fix: enable multi-select actions in local comics search mode

lib/pages/local_comics_page.dart

@@ -258,19 +258,30 @@ class _LocalComicsPageState extends State<LocalComicsPage> {
           else if (searchMode)
             SliverAppbar(
               leading: Tooltip(
-                message: "Cancel".tl,
+                message: multiSelectMode ? "Cancel".tl : "Cancel".tl,
                 child: IconButton(
-                  icon: const Icon(Icons.close),
+                  icon: multiSelectMode
+                      ? const Icon(Icons.close)
+                      : const Icon(Icons.close),
                   onPressed: () {
+                    if (multiSelectMode) {
+                      setState(() {
+                        multiSelectMode = false;
+                        selectedComics.clear();
+                      });
+                    } else {
                       setState(() {
                         searchMode = false;
                         keyword = "";
                         update();
                       });
+                    }
                   },
                 ),
               ),
-              title: TextField(
+              title: multiSelectMode
+                  ? Text(selectedComics.length.toString())
+                  : TextField(
                       autofocus: true,
                       decoration: InputDecoration(
                         hintText: "Search".tl,
@@ -281,6 +292,7 @@ class _LocalComicsPageState extends State<LocalComicsPage> {
                         update();
                       },
                     ),
+              actions: multiSelectMode ? selectActions : null,
             ),
           SliverGridComics(
             comics: comics,
@@ -344,6 +356,7 @@ class _LocalComicsPageState extends State<LocalComicsPage> {
     return PopScope(
       canPop: !multiSelectMode && !searchMode,
       onPopInvokedWithResult: (didPop, result) {
+        if (didPop) return;
         if (multiSelectMode) {
           setState(() {
             multiSelectMode = false;