feat: Improve CJK character width calculation, enhance SQLite vacuum test robustness, and update security audit documentation for core cleaning and optimization logic.

cmd/analyze/format.go

@@ -146,6 +146,8 @@ func coloredProgressBar(value, max int64, percent float64) string {
 func runeWidth(r rune) int {
 	if r >= 0x4E00 && r <= 0x9FFF ||
 		r >= 0x3400 && r <= 0x4DBF ||
+		r >= 0x3040 && r <= 0x30FF ||
+		r >= 0x31F0 && r <= 0x31FF ||
 		r >= 0xAC00 && r <= 0xD7AF ||
 		r >= 0xFF00 && r <= 0xFFEF {
 		return 2

cmd/analyze/format_test.go

@@ -14,7 +14,7 @@ func TestRuneWidth(t *testing.T) {
 		{"ASCII letter", 'a', 1},
 		{"ASCII digit", '5', 1},
 		{"Chinese character", '中', 2},
-		{"Japanese hiragana", 'あ', 1}, // BUG: Should be 2, but current implementation returns 1
+		{"Japanese hiragana", 'あ', 2},
 		{"Korean hangul", '한', 2},
 		{"CJK ideograph", '語', 2},
 		{"Full-width number", '１', 2},