
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant
                 )
-            ) {
-                Text(period.name)
             }
+            Text(
+                text = "${currencySymbol}${String.format(Locale.getDefault(), "%.2f", amount)}",
+                style = MaterialTheme.typography.titleLarge,
+                fontWeight = FontWeight.Bold,
+                color = color
+            )
+        }
+    }
+}
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun PeriodSelector(selectedPeriod: StatisticsPeriod, onPeriodSelected: (StatisticsPeriod) -> Unit) {
+    Row(horizontalArrangement = Arrangement.spacedBy(8.dp)) {
+        StatisticsPeriod.entries.forEach { period ->
+            FilterChip(
+                selected = period == selectedPeriod,
+                onClick = { onPeriodSelected(period) },
+                label = {
+                    Text(
+                        when (period) {
+                            StatisticsPeriod.WEEK -> stringResource(R.string.period_week)
+                            StatisticsPeriod.MONTH -> stringResource(R.string.period_month)
+                            StatisticsPeriod.YEAR -> stringResource(R.string.period_year)
+                        }
+                    )
+                }
+            )
         }
     }
 }
 
 @Composable
-fun IncomeChart(incomes: List<Income>) {
-    // Placeholder for chart - Vico chart implementation
-    Text("Income Chart: ${incomes.size} entries")
-}
-
-@Composable
-fun IncomeBreakdown(incomes: List<Income>) {
+fun IncomeBreakdown(incomes: List<Income>, currencySymbol: String) {
     val totalIncome = incomes.sumOf { it.amount }
     val regularIncome = incomes.filter { it.type == IncomeType.REGULAR }.sumOf { it.amount }
     val tipsIncome = incomes.filter { it.type == IncomeType.TIPS }.sumOf { it.amount }
     val bonusIncome = incomes.filter { it.type == IncomeType.BONUS }.sumOf { it.amount }
 
     Column {
-        Text("Total Income: $${String.format(Locale.US, "%.2f", totalIncome)}", style = MaterialTheme.typography.titleLarge)
-        Text("Regular Income: $${String.format(Locale.US, "%.2f", regularIncome)}", style = MaterialTheme.typography.bodyLarge)
-        Text("Tips: $${String.format(Locale.US, "%.2f", tipsIncome)}", style = MaterialTheme.typography.bodyLarge)
-        Text("Bonuses: $${String.format(Locale.US, "%.2f", bonusIncome)}", style = MaterialTheme.typography.bodyLarge)
+        BreakdownRow(stringResource(R.string.total), totalIncome, currencySymbol, MaterialTheme.typography.titleMedium)
+        BreakdownRow(stringResource(R.string.regular), regularIncome, currencySymbol, MaterialTheme.typography.bodyMedium)
+        BreakdownRow(stringResource(R.string.tips), tipsIncome, currencySymbol, MaterialTheme.typography.bodyMedium)
+        BreakdownRow(stringResource(R.string.bonuses), bonusIncome, currencySymbol, MaterialTheme.typography.bodyMedium)
+    }
+}
+
+@Composable
+private fun BreakdownRow(
+    label: String,
+    amount: Double,
+    currencySymbol: String,
+    style: androidx.compose.ui.text.TextStyle
+) {
+    Row(
+        modifier = Modifier.fillMaxWidth().padding(vertical = 2.dp),
+        horizontalArrangement = Arrangement.SpaceBetween
+    ) {
+        Text(label, style = style)
+        Text(
+            "${currencySymbol}${String.format(Locale.getDefault(), "%.2f", amount)}",
+            style = style
+        )
+    }
+}
+
+@Composable
+private fun ShiftsSummary(shifts: List<Shift>, currencySymbol: String) {
+    val completedShifts = shifts.count { it.isCompleted }
+    val totalHours = shifts.sumOf { it.hoursWorked }
+    val avgHours = if (shifts.isNotEmpty()) totalHours / shifts.size else 0.0
+
+    Column {
+        SummaryRow(stringResource(R.string.total_shifts), shifts.size.toString())
+        SummaryRow(stringResource(R.string.completed_label), completedShifts.toString())
+        SummaryRow(stringResource(R.string.total_hours), String.format(Locale.getDefault(), stringResource(R.string.hours_format), totalHours))
+        SummaryRow(stringResource(R.string.avg_hours), String.format(Locale.getDefault(), stringResource(R.string.hours_format), avgHours))
+    }
+}
+
+@Composable
+private fun SummaryRow(label: String, value: String) {
+    Row(
+        modifier = Modifier.fillMaxWidth().padding(vertical = 2.dp),
+        horizontalArrangement = Arrangement.SpaceBetween
+    ) {
+        Text(label, style = MaterialTheme.typography.bodyMedium)
+        Text(value, style = MaterialTheme.typography.bodyMedium, fontWeight = FontWeight.Medium)
     }
 }
 
