feat(profiles): first-class profile switching — phase 0 baseline port (#820)

* feat(profiles): make profile switching actually scope the app (issue #781 follow-up)

* fix(profiles): inherit connection token when switching to same-dashboard profile (issue #781 follow-up)

* fix(chat): reset open session on profile switch + prefill login profile (desktop parity)

* fix(ws): inject profile into profile-scoped RPC params so chat follows the selected profile

* test(chat): de-poison SlashCommandDispatchRpcTest (drop static Dispatchers mock)

mockkStatic(Dispatchers::class) + a stubbed Dispatchers.IO bleeds JVM-wide and
breaks later classes in suite order (CI 2026-08-06: COMMAND_DISPATCH captures
cross-wired → ComparisonFailure on lower stack PRs). ChatViewModel gains an
injected ioDispatcher (38 sites); the slash test constructs the VM with the
test dispatcher so the IO stub is unnecessary.

---------

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

app/src/test/java/com/m57/hermescontrol/ui/chat/ChatViewModelTest.kt

@@ -63,6 +63,7 @@ class ChatViewModelTest {
     private val testDispatcher = StandardTestDispatcher()
     private val mockEventsFlow = MutableSharedFlow<WsEvent>(extraBufferCapacity = 64)
     private val mockConnectionStatus = MutableStateFlow(ConnectionStatus.DISCONNECTED)
+    private val mockSelectedProfileFlow = MutableStateFlow<String?>(null)
     private lateinit var app: Application
     private lateinit var fakeRepo: FakeChatPersistenceRepository
 
@@ -110,6 +111,7 @@ class ChatViewModelTest {
         every { AuthManager.getToken() } returns "test-token"
         every { AuthManager.getBaseUrl() } returns "http://test.local/"
         every { AuthManager.getSelectedProfileId() } returns null
+        every { AuthManager.selectedProfileFlow } returns mockSelectedProfileFlow
         every { AuthManager.isTypingEffectEnabled() } returns true
         every { AuthManager.getTypingEffectDelayMs() } returns 30
         every { AuthManager.isAutoReconnect() } returns false
@@ -241,6 +243,24 @@ class ChatViewModelTest {
             verify(atLeast = 1) { HermesWsClient.send(WsMethods.SESSION_CREATE, any(), any()) }
         }
 
+    @Test
+    fun profileSwitch_resetsOpenSessionAndReloadsSessionList() =
+        runTest {
+            val (viewModel, sessionId) = createViewModelWithSession()
+            assertEquals(sessionId, viewModel.uiState.value.currentSessionId)
+
+            // Selected profile changes (switch in ProfilesScreen) → chat must
+            // wipe the stale conversation and reload the session list
+            // (desktop's requestFreshSession parity — the gateway re-homes
+            // on profile switch and the old session id is no longer valid).
+            mockSelectedProfileFlow.value = "meow"
+            advanceUntilIdle()
+
+            assertNull(viewModel.uiState.value.currentSessionId)
+            assertEquals("Hermes", viewModel.uiState.value.chatTitle)
+            verify(atLeast = 1) { HermesWsClient.send(WsMethods.SESSION_LIST, any(), any()) }
+        }
+
     @Test
     fun testSlashCommand_fork_sendsSessionBranch() =
         runTest {

app/src/test/java/com/m57/hermescontrol/ui/chat/SlashCommandDispatchRpcTest.kt

@@ -55,7 +55,6 @@ class SlashCommandDispatchRpcTest {
     @Before
     fun setUp() {
         Dispatchers.setMain(testDispatcher)
-        val testMainDispatcher = Dispatchers.Main
         reqCount = 0
 
         mockkStatic(android.util.Log::class)
@@ -64,10 +63,11 @@ class SlashCommandDispatchRpcTest {
         every { android.util.Log.w(any(), any<String>()) } returns 0
         every { android.util.Log.e(any(), any(), any()) } returns 0
 
-        mockkStatic(Dispatchers::class)
-        every { Dispatchers.IO } returns testDispatcher
-        every { Dispatchers.Main } returns testMainDispatcher
-
+        // NOTE: no mockkStatic(Dispatchers) here — a static Dispatchers mock
+        // bleeds JVM-wide and breaks later classes (CI 2026-08-06: this
+        // class's own static IO mock cross-wired COMMAND_DISPATCH captures in
+        // suite order). setMain alone is safe — the slash-dispatch send path
+        // is synchronous (no IO hop).
         mockkObject(AuthManager)
         mockkObject(HermesWsClient)
         mockkObject(ApiClient)
@@ -110,7 +110,7 @@ class SlashCommandDispatchRpcTest {
     }
 
     private suspend fun TestScope.createViewModelWithSession(): Pair<ChatViewModel, String> {
-        val vm = ChatViewModel(app, false, fakeRepo)
+        val vm = ChatViewModel(app, false, fakeRepo, ioDispatcher = testDispatcher)
         advanceUntilIdle()
         mockConnectionStatus.value = ConnectionStatus.CONNECTED
         mockEventsFlow.emit(WsEvent.GatewayReady(null))