feat(site): populate Model name from Known Model display name (#25862)

site/src/pages/AgentsPage/components/ChatModelAdminPanel/knownModels/applyKnownModelDefaults.test.ts

@@ -106,6 +106,35 @@ describe("applyKnownModelDefaults", () => {
 		expect(result.appliedFields).toEqual([]);
 	});
 
+	it("populates display name with the Known Model display name", () => {
+		const result = applyDefaults({
+			values: buildInitialModelFormValues(),
+			initialValues: buildInitialModelFormValues(),
+			provider: "anthropic",
+			knownModel: requireKnownModel("anthropic", "claude-opus-4-8"),
+		});
+
+		expect(result.values.displayName).toBe("Claude Opus 4.8");
+		expect(result.appliedFields).toContain("displayName");
+	});
+
+	it("skips display name when current value differs from initial value", () => {
+		const values = setPath(
+			buildInitialModelFormValues(),
+			"displayName",
+			"My Custom Name",
+		);
+		const result = applyDefaults({
+			values,
+			initialValues: buildInitialModelFormValues(),
+			provider: "anthropic",
+			knownModel: requireKnownModel("anthropic", "claude-opus-4-8"),
+		});
+
+		expect(result.values.displayName).toBe("My Custom Name");
+		expect(result.appliedFields).not.toContain("displayName");
+	});
+
 	it("populates context limit when current value still equals initial value", () => {
 		const result = applyDefaults({
 			values: buildInitialModelFormValues(),

site/src/pages/AgentsPage/components/ChatModelAdminPanel/knownModels/applyKnownModelDefaults.ts

@@ -83,6 +83,15 @@ export const applyKnownModelDefaults = ({
 	const nextValues = structuredClone(values);
 	const appliedFields: string[] = [];
 
+	maybeApplyDefault({
+		appliedFields,
+		initialValues,
+		nextValues,
+		path: "displayName",
+		value: knownModel.displayName,
+		values,
+	});
+
 	if (knownModel.contextLimit !== undefined) {
 		maybeApplyDefault({
 			appliedFields,