i18n(ja): the Generate effect category is 描画

JAPANESE_CATEGORIES had 20 of the 21 the Simplified table carries, so the Generate group in the
Effect menu drew its English name. AE calls it 描画.

Co-Authored-By: DeepSeek V4.1 Flash <noreply@deepseek.com>

crates/ui-egui/src/i18n/effects.rs

@@ -490,6 +490,7 @@ const JAPANESE_CATEGORIES: &[(&str, &str)] = &[
     ("Color Correction", "カラー補正"),
     ("Distort", "ディストーション"),
     ("Expression Controls", "式制御"),
+    ("Generate", "描画"),
     ("Immersive Video", "イマーシブビデオ"),
     ("Keying", "キーイング"),
     ("Matte", "マット"),