Summary

Adds Sendable conformance to all structs generated by protocol-gen-swift.ts.

Problem

Swift 6's strict concurrency checking requires types passed across actor boundaries to conform to Sendable. The generated GatewayModels.swift structs are used in async contexts (e.g., OnboardingWizard.swift) but don't conform to Sendable, causing build failures:

error: non-Sendable 'WizardStartResult'-typed result can not be returned from actor-isolated instance method

Solution

One-line change to the generator:

-  lines.push(\`public struct \${name}: Codable {\`);
+  lines.push(\`public struct \${name}: Codable, Sendable {\`);

All generated structs only contain value types (strings, ints, optionals, arrays of Codable), so they're safe to be Sendable.

Testing

• Tested locally - macOS app builds successfully with this fix
• Ran pnpm lint - no errors
• Verified generated GatewayModels.swift includes Sendable conformance

AI Disclosure 🤖

• AI-assisted (Claude)
• Fully tested locally
• I understand what the code does

This fix was discovered while setting up clawdbot on a fresh machine and attempting to build the macOS app from source.