fix: address code review findings

internal/normalize/normalize_test.go

@@ -48,8 +48,17 @@ func TestNormalizeString_Basic(t *testing.T) {
 		// the bare year (it falsely matched "1989" before). It collapses to empty.
 		{"1989 [2020]", ""},
 		{"1989 2020", ""},
-		{"3000 2000", "3000"},
+		// Both tokens are years → both stripped → empty (no album words remain).
+		{"3000 2000", ""},
 		{"1989 RMX", "rmx"},
+		// Regression: year regex must cover ALL 4-digit years, not just 1000-2999.
+		// A reissue of a year-titled album outside that range must still collapse
+		// to empty so it is correctly reported as missing and does NOT falsely
+		// match a bare year-titled local album.
+		{"3000", "3000"},
+		{"3000 (Remastered)", ""},
+		{"3010 [Deluxe Edition]", ""},
+		{"4000 (Remastered)", ""},
 	}
 
 	for _, tt := range tests {