清理键盘emoji内存高的问题

CustomKeyboard/View/EmojiView/KBEmojiPanelView.h

@@ -30,6 +30,9 @@ NS_ASSUME_NONNULL_BEGIN
 /// 高亮指定分类
 - (void)selectCategoryAtIndex:(NSInteger)index;
 
+/// 释放 emoji 数据缓存（隐藏面板时可用）
+- (void)purgeEmojiCache;
+
 @end
 
 NS_ASSUME_NONNULL_END

CustomKeyboard/View/EmojiView/KBEmojiPanelView.m

@@ -185,6 +185,15 @@
     [self updateSelectionToIndex:preserved];
 }
 
+- (void)purgeEmojiCache {
+    [self.dataProvider purgeLargeCaches];
+    self.categories = @[];
+    self.currentIndex = NSNotFound;
+    self.titleLabel.text = @"";
+    [self rebuildTabButtons];
+    [self.collectionView reloadData];
+}
+
 - (void)rebuildTabButtons {
     UIStackView *stackView = self.bottomBar.tabStackView;
     if (!stackView) { return; }