fix: spurious unsaved-changes warning when navigating between test cases in a test run (#406)

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: kimatata <117462761+kimatata@users.noreply.github.com>

frontend/utils/formGuard.ts

@@ -1,7 +1,19 @@
 import { useEffect } from 'react';
 
-export const useFormGuard = (isDirty: boolean, confirmText: string, ignorePaths?: string[]) => {
+const isIgnoredPath = (href: string, compiledPatterns: RegExp[]): boolean => {
+  return compiledPatterns.some((regex) => regex.test(href));
+};
+
+export const useFormGuard = (isDirty: boolean, confirmText: string, ignorePathPatterns?: string[]) => {
   useEffect(() => {
+    const compiledPatterns: RegExp[] = (ignorePathPatterns ?? []).flatMap((pattern) => {
+      try {
+        return [new RegExp(pattern)];
+      } catch {
+        return [];
+      }
+    });
+
     const handleClick = (event: MouseEvent) => {
       if (!isDirty) return;
 
@@ -13,7 +25,7 @@ export const useFormGuard = (isDirty: boolean, confirmText: string, ignorePaths?
         if (!href) return;
 
         // do not show confirm for ignored paths
-        if (ignorePaths && ignorePaths.some((path) => href.includes(path))) {
+        if (isIgnoredPath(href, compiledPatterns)) {
           return;
         }
 
@@ -38,5 +50,5 @@ export const useFormGuard = (isDirty: boolean, confirmText: string, ignorePaths?
       window.removeEventListener('beforeunload', handleBeforeUnload);
       window.removeEventListener('click', handleClick, true);
     };
-  }, [confirmText, isDirty, ignorePaths]);
+  }, [confirmText, isDirty, ignorePathPatterns]);
 };