[BUG] Session renew only considers forward auth

Describe the Bug

Tinyauth has a small default session timeout, but when accessing a service configured with forward auth while logged in, the session is renewed, so frequent logins aren't necessary. This behavior should apply to OIDC login as well, because right now I have to log in again every single day.

How to Reproduce

Only use Tinyauth for OIDC and try again a day later. You will be logged out.

Expected Behavior

The session should be renewed instead of expiring exactly after the default period.

Additional Context

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Operating System

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Browser

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Tinyauth Version

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Docker Version (if applicable)

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Human Written Confirmation

• I confirm this issue was written by me and not generated by an LLM or AI assistant.