fix(webui): add missing characters for Japanese series grouping

Closes: #1959

Author: k11o

komga-webui/src/types/komga-clientsettings.ts

@@ -92,6 +92,11 @@ export const SERIES_GROUP_JAPANESE = {
     'つ': ['つ', 'づ', 'ツ', 'ズ'],
     'て': ['て', 'で', 'テ', 'デ'],
     'と': ['と', 'ど', 'ト', 'ド'],
+    'な': ['な', 'ナ'],
+    'に': ['に', 'ニ'],
+    'ぬ': ['ぬ', 'ヌ'],
+    'ね': ['ね', 'ネ'],
+    'の': ['の', 'ノ'],
     'は': ['は', 'ば', 'ぱ', 'ハ', 'バ', 'パ'],
     'ひ': ['ひ', 'び', 'ぴ', 'ヒ', 'ビ', 'ピ'],
     'ふ': ['ふ', 'ぶ', 'ぷ', 'フ', 'ブ', 'プ'],
@@ -111,6 +116,8 @@ export const SERIES_GROUP_JAPANESE = {
     'れ': ['れ', 'レ'],
     'ろ': ['ろ', 'ロ'],
     'わ': ['わ', 'ワ'],
+    'を': ['を', 'ヲ'],
+    'ん': ['ん', 'ン'],
   },
 } as ClientSettingsSeriesGroup