URLCode 0.6.4

What's Changed

• feat(core): studio opens the browser; review report shows changed files, a verdict, route marks and findings by @jimhoyd in #792
• fix(examples): packaged examples' tests.commands run from a consumer copy (#789) by @jimhoyd in #794
• Streaming responses for extensions and trusted functions, and the opt-in MCP streaming transport (#659, #626) by @jimhoyd in #796
• Reload hand-off for exclusive extension resources so stateful sites hot-reload; contact-form signal docs and example version alignment (#777, #793, #795) by @jimhoyd in #798
• fix(core): context and plan-feature forward --origin; emitted commands quote and locate the project (#791, #790) by @jimhoyd in #797
• release: v0.6.4 by @jimhoyd in #799
• Fix Windows cleanup of the stateful reload test by @jimhoyd in #800

Full Changelog: v0.6.3...v0.6.4