Refactor: Extract boilerplate: safeLaunchLoad, clearToast, ToastEffect (CODE-21/22/23) (#312)

- Extracted `safeLaunchLoad` inline extension function to `ViewModelExt.kt` to encapsulate API call success/failure handling logic and replaced usages across 18 viewmodels.
- Extracted `ToastHost` interface to standardize `clearToast()` behavior across all ViewModels displaying toasts.
- Extracted `ToastEffect` composable to `SharedComponents.kt` and applied it to 16 screens, reducing repetitive side effect code blocks.

Fixes #286

app/src/main/java/com/m57/hermescontrol/ui/achievements/AchievementsViewModel.kt

@@ -1,18 +1,14 @@
 package com.m57.hermescontrol.ui.achievements
 
 import androidx.lifecycle.ViewModel
-import androidx.lifecycle.viewModelScope
 import com.m57.hermescontrol.data.model.Achievement
 import com.m57.hermescontrol.data.remote.ApiClient
-import com.m57.hermescontrol.data.remote.NetworkResult
 import com.m57.hermescontrol.data.remote.safeApiCall
-import kotlinx.coroutines.Dispatchers
+import com.m57.hermescontrol.ui.common.safeLaunchLoad
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.update
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
 
 data class AchievementsUiState(
     val isLoading: Boolean = false,
@@ -25,31 +21,25 @@ class AchievementsViewModel : ViewModel() {
     val uiState: StateFlow<AchievementsUiState> = _uiState.asStateFlow()
 
     fun loadAchievements() {
-        _uiState.update { it.copy(isLoading = true, errorMessage = null) }
-        viewModelScope.launch {
-            val result =
-                withContext(Dispatchers.IO) {
-                    safeApiCall { ApiClient.hermesApi.getAchievements() }
+        safeLaunchLoad(
+            apiCall = { safeApiCall { ApiClient.hermesApi.getAchievements() } },
+            onStart = { _uiState.update { it.copy(isLoading = true, errorMessage = null) } },
+            onSuccess = { data ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        achievements = data.achievements.orEmpty(),
+                    )
                 }
-            when (result) {
-                is NetworkResult.Success -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            achievements = result.data.achievements.orEmpty(),
-                        )
-                    }
+            },
+            onError = { errorMsg ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        errorMessage = "Failed to load achievements: $errorMsg",
+                    )
                 }
-
-                is NetworkResult.Failure -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            errorMessage = "Failed to load achievements: ${result.error.message}",
-                        )
-                    }
-                }
-            }
-        }
+            },
+        )
     }
 }

app/src/main/java/com/m57/hermescontrol/ui/channels/ChannelsScreen.kt

@@ -1,6 +1,5 @@
 package com.m57.hermescontrol.ui.channels
 
-import android.widget.Toast
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -27,7 +26,6 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
@@ -39,6 +37,7 @@ import com.m57.hermescontrol.ui.common.ErrorState
 import com.m57.hermescontrol.ui.common.HermesScaffold
 import com.m57.hermescontrol.ui.common.LoadingState
 import com.m57.hermescontrol.ui.common.SearchBar
+import com.m57.hermescontrol.ui.common.ToastEffect
 import com.m57.hermescontrol.ui.common.listContentPadding
 import com.m57.hermescontrol.ui.common.listItemSpacing
 
@@ -49,7 +48,6 @@ fun ChannelsScreen(
     viewModel: ChannelsViewModel = viewModel { ChannelsViewModel() },
 ) {
     val state by viewModel.uiState.collectAsStateWithLifecycle()
-    val context = LocalContext.current
 
     var query by remember { mutableStateOf("") }
 
@@ -64,12 +62,7 @@ fun ChannelsScreen(
         viewModel.loadPlatforms()
     }
 
-    LaunchedEffect(state.toastMessage) {
-        state.toastMessage?.let { msg ->
-            Toast.makeText(context, msg, Toast.LENGTH_SHORT).show()
-            viewModel.clearToast()
-        }
-    }
+    ToastEffect(toastMessage = state.toastMessage, onClearToast = viewModel::clearToast)
 
     HermesScaffold(
         title = { Text(stringResource(R.string.screen_channels)) },

app/src/main/java/com/m57/hermescontrol/ui/channels/ChannelsViewModel.kt

@@ -1,19 +1,16 @@
 package com.m57.hermescontrol.ui.channels
 
 import androidx.lifecycle.ViewModel
-import androidx.lifecycle.viewModelScope
 import com.m57.hermescontrol.data.model.MessagingPlatform
 import com.m57.hermescontrol.data.model.MessagingPlatformUpdate
 import com.m57.hermescontrol.data.remote.ApiClient
-import com.m57.hermescontrol.data.remote.NetworkResult
 import com.m57.hermescontrol.data.remote.safeApiCall
-import kotlinx.coroutines.Dispatchers
+import com.m57.hermescontrol.ui.common.ToastHost
+import com.m57.hermescontrol.ui.common.safeLaunchLoad
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.update
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
 
 data class ChannelsUiState(
     val isLoading: Boolean = false,
@@ -22,67 +19,55 @@ data class ChannelsUiState(
     val toastMessage: String? = null,
 )
 
-class ChannelsViewModel : ViewModel() {
+class ChannelsViewModel : ViewModel(), ToastHost {
     private val _uiState = MutableStateFlow(ChannelsUiState())
     val uiState: StateFlow<ChannelsUiState> = _uiState.asStateFlow()
 
     fun loadPlatforms() {
-        _uiState.update { it.copy(isLoading = true, errorMessage = null) }
-        viewModelScope.launch {
-            val result =
-                withContext(Dispatchers.IO) {
-                    safeApiCall { ApiClient.hermesApi.getMessagingPlatforms() }
+        safeLaunchLoad(
+            apiCall = { safeApiCall { ApiClient.hermesApi.getMessagingPlatforms() } },
+            onStart = { _uiState.update { it.copy(isLoading = true, errorMessage = null) } },
+            onSuccess = { data ->
+                _uiState.update { it.copy(isLoading = false, platforms = data?.platforms.orEmpty()) }
+            },
+            onError = { errorMsg ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        errorMessage = "Failed to load platforms: $errorMsg",
+                    )
                 }
-            when (result) {
-                is NetworkResult.Success -> {
-                    _uiState.update { it.copy(isLoading = false, platforms = result.data?.platforms.orEmpty()) }
-                }
-
-                is NetworkResult.Failure -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            errorMessage = "Failed to load platforms: ${result.error.message}",
-                        )
-                    }
-                }
-            }
-        }
+            },
+        )
     }
 
     fun configurePlatform(
         platformId: String,
         update: MessagingPlatformUpdate,
     ) {
-        _uiState.update { it.copy(isLoading = true, errorMessage = null) }
-        viewModelScope.launch {
-            val result =
-                withContext(Dispatchers.IO) {
-                    safeApiCall { ApiClient.hermesApi.configurePlatform(platformId, update) }
+        safeLaunchLoad(
+            apiCall = { safeApiCall { ApiClient.hermesApi.configurePlatform(platformId, update) } },
+            onStart = { _uiState.update { it.copy(isLoading = true, errorMessage = null) } },
+            onSuccess = { data ->
+                val message = "$platformId configured successfully — restart the gateway for changes to take effect"
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        toastMessage = message,
+                    )
                 }
-            when (result) {
-                is NetworkResult.Success -> {
-                    val message = "$platformId configured successfully — restart the gateway for changes to take effect"
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            toastMessage = message,
-                        )
-                    }
-                    loadPlatforms()
+                loadPlatforms()
+            },
+            onError = { errorMsg ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        errorMessage = "Failed to configure platform: $errorMsg",
+                        toastMessage = "Failed to configure platform: $errorMsg",
+                    )
                 }
-
-                is NetworkResult.Failure -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            errorMessage = "Failed to configure platform: ${result.error.message}",
-                            toastMessage = "Failed to configure platform: ${result.error.message}",
-                        )
-                    }
-                }
-            }
-        }
+            },
+        )
     }
 
     fun configurePlatform(
@@ -92,7 +77,7 @@ class ChannelsViewModel : ViewModel() {
         configurePlatform(platformId, MessagingPlatformUpdate(env = config))
     }
 
