Poracode Nightly v1.7.1-nightly.202609031649

What's Changed

• Treat settings-owned MCP as guaranteeing read_thread on handoff by @SDSLeon in #680
• Overflow right-panel header controls and move dock chrome there by @SDSLeon in #681
• Add Muse MSP protocol, catalog discovery, and request handling by @SDSLeon in #682
• feat(thread): add thread image gallery dock and lightbox by @SDSLeon in #683
• fix(opencode): map current SDK capabilities by @SDSLeon in #684

Full Changelog: v1.7.1-nightly.202609022057...v1.7.1-nightly.202609031649