fix(session): support IPv6 loopback broker URLs

[benvinegar]

Summary

• format literal IPv6 session-broker hosts as bracketed URL authorities
• cover IPv6 HTTP and WebSocket origin generation
• add a patch changeset

Verification

• bun test src/session-broker/brokerConfig.test.ts
• bun run typecheck
• bun run lint

This PR description was generated by Pi using GPT-5.2

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Project	Deployment	Actions	Updated (UTC)
hunk-web	Building	Preview	Jul 28, 2026 3:07am

[greptile-apps]

Greptile Summary

This PR fixes session-broker URL generation for literal IPv6 hosts.

• Brackets IPv6 literals when constructing HTTP and WebSocket URL authorities while preserving the raw socket host.
• Adds regression coverage for IPv6 loopback origins.
• Adds a patch changeset for hunkdiff.

Confidence Score: 5/5

The PR appears safe to merge with no actionable defects identified.

The changed origin formatting produces valid bracketed IPv6 authorities while retaining the unbracketed host required by socket APIs, and existing authority validation accepts the resulting form.

Important Files Changed

Filename	Overview
src/session-broker/brokerConfig.ts	Correctly distinguishes socket host syntax from bracketed IPv6 URL-authority syntax.
src/session-broker/brokerConfig.test.ts	Adds focused regression coverage for HTTP and WebSocket origins generated from ::1.
.changeset/fix-ipv6-session-broker-origins.md	Records the IPv6 loopback fix as a patch release.

_{Reviews (1): Last reviewed commit: "fix(session): support IPv6 loopback brok..." | Re-trigger Greptile}