fix(FN-2026): prevent horizontal scroll in pi extension settings

- Add word wrapping to settings helper text so long values do not force horizontal overflow
- Hide horizontal overflow in the settings content pane while preserving vertical scrolling
- Keep the existing settings layout and animations unchanged

packages/dashboard/app/components/__tests__/ModelOnboardingModal.test.tsx

@@ -2899,15 +2899,14 @@ describe("ModelOnboardingModal progressive disclosure", () => {
     it("renders all 4 disclosure trigger buttons in AI Setup step", async () => {
       render(<ModelOnboardingModal onComplete={vi.fn()} addToast={vi.fn()} />);
 
+      // Wait for async provider/model loading to settle before asserting all disclosures
       await waitFor(() => {
         expect(screen.getByText("Set Up AI")).toBeTruthy();
+        expect(screen.getByText("What are AI providers?")).toBeTruthy();
+        expect(screen.getByText("How does login work?")).toBeTruthy();
+        expect(screen.getByText("What is an API key?")).toBeTruthy();
+        expect(screen.getByText("How do I choose a model?")).toBeTruthy();
       });
-
-      // Verify all 4 disclosures are present
-      expect(screen.getByText("What are AI providers?")).toBeTruthy();
-      expect(screen.getByText("How does login work?")).toBeTruthy();
-      expect(screen.getByText("What is an API key?")).toBeTruthy();
-      expect(screen.getByText("How do I choose a model?")).toBeTruthy();
     });
 
     it("clicking disclosure trigger expands content", async () => {

packages/dashboard/app/styles.css

@@ -3321,6 +3321,8 @@ body {
   font-size: 12px;
   color: var(--text-muted);
   line-height: 1.4;
+  overflow-wrap: break-word;
+  word-break: break-word;
 }
 .form-group .field-error {
   color: var(--color-error);
@@ -3401,6 +3403,7 @@ body {
 
 .settings-content {
   flex: 1;
+  overflow-x: hidden;
   overflow-y: auto;
   padding: 4px 0 12px;
 }