fix(backend): support Authorization Bearer tokens in optionalAuthenticateUser (fix #137)

[Pratyush-Panda-2006]

Description

This pull request ensures that the optionalAuthenticateUser middleware extracts JWT tokens from the standard Authorization: Bearer <token> header in addition to cookies, matching the extraction logic implemented in standard authentication middleware (authenticateUser). Previously, clients authenticating via headers were unrecognized during optional auth checks, causing the rate limiter to fall back to IP-based limits.

Changes

• Updated the optionalAuthenticateUser middleware inside backend/src/server.js to look for Bearer tokens in the request's Authorization header when a token cookie is absent.

Fixes #137

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📥 Commits

Reviewing files that changed from the base of the PR and between a3fcb95 and aaba9c7.

📒 Files selected for processing (2)

• backend/src/server.js
• github_issues.md

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