Hide sync library option when sync is disabled (#1275)

* Hide sync library option when sync is disabled

- Add isSyncEnabled parameter to LibraryToolbar and LibraryRegularToolbar
- Pass isSyncEnabled from LibraryTab to LibraryToolbar
- Conditionally display sync library action based on isSyncEnabled
- Update LibraryContent to include isSyncEnabled parameter
- Adjust LibraryTab to handle sync-related functionality
- Remove direct dependency on SyncPreferences in LibraryToolbar

* Update LibraryScreenModel to react to sync service changes

- Replace static isSyncEnabled update with dynamic observation
- Use syncPreferences.syncService().changes() to update isSyncEnabled state
- Ensure isSyncEnabled is updated whenever the sync service changes

Co-authored-by: jobobby04 <jobobby04@users.noreply.github.com>

* Fix sync service state update in LibraryScreenModel

- Resolve ambiguity in lambda parameters
- Correctly update isSyncEnabled state based on syncService value

* Optimize sync service state updates in LibraryScreenModel

- Add distinctUntilChanged() to filter out consecutive duplicate emissions
- Simplify mutableState.update lambda for better readability
- Remove redundant boolean comparison in isSyncEnabled assignment

---------

Co-authored-by: jobobby04 <jobobby04@users.noreply.github.com>

app/src/main/java/eu/kanade/presentation/library/components/LibraryToolbar.kt

@@ -41,6 +41,7 @@ fun LibraryToolbar(
     onClickSyncNow: () -> Unit,
     // SY -->
     onClickSyncExh: (() -> Unit)?,
+    isSyncEnabled: Boolean,
     // SY <--
     searchQuery: String?,
     onSearchQueryChange: (String?) -> Unit,
@@ -64,6 +65,7 @@ fun LibraryToolbar(
         onClickSyncNow = onClickSyncNow,
         // SY -->
         onClickSyncExh = onClickSyncExh,
+        isSyncEnabled = isSyncEnabled,
         // SY <--
         scrollBehavior = scrollBehavior,
     )
@@ -82,6 +84,7 @@ private fun LibraryRegularToolbar(
     onClickSyncNow: () -> Unit,
     // SY -->
     onClickSyncExh: (() -> Unit)?,
+    isSyncEnabled: Boolean,
     // SY <--
     scrollBehavior: TopAppBarScrollBehavior?,
 ) {
@@ -128,10 +131,6 @@ private fun LibraryRegularToolbar(
                         title = stringResource(MR.strings.action_open_random_manga),
                         onClick = onClickOpenRandomManga,
                     ),
-                    AppBar.OverflowAction(
-                        title = stringResource(SYMR.strings.sync_library),
-                        onClick = onClickSyncNow,
-                    ),
                 ).builder().apply {
                     // SY -->
                     if (onClickSyncExh != null) {
@@ -142,6 +141,14 @@ private fun LibraryRegularToolbar(
                             ),
                         )
                     }
+                    if (isSyncEnabled) {
+                        add(
+                            AppBar.OverflowAction(
+                                title = stringResource(SYMR.strings.sync_library),
+                                onClick = onClickSyncNow,
+                            ),
+                        )
+                    }
                     // SY <--
                 }.build(),
             )