fix: enable native tool calls for Requesty provider (ROO-235)

- Add supportsNativeTools and defaultToolProtocol to Requesty model fetcher
- Merge native tool defaults in RequestyHandler.getModel() for cached models
- Apply same defaults merge in useSelectedModel for UI consistency
- Also applied to Unbound provider for consistency

The issue was that cached model data lacked the supportsNativeTools field,
causing resolveToolProtocol() to return XML instead of native protocol.

Author: daniel-lxs

src/api/providers/fetchers/requesty.ts

@@ -38,6 +38,8 @@ export async function getRequestyModels(baseUrl?: string, apiKey?: string): Prom
 				supportsImages: rawModel.supports_vision,
 				supportsReasoningBudget: reasoningBudget,
 				supportsReasoningEffort: reasoningEffort,
+				supportsNativeTools: true,
+				defaultToolProtocol: "native",
 				inputPrice: parseApiPrice(rawModel.input_price),
 				outputPrice: parseApiPrice(rawModel.output_price),
 				description: rawModel.description,

src/api/providers/requesty.ts

@@ -79,7 +79,15 @@ export class RequestyHandler extends BaseProvider implements SingleCompletionHan
 
 	override getModel() {
 		const id = this.options.requestyModelId ?? requestyDefaultModelId
-		let info = this.models[id] ?? requestyDefaultModelInfo
+		const cachedInfo = this.models[id] ?? requestyDefaultModelInfo
+
+		// Merge native tool defaults for cached models that may lack these fields
+		// The order ensures that cached values (if present) override the defaults
+		let info: ModelInfo = {
+			supportsNativeTools: true,
+			defaultToolProtocol: TOOL_PROTOCOL.NATIVE,
+			...cachedInfo,
+		}
 
 		// Apply tool preferences for models accessed through routers (OpenAI, Gemini)
 		info = applyRouterToolPreferences(id, info)

webview-ui/src/components/ui/hooks/useSelectedModel.ts

@@ -157,12 +157,24 @@ function getSelectedModel({
 		}
 		case "requesty": {
 			const id = getValidatedModelId(apiConfiguration.requestyModelId, routerModels.requesty, defaultModelId)
-			const info = routerModels.requesty?.[id]
+			const routerInfo = routerModels.requesty?.[id]
+			// Merge native tool call defaults for cached models that may lack these fields
+			const nativeToolDefaults = {
+				supportsNativeTools: true,
+				defaultToolProtocol: "native" as const,
+			}
+			const info = routerInfo ? { ...nativeToolDefaults, ...routerInfo } : undefined
 			return { id, info }
 		}
 		case "unbound": {
 			const id = getValidatedModelId(apiConfiguration.unboundModelId, routerModels.unbound, defaultModelId)
-			const info = routerModels.unbound?.[id]
+			const routerInfo = routerModels.unbound?.[id]
+			// Merge native tool call defaults for cached models that may lack these fields
+			const nativeToolDefaults = {
+				supportsNativeTools: true,
+				defaultToolProtocol: "native" as const,
+			}
+			const info = routerInfo ? { ...nativeToolDefaults, ...routerInfo } : undefined
 			return { id, info }
 		}
 		case "litellm": {