-    fun clearToast() {
+    override fun clearToast() {
         _uiState.update { it.copy(toastMessage = null) }
     }
 }

app/src/main/java/com/m57/hermescontrol/ui/common/SharedComponents.kt

@@ -343,3 +343,19 @@ fun InfoRow(
         )
     }
 }
+
+// ── ToastEffect — helper for one-shot toast messages ───────────────────
+
+@Composable
+fun ToastEffect(
+    toastMessage: String?,
+    onClearToast: () -> Unit,
+) {
+    val context = androidx.compose.ui.platform.LocalContext.current
+    androidx.compose.runtime.LaunchedEffect(toastMessage) {
+        toastMessage?.let { msg ->
+            android.widget.Toast.makeText(context, msg, android.widget.Toast.LENGTH_SHORT).show()
+            onClearToast()
+        }
+    }
+}

app/src/main/java/com/m57/hermescontrol/ui/common/ViewModelExt.kt

@@ -0,0 +1,28 @@
+package com.m57.hermescontrol.ui.common
+
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.viewModelScope
+import com.m57.hermescontrol.data.remote.NetworkResult
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.withContext
+
+interface ToastHost {
+    fun clearToast()
+}
+
+inline fun <T> ViewModel.safeLaunchLoad(
+    crossinline apiCall: suspend () -> NetworkResult<T>,
+    crossinline onStart: () -> Unit,
+    crossinline onSuccess: (T) -> Unit,
+    crossinline onError: (String) -> Unit,
+) {
+    onStart()
+    viewModelScope.launch {
+        val result = withContext(Dispatchers.IO) { apiCall() }
+        when (result) {
+            is NetworkResult.Success -> onSuccess(result.data)
+            is NetworkResult.Failure -> onError(result.error.message ?: "Unknown error")
+        }
+    }
+}

app/src/main/java/com/m57/hermescontrol/ui/config/ConfigScreen.kt

@@ -1,6 +1,5 @@
 package com.m57.hermescontrol.ui.config
 
-import android.widget.Toast
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -25,7 +24,6 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.unit.dp
@@ -35,6 +33,7 @@ import com.m57.hermescontrol.R
 import com.m57.hermescontrol.ui.common.ErrorState
 import com.m57.hermescontrol.ui.common.HermesScaffold
 import com.m57.hermescontrol.ui.common.LoadingState
+import com.m57.hermescontrol.ui.common.ToastEffect
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -44,19 +43,13 @@ fun ConfigScreen(
     viewModel: ConfigViewModel = viewModel { ConfigViewModel() },
 ) {
     val state by viewModel.uiState.collectAsStateWithLifecycle()
-    val context = LocalContext.current
     var editingText by remember(state.yamlText) { mutableStateOf(state.yamlText ?: "") }
 
     LaunchedEffect(Unit) {
         viewModel.loadRawConfig()
     }
 
-    LaunchedEffect(state.toastMessage) {
-        state.toastMessage?.let { msg ->
-            Toast.makeText(context, msg, Toast.LENGTH_SHORT).show()
-            viewModel.clearToast()
-        }
-    }
+    ToastEffect(toastMessage = state.toastMessage, onClearToast = viewModel::clearToast)
 
     HermesScaffold(
         title = { Text(stringResource(R.string.config_screen_title)) },

app/src/main/java/com/m57/hermescontrol/ui/config/ConfigViewModel.kt

@@ -6,6 +6,8 @@ import com.m57.hermescontrol.data.model.UpdateRawConfigRequest
 import com.m57.hermescontrol.data.remote.ApiClient
 import com.m57.hermescontrol.data.remote.NetworkResult
 import com.m57.hermescontrol.data.remote.safeApiCall
+import com.m57.hermescontrol.ui.common.ToastHost
+import com.m57.hermescontrol.ui.common.safeLaunchLoad
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -23,38 +25,32 @@ data class ConfigUiState(
     val toastMessage: String? = null,
 )
 
-class ConfigViewModel : ViewModel() {
+class ConfigViewModel : ViewModel(), ToastHost {
     private val _uiState = MutableStateFlow(ConfigUiState())
     val uiState: StateFlow<ConfigUiState> = _uiState.asStateFlow()
 
     fun loadRawConfig() {
-        _uiState.update { it.copy(isLoading = true, errorMessage = null) }
-        viewModelScope.launch {
-            val result =
-                withContext(Dispatchers.IO) {
-                    safeApiCall { ApiClient.hermesApi.getRawConfig() }
+        safeLaunchLoad(
+            apiCall = { safeApiCall { ApiClient.hermesApi.getRawConfig() } },
+            onStart = { _uiState.update { it.copy(isLoading = true, errorMessage = null) } },
+            onSuccess = { data ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        path = data.path,
+                        yamlText = data.yaml,
+                    )
                 }
-            when (result) {
-                is NetworkResult.Success -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            path = result.data.path,
-                            yamlText = result.data.yaml,
-                        )
-                    }
+            },
+            onError = { errorMsg ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        errorMessage = "Failed to load config: $errorMsg",
+                    )
                 }
-
-                is NetworkResult.Failure -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            errorMessage = "Failed to load config: ${result.error.message}",
-                        )
-                    }
-                }
-            }
-        }
+            },
+        )
     }
 
     fun saveRawConfig(yamlText: String) {
@@ -87,7 +83,7 @@ class ConfigViewModel : ViewModel() {
         }
     }
 
-    fun clearToast() {
+    override fun clearToast() {
         _uiState.update { it.copy(toastMessage = null) }
     }
 }

app/src/main/java/com/m57/hermescontrol/ui/cron/CronJobsScreen.kt

@@ -1,6 +1,5 @@
 package com.m57.hermescontrol.ui.cron
 
-import android.widget.Toast
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -26,7 +25,6 @@ import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
@@ -39,6 +37,7 @@ import com.m57.hermescontrol.ui.common.HermesScaffold
 import com.m57.hermescontrol.ui.common.LoadingState
 import com.m57.hermescontrol.ui.common.StatusBadge
 import com.m57.hermescontrol.ui.common.StatusBadgeType
+import com.m57.hermescontrol.ui.common.ToastEffect
 import com.m57.hermescontrol.ui.common.listContentPadding
 import com.m57.hermescontrol.ui.common.listItemSpacing
 import com.m57.hermescontrol.util.CronExpressionFormatter
@@ -50,19 +49,13 @@ fun CronJobsScreen(
     viewModel: CronJobsViewModel = viewModel { CronJobsViewModel() },
 ) {
     val state by viewModel.uiState.collectAsStateWithLifecycle()
-    val context = LocalContext.current
     val spacing = LocalSpacing.current
 
     LaunchedEffect(Unit) {
         viewModel.loadCronJobs()
     }
 
-    LaunchedEffect(state.toastMessage) {
-        state.toastMessage?.let { msg ->
-            Toast.makeText(context, msg, Toast.LENGTH_SHORT).show()
-            viewModel.clearToast()
-        }
-    }
+    ToastEffect(toastMessage = state.toastMessage, onClearToast = viewModel::clearToast)
 
     HermesScaffold(
         title = { Text(stringResource(R.string.screen_cron)) },

app/src/main/java/com/m57/hermescontrol/ui/cron/CronJobsViewModel.kt

@@ -6,6 +6,8 @@ import com.m57.hermescontrol.data.model.CronJob
 import com.m57.hermescontrol.data.remote.ApiClient
 import com.m57.hermescontrol.data.remote.NetworkResult
 import com.m57.hermescontrol.data.remote.safeApiCall
+import com.m57.hermescontrol.ui.common.ToastHost
+import com.m57.hermescontrol.ui.common.safeLaunchLoad
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -21,32 +23,26 @@ data class CronJobsUiState(
     val toastMessage: String? = null,
 )
 
-class CronJobsViewModel : ViewModel() {
+class CronJobsViewModel : ViewModel(), ToastHost {
     private val _uiState = MutableStateFlow(CronJobsUiState())
     val uiState: StateFlow<CronJobsUiState> = _uiState.asStateFlow()
 
     fun loadCronJobs() {
-        _uiState.update { it.copy(isLoading = true, errorMessage = null) }
-        viewModelScope.launch {
-            val result =
-                withContext(Dispatchers.IO) {
-                    safeApiCall { ApiClient.hermesApi.getCronJobs() }
+        safeLaunchLoad(
+            apiCall = { safeApiCall { ApiClient.hermesApi.getCronJobs() } },
+            onStart = { _uiState.update { it.copy(isLoading = true, errorMessage = null) } },
+            onSuccess = { data ->
+                _uiState.update { it.copy(isLoading = false, jobs = data.orEmpty()) }
+            },
+            onError = { errorMsg ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        errorMessage = "Failed to load cron jobs: $errorMsg",
+                    )
                 }
-            when (result) {
-                is NetworkResult.Success -> {
-                    _uiState.update { it.copy(isLoading = false, jobs = result.data.orEmpty()) }
-                }
-
-                is NetworkResult.Failure -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            errorMessage = "Failed to load cron jobs: ${result.error.message}",
-                        )
-                    }
-                }
-            }
-        }
+            },
+        )
     }
 
     fun pauseCronJob(id: String) {
@@ -135,7 +131,7 @@ class CronJobsViewModel : ViewModel() {
         _uiState.update { it.copy(jobs = originalJobs, toastMessage = errorMsg) }
     }
 
