Fix code scanning alert

[iFargle]

Tracking issue for:

• [x] https://github.com/iFargle/headscale-webui/security/code-scanning/2
• [x] https://github.com/iFargle/headscale-webui/security/code-scanning/3
• [x] https://github.com/iFargle/headscale-webui/security/code-scanning/4
• [x] https://github.com/iFargle/headscale-webui/security/code-scanning/5
• [x] https://github.com/iFargle/headscale-webui/security/code-scanning/6
• [x] https://github.com/iFargle/headscale-webui/security/code-scanning/7
• [x] https://github.com/iFargle/headscale-webui/security/code-scanning/8
• [x] https://github.com/iFargle/headscale-webui/security/code-scanning/9
• [x] https://github.com/iFargle/headscale-webui/security/code-scanning/10
• [x] https://github.com/iFargle/headscale-webui/security/code-scanning/11
• [x] https://github.com/iFargle/headscale-webui/security/code-scanning/12
• [x] https://github.com/iFargle/headscale-webui/security/code-scanning/13
• [x] https://github.com/iFargle/headscale-webui/security/code-scanning/14
• [x] https://github.com/iFargle/headscale-webui/security/code-scanning/15
• [x] https://github.com/iFargle/headscale-webui/security/code-scanning/16