fix: default settings entry point to LLM page instead of Integrations

Home page 'Settings' buttons (ConnectToProviderMessage, task-suggestions)
linked to /settings/integrations. Change to /settings so users land on the
LLM settings page (first nav item in OSS mode).

Co-authored-by: openhands <openhands@all-hands.dev>

frontend/__tests__/components/features/home/repo-connector.test.tsx

@@ -493,6 +493,6 @@ describe("RepoConnector", () => {
     expect(goToSettingsButton).toBeInTheDocument();
 
     await userEvent.click(goToSettingsButton);
-    await screen.findByTestId("git-settings-screen");
+    await screen.findByTestId("settings-screen");
   });
 });

frontend/src/components/features/home/connect-to-provider-message.tsx

@@ -22,7 +22,7 @@ export function ConnectToProviderMessage() {
       </div>
       <Link
         data-testid="navigate-to-settings-button"
-        to="/settings/integrations"
+        to="/settings"
         className="self-start w-full"
       >
         <BrandButton

frontend/src/components/features/home/tasks/task-suggestions.tsx

@@ -85,10 +85,7 @@ export function TaskSuggestions({ filterFor }: TaskSuggestionsProps) {
                 {t(I18nKey.TASKS$NO_GIT_PROVIDERS_DESCRIPTION)}
               </Typography.Text>
 
-              <Link
-                to="/settings/integrations"
-                className="w-fit hover:underline"
-              >
+              <Link to="/settings" className="w-fit hover:underline">
                 <Typography.Text className="text-xs leading-4 text-[#FAFAFA] font-normal">
                   {t(I18nKey.TASKS$NO_GIT_PROVIDERS_CTA)}
                 </Typography.Text>