chore: eliminate all Kotlin compiler warnings in main source (#877)

* chore: eliminate all Kotlin compiler warnings in main source

* test(chat): fix cross-class coroutine leaks poisoning the unit suite

- ChatUpdateCommandTest: inject FakeSlashUsageStore — the real DataStore
  store inits on real IO threads with a relaxed-mock app (cacheDir NPE)
  and leaks an uncaught exception into the next runTest class.
- ChatUpdateCommandTest + SlashCommandDispatchRpcTest: mock
  ProfileSwitchCoordinator.switched (ChatViewModelTest pattern) — VMs
  otherwise park collectors on the singleton flow that crash later
  classes (ProfileSwitchCoordinatorTest) on stale-Main resumption.

Full suite: 944 tests, 0 failures (was 2 flaky per run).

---------

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

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

@@ -1,5 +1,6 @@
 package com.m57.hermescontrol.ui.profiles
 
+import android.content.ClipData
 import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
@@ -41,11 +42,13 @@ import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.rememberCoroutineScope
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
-import androidx.compose.ui.platform.LocalClipboardManager
+import androidx.compose.ui.platform.ClipEntry
+import androidx.compose.ui.platform.LocalClipboard
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.AnnotatedString
 import androidx.compose.ui.text.font.FontFamily
@@ -64,6 +67,7 @@ import com.m57.hermescontrol.ui.common.ToastEffect
 import com.m57.hermescontrol.ui.model.components.ModelPickerDialog
 import com.m57.hermescontrol.ui.profiles.components.ProfileBuilderView
 import com.m57.hermescontrol.ui.profiles.components.validateProfileName
+import kotlinx.coroutines.launch
 
 @OptIn(ExperimentalMaterial3Api::class)
 @Composable
@@ -91,7 +95,8 @@ fun ProfilesScreen(
     var setupCmdProfileName by remember { mutableStateOf<String?>(null) }
     var copiedSetupCmd by remember { mutableStateOf(false) }
 
-    val clipboardManager = LocalClipboardManager.current
+    val clipboard = LocalClipboard.current
+    val scope = rememberCoroutineScope()
 
     var isBuildingProfile by remember { mutableStateOf(false) }
 
@@ -839,7 +844,8 @@ fun ProfilesScreen(
                 if (!state.isLoadingSetupCommand && state.setupCommand != null) {
                     Button(
                         onClick = {
-                            clipboardManager.setText(AnnotatedString(state.setupCommand.orEmpty()))
+                            val text = AnnotatedString(state.setupCommand.orEmpty())
+                            scope.launch { clipboard.setClipEntry(ClipEntry(ClipData.newPlainText(null, text))) }
                             copiedSetupCmd = true
                         },
                     ) {