fix(app): suppress angle bracket-wrapped coded links (#40)

fluxer_app/src/utils/linkSuppressionUtils.ts

@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2026 Fluxer Contributors
+ *
+ * This file is part of Fluxer.
+ *
+ * Fluxer is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Fluxer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+export function isLinkWrappedInAngleBrackets(
+	content: string,
+	matchStart: number,
+	matchLength: number,
+): boolean {
+	if (matchLength <= 0) return false;
+
+	const beforeIndex = matchStart - 1;
+	const afterIndex = matchStart + matchLength;
+
+	if (beforeIndex < 0 || afterIndex >= content.length) {
+		return false;
+	}
+
+	return content[beforeIndex] === '<' && content[afterIndex] === '>';
+}