Add QA test outputs, build scripts, and Dockerfile validation

- Created `qa-test-output-after-fix.txt` and `qa-test-output.txt` to log results of certificate page authentication tests.
- Added `build.sh` for deterministic backend builds in CI, utilizing `go list` for efficiency.
- Introduced `codeql_scan.sh` for CodeQL database creation and analysis for Go and JavaScript/TypeScript.
- Implemented `dockerfile_check.sh` to validate Dockerfiles for base image and package manager mismatches.
- Added `sourcery_precommit_wrapper.sh` to facilitate Sourcery CLI usage in pre-commit hooks.

frontend/src/test/setup.ts

@@ -0,0 +1,49 @@
+// Ensure React's act environment flag is set for React 18+ to avoid warnings
+// This must be set before importing testing utilities.
+// See: https://github.com/facebook/react/issues/24560#issuecomment-1021997243
+declare global { var IS_REACT_ACT_ENVIRONMENT: boolean | undefined }
+globalThis.IS_REACT_ACT_ENVIRONMENT = true
+
+import '@testing-library/jest-dom'
+import { cleanup } from '@testing-library/react'
+import { afterEach } from 'vitest'
+
+// Cleanup after each test
+afterEach(() => {
+  cleanup()
+})
+
+// Mock window.matchMedia
+Object.defineProperty(window, 'matchMedia', {
+  writable: true,
+  value: (query: string) => ({
+    matches: false,
+    media: query,
+    onchange: null,
+    addListener: () => {},
+    removeListener: () => {},
+    addEventListener: () => {},
+    removeEventListener: () => {},
+    dispatchEvent: () => {},
+  }),
+})
+
+// Filter noisy React act environment warnings that can appear in some environments
+const _origConsoleError = console.error
+console.error = (...args: unknown[]) => {
+  try {
+    const msg = args[0]
+    if (typeof msg === 'string') {
+      if (
+        msg.includes("The current testing environment is not configured to support act(") ||
+        msg.includes('Test connection failed') ||
+        msg.includes('Connection failed')
+      ) {
+        return
+      }
+    }
+  } catch {
+    // fallthrough to original
+  }
+  _origConsoleError.apply(console, args)
+}