feat: standardize model selectors across all providers

[hannesrudolph]

Summary

Replaces various model selection UI patterns with a consistent search-style ModelPicker component across all providers, giving users a unified experience as outlined in plans/standardize-model-selector.md.

Changes

New Files

• webview-ui/src/components/settings/utils/providerModelConfig.ts - Helper utilities including:

  • PROVIDER_SERVICE_CONFIG - Maps providers to service names/URLs
  • getDefaultModelIdForProvider(), getStaticModelsForProvider()
  • shouldUseGenericModelPicker() - Determines which providers use generic ModelPicker

• webview-ui/src/components/settings/utils/__tests__/providerModelConfig.spec.ts - 20 unit tests

Modified Files

• ModelPicker.tsx - Added new props: label, valueTransform, displayTransform, onModelChange; added new ModelIdKey types for Ollama, LMStudio, VSCodeLM
• ApiOptions.tsx - Replaced Select-based generic picker with ModelPicker using shouldUseGenericModelPicker()
• Ollama.tsx - Replaced VSCodeTextField + VSCodeRadioGroup with ModelPicker
• LMStudio.tsx - Replaced text + radio with ModelPicker; added second ModelPicker for draft model
• VSCodeLM.tsx - Replaced Select with ModelPicker using transform functions for vendor/family object
• ApiOptions.provider-filtering.spec.tsx - Added Popover/Command component mocks

Implementation Details

• Static providers (Anthropic, Bedrock, Gemini, etc.) now use ModelPicker via shouldUseGenericModelPicker()
• VSCodeLM uses valueTransform/displayTransform to handle { vendor, family } object format
• Bedrock's custom-arn option handled via getStaticModelsForProvider()
• Error messages passed to ModelPicker via errorMessage prop

Test Results

All tests pass (356 test files, 4957 tests passed, 48 skipped).

---

Important

Standardizes model selection UI with a unified ModelPicker component across all providers, enhancing consistency and user experience.

• Behavior:
  • Replaces various model selection UIs with a unified ModelPicker component across all providers.
  • Introduces shouldUseGenericModelPicker() to determine providers using the generic picker.
  • Handles custom-arn option for Bedrock in ApiOptions.tsx.
• Components:
  • ModelPicker.tsx: Added props for label, value/display transform, and model change callback.
  • ApiOptions.tsx: Replaced Select-based pickers with ModelPicker for static providers.
  • Ollama.tsx, LMStudio.tsx, VSCodeLM.tsx: Replaced existing UI with ModelPicker.
• Utilities:
  • providerModelConfig.ts: Added utilities for provider service config and model handling.
• Tests:
  • Added providerModelConfig.spec.ts with 20 unit tests for new utilities.
  • Updated ApiOptions.provider-filtering.spec.tsx to mock new components and utilities.

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[roomote]

Oroocle   See task on Roo Cloud

Re-review complete. No outstanding issues.

• Fix Z.ai default model in generic ModelPicker flow when zaiApiLine is set to China entrypoint (default link should match getProviderDefaultModelId).

Previous reviews

• 9a5e70b: Review #1

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