chore: refactor tests to improve clarity and reliability

- Removed unnecessary test.skip() calls in various test files, replacing them with comments for clarity.
- Enhanced retry logic in TestDataManager for API requests to handle rate limiting more gracefully.
- Updated security helper functions to include retry mechanisms for fetching security status and setting module states.
- Improved loading completion checks to handle page closure scenarios.
- Adjusted WebKit-specific tests to run in all browsers, removing the previous skip logic.
- General cleanup and refactoring across multiple test files to enhance readability and maintainability.

frontend/src/test/setup.ts

@@ -96,6 +96,27 @@ if (!Element.prototype.scrollIntoView) {
   Element.prototype.scrollIntoView = function() {}
 }
 
+// Prevent jsdom navigation errors for anchor clicks during tests
+const anchorPrototype = HTMLAnchorElement.prototype as unknown as {
+  __testNoNavClick?: boolean
+  __originalClick?: typeof HTMLAnchorElement.prototype.click
+}
+
+if (!anchorPrototype.__testNoNavClick) {
+  const originalClick = HTMLAnchorElement.prototype.click
+  Object.defineProperty(HTMLAnchorElement.prototype, '__testNoNavClick', {
+    value: true,
+    configurable: false,
+    writable: false,
+  })
+  HTMLAnchorElement.prototype.click = function() {
+    const event = new MouseEvent('click', { bubbles: true, cancelable: true })
+    this.dispatchEvent(event)
+    return undefined
+  }
+  anchorPrototype.__originalClick = originalClick
+}
+
 // Filter noisy React act environment warnings that can appear in some environments
 const _origConsoleError = console.error
 console.error = (...args: unknown[]) => {