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/api/smtp.ts

@@ -0,0 +1,50 @@
+import client from './client'
+
+export interface SMTPConfig {
+  host: string
+  port: number
+  username: string
+  password: string
+  from_address: string
+  encryption: 'none' | 'ssl' | 'starttls'
+  configured: boolean
+}
+
+export interface SMTPConfigRequest {
+  host: string
+  port: number
+  username: string
+  password: string
+  from_address: string
+  encryption: 'none' | 'ssl' | 'starttls'
+}
+
+export interface TestEmailRequest {
+  to: string
+}
+
+export interface SMTPTestResult {
+  success: boolean
+  message?: string
+  error?: string
+}
+
+export const getSMTPConfig = async (): Promise<SMTPConfig> => {
+  const response = await client.get<SMTPConfig>('/settings/smtp')
+  return response.data
+}
+
+export const updateSMTPConfig = async (config: SMTPConfigRequest): Promise<{ message: string }> => {
+  const response = await client.post<{ message: string }>('/settings/smtp', config)
+  return response.data
+}
+
+export const testSMTPConnection = async (): Promise<SMTPTestResult> => {
+  const response = await client.post<SMTPTestResult>('/settings/smtp/test')
+  return response.data
+}
+
+export const sendTestEmail = async (request: TestEmailRequest): Promise<SMTPTestResult> => {
+  const response = await client.post<SMTPTestResult>('/settings/smtp/test-email', request)
+  return response.data
+}