[Angnuo (angnuoli)]

Summary

• Fix An object could not be cloned when loading cloud model catalogs from model settings.
• Construct a plain ProviderCatalogInput request containing only baseUrl and apiKey at the shared catalog API boundary instead of passing a Vue reactive Proxy to Electron.
• Keep provider APIs, caching, credentials storage, and sandbox policy unchanged.

Regression coverage

• Exercise both load and loadConfigured with deeply reactive provider configuration and real structuredClone validation at the mocked IPC boundary.
• Require cloneable requests in the settings integration test before checking the full live catalog and hot-selecting an unsaved model.
• The three focused regression cases reproduced the failure before the fix and pass afterward.

Validation

Validated in a clean worktree based on current main, excluding unrelated local feature changes:

• Full renderer suite: 42 test files / 549 tests passed (vitest run --silent).
• Vue/TypeScript: vue-tsc --noEmit --pretty false passed.
• ESLint on the three changed files: zero errors; 16 pre-existing test-stub warnings.
• Prettier on the three changed files passed.
• git diff --check passed.

Scope: three files only; no packaging or installation changes.