-    fun clearToast() {
+    override fun clearToast() {
         _uiState.update { it.copy(toastMessage = null) }
     }
 }

app/src/main/java/com/m57/hermescontrol/ui/gateway/GatewayScreen.kt

@@ -1,6 +1,5 @@
 package com.m57.hermescontrol.ui.gateway
 
-import android.widget.Toast
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -31,7 +30,6 @@ import androidx.compose.runtime.getValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
@@ -41,6 +39,7 @@ import com.m57.hermescontrol.R
 import com.m57.hermescontrol.ui.common.ErrorState
 import com.m57.hermescontrol.ui.common.HermesScaffold
 import com.m57.hermescontrol.ui.common.LoadingState
+import com.m57.hermescontrol.ui.common.ToastEffect
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -50,18 +49,12 @@ fun GatewayScreen(
     viewModel: GatewayViewModel = viewModel { GatewayViewModel() },
 ) {
     val state by viewModel.uiState.collectAsStateWithLifecycle()
-    val context = LocalContext.current
 
     LaunchedEffect(Unit) {
         viewModel.loadStatus()
     }
 
-    LaunchedEffect(state.toastMessage) {
-        state.toastMessage?.let { msg ->
-            Toast.makeText(context, msg, Toast.LENGTH_SHORT).show()
-            viewModel.clearToast()
-        }
-    }
+    ToastEffect(toastMessage = state.toastMessage, onClearToast = viewModel::clearToast)
 
     HermesScaffold(
         title = { Text(stringResource(R.string.screen_gateway)) },

app/src/main/java/com/m57/hermescontrol/ui/gateway/GatewayViewModel.kt

@@ -6,6 +6,8 @@ import com.m57.hermescontrol.data.model.StatusResponse
 import com.m57.hermescontrol.data.remote.ApiClient
 import com.m57.hermescontrol.data.remote.NetworkResult
 import com.m57.hermescontrol.data.remote.safeApiCall
+import com.m57.hermescontrol.ui.common.ToastHost
+import com.m57.hermescontrol.ui.common.safeLaunchLoad
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -22,32 +24,26 @@ data class GatewayUiState(
     val toastMessage: String? = null,
 )
 
-class GatewayViewModel : ViewModel() {
+class GatewayViewModel : ViewModel(), ToastHost {
     private val _uiState = MutableStateFlow(GatewayUiState())
     val uiState: StateFlow<GatewayUiState> = _uiState.asStateFlow()
 
     fun loadStatus() {
-        _uiState.update { it.copy(isLoading = true, errorMessage = null) }
-        viewModelScope.launch {
-            val result =
-                withContext(Dispatchers.IO) {
-                    safeApiCall { ApiClient.hermesApi.getStatus() }
+        safeLaunchLoad(
+            apiCall = { safeApiCall { ApiClient.hermesApi.getStatus() } },
+            onStart = { _uiState.update { it.copy(isLoading = true, errorMessage = null) } },
+            onSuccess = { data ->
+                _uiState.update { it.copy(isLoading = false, status = data) }
+            },
+            onError = { errorMsg ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        errorMessage = "Failed to load status: $errorMsg",
+                    )
                 }
-            when (result) {
-                is NetworkResult.Success -> {
-                    _uiState.update { it.copy(isLoading = false, status = result.data) }
-                }
-
-                is NetworkResult.Failure -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            errorMessage = "Failed to load status: ${result.error.message}",
-                        )
-                    }
-                }
-            }
-        }
+            },
+        )
     }
 
     fun startGateway() {
@@ -92,7 +88,7 @@ class GatewayViewModel : ViewModel() {
         }
     }
 
-    fun clearToast() {
+    override fun clearToast() {
         _uiState.update { it.copy(toastMessage = null) }
     }
 }

app/src/main/java/com/m57/hermescontrol/ui/kanban/KanbanScreen.kt

@@ -1,6 +1,5 @@
 package com.m57.hermescontrol.ui.kanban
 
-import android.widget.Toast
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -38,7 +37,6 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
@@ -50,6 +48,7 @@ import com.m57.hermescontrol.ui.common.ErrorState
 import com.m57.hermescontrol.ui.common.HermesScaffold
 import com.m57.hermescontrol.ui.common.LoadingState
 import com.m57.hermescontrol.ui.common.SearchBar
+import com.m57.hermescontrol.ui.common.ToastEffect
 
 private const val DEFAULT_COLUMN = "todo"
 
@@ -61,7 +60,6 @@ fun KanbanScreen(
     viewModel: KanbanViewModel = viewModel { KanbanViewModel() },
 ) {
     val state by viewModel.uiState.collectAsStateWithLifecycle()
-    val context = LocalContext.current
 
     var query by remember { mutableStateOf("") }
 
@@ -80,12 +78,7 @@ fun KanbanScreen(
         viewModel.loadBoards()
     }
 
-    LaunchedEffect(state.toastMessage) {
-        state.toastMessage?.let { msg ->
-            Toast.makeText(context, msg, Toast.LENGTH_SHORT).show()
-            viewModel.clearToast()
-        }
-    }
+    ToastEffect(toastMessage = state.toastMessage, onClearToast = viewModel::clearToast)
 
     HermesScaffold(
         title = { Text(stringResource(R.string.kanban_board_title)) },

app/src/main/java/com/m57/hermescontrol/ui/kanban/KanbanViewModel.kt

@@ -8,6 +8,8 @@ import com.m57.hermescontrol.data.model.KanbanTask
 import com.m57.hermescontrol.data.remote.ApiClient
 import com.m57.hermescontrol.data.remote.NetworkResult
 import com.m57.hermescontrol.data.remote.safeApiCall
+import com.m57.hermescontrol.ui.common.ToastHost
+import com.m57.hermescontrol.ui.common.safeLaunchLoad
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -26,38 +28,32 @@ data class KanbanUiState(
     val toastMessage: String? = null,
 )
 
-class KanbanViewModel : ViewModel() {
+class KanbanViewModel : ViewModel(), ToastHost {
     private val _uiState = MutableStateFlow(KanbanUiState())
     val uiState: StateFlow<KanbanUiState> = _uiState.asStateFlow()
 
     fun loadBoards() {
-        _uiState.update { it.copy(isLoading = true, errorMessage = null) }
-        viewModelScope.launch {
-            val result =
-                withContext(Dispatchers.IO) {
-                    safeApiCall { ApiClient.hermesApi.getKanbanBoards() }
+        safeLaunchLoad(
+            apiCall = { safeApiCall { ApiClient.hermesApi.getKanbanBoards() } },
+            onStart = { _uiState.update { it.copy(isLoading = true, errorMessage = null) } },
+            onSuccess = { data ->
+                val boards = data.boards.orEmpty()
+                _uiState.update { it.copy(isLoading = false, boards = boards) }
+                val currentSlug = data.current
+                val currentBoard = boards.find { it.id == currentSlug } ?: boards.firstOrNull()
+                if (currentBoard != null) {
+                    selectBoard(currentBoard)
                 }
-            when (result) {
-                is NetworkResult.Success -> {
-                    val boards = result.data.boards.orEmpty()
-                    _uiState.update { it.copy(isLoading = false, boards = boards) }
-                    val currentSlug = result.data.current
-                    val currentBoard = boards.find { it.id == currentSlug } ?: boards.firstOrNull()
-                    if (currentBoard != null) {
-                        selectBoard(currentBoard)
-                    }
+            },
+            onError = { errorMsg ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        errorMessage = "Failed to load Kanban boards: $errorMsg",
+                    )
                 }
-
-                is NetworkResult.Failure -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            errorMessage = "Failed to load Kanban boards: ${result.error.message}",
-                        )
-                    }
-                }
-            }
-        }
+            },
+        )
     }
 
     fun selectBoard(board: KanbanBoard) {
@@ -183,7 +179,7 @@ class KanbanViewModel : ViewModel() {
         }
     }
 
