fix(site): clarify default model delete copy

site/src/pages/AISettingsPage/ProvidersPage/UpdateProviderPage/UpdateProviderPageView.stories.tsx

@@ -153,7 +153,9 @@ export const DeleteDialogWithAssociatedModels: Story = {
 		).toBeInTheDocument();
 		await expect(screen.getByText("2 models")).toBeInTheDocument();
 		await expect(
-			screen.getByText("No other model exists to become the default."),
+			screen.getByText(
+				"Your default model will be disabled. No other model is available to become the default.",
+			),
 		).toBeInTheDocument();
 	},
 };

site/src/pages/AISettingsPage/ProvidersPage/UpdateProviderPage/UpdateProviderPageView.tsx

@@ -258,8 +258,8 @@ const UpdateProviderPageView: React.FC = () => {
 									{willReassignDefault && (
 										<li>
 											{hasDefaultReplacement
-												? "The default model will be reassigned."
-												: "No other model exists to become the default."}
+												? "Your default model will be disabled. Another model will be chosen automatically."
+												: "Your default model will be disabled. No other model is available to become the default."}
 										</li>
 									)}
 								</ul>

site/src/pages/AgentsPage/components/ChatModelAdminPanel/ChatModelAdminPanel.stories.tsx

@@ -2339,7 +2339,9 @@ export const ProviderDeleteConfirmation: Story = {
 		).toBeInTheDocument();
 		expect(body.getByText(/2 models/i)).toBeInTheDocument();
 		expect(
-			body.getByText("No other model exists to become the default."),
+			body.getByText(
+				"Your default model will be disabled. No other model is available to become the default.",
+			),
 		).toBeInTheDocument();
 		await expect(body.getByRole("dialog")).toBeInTheDocument();
 		await expect(

site/src/pages/AgentsPage/components/ChatModelAdminPanel/ProviderForm.tsx

@@ -147,8 +147,8 @@ export const ProviderForm: FC<ProviderFormProps> = ({
 					{willReassignDefault && (
 						<li>
 							{hasDefaultReplacement
-								? "The default model will be reassigned."
-								: "No other model exists to become the default."}
+								? "Your default model will be disabled. Another model will be chosen automatically."
+								: "Your default model will be disabled. No other model is available to become the default."}
 						</li>
 					)}
 				</ul>