test: de-poison unit suite — drop static Dispatchers mocks, kill leaked WS timers (#833)

Co-authored-by: M57 <hy4ri@users.noreply.github.com>

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

@@ -3,10 +3,8 @@ 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.Job
 import kotlinx.coroutines.launch
-import kotlinx.coroutines.withContext
 
 interface ToastHost {
     fun clearToast()
@@ -22,7 +20,11 @@ inline fun <T> ViewModel.safeLaunchLoad(
     if (currentJob?.isActive == true) return currentJob
     onStart()
     return viewModelScope.launch {
-        val result = withContext(Dispatchers.IO) { apiCall() }
+        // No withContext(Dispatchers.IO) hop: Retrofit suspend calls already
+        // run off the caller thread, and an explicit hop forces every
+        // consuming test to fake Dispatchers.IO with a static mock — the
+        // JVM-wide bleed that flakes the suite (see the de-poisoned tests).
+        val result = apiCall()
         when (result) {
             is NetworkResult.Success -> onSuccess(result.data)
             is NetworkResult.Failure -> onError(result.error.message)