fix: remove non-existent gemini-25-pro model check

- Remove gemini-25-pro check from model-params.ts
- Remove gemini-25-pro check from ThinkingBudget.tsx
- Remove test case for gemini-25-pro alternative naming

The gemini-25-pro model identifier does not exist. Only gemini-2.5-pro is valid.

Author: roomote

src/api/transform/model-params.ts

@@ -92,7 +92,7 @@ export function getModelParams({
 
 	if (shouldUseReasoningBudget({ model, settings })) {
 		// Check if this is a Gemini 2.5 Pro model
-		const isGemini25Pro = modelId.includes("gemini-2.5-pro") || modelId.includes("gemini-25-pro")
+		const isGemini25Pro = modelId.includes("gemini-2.5-pro")
 
 		// If `customMaxThinkingTokens` is not specified use the default.
 		// For Gemini 2.5 Pro, default to 128 instead of 8192

webview-ui/src/components/settings/ThinkingBudget.tsx

@@ -24,8 +24,7 @@ export const ThinkingBudget = ({ apiConfiguration, setApiConfigurationField, mod
 	const { id: selectedModelId } = useSelectedModel(apiConfiguration)
 
 	// Check if this is a Gemini 2.5 Pro model
-	const isGemini25Pro =
-		selectedModelId && (selectedModelId.includes("gemini-2.5-pro") || selectedModelId.includes("gemini-25-pro"))
+	const isGemini25Pro = selectedModelId && selectedModelId.includes("gemini-2.5-pro")
 	const minThinkingTokens = isGemini25Pro ? GEMINI_25_PRO_MIN_THINKING_TOKENS : 1024
 
 	const isReasoningBudgetSupported = !!modelInfo && modelInfo.supportsReasoningBudget

webview-ui/src/components/settings/__tests__/ThinkingBudget.spec.tsx

@@ -146,22 +146,6 @@ describe("ThinkingBudget", () => {
 		expect(sliders[1].getAttribute("min")).toBe("128")
 	})
 
-	it("should use min thinking tokens of 128 for Gemini 25 Pro models (alternative naming)", () => {
-		render(
-			<ThinkingBudget
-				{...defaultProps}
-				apiConfiguration={{
-					modelMaxTokens: 10000,
-					apiProvider: "gemini",
-					apiModelId: "gemini-25-pro-latest",
-				}}
-			/>,
-		)
-
-		const sliders = screen.getAllByTestId("slider")
-		expect(sliders[1].getAttribute("min")).toBe("128")
-	})
-
 	it("should use step of 128 for Gemini 2.5 Pro models", () => {
 		render(
 			<ThinkingBudget