improve ui

lib/components/comic.dart

@@ -454,7 +454,9 @@ class _ComicDescription extends StatelessWidget {
                 ),
               ).toAlign(Alignment.topCenter);
             }),
-          ),
+          )
+        else
+          const Spacer(),
         Row(
           crossAxisAlignment: CrossAxisAlignment.end,
           children: [

lib/foundation/comic_source/comic_source.dart

@@ -12,6 +12,7 @@ import 'package:venera/foundation/history.dart';
 import 'package:venera/foundation/res.dart';
 import 'package:venera/utils/ext.dart';
 import 'package:venera/utils/io.dart';
+import 'package:venera/utils/translations.dart';
 
 import '../js_engine.dart';
 import '../log.dart';

lib/foundation/comic_source/parser.dart

@@ -106,7 +106,9 @@ class ComicSourceParser {
     if (minAppVersion != null) {
       if (compareSemVer(minAppVersion, App.version.split('-').first)) {
         throw ComicSourceParseException(
-            "minAppVersion $minAppVersion is required");
+          "minAppVersion @version is required"
+              .tlParams({"version": minAppVersion}),
+        );
       }
     }
     for (var source in ComicSource.all()) {
@@ -728,7 +730,7 @@ class ComicSourceParser {
 
         return retryZone(func);
       };
-      if(_checkExists("favorites.addFolder")) {
+      if (_checkExists("favorites.addFolder")) {
         addFolder = (name) async {
           try {
             await JsEngine().runCode("""
@@ -741,7 +743,7 @@ class ComicSourceParser {
           }
         };
       }
-      if(_checkExists("favorites.deleteFolder")) {
+      if (_checkExists("favorites.deleteFolder")) {
         deleteFolder = (key) async {
           try {
             await JsEngine().runCode("""

lib/pages/comic_page.dart

@@ -1574,7 +1574,7 @@ class _SelectDownloadChapterState extends State<_SelectDownloadChapter> {
                 const SizedBox(width: 16),
                 Expanded(
                   child: FilledButton(
-                    onPressed: () {
+                    onPressed: selected.isEmpty ? null : () {
                       widget.finishSelect(selected);
                       context.pop();
                     },
@@ -1585,7 +1585,7 @@ class _SelectDownloadChapterState extends State<_SelectDownloadChapter> {
               ],
             ),
           ),
-          SizedBox(height: MediaQuery.of(context).padding.bottom + 4),
+          SizedBox(height: MediaQuery.of(context).padding.bottom),
         ],
       ),
     );

lib/pages/comic_source_page.dart

@@ -451,10 +451,11 @@ class _ComicSourceListState extends State<_ComicSourceList> {
         itemBuilder: (context, index) {
           var key = json![index]["key"];
           var action = currentKey.contains(key)
-              ? const Icon(Icons.check)
+              ? const Icon(Icons.check, size: 22).paddingRight(8)
               : Tooltip(
                   message: "Add",
                   child: IconButton(
+                    color: context.colorScheme.primary,
                     icon: const Icon(Icons.add),
                     onPressed: () async {
                       await widget.onAdd(