Code Review: Full Codebase Security & Quality Audit

[Pahuut420]

@copilot Review this entire codebase and create a PR that addresses:

1. Security: Hardcoded secrets, injection vulnerabilities, missing auth, OWASP Top 10
2. Dependencies: Broken/outdated deps, vulnerable packages
3. Code Quality: Type errors, missing error handling, dead code
4. Build: Ensure the project builds and runs correctly

Focus on critical fixes only. Do not refactor working code.