Structured per-provider config block, non-destructive provider switching (#8977)

Signed-off-by: Douwe Osinga <douwe@squareup.com>
Signed-off-by: Aaron Yourk <ayourk@gmail.com>
Co-authored-by: Douwe Osinga <douwe@squareup.com>

ui/desktop/src/api/types.gen.ts

@@ -953,6 +953,7 @@ export type ProviderDetails = {
     metadata: ProviderMetadata;
     name: string;
     provider_type: ProviderType;
+    saved_model?: string | null;
 };
 
 export type ProviderEngine = 'openai' | 'ollama' | 'anthropic';