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/hooks/__tests__/useTheme.test.tsx

@@ -0,0 +1,17 @@
+import { describe, it, expect } from 'vitest'
+import { renderHook } from '@testing-library/react'
+import { useTheme } from '../useTheme'
+
+describe('useTheme', () => {
+  it('throws error when used outside ThemeProvider', () => {
+    // Suppress console.error for this test as React logs the error
+    const consoleSpy = vi.spyOn(console, 'error')
+    consoleSpy.mockImplementation(() => {})
+
+    expect(() => {
+      renderHook(() => useTheme())
+    }).toThrow('useTheme must be used within a ThemeProvider')
+
+    consoleSpy.mockRestore()
+  })
+})