Av/693 streamline login logout

[anushkavidanage]

Pull Request Details

Description

• Add prewarmSolidAuthenticate(): builds a SolidAuthManager, calls its new prewarm(), and caches it; solidAuthenticate() reuses that cached manager when serverId/clientId/redirectUri/oidcOptions all match, then clears the cache either way.
• solidAuthenticate() gains an optional oidcOptions passthrough to SolidOidcConfig (defaults to null, no behaviour change) for callers who want to set package:oidc platform options directly.
• Add oidc as a direct dependency (was already resolved transitively via solid_auth).

Why

Companion to the solid_auth PR: anusii/solid_auth#50 closes the gap where Safari/Brave silently blocks the login popup because window.open() fires after solidAuthenticate()'s WebID/issuer-discovery network round trips instead of synchronously with the click.

Related Issues

#693

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How To Test?

Run the example app in corresponding branches of solidui with different Browser and OS combinations. See PR anusii/solidui#402 for more details.

Checklist

• Screenshots included here/in linked issue #
• Changes adhere to the style and coding guidelines
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• Any dependent changes have been merged and published in downstream modules
• The update contains no confidential information
• The update has no duplicated content
• No lint check errors are related to these changes (make prep or flutter analyze lib)
• Integration test dart test output or screenshot included in issue #
• I tested the PR on these devices:
  • Android
  • iOS
  • Linux
  • MacOS
  • Windows
  • Web
• I have identified reviewers
• The PR has been approved by reviewers

Finalising

• Merge dev into the this branch
• Resolve any conflicts
• Add a one line summary into the CHANGELOG.md
• Push to the git repository and review
• Merge the PR into dev