-    fun clearToast() {
+    override fun clearToast() {
         _uiState.update { it.copy(toastMessage = null) }
     }
 }

app/src/main/java/com/m57/hermescontrol/ui/keys/KeysScreen.kt

@@ -1,6 +1,5 @@
 package com.m57.hermescontrol.ui.keys
 
-import android.widget.Toast
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -34,7 +33,6 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.unit.dp
@@ -46,6 +44,7 @@ import com.m57.hermescontrol.ui.common.ErrorState
 import com.m57.hermescontrol.ui.common.HermesScaffold
 import com.m57.hermescontrol.ui.common.LoadingState
 import com.m57.hermescontrol.ui.common.SearchBar
+import com.m57.hermescontrol.ui.common.ToastEffect
 import com.m57.hermescontrol.ui.common.listContentPadding
 import com.m57.hermescontrol.ui.common.listItemSpacing
 
@@ -57,7 +56,6 @@ fun KeysScreen(
     viewModel: KeysViewModel = viewModel { KeysViewModel() },
 ) {
     val state by viewModel.uiState.collectAsStateWithLifecycle()
-    val context = LocalContext.current
 
     var query by remember { mutableStateOf("") }
 
@@ -73,12 +71,7 @@ fun KeysScreen(
         viewModel.loadKeys()
     }
 
-    LaunchedEffect(state.toastMessage) {
-        state.toastMessage?.let { msg ->
-            Toast.makeText(context, msg, Toast.LENGTH_SHORT).show()
-            viewModel.clearToast()
-        }
-    }
+    ToastEffect(toastMessage = state.toastMessage, onClearToast = viewModel::clearToast)
 
     HermesScaffold(
         title = { Text(stringResource(R.string.screen_keys)) },

app/src/main/java/com/m57/hermescontrol/ui/keys/KeysViewModel.kt

@@ -8,6 +8,8 @@ import com.m57.hermescontrol.data.model.EnvVarUpdate
 import com.m57.hermescontrol.data.remote.ApiClient
 import com.m57.hermescontrol.data.remote.NetworkResult
 import com.m57.hermescontrol.data.remote.safeApiCall
+import com.m57.hermescontrol.ui.common.ToastHost
+import com.m57.hermescontrol.ui.common.safeLaunchLoad
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -24,37 +26,31 @@ data class KeysUiState(
     val toastMessage: String? = null,
 )
 
-class KeysViewModel : ViewModel() {
+class KeysViewModel : ViewModel(), ToastHost {
     private val _uiState = MutableStateFlow(KeysUiState())
     val uiState: StateFlow<KeysUiState> = _uiState.asStateFlow()
 
     fun loadKeys(reveal: Boolean = false) {
-        _uiState.update { it.copy(isLoading = true, errorMessage = null) }
-        viewModelScope.launch {
-            val result =
-                withContext(Dispatchers.IO) {
-                    safeApiCall { ApiClient.hermesApi.getEnvVars() }
+        safeLaunchLoad(
+            apiCall = { safeApiCall { ApiClient.hermesApi.getEnvVars() } },
+            onStart = { _uiState.update { it.copy(isLoading = true, errorMessage = null) } },
+            onSuccess = { data ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        envVars = data.orEmpty(),
+                    )
                 }
-            when (result) {
-                is NetworkResult.Success -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            envVars = result.data.orEmpty(),
-                        )
-                    }
+            },
+            onError = { errorMsg ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        errorMessage = "Failed to load keys: $errorMsg",
+                    )
                 }
-
-                is NetworkResult.Failure -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            errorMessage = "Failed to load keys: ${result.error.message}",
-                        )
-                    }
-                }
-            }
-        }
+            },
+        )
     }
 
     fun revealKey(key: String) {
@@ -110,7 +106,7 @@ class KeysViewModel : ViewModel() {
         }
     }
 
-    fun clearToast() {
+    override fun clearToast() {
         _uiState.update { it.copy(toastMessage = null) }
     }
 }

app/src/main/java/com/m57/hermescontrol/ui/logs/LogsScreen.kt

@@ -1,6 +1,5 @@
 package com.m57.hermescontrol.ui.logs
 
-import android.widget.Toast
 import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.PaddingValues
 import androidx.compose.foundation.layout.fillMaxSize
@@ -20,7 +19,6 @@ import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.unit.dp
@@ -34,6 +32,7 @@ import com.m57.hermescontrol.ui.common.ErrorState
 import com.m57.hermescontrol.ui.common.HermesScaffold
 import com.m57.hermescontrol.ui.common.LoadingState
 import com.m57.hermescontrol.ui.common.SearchBar
+import com.m57.hermescontrol.ui.common.ToastEffect
 
 @Composable
 fun LogsScreen(
@@ -42,7 +41,6 @@ fun LogsScreen(
     viewModel: LogsViewModel = viewModel { LogsViewModel() },
 ) {
     val state by viewModel.uiState.collectAsStateWithLifecycle()
-    val context = LocalContext.current
     val spacing = LocalSpacing.current
     val listState = rememberLazyListState()
 
@@ -59,12 +57,7 @@ fun LogsScreen(
         viewModel.loadLogs()
     }
 
-    LaunchedEffect(state.toastMessage) {
-        state.toastMessage?.let { msg ->
-            Toast.makeText(context, msg, Toast.LENGTH_SHORT).show()
-            viewModel.clearToast()
-        }
-    }
+    ToastEffect(toastMessage = state.toastMessage, onClearToast = viewModel::clearToast)
 
     // Auto scroll to bottom when new logs arrive
     LaunchedEffect(filteredLogs.size) {

app/src/main/java/com/m57/hermescontrol/ui/logs/LogsViewModel.kt

@@ -1,17 +1,14 @@
 package com.m57.hermescontrol.ui.logs
 
 import androidx.lifecycle.ViewModel
-import androidx.lifecycle.viewModelScope
 import com.m57.hermescontrol.data.remote.ApiClient
-import com.m57.hermescontrol.data.remote.NetworkResult
 import com.m57.hermescontrol.data.remote.safeApiCall
-import kotlinx.coroutines.Dispatchers
+import com.m57.hermescontrol.ui.common.ToastHost
+import com.m57.hermescontrol.ui.common.safeLaunchLoad
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.update
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
 
 data class LogsUiState(
     val isLoading: Boolean = false,
@@ -20,37 +17,31 @@ data class LogsUiState(
     val toastMessage: String? = null,
 )
 
-class LogsViewModel : ViewModel() {
+class LogsViewModel : ViewModel(), ToastHost {
     private val _uiState = MutableStateFlow(LogsUiState())
     val uiState: StateFlow<LogsUiState> = _uiState.asStateFlow()
 
     fun loadLogs() {
-        _uiState.update { it.copy(isLoading = true, errorMessage = null) }
-        viewModelScope.launch {
-            val result =
-                withContext(Dispatchers.IO) {
-                    safeApiCall { ApiClient.hermesApi.getLogs() }
+        safeLaunchLoad(
+            apiCall = { safeApiCall { ApiClient.hermesApi.getLogs() } },
+            onStart = { _uiState.update { it.copy(isLoading = true, errorMessage = null) } },
+            onSuccess = { data ->
+                val body = data
+                val logsList = body.lines ?: body.logs ?: emptyList()
+                _uiState.update { it.copy(isLoading = false, logs = logsList) }
+            },
+            onError = { errorMsg ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        errorMessage = "Failed to load logs: $errorMsg",
+                    )
                 }
-            when (result) {
-                is NetworkResult.Success -> {
-                    val body = result.data
-                    val logsList = body.lines ?: body.logs ?: emptyList()
-                    _uiState.update { it.copy(isLoading = false, logs = logsList) }
-                }
-
-                is NetworkResult.Failure -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            errorMessage = "Failed to load logs: ${result.error.message}",
-                        )
-                    }
-                }
-            }
-        }
+            },
+        )
     }
 
-    fun clearToast() {
+    override fun clearToast() {
         _uiState.update { it.copy(toastMessage = null) }
     }
 }

app/src/main/java/com/m57/hermescontrol/ui/mcp/McpServersScreen.kt

@@ -1,6 +1,5 @@
 package com.m57.hermescontrol.ui.mcp
 
-import android.widget.Toast
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -29,7 +28,6 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.text.font.FontWeight
@@ -41,6 +39,7 @@ import com.m57.hermescontrol.ui.common.ErrorState
 import com.m57.hermescontrol.ui.common.HermesScaffold
 import com.m57.hermescontrol.ui.common.LoadingState
 import com.m57.hermescontrol.ui.common.SearchBar
+import com.m57.hermescontrol.ui.common.ToastEffect
 import com.m57.hermescontrol.ui.common.listContentPadding
 import com.m57.hermescontrol.ui.common.listItemSpacing
 
