now playing: dismiss transient UI when the notification opens it

Tapping the media notification opened now playing over whatever was on
screen, leaving the item context menu, the library options sheet, the
keyboard and any open dialog above it. On a now-playing request, clear
focus, dismiss the shared menus and close each route's dialog state.

app/src/test/kotlin/com/subtracks/ui/LibraryOptionsTest.kt

@@ -5,6 +5,7 @@ import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
+import androidx.compose.ui.test.assertCountEquals
 import androidx.compose.ui.test.junit4.v2.createAndroidComposeRule
 import androidx.compose.ui.test.onAllNodesWithTag
 import androidx.compose.ui.test.onAllNodesWithText
@@ -20,6 +21,7 @@ import com.subtracks.data.model.Artist
 import com.subtracks.data.model.Playlist
 import com.subtracks.data.prefs.ListQuery
 import com.subtracks.data.prefs.StarredFilter
+import com.subtracks.ui.components.ContextMenuHost
 import com.subtracks.ui.library.ALBUM_COVER_TAG
 import com.subtracks.ui.library.LibraryScreen
 import com.subtracks.ui.library.LibraryTab
@@ -98,6 +100,44 @@ class LibraryOptionsTest {
         assertEquals(StarredFilter.Any, query.starred)
     }
 
+    @Test
+    fun theOptionsSheetClosesWhenTransientUiIsDismissed() {
+        val host = ContextMenuHost()
+        composeRule.setContent {
+            SubtracksTheme {
+                LibraryScreen(
+                    selectedTab = LibraryTab.Albums,
+                    onTabSelected = {},
+                    albums = remember { flowOf(PagingData.from(albums())) },
+                    artists = remember { flowOf(PagingData.empty<Artist>()) },
+                    playlists = remember { flowOf(PagingData.empty<Playlist>()) },
+                    coverArt = { _, _ -> null },
+                    onAlbumClick = {},
+                    onArtistClick = {},
+                    onPlaylistClick = {},
+                    onSync = {},
+                    onOpenSettings = {},
+                    sortOptions = sortOptionsFor(LibraryTab.Albums),
+                    starredSupported = true,
+                    dismissRequests = host.dismissRequests,
+                )
+            }
+        }
+        composeRule.waitUntil(timeoutMillis = 5_000) {
+            composeRule.onAllNodesWithTag(ALBUM_COVER_TAG).fetchSemanticsNodes().isNotEmpty()
+        }
+
+        composeRule.onNodeWithContentDescription("List options").performClick()
+        composeRule.mainClock.advanceTimeBy(1_000)
+        composeRule.waitForIdle()
+        composeRule.onNodeWithText("Added").assertExists()
+
+        composeRule.runOnIdle { host.dismissTransients() }
+        composeRule.waitForIdle()
+
+        composeRule.onAllNodesWithText("Added").assertCountEquals(0)
+    }
+
     @Test
     fun playSortsAreHiddenUntilTheServerReturnsPlayData() {
         assertEquals(