@@ -84,6 +329,87 @@ enum class StatisticsPeriod {
     WEEK, MONTH, YEAR
 }
 
+private fun buildChartData(
+    shifts: List<Shift>,
+    templates: List<ShiftTemplate>,
+    period: StatisticsPeriod
+): List<ChartDataPoint> {
+    if (shifts.isEmpty()) return emptyList()
+
+    val dateFormat = SimpleDateFormat("yyyy-MM-dd", Locale.getDefault())
+    val labelFormat = when (period) {
+        StatisticsPeriod.WEEK -> SimpleDateFormat("EEE", Locale.getDefault())
+        StatisticsPeriod.MONTH -> SimpleDateFormat("dd", Locale.getDefault())
+        StatisticsPeriod.YEAR -> SimpleDateFormat("MMM", Locale.getDefault())
+    }
+
+    // Group shifts by day
+    val shiftsByDay = shifts.groupBy { shift ->
+        dateFormat.format(shift.startTime)
+    }
+
+    // For YEAR period, group by month; otherwise by day
+    val grouped = when (period) {
+        StatisticsPeriod.YEAR -> {
+            val monthFormat = SimpleDateFormat("yyyy-MM", Locale.getDefault())
+            shifts.groupBy { monthFormat.format(it.startTime) }
+                .map { (key, dayShifts) ->
+                    val earnings = dayShifts.sumOf { shift ->
+                        calculateShiftEarnings(shift, templates)
+                    }
+                    val label = labelFormat.format(dayShifts.first().startTime)
+                    ChartDataPoint(label, earnings)
+                }
+                .sortedBy { it.label }
+        }
+        else -> {
+            shiftsByDay.map { (key, dayShifts) ->
+                val earnings = dayShifts.sumOf { shift ->
+                    calculateShiftEarnings(shift, templates)
+                }
+                val label = labelFormat.format(dayShifts.first().startTime)
+                ChartDataPoint(label, earnings)
+            }.sortedBy { it.label }
+        }
+    }
+
+    // Limit to max 15 bars for readability
+    return if (grouped.size > 15) {
+        // Aggregate into buckets
+        val bucketSize = (grouped.size + 14) / 15
+        grouped.chunked(bucketSize).map { chunk ->
+            ChartDataPoint(
+                label = chunk.first().label,
+                value = chunk.sumOf { it.value }
+            )
+        }
+    } else {
+        grouped
+    }
+}
+
+private fun calculateShiftEarnings(shift: Shift, templates: List<ShiftTemplate>): Double {
+    val template = templates.find { it.id == shift.templateId }
+    val isWeekend = shift.startTime.toInstant()
+        .atZone(ZoneId.systemDefault())
+        .toLocalDate()
+        .dayOfWeek.let { it == DayOfWeek.SATURDAY || it == DayOfWeek.SUNDAY }
+    return if (template != null) {
+        ShiftViewModel.calculateEarnings(
+            baseRate = shift.hourlyRate,
+            hoursWorked = shift.hoursWorked,
+            rules = template.coefficientRules,
+            weekendCoefficient = template.weekendCoefficient,
+            overtimeCoefficient = template.overtimeCoefficient,
+            overtimeThreshold = template.overtimeThreshold,
+            bonusPerShift = template.bonusPerShift,
+            isWeekend = isWeekend
+        )
+    } else {
+        shift.hourlyRate * shift.hoursWorked
+    }
+}
+
 fun getDateRangeForPeriod(period: StatisticsPeriod): Pair<Date, Date> {
     val calendar = Calendar.getInstance()
     val endDate = calendar.time
@@ -94,4 +420,4 @@ fun getDateRangeForPeriod(period: StatisticsPeriod): Pair<Date, Date> {
     }, -1)
     val startDate = calendar.time
     return Pair(startDate, endDate)
-}
+}

