Fix secure cookie configuration

[TooAngel]

Configure cookies to be set as secure in production environment.

Context:

• Cookies are currently not set to secure
• Production environment uses HTTPS with 2-level proxy setup
• Session security requires secure cookie configuration

Acceptance Criteria:

• Configure session cookies with secure flag
• Test cookie behavior with 2-level proxy setup
• Verify session persistence works correctly
• Ensure proper cookie configuration for HTTPS
• Update proxy trust settings if needed

Priority: Medium