fix: harden cookie-less sso token redirects

[superdav42]

Summary

• Moves cookie-less SSO token consumption into Ultimate Multisite on init so mapped subsites can authenticate from wu_sso_token without the multi-tenancy cookie flow.
• Preserves cross-domain redirect_to admin URLs, supports custom /login/ pages through template_redirect, and binds tokens to an audience host plus one-time jti transient.

Testing

• php -l inc/sso/class-sso.php
• vendor/bin/phpstan analyse inc/sso/class-sso.php --memory-limit=1G
• vendor/bin/phpcs inc/sso/class-sso.php (blocked: configured WordPress.Arrays.ArrayDeclaration.* sniffs are unavailable after composer install)

For #1086

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aidevops.sh v3.14.51 plugin for OpenCode v1.14.33 with gpt-5.5 spent 3m and 80,442 tokens on this as a headless worker.

[coderabbitai]

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ℹ️ Review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro

Run ID: 20e8f7df-0409-45b3-9736-9fab7280527f

📥 Commits

Reviewing files that changed from the base of the PR and between 1d8472e and 893a22e.

📒 Files selected for processing (1)

• inc/sso/class-sso.php

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feature/auto-20260504-150241-gh1086

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[superdav42]

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aidevops.sh v3.14.51 plugin for OpenCode v1.14.33 with gpt-5.5 spent 3m and 83,021 tokens on this as a headless worker.

[superdav42]

DISPATCH_CLAIM nonce=700f929a63bd5219af701a52427218bc runner=superdav42 ts=2026-05-04T21:06:48Z max_age_s=1800 version=3.14.51 opencode_version=1.14.33

[superdav42]

Dispatching worker (deterministic).

• Worker PID: 1160029
• Model: openai/gpt-5.5
• Tier: standard
• Runner: superdav42
• aidevops: v3.14.51
• OpenCode: v1.14.33
• Issue: fix: harden cookie-less sso token redirects #1087

[github-actions]

🔨 Build Complete - Ready for Testing!

📦 Download Build Artifact (Recommended)

Download the zip build, upload to WordPress and test:

• Build: ultimate-multisite
• ⬇️ Download from GitHub Actions
• ⬇️ Download without Github Account (nightly.link)

🌐 Test in WordPress Playground (Very Experimental)

Click the link below to instantly test this PR in your browser - no installation needed!
Playground support for multisite is very limitied, hopefully it will get better in the future.

🚀 Launch in Playground

Login credentials: admin / password

[superdav42]

CLAIM_RELEASED reason=clean runner=dave ts=2026-05-04T21:10:18Z aidevops_version=3.14.51 opencode_version=1.14.33 exit=0 session_count=1

[github-actions]

Performance Test Results

Performance test results for 1651e6f are in 🛎️!

Note: the numbers in parentheses show the difference to the previous (baseline) test run. Differences below 2% or 0.5 in absolute values are not shown.

URL: /

Run	DB Queries	Memory	Before Template	Template	WP Total	LCP	TTFB	LCP - TTFB
0	40 (-1 / -3% )	37.78 MB	833.50 ms (-22.00 ms / -3% )	151.50 ms (-19.00 ms / -13% )	1075.50 ms	1992.00 ms	1907.30 ms	87.95 ms (-2.00 ms / -2% )
1	56	49.10 MB	885.50 ms (-60.50 ms / -7% )	145.50 ms (-3.00 ms / -2% )	1031.50 ms (-63.50 ms / -6% )	2002.00 ms (-80.00 ms / -4% )	1914.40 ms (-84.90 ms / -4% )	82.65 ms