app/src/main/java/com/yaros/shiftmanager/TaxReminder.kt

@@ -13,6 +13,7 @@ import androidx.compose.foundation.lazy.items
 import androidx.compose.material3.*
 import androidx.compose.runtime.*
 import androidx.compose.ui.*
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.*
 import androidx.room.*
@@ -91,7 +92,7 @@ fun TaxReminderScreen(viewModel: TaxReminderViewModel) {
     val taxReminders by viewModel.allTaxReminders.collectAsState(initial = emptyList())
 
     Column(modifier = Modifier.padding(16.dp)) {
-        Text("Tax Reminders", style = MaterialTheme.typography.titleLarge)
+        Text(stringResource(R.string.tax_reminders), style = MaterialTheme.typography.titleLarge)
         Spacer(modifier = Modifier.height(16.dp))
         LazyColumn {
             items(taxReminders) { reminder ->
@@ -120,7 +121,7 @@ fun TaxReminderItem(reminder: TaxReminder, viewModel: TaxReminderViewModel) {
             Column {
                 Text(reminder.description, style = MaterialTheme.typography.bodyLarge)
                 Text(
-                    "Due: ${SimpleDateFormat("MMM dd, yyyy", Locale.getDefault()).format(reminder.dueDate)}",
+                    stringResource(R.string.due_date, SimpleDateFormat("MMM dd, yyyy", Locale.getDefault()).format(reminder.dueDate)),
                     style = MaterialTheme.typography.bodyMedium
                 )
             }
@@ -139,7 +140,7 @@ fun AddTaxReminderButton(viewModel: TaxReminderViewModel) {
     var showDialog by remember { mutableStateOf(false) }
 
     Button(onClick = { showDialog = true }) {
-        Text("Add Tax Reminder")
+        Text(stringResource(R.string.add_tax_reminder))
     }
 
     if (showDialog) {
@@ -160,13 +161,13 @@ fun AddTaxReminderDialog(onDismiss: () -> Unit, onAdd: (String, Date) -> Unit) {
 
     AlertDialog(
         onDismissRequest = onDismiss,
-        title = { Text("Add Tax Reminder") },
+        title = { Text(stringResource(R.string.add_tax_reminder)) },
         text = {
             Column {
                 TextField(
                     value = description,
                     onValueChange = { description = it },
-                    label = { Text("Description") }
+                    label = { Text(stringResource(R.string.description_label)) }
                 )
                 Spacer(modifier = Modifier.height(8.dp))
                 // Add a DatePicker here for selecting dueDate
@@ -174,12 +175,12 @@ fun AddTaxReminderDialog(onDismiss: () -> Unit, onAdd: (String, Date) -> Unit) {
         },
         confirmButton = {
             Button(onClick = { onAdd(description, dueDate) }) {
-                Text("Add")
+                Text(stringResource(R.string.add))
             }
         },
         dismissButton = {
             Button(onClick = onDismiss) {
-                Text("Cancel")
+                Text(stringResource(R.string.cancel))
             }
         }
     )