@@ -52,7 +51,6 @@ fun McpServersScreen(
     viewModel: McpServersViewModel = viewModel { McpServersViewModel() },
 ) {
     val state by viewModel.uiState.collectAsStateWithLifecycle()
-    val context = LocalContext.current
 
     var query by remember { mutableStateOf("") }
 
@@ -69,12 +67,7 @@ fun McpServersScreen(
         viewModel.loadServers()
     }
 
-    LaunchedEffect(state.toastMessage) {
-        state.toastMessage?.let { msg ->
-            Toast.makeText(context, msg, Toast.LENGTH_SHORT).show()
-            viewModel.clearToast()
-        }
-    }
+    ToastEffect(toastMessage = state.toastMessage, onClearToast = viewModel::clearToast)
 
     HermesScaffold(
         title = { Text(stringResource(R.string.screen_mcp_servers)) },

app/src/main/java/com/m57/hermescontrol/ui/mcp/McpServersViewModel.kt

@@ -7,6 +7,8 @@ import com.m57.hermescontrol.data.model.McpServerToggleRequest
 import com.m57.hermescontrol.data.remote.ApiClient
 import com.m57.hermescontrol.data.remote.NetworkResult
 import com.m57.hermescontrol.data.remote.safeApiCall
+import com.m57.hermescontrol.ui.common.ToastHost
+import com.m57.hermescontrol.ui.common.safeLaunchLoad
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -23,37 +25,31 @@ data class McpServersUiState(
     val toastMessage: String? = null,
 )
 
-class McpServersViewModel : ViewModel() {
+class McpServersViewModel : ViewModel(), ToastHost {
     private val _uiState = MutableStateFlow(McpServersUiState())
     val uiState: StateFlow<McpServersUiState> = _uiState.asStateFlow()
 
     fun loadServers() {
-        _uiState.update { it.copy(isLoading = true, errorMessage = null) }
-        viewModelScope.launch {
-            val result =
-                withContext(Dispatchers.IO) {
-                    safeApiCall { ApiClient.hermesApi.getMcpServers() }
+        safeLaunchLoad(
+            apiCall = { safeApiCall { ApiClient.hermesApi.getMcpServers() } },
+            onStart = { _uiState.update { it.copy(isLoading = true, errorMessage = null) } },
+            onSuccess = { data ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        servers = data.servers.orEmpty(),
+                    )
                 }
-            when (result) {
-                is NetworkResult.Success -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            servers = result.data.servers.orEmpty(),
-                        )
-                    }
+            },
+            onError = { errorMsg ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        errorMessage = "Failed to load MCP servers: $errorMsg",
+                    )
                 }
-
-                is NetworkResult.Failure -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            errorMessage = "Failed to load MCP servers: ${result.error.message}",
-                        )
-                    }
-                }
-            }
-        }
+            },
+        )
     }
 
     fun toggleServer(server: McpServer) {
@@ -167,7 +163,7 @@ class McpServersViewModel : ViewModel() {
         }
     }
 
-    fun clearToast() {
+    override fun clearToast() {
         _uiState.update { it.copy(toastMessage = null) }
     }
 }

app/src/main/java/com/m57/hermescontrol/ui/model/ModelScreen.kt

@@ -1,6 +1,5 @@
 package com.m57.hermescontrol.ui.model
 
-import android.widget.Toast
 import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.foundation.BorderStroke
 import androidx.compose.foundation.layout.Arrangement
@@ -34,7 +33,6 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
@@ -46,6 +44,7 @@ import com.m57.hermescontrol.ui.common.ErrorState
 import com.m57.hermescontrol.ui.common.HermesScaffold
 import com.m57.hermescontrol.ui.common.LoadingState
 import com.m57.hermescontrol.ui.common.SearchBar
+import com.m57.hermescontrol.ui.common.ToastEffect
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -55,7 +54,6 @@ fun ModelScreen(
     viewModel: ModelViewModel = viewModel { ModelViewModel() },
 ) {
     val state by viewModel.uiState.collectAsStateWithLifecycle()
-    val context = LocalContext.current
     var expandedProviderSlug by remember { mutableStateOf<String?>(null) }
     var query by remember { mutableStateOf("") }
 
@@ -74,12 +72,7 @@ fun ModelScreen(
         viewModel.loadModelOptions()
     }
 
-    LaunchedEffect(state.toastMessage) {
-        state.toastMessage?.let { msg ->
-            Toast.makeText(context, msg, Toast.LENGTH_SHORT).show()
-            viewModel.clearToast()
-        }
-    }
+    ToastEffect(toastMessage = state.toastMessage, onClearToast = viewModel::clearToast)
 
     HermesScaffold(
         title = { Text(stringResource(R.string.screen_models)) },

app/src/main/java/com/m57/hermescontrol/ui/model/ModelViewModel.kt

@@ -8,6 +8,7 @@ import com.m57.hermescontrol.data.model.UpdateProfileModelRequest
 import com.m57.hermescontrol.data.remote.ApiClient
 import com.m57.hermescontrol.data.remote.NetworkResult
 import com.m57.hermescontrol.data.remote.safeApiCall
+import com.m57.hermescontrol.ui.common.ToastHost
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -24,7 +25,7 @@ data class ModelUiState(
     val toastMessage: String? = null,
 )
 
-class ModelViewModel : ViewModel() {
+class ModelViewModel : ViewModel(), ToastHost {
     private val _uiState = MutableStateFlow(ModelUiState())
     val uiState: StateFlow<ModelUiState> = _uiState.asStateFlow()
 
@@ -130,7 +131,7 @@ class ModelViewModel : ViewModel() {
         }
     }
 
-    fun clearToast() {
+    override fun clearToast() {
         _uiState.update { it.copy(toastMessage = null) }
     }
 }

app/src/main/java/com/m57/hermescontrol/ui/pairing/PairingScreen.kt

@@ -1,6 +1,5 @@
 package com.m57.hermescontrol.ui.pairing
 
-import android.widget.Toast
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -27,7 +26,6 @@ import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
@@ -37,6 +35,7 @@ import com.m57.hermescontrol.R
 import com.m57.hermescontrol.ui.common.ErrorState
 import com.m57.hermescontrol.ui.common.HermesScaffold
 import com.m57.hermescontrol.ui.common.LoadingState
+import com.m57.hermescontrol.ui.common.ToastEffect
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -46,18 +45,12 @@ fun PairingScreen(
     viewModel: PairingViewModel = viewModel { PairingViewModel() },
 ) {
     val state by viewModel.uiState.collectAsStateWithLifecycle()
-    val context = LocalContext.current
 
     LaunchedEffect(Unit) {
         viewModel.loadPairing()
     }
 
-    LaunchedEffect(state.toastMessage) {
-        state.toastMessage?.let { msg ->
-            Toast.makeText(context, msg, Toast.LENGTH_SHORT).show()
-            viewModel.clearToast()
-        }
-    }
+    ToastEffect(toastMessage = state.toastMessage, onClearToast = viewModel::clearToast)
 
     HermesScaffold(
         title = { Text(stringResource(R.string.pairing_screen_title)) },

app/src/main/java/com/m57/hermescontrol/ui/pairing/PairingViewModel.kt

@@ -8,6 +8,8 @@ import com.m57.hermescontrol.data.model.PairingRevokeRequest
 import com.m57.hermescontrol.data.remote.ApiClient
 import com.m57.hermescontrol.data.remote.NetworkResult
 import com.m57.hermescontrol.data.remote.safeApiCall
+import com.m57.hermescontrol.ui.common.ToastHost
+import com.m57.hermescontrol.ui.common.safeLaunchLoad
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -24,32 +26,26 @@ data class PairingUiState(
     val toastMessage: String? = null,
 )
 
-class PairingViewModel : ViewModel() {
+class PairingViewModel : ViewModel(), ToastHost {
     private val _uiState = MutableStateFlow(PairingUiState())
     val uiState: StateFlow<PairingUiState> = _uiState.asStateFlow()
 
     fun loadPairing() {
-        _uiState.update { it.copy(isLoading = true, errorMessage = null) }
-        viewModelScope.launch {
-            val result =
-                withContext(Dispatchers.IO) {
-                    safeApiCall { ApiClient.hermesApi.getPairing() }
+        safeLaunchLoad(
+            apiCall = { safeApiCall { ApiClient.hermesApi.getPairing() } },
+            onStart = { _uiState.update { it.copy(isLoading = true, errorMessage = null) } },
+            onSuccess = { data ->
+                _uiState.update { it.copy(isLoading = false, pairing = data) }
+            },
+            onError = { errorMsg ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        errorMessage = "Failed to load pairing info: $errorMsg",
+                    )
                 }
-            when (result) {
-                is NetworkResult.Success -> {
-                    _uiState.update { it.copy(isLoading = false, pairing = result.data) }
-                }
-
-                is NetworkResult.Failure -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            errorMessage = "Failed to load pairing info: ${result.error.message}",
-                        )
-                    }
-                }
-            }
-        }
+            },
+        )
     }
 
     fun approvePairing(
@@ -106,7 +102,7 @@ class PairingViewModel : ViewModel() {
         }
     }
 
