fix: use replaceAll in processTemplate to prevent ReDoS vulnerabilities

Author: LonoxX

src/util/templateUtils.ts

@@ -350,9 +350,9 @@ export function processTemplate(
 		replacements["{parent_issue_state}"] = "";
 	}
 
-	// Replace all variables
+	// Replace all variables (using replaceAll to avoid ReDoS vulnerabilities)
 	for (const [placeholder, value] of Object.entries(replacements)) {
-		result = result.replace(new RegExp(escapeRegExp(placeholder), "g"), value);
+		result = result.replaceAll(placeholder, value);
 	}
 
 	// Process dynamic project field access: {project_field:FieldName}

tsconfig.json

@@ -11,7 +11,7 @@
 		"importHelpers": true,
 		"isolatedModules": true,
 		"strictNullChecks": true,
-		"lib": ["DOM", "ES5", "ES6", "ES7"]
+		"lib": ["DOM", "ES5", "ES6", "ES7", "ES2021"]
 	},
 	"include": ["**/*.ts"]
 }