app/src/main/res/values/strings.xml

@@ -1,3 +1,166 @@
 <resources>
     <string name="app_name">ShiftManager</string>
+
+    <!-- Navigation -->
+    <string name="nav_shifts">Shifts</string>
+    <string name="nav_templates">Templates</string>
+    <string name="nav_income">Income</string>
+    <string name="nav_settings">Settings</string>
+
+    <!-- Calendar Screen -->
+    <string name="add_shift">Add Shift</string>
+    <string name="previous_month">Previous month</string>
+    <string name="next_month">Next month</string>
+    <string name="shifts_on">Shifts on %1$d %2$s</string>
+    <string name="no_shifts_hint">No shifts — tap + to add one</string>
+
+    <!-- Shift Card -->
+    <string name="type_day">Day</string>
+    <string name="type_night">Night</string>
+    <string name="type_weekend">Weekend</string>
+    <string name="completed">Completed</string>
+
+    <!-- Add/Edit Shift Dialog -->
+    <string name="edit_shift">Edit Shift</string>
+    <string name="add_shift_title">Add Shift</string>
+    <string name="select_shift_template">Select Shift Template</string>
+    <string name="no_templates_hint">No templates — create one in the Templates tab</string>
+    <string name="title_optional">Title (optional)</string>
+    <string name="shift_type">Type</string>
+    <string name="hours_label">Hours</string>
+    <string name="rate_per_hour">Rate/hour</string>
+    <string name="start_time">Start: %1$s</string>
+    <string name="completed_checkbox">Completed</string>
+    <string name="earnings_preview">Earnings: %1$s%2$s</string>
+    <string name="save">Save</string>
+    <string name="cancel">Cancel</string>
+    <string name="shift_start_time">Shift start time</string>
+    <string name="ok">OK</string>
+    <string name="bonus_label">+%1$s%2$s bonus</string>
+    <string name="rate_per_hour_format">%1$s%2$s/hr</string>
+
+    <!-- Default shift titles -->
+    <string name="default_day_shift">Day Shift</string>
+    <string name="default_night_shift">Night Shift</string>
+    <string name="default_weekend_shift">Weekend Shift</string>
+
+    <!-- Shift Templates Screen -->
+    <string name="shift_templates_title">Shift Templates</string>
+    <string name="templates_subtitle">Create templates with hourly rates and night/weekend coefficients</string>
+    <string name="no_templates_yet">No templates yet</string>
+    <string name="create_first_template">Tap + to create your first shift template</string>
+    <string name="add_template">Add Template</string>
+    <string name="base_rate">Base rate: %1$s%2$s/hr</string>
+    <string name="weekend_coeff_short">Weekend: \u00D7%1$s</string>
+    <string name="overtime_label">Overtime (&gt;%1$sh): \u00D7%2$s</string>
+    <string name="bonus_per_shift">Bonus/shift: %1$s%2$s</string>
+    <string name="coefficient_rules">Coefficient rules:</string>
+
+    <!-- Template Dialog -->
+    <string name="edit_template">Edit Template</string>
+    <string name="new_template">New Template</string>
+    <string name="template_name_hint">Template name (e.g. Day Shift, Night Shift)</string>
+    <string name="base_hourly_rate">Base hourly rate ($)</string>
+    <string name="additional_rules">Additional Rules</string>
+    <string name="weekend_coefficient">Weekend coefficient</string>
+    <string name="weekend_placeholder">e.g. 1.5 = +50%</string>
+    <string name="overtime_after">Overtime after (hrs)</string>
+    <string name="overtime_multiplier">Overtime \u00D7</string>
+    <string name="bonus_per_shift_label">Bonus per shift ($)</string>
+    <string name="time_based_rules">Time-based coefficient rules</string>
+    <string name="time_rule_example">Example: 00:00\u201306:00 \u2192 1.4 means +40% for hours between midnight and 6 AM</string>
+    <string name="add_rule">Add rule:</string>
+    <string name="from_label">From</string>
+    <string name="to_label">To</string>
+    <string name="untitled_template">Untitled Template</string>