-    fun clearToast() {
+    override fun clearToast() {
         _uiState.update { it.copy(toastMessage = null) }
     }
 }

app/src/main/java/com/m57/hermescontrol/ui/plugins/PluginsScreen.kt

@@ -1,6 +1,5 @@
 package com.m57.hermescontrol.ui.plugins
 
-import android.widget.Toast
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -29,7 +28,6 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
@@ -40,6 +38,7 @@ import com.m57.hermescontrol.ui.common.ErrorState
 import com.m57.hermescontrol.ui.common.HermesScaffold
 import com.m57.hermescontrol.ui.common.LoadingState
 import com.m57.hermescontrol.ui.common.SearchBar
+import com.m57.hermescontrol.ui.common.ToastEffect
 import com.m57.hermescontrol.ui.common.listContentPadding
 import com.m57.hermescontrol.ui.common.listItemSpacing
 
@@ -51,7 +50,6 @@ fun PluginsScreen(
     viewModel: PluginsViewModel = viewModel { PluginsViewModel() },
 ) {
     val state by viewModel.uiState.collectAsStateWithLifecycle()
-    val context = LocalContext.current
 
     var query by remember { mutableStateOf("") }
 
@@ -67,12 +65,7 @@ fun PluginsScreen(
         viewModel.loadPlugins()
     }
 
-    LaunchedEffect(state.toastMessage) {
-        state.toastMessage?.let { msg ->
-            Toast.makeText(context, msg, Toast.LENGTH_SHORT).show()
-            viewModel.clearToast()
-        }
-    }
+    ToastEffect(toastMessage = state.toastMessage, onClearToast = viewModel::clearToast)
 
     HermesScaffold(
         title = { Text(stringResource(R.string.screen_plugins)) },

app/src/main/java/com/m57/hermescontrol/ui/plugins/PluginsViewModel.kt

@@ -6,6 +6,8 @@ import com.m57.hermescontrol.data.model.PluginInfo
 import com.m57.hermescontrol.data.remote.ApiClient
 import com.m57.hermescontrol.data.remote.NetworkResult
 import com.m57.hermescontrol.data.remote.safeApiCall
+import com.m57.hermescontrol.ui.common.ToastHost
+import com.m57.hermescontrol.ui.common.safeLaunchLoad
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -21,33 +23,27 @@ data class PluginsUiState(
     val toastMessage: String? = null,
 )
 
-class PluginsViewModel : ViewModel() {
+class PluginsViewModel : ViewModel(), ToastHost {
     private val _uiState = MutableStateFlow(PluginsUiState())
     val uiState: StateFlow<PluginsUiState> = _uiState.asStateFlow()
 
     fun loadPlugins() {
-        _uiState.update { it.copy(isLoading = true, errorMessage = null) }
-        viewModelScope.launch {
-            val result =
-                withContext(Dispatchers.IO) {
-                    safeApiCall { ApiClient.hermesApi.getPlugins() }
+        safeLaunchLoad(
+            apiCall = { safeApiCall { ApiClient.hermesApi.getPlugins() } },
+            onStart = { _uiState.update { it.copy(isLoading = true, errorMessage = null) } },
+            onSuccess = { data ->
+                val plugins = data.plugins.orEmpty()
+                _uiState.update { it.copy(isLoading = false, plugins = plugins) }
+            },
+            onError = { errorMsg ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        errorMessage = "Failed to load plugins: $errorMsg",
+                    )
                 }
-            when (result) {
-                is NetworkResult.Success -> {
-                    val plugins = result.data.plugins.orEmpty()
-                    _uiState.update { it.copy(isLoading = false, plugins = plugins) }
-                }
-
-                is NetworkResult.Failure -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            errorMessage = "Failed to load plugins: ${result.error.message}",
-                        )
-                    }
-                }
-            }
-        }
+            },
+        )
     }
 
     fun togglePlugin(plugin: PluginInfo) {
@@ -165,7 +161,7 @@ class PluginsViewModel : ViewModel() {
         }
     }
 
-    fun clearToast() {
+    override fun clearToast() {
         _uiState.update { it.copy(toastMessage = null) }
     }
 }

app/src/main/java/com/m57/hermescontrol/ui/profiles/ProfilesScreen.kt

@@ -1,6 +1,5 @@
 package com.m57.hermescontrol.ui.profiles
 
-import android.widget.Toast
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -37,7 +36,6 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
@@ -48,6 +46,7 @@ import com.m57.hermescontrol.ui.common.EmptyState
 import com.m57.hermescontrol.ui.common.ErrorState
 import com.m57.hermescontrol.ui.common.HermesScaffold
 import com.m57.hermescontrol.ui.common.LoadingState
+import com.m57.hermescontrol.ui.common.ToastEffect
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -57,7 +56,6 @@ fun ProfilesScreen(
     viewModel: ProfilesViewModel = viewModel { ProfilesViewModel() },
 ) {
     val state by viewModel.uiState.collectAsStateWithLifecycle()
-    val context = LocalContext.current
 
     var soulEditProfileName by remember { mutableStateOf<String?>(null) }
     var modelEditProfileName by remember { mutableStateOf<String?>(null) }
@@ -68,12 +66,7 @@ fun ProfilesScreen(
         viewModel.loadProfiles()
     }
 
-    LaunchedEffect(state.toastMessage) {
-        state.toastMessage?.let { msg ->
-            Toast.makeText(context, msg, Toast.LENGTH_SHORT).show()
-            viewModel.clearToast()
-        }
-    }
+    ToastEffect(toastMessage = state.toastMessage, onClearToast = viewModel::clearToast)
 
     HermesScaffold(
         title = { Text(stringResource(R.string.screen_profiles)) },

app/src/main/java/com/m57/hermescontrol/ui/profiles/ProfilesViewModel.kt

@@ -9,6 +9,7 @@ import com.m57.hermescontrol.data.model.UpdateProfileSoulRequest
 import com.m57.hermescontrol.data.remote.ApiClient
 import com.m57.hermescontrol.data.remote.NetworkResult
 import com.m57.hermescontrol.data.remote.safeApiCall
+import com.m57.hermescontrol.ui.common.ToastHost
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -27,7 +28,7 @@ data class ProfilesUiState(
     val toastMessage: String? = null,
 )
 
-class ProfilesViewModel : ViewModel() {
+class ProfilesViewModel : ViewModel(), ToastHost {
     private val _uiState = MutableStateFlow(ProfilesUiState())
     val uiState: StateFlow<ProfilesUiState> = _uiState.asStateFlow()
 
@@ -189,7 +190,7 @@ class ProfilesViewModel : ViewModel() {
         }
     }
 
-    fun clearToast() {
+    override fun clearToast() {
         _uiState.update { it.copy(toastMessage = null) }
     }
 

app/src/main/java/com/m57/hermescontrol/ui/sessions/SessionsViewModel.kt

@@ -1,18 +1,14 @@
 package com.m57.hermescontrol.ui.sessions
 
 import androidx.lifecycle.ViewModel
-import androidx.lifecycle.viewModelScope
 import com.m57.hermescontrol.data.model.SessionInfo
 import com.m57.hermescontrol.data.remote.ApiClient
-import com.m57.hermescontrol.data.remote.NetworkResult
 import com.m57.hermescontrol.data.remote.safeApiCall
-import kotlinx.coroutines.Dispatchers
+import com.m57.hermescontrol.ui.common.safeLaunchLoad
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.flow.update
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
 
 data class SessionsUiState(
     val isLoading: Boolean = false,
@@ -25,31 +21,25 @@ class SessionsViewModel : ViewModel() {
     val uiState: StateFlow<SessionsUiState> = _uiState.asStateFlow()
 
