Summary

• Decode gateway-provided thinking metadata in shared native chat session/default models.
• Render the iOS/macOS thinking picker from session/default thinkingLevels metadata instead of hard-coded base levels.
• Preserve legacy/current thinking values such as adaptive, xhigh, and max without leaking default-model options into different active session models.

Verification

• swift test --package-path apps/shared/OpenClawKit --filter ChatViewModelTests --no-parallel
• swift test --package-path apps/macos --filter WebChatSwiftUISmokeTests --no-parallel
• pnpm lint:swift
• pnpm check:changed locally
• Testbox pnpm check:changed narrowed to apps, docs but the box image is missing swiftlint, so it failed before app lint ran; local SwiftLint passed.

Notes

• Follow-up maintainer fix for fix(ios): picker adaptive onChange loop + OSLog string concatenation #40878 review feedback; this keeps the metadata decoding and picker rendering separate from the adaptive-loop cleanup in the contributor PR.