+
+    <!-- Settings Screen -->
+    <string name="settings_title">Settings</string>
+    <string name="theme_mode">Theme Mode</string>
+    <string name="display_mode">Display Mode</string>
+    <string name="currency_label">Currency</string>
+    <string name="tax_rate_label">Tax Rate</string>
+    <string name="tax_rate_hint_label">Tax rate (%)</string>
+    <string name="tax_rate_description">This rate will be used to calculate your after-tax earnings</string>
+
+    <!-- Theme Modes -->
+    <string name="theme_light">LIGHT</string>
+    <string name="theme_dark">DARK</string>
+    <string name="theme_system">SYSTEM</string>
+
+    <!-- Display Modes -->
+    <string name="display_weekly">WEEKLY</string>
+    <string name="display_monthly">MONTHLY</string>
+
+    <!-- Statistics Screen -->
+    <string name="select_period">Select Period</string>
+    <string name="earnings_overview">Earnings Overview</string>
+    <string name="estimated_earnings">Estimated Earnings</string>
+    <string name="estimated_description">Based on scheduled shifts &amp; templates</string>
+    <string name="real_earnings">Real Earnings</string>
+    <string name="real_description">Actual recorded income</string>
+    <string name="after_tax">After Tax</string>
+    <string name="after_tax_description">After %1$s%% tax deduction</string>
+    <string name="tax_amount">Tax amount: %1$s%2$s</string>
+    <string name="income_breakdown">Income Breakdown</string>
+    <string name="shifts_summary">Shifts Summary</string>
+
+    <!-- Periods -->
+    <string name="period_week">Week</string>
+    <string name="period_month">Month</string>
+    <string name="period_year">Year</string>
+
+    <!-- Income Breakdown -->
+    <string name="total">Total</string>
+    <string name="regular">Regular</string>
+    <string name="tips">Tips</string>
+    <string name="bonuses">Bonuses</string>
+
+    <!-- Shifts Summary -->
+    <string name="total_shifts">Total shifts</string>
+    <string name="completed_label">Completed</string>
+    <string name="total_hours">Total hours</string>
+    <string name="avg_hours">Avg hours/shift</string>
+    <string name="hours_format">%.1f hrs</string>
+
+    <!-- Auth Screen -->
+    <string name="email_label">Email</string>
+    <string name="password_label">Password</string>
+    <string name="sign_up">Sign Up</string>
+    <string name="sign_in">Sign In</string>
+    <string name="already_have_account">Already have an account? Sign In</string>
+    <string name="no_account">Don\'t have an account? Sign Up</string>
+
+    <!-- Tax Reminders -->
+    <string name="tax_reminders">Tax Reminders</string>
+    <string name="add_tax_reminder">Add Tax Reminder</string>
+    <string name="due_date">Due: %1$s</string>
+    <string name="description_label">Description</string>
+    <string name="add">Add</string>
+
+    <!-- Currency display names -->
+    <string name="currency_usd">US Dollar</string>
+    <string name="currency_eur">Euro</string>
+    <string name="currency_gbp">British Pound</string>
+    <string name="currency_rub">Russian Ruble</string>
+    <string name="currency_uah">Ukrainian Hryvnia</string>
+    <string name="currency_kzt">Kazakhstani Tenge</string>
+    <string name="currency_jpy">Japanese Yen</string>
+    <string name="currency_cny">Chinese Yuan</string>
+
+    <!-- Today button -->
+    <string name="today">Today</string>
+
+    <!-- Delete confirmation -->
+    <string name="delete_confirm_title">Delete?</string>
+    <string name="delete_shift_message">Delete this shift?</string>
+    <string name="delete_template_message">Delete this template?</string>
+    <string name="delete">Delete</string>
+
+    <!-- Swipe to delete -->
+    <string name="swipe_to_delete">Swipe to delete</string>
+
+    <!-- Earnings chart -->
+    <string name="earnings_chart">Earnings Chart</string>
+    <string name="chart_no_data">No data for chart</string>
 </resources>