     fun loadSessions() {
-        _uiState.update { it.copy(isLoading = true, errorMessage = null) }
-        viewModelScope.launch {
-            val result =
-                withContext(Dispatchers.IO) {
-                    safeApiCall { ApiClient.hermesApi.getSessions() }
+        safeLaunchLoad(
+            apiCall = { safeApiCall { ApiClient.hermesApi.getSessions() } },
+            onStart = { _uiState.update { it.copy(isLoading = true, errorMessage = null) } },
+            onSuccess = { data ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        sessions = data?.sessions.orEmpty(),
+                    )
                 }
-            when (result) {
-                is NetworkResult.Success -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            sessions = result.data?.sessions.orEmpty(),
-                        )
-                    }
+            },
+            onError = { errorMsg ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        errorMessage = "Failed to load sessions: $errorMsg",
+                    )
                 }
-
-                is NetworkResult.Failure -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            errorMessage = "Failed to load sessions: ${result.error.message}",
-                        )
-                    }
-                }
-            }
-        }
+            },
+        )
     }
 }

app/src/main/java/com/m57/hermescontrol/ui/skills/SkillsScreen.kt

@@ -1,6 +1,5 @@
 package com.m57.hermescontrol.ui.skills
 
-import android.widget.Toast
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -34,7 +33,6 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.TextStyle
 import androidx.compose.ui.text.font.FontFamily
@@ -52,6 +50,7 @@ import com.m57.hermescontrol.ui.common.FilterChipRow
 import com.m57.hermescontrol.ui.common.HermesScaffold
 import com.m57.hermescontrol.ui.common.LoadingState
 import com.m57.hermescontrol.ui.common.SearchBar
+import com.m57.hermescontrol.ui.common.ToastEffect
 import com.m57.hermescontrol.ui.common.listContentPadding
 import com.m57.hermescontrol.ui.common.listItemSpacing
 
@@ -62,7 +61,6 @@ fun SkillsScreen(
     viewModel: SkillsViewModel = viewModel { SkillsViewModel() },
 ) {
     val state by viewModel.uiState.collectAsStateWithLifecycle()
-    val context = LocalContext.current
     val spacing = LocalSpacing.current
     var query by remember { mutableStateOf("") }
     val statuses = listOf("All Statuses", "Enabled", "Disabled")
@@ -81,12 +79,7 @@ fun SkillsScreen(
         viewModel.loadSkills()
     }
 
-    LaunchedEffect(state.toastMessage) {
-        state.toastMessage?.let { msg ->
-            Toast.makeText(context, msg, Toast.LENGTH_SHORT).show()
-            viewModel.clearToast()
-        }
-    }
+    ToastEffect(toastMessage = state.toastMessage, onClearToast = viewModel::clearToast)
 
     val filtered =
         remember(state.skills, query, selectedStatus, selectedCategory) {

app/src/main/java/com/m57/hermescontrol/ui/skills/SkillsViewModel.kt

@@ -7,6 +7,8 @@ import com.m57.hermescontrol.data.model.ToggleSkillRequest
 import com.m57.hermescontrol.data.remote.ApiClient
 import com.m57.hermescontrol.data.remote.NetworkResult
 import com.m57.hermescontrol.data.remote.safeApiCall
+import com.m57.hermescontrol.ui.common.ToastHost
+import com.m57.hermescontrol.ui.common.safeLaunchLoad
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -27,32 +29,26 @@ data class SkillsUiState(
     val saveContentSuccess: Boolean = false,
 )
 
-class SkillsViewModel : ViewModel() {
+class SkillsViewModel : ViewModel(), ToastHost {
     private val _uiState = MutableStateFlow(SkillsUiState())
     val uiState: StateFlow<SkillsUiState> = _uiState.asStateFlow()
 
     fun loadSkills() {
-        _uiState.update { it.copy(isLoading = true, errorMessage = null) }
-        viewModelScope.launch {
-            val result =
-                withContext(Dispatchers.IO) {
-                    safeApiCall { ApiClient.hermesApi.getSkills() }
+        safeLaunchLoad(
+            apiCall = { safeApiCall { ApiClient.hermesApi.getSkills() } },
+            onStart = { _uiState.update { it.copy(isLoading = true, errorMessage = null) } },
+            onSuccess = { data ->
+                _uiState.update { it.copy(isLoading = false, skills = data.orEmpty()) }
+            },
+            onError = { errorMsg ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        errorMessage = "Failed to load skills: $errorMsg",
+                    )
                 }
-            when (result) {
-                is NetworkResult.Success -> {
-                    _uiState.update { it.copy(isLoading = false, skills = result.data.orEmpty()) }
-                }
-
-                is NetworkResult.Failure -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            errorMessage = "Failed to load skills: ${result.error.message}",
-                        )
-                    }
-                }
-            }
-        }
+            },
+        )
     }
 
     fun toggleSkill(skill: Skill) {
@@ -191,7 +187,7 @@ class SkillsViewModel : ViewModel() {
         _uiState.update { it.copy(saveContentSuccess = false) }
     }
 
-    fun clearToast() {
+    override fun clearToast() {
         _uiState.update { it.copy(toastMessage = null) }
     }
 }

app/src/main/java/com/m57/hermescontrol/ui/system/SystemScreen.kt

@@ -1,6 +1,5 @@
 package com.m57.hermescontrol.ui.system
 
-import android.widget.Toast
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.FlowRow
@@ -26,7 +25,6 @@ import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import androidx.lifecycle.viewmodel.compose.viewModel
@@ -42,6 +40,7 @@ import com.m57.hermescontrol.ui.common.SectionHeader
 import com.m57.hermescontrol.ui.common.StatCard
 import com.m57.hermescontrol.ui.common.StatusBadge
 import com.m57.hermescontrol.ui.common.StatusBadgeType
+import com.m57.hermescontrol.ui.common.ToastEffect
 
 @OptIn(androidx.compose.foundation.layout.ExperimentalLayoutApi::class)
 @Composable
@@ -51,7 +50,6 @@ fun SystemScreen(
     viewModel: SystemViewModel = viewModel { SystemViewModel() },
 ) {
     val state by viewModel.uiState.collectAsStateWithLifecycle()
-    val context = LocalContext.current
     val spacing = LocalSpacing.current
     val statusColors = LocalHermesStatusColors.current
 
@@ -59,12 +57,7 @@ fun SystemScreen(
         viewModel.loadSystemData()
     }
 
-    LaunchedEffect(state.toastMessage) {
-        state.toastMessage?.let { msg ->
-            Toast.makeText(context, msg, Toast.LENGTH_SHORT).show()
-            viewModel.clearToast()
-        }
-    }
+    ToastEffect(toastMessage = state.toastMessage, onClearToast = viewModel::clearToast)
 
     HermesScaffold(
         title = { Text(stringResource(R.string.screen_system)) },

app/src/main/java/com/m57/hermescontrol/ui/system/SystemViewModel.kt

@@ -9,6 +9,8 @@ import com.m57.hermescontrol.data.model.SystemStatsResponse
 import com.m57.hermescontrol.data.remote.ApiClient
 import com.m57.hermescontrol.data.remote.NetworkResult
 import com.m57.hermescontrol.data.remote.safeApiCall
+import com.m57.hermescontrol.ui.common.ToastHost
+import com.m57.hermescontrol.ui.common.safeLaunchLoad
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -25,7 +27,7 @@ data class SystemUiState(
     val toastMessage: String? = null,
 )
 
-class SystemViewModel : ViewModel() {
+class SystemViewModel : ViewModel(), ToastHost {
     companion object {
         private const val TAG = "SystemViewModel"
     }
@@ -34,34 +36,28 @@ class SystemViewModel : ViewModel() {
     val uiState: StateFlow<SystemUiState> = _uiState.asStateFlow()
 
     fun loadSystemData() {
-        _uiState.update { it.copy(isLoading = true, errorMessage = null) }
-        viewModelScope.launch {
-            val result =
-                withContext(Dispatchers.IO) {
-                    safeApiCall { ApiClient.hermesApi.getSystemStats() }
+        safeLaunchLoad(
+            apiCall = { safeApiCall { ApiClient.hermesApi.getSystemStats() } },
+            onStart = { _uiState.update { it.copy(isLoading = true, errorMessage = null) } },
+            onSuccess = { data ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        stats = data,
+                    )
                 }
-            when (result) {
-                is NetworkResult.Success -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            stats = result.data,
-                        )
-                    }
-                    // Doctor is optional; many servers do not expose it.
-                    loadDoctorReport()
+                // Doctor is optional; many servers do not expose it.
+                loadDoctorReport()
+            },
+            onError = { errorMsg ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        errorMessage = "Failed to load system stats: $errorMsg",
+                    )
                 }
-
-                is NetworkResult.Failure -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            errorMessage = "Failed to load system stats: ${result.error.message}",
-                        )
-                    }
-                }
-            }
-        }
+            },
+        )
     }
 
     private fun loadDoctorReport() {
@@ -96,7 +92,7 @@ class SystemViewModel : ViewModel() {
         }
     }
 
