feat: support session-level hidden flag in SessionListResponse and SessionsScreen (#1033)

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

app/src/test/java/com/m57/hermescontrol/ui/common/RefreshOnChangeTest.kt

@@ -31,13 +31,19 @@ class RefreshOnChangeTest {
 
     private class TestViewModel : ViewModel() {
         val state = MutableStateFlow("initial")
+        var job: kotlinx.coroutines.Job? = null
 
         init {
-            refreshOnChange(
-                eventType = ChangeEvents.CRON,
-                apiCall = { NetworkResult.Success("refreshed") },
-                onSuccess = { state.value = it },
-            )
+            job =
+                refreshOnChange(
+                    eventType = ChangeEvents.CRON,
+                    apiCall = { NetworkResult.Success("refreshed") },
+                    onSuccess = { state.value = it },
+                )
+        }
+
+        fun cleanup() {
+            job?.cancel()
         }
     }
 
@@ -55,23 +61,31 @@ class RefreshOnChangeTest {
     fun testRefreshOnChange_updatesOnMatchingEvent() =
         runTest(testDispatcher) {
             val viewModel = TestViewModel()
-            // Let the init coroutine run so the collector actually subscribes
-            // before the event fires (replay=0 — events before subscription
-            // are dropped, matching production where VMs subscribe at
-            // construction and events arrive afterwards).
-            advanceUntilIdle()
-            ChangeEventHub.emit(WsEvent.ChangeEvent(ChangeEvents.CRON))
-            advanceUntilIdle()
-            assertEquals("refreshed", viewModel.state.value)
+            try {
+                // Let the init coroutine run so the collector actually subscribes
+                // before the event fires (replay=0 — events before subscription
+                // are dropped, matching production where VMs subscribe at
+                // construction and events arrive afterwards).
+                advanceUntilIdle()
+                ChangeEventHub.emit(WsEvent.ChangeEvent(ChangeEvents.CRON))
+                advanceUntilIdle()
+                assertEquals("refreshed", viewModel.state.value)
+            } finally {
+                viewModel.cleanup()
+            }
         }
 
     @Test
     fun testRefreshOnChange_ignoresOtherEventTypes() =
         runTest(testDispatcher) {
             val viewModel = TestViewModel()
-            advanceUntilIdle()
-            ChangeEventHub.emit(WsEvent.ChangeEvent(ChangeEvents.SESSIONS))
-            advanceUntilIdle()
-            assertEquals("initial", viewModel.state.value)
+            try {
+                advanceUntilIdle()
+                ChangeEventHub.emit(WsEvent.ChangeEvent(ChangeEvents.SESSIONS))
+                advanceUntilIdle()
+                assertEquals("initial", viewModel.state.value)
+            } finally {
+                viewModel.cleanup()
+            }
         }
 }

app/src/test/java/com/m57/hermescontrol/ui/sessions/SessionsViewModelTest.kt

@@ -281,4 +281,84 @@ class SessionsViewModelTest {
                 .contains("Pin failed"),
         )
     }
+
+    @Test
+    fun `displaySessions filters out hidden sessions by default and shows them on toggleShowHidden`() {
+        val vm = createViewModel()
+        coEvery { mockApi.getSessions(any(), any(), any()) } returns
+            Response.success(
+                SessionListResponse(
+                    sessions =
+                        listOf(
+                            SessionInfo("s-visible-1", hidden = false),
+                            SessionInfo("s-hidden", hidden = true),
+                            SessionInfo("s-visible-2", hidden = null),
+                        ),
+                    total = 3,
+                ),
+            )
+        vm.loadSessions()
+        testDispatcher.scheduler.advanceUntilIdle()
+
+        assertTrue(vm.uiState.value.hasHiddenSessions)
+        assertFalse(vm.uiState.value.showHidden)
+        assertEquals(
+            listOf("s-visible-1", "s-visible-2"),
+            vm.uiState.value.displaySessions
+                .map { it.id },
+        )
+
+        vm.toggleShowHidden()
+        assertTrue(vm.uiState.value.showHidden)
+        assertEquals(
+            listOf("s-visible-1", "s-hidden", "s-visible-2"),
+            vm.uiState.value.displaySessions
+                .map { it.id },
+        )
+
+        vm.toggleShowHidden()
+        assertFalse(vm.uiState.value.showHidden)
+        assertEquals(
+            listOf("s-visible-1", "s-visible-2"),
+            vm.uiState.value.displaySessions
+                .map { it.id },
+        )
+    }
+
+    @Test
+    fun `toggleHide updates hidden status and surfaces toast`() {
+        val vm = createViewModel()
+        coEvery { mockApi.getSessions(any(), any(), any()) } returns
+            Response.success(
+                SessionListResponse(
+                    sessions = listOf(SessionInfo("s-1", hidden = false)),
+                    total = 1,
+                ),
+            )
+        vm.loadSessions()
+        testDispatcher.scheduler.advanceUntilIdle()
+
+        coEvery { mockApi.setSessionHidden(any(), any()) } returns Response.success(Unit)
+        vm.toggleHide("s-1")
+        testDispatcher.scheduler.advanceUntilIdle()
+
+        assertEquals(
+            true,
+            vm.uiState.value.sessions
+                .first()
+                .hidden,
+        )
+        assertEquals("Session hidden", vm.uiState.value.toastMessage)
+
+        vm.toggleHide("s-1")
+        testDispatcher.scheduler.advanceUntilIdle()
+
+        assertEquals(
+            false,
+            vm.uiState.value.sessions
+                .first()
+                .hidden,
+        )
+        assertEquals("Session unhidden", vm.uiState.value.toastMessage)
+    }
 }