-    fun clearToast() {
+    override fun clearToast() {
         _uiState.update { it.copy(toastMessage = null) }
     }
 }

app/src/main/java/com/m57/hermescontrol/ui/toolsets/ToolsetsScreen.kt

@@ -1,6 +1,5 @@
 package com.m57.hermescontrol.ui.toolsets
 
-import android.widget.Toast
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -33,7 +32,6 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.unit.dp
@@ -45,6 +43,7 @@ import com.m57.hermescontrol.ui.common.ErrorState
 import com.m57.hermescontrol.ui.common.HermesScaffold
 import com.m57.hermescontrol.ui.common.LoadingState
 import com.m57.hermescontrol.ui.common.SearchBar
+import com.m57.hermescontrol.ui.common.ToastEffect
 import com.m57.hermescontrol.ui.common.listContentPadding
 import com.m57.hermescontrol.ui.common.listItemSpacing
 
@@ -56,7 +55,6 @@ fun ToolsetsScreen(
     viewModel: ToolsetsViewModel = viewModel { ToolsetsViewModel() },
 ) {
     val state by viewModel.uiState.collectAsStateWithLifecycle()
-    val context = LocalContext.current
 
     var query by remember { mutableStateOf("") }
 
@@ -73,12 +71,7 @@ fun ToolsetsScreen(
         viewModel.loadToolsets()
     }
 
-    LaunchedEffect(state.toastMessage) {
-        state.toastMessage?.let { msg ->
-            Toast.makeText(context, msg, Toast.LENGTH_SHORT).show()
-            viewModel.clearToast()
-        }
-    }
+    ToastEffect(toastMessage = state.toastMessage, onClearToast = viewModel::clearToast)
 
     HermesScaffold(
         title = { Text(stringResource(R.string.screen_toolsets)) },

app/src/main/java/com/m57/hermescontrol/ui/toolsets/ToolsetsViewModel.kt

@@ -7,6 +7,8 @@ import com.m57.hermescontrol.data.model.ToolsetToggleRequest
 import com.m57.hermescontrol.data.remote.ApiClient
 import com.m57.hermescontrol.data.remote.NetworkResult
 import com.m57.hermescontrol.data.remote.safeApiCall
+import com.m57.hermescontrol.ui.common.ToastHost
+import com.m57.hermescontrol.ui.common.safeLaunchLoad
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -22,32 +24,26 @@ data class ToolsetsUiState(
     val toastMessage: String? = null,
 )
 
-class ToolsetsViewModel : ViewModel() {
+class ToolsetsViewModel : ViewModel(), ToastHost {
     private val _uiState = MutableStateFlow(ToolsetsUiState())
     val uiState: StateFlow<ToolsetsUiState> = _uiState.asStateFlow()
 
     fun loadToolsets() {
-        _uiState.update { it.copy(isLoading = true, errorMessage = null) }
-        viewModelScope.launch {
-            val result =
-                withContext(Dispatchers.IO) {
-                    safeApiCall { ApiClient.hermesApi.getToolsets() }
+        safeLaunchLoad(
+            apiCall = { safeApiCall { ApiClient.hermesApi.getToolsets() } },
+            onStart = { _uiState.update { it.copy(isLoading = true, errorMessage = null) } },
+            onSuccess = { data ->
+                _uiState.update { it.copy(isLoading = false, toolsets = data.orEmpty()) }
+            },
+            onError = { errorMsg ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        errorMessage = "Failed to load toolsets: $errorMsg",
+                    )
                 }
-            when (result) {
-                is NetworkResult.Success -> {
-                    _uiState.update { it.copy(isLoading = false, toolsets = result.data.orEmpty()) }
-                }
-
-                is NetworkResult.Failure -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            errorMessage = "Failed to load toolsets: ${result.error.message}",
-                        )
-                    }
-                }
-            }
-        }
+            },
+        )
     }
 
     fun toggleToolset(toolset: Toolset) {
@@ -91,7 +87,7 @@ class ToolsetsViewModel : ViewModel() {
         }
     }
 
-    fun clearToast() {
+    override fun clearToast() {
         _uiState.update { it.copy(toastMessage = null) }
     }
 }

app/src/main/java/com/m57/hermescontrol/ui/webhooks/WebhooksScreen.kt

@@ -1,6 +1,5 @@
 package com.m57.hermescontrol.ui.webhooks
 
-import android.widget.Toast
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
@@ -30,7 +29,6 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
-import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.text.font.FontWeight
@@ -42,6 +40,7 @@ import com.m57.hermescontrol.ui.common.ErrorState
 import com.m57.hermescontrol.ui.common.HermesScaffold
 import com.m57.hermescontrol.ui.common.LoadingState
 import com.m57.hermescontrol.ui.common.SearchBar
+import com.m57.hermescontrol.ui.common.ToastEffect
 import com.m57.hermescontrol.ui.common.listContentPadding
 import com.m57.hermescontrol.ui.common.listItemSpacing
 
@@ -53,7 +52,6 @@ fun WebhooksScreen(
     viewModel: WebhooksViewModel = viewModel { WebhooksViewModel() },
 ) {
     val state by viewModel.uiState.collectAsStateWithLifecycle()
-    val context = LocalContext.current
 
     var query by remember { mutableStateOf("") }
 
@@ -69,12 +67,7 @@ fun WebhooksScreen(
         viewModel.loadWebhooks()
     }
 
-    LaunchedEffect(state.toastMessage) {
-        state.toastMessage?.let { msg ->
-            Toast.makeText(context, msg, Toast.LENGTH_SHORT).show()
-            viewModel.clearToast()
-        }
-    }
+    ToastEffect(toastMessage = state.toastMessage, onClearToast = viewModel::clearToast)
 
     HermesScaffold(
         title = { Text(stringResource(R.string.screen_webhooks)) },

app/src/main/java/com/m57/hermescontrol/ui/webhooks/WebhooksViewModel.kt

@@ -7,6 +7,8 @@ import com.m57.hermescontrol.data.model.WebhooksToggleRequest
 import com.m57.hermescontrol.data.remote.ApiClient
 import com.m57.hermescontrol.data.remote.NetworkResult
 import com.m57.hermescontrol.data.remote.safeApiCall
+import com.m57.hermescontrol.ui.common.ToastHost
+import com.m57.hermescontrol.ui.common.safeLaunchLoad
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
@@ -25,40 +27,34 @@ data class WebhooksUiState(
     val toastMessage: String? = null,
 )
 
-class WebhooksViewModel : ViewModel() {
+class WebhooksViewModel : ViewModel(), ToastHost {
     private val _uiState = MutableStateFlow(WebhooksUiState())
     val uiState: StateFlow<WebhooksUiState> = _uiState.asStateFlow()
 
     fun loadWebhooks() {
-        _uiState.update { it.copy(isLoading = true, errorMessage = null) }
-        viewModelScope.launch {
-            val result =
-                withContext(Dispatchers.IO) {
-                    safeApiCall { ApiClient.hermesApi.getWebhooks() }
+        safeLaunchLoad(
+            apiCall = { safeApiCall { ApiClient.hermesApi.getWebhooks() } },
+            onStart = { _uiState.update { it.copy(isLoading = true, errorMessage = null) } },
+            onSuccess = { data ->
+                val body = data
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        enabled = body.enabled,
+                        baseUrl = body.base_url,
+                        subscriptions = body.subscriptions.orEmpty(),
+                    )
                 }
-            when (result) {
-                is NetworkResult.Success -> {
-                    val body = result.data
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            enabled = body.enabled,
-                            baseUrl = body.base_url,
-                            subscriptions = body.subscriptions.orEmpty(),
-                        )
-                    }
+            },
+            onError = { errorMsg ->
+                _uiState.update {
+                    it.copy(
+                        isLoading = false,
+                        errorMessage = "Failed to load webhooks: $errorMsg",
+                    )
                 }
-
-                is NetworkResult.Failure -> {
-                    _uiState.update {
-                        it.copy(
-                            isLoading = false,
-                            errorMessage = "Failed to load webhooks: ${result.error.message}",
-                        )
-                    }
-                }
-            }
-        }
+            },
+        )
     }
 
     fun toggleWebhooks(targetEnabled: Boolean) {
@@ -92,7 +88,7 @@ class WebhooksViewModel : ViewModel() {
         }
     }
 
-    fun clearToast() {
+    override fun clearToast() {
         _uiState.update { it.copy(toastMessage = null) }
     }
 }