fix(FN-2498): keep New Task more options collapsed by default

- Add an autoExpandMoreOptionsOnSelection prop to TaskForm and gate advanced-section auto-expansion behind it
- Disable auto-expansion in NewTaskModal so default-on workflow step preselection does not open More options on first render
- Mark collapsed advanced content with the hidden attribute to prevent interaction until expanded
- Add dashboard tests for default collapsed state, opt-out auto-expand behavior, and default-on workflow-step regression coverage
- Replace hardcoded spacing/transition values in NewTaskModal.css with design tokens

packages/dashboard/app/components/NewTaskModal.css

@@ -4,7 +4,7 @@
 }
 
 .new-task-modal .modal-body {
-  padding: 20px 24px;
+  padding: var(--space-xl);
   overflow-y: auto;
   max-height: calc(80vh - 120px);
   flex: 1;
@@ -13,7 +13,7 @@
 
 .new-task-modal .form-group {
   margin-top: 0;
-  margin-bottom: 20px;
+  margin-bottom: var(--space-xl);
   padding: 0;
 }
 
@@ -26,7 +26,7 @@
 }
 
 .new-task-modal .checkbox-label {
-  margin-bottom: 4px !important;
+  margin-bottom: var(--space-xs) !important;
 }
 
 .task-form-primary-section {
@@ -72,7 +72,7 @@
   width: fit-content;
   margin-top: 0;
   margin-bottom: 0;
-  padding: 6px;
+  padding: var(--space-sm);
   border: 1px solid var(--border-subtle);
   border-radius: var(--radius-md);
   background: var(--bg-tertiary);
@@ -88,7 +88,7 @@
   align-items: center;
   justify-content: space-between;
   gap: var(--space-sm);
-  padding: 10px 2px;
+  padding: var(--space-sm) var(--space-xs);
   margin: 0 0 var(--space-sm);
   border: none;
   border-top: 1px solid var(--border-subtle);
@@ -118,18 +118,18 @@
 }
 
 .task-form-more-options {
-  margin-left: 6px;
+  margin-left: var(--space-sm);
-  padding-left: 12px;
+  padding-left: var(--space-md);
   border-left: 1px solid var(--border-subtle);
   overflow: hidden;
   max-height: 2400px;
   opacity: 1;
   transition:
-    max-height 0.24s ease,
+    max-height var(--transition-slow),
-    opacity 0.2s ease,
+    opacity var(--transition-normal),
-    margin-top 0.2s ease,
+    margin-top var(--transition-normal),
-    padding 0.2s ease,
+    padding var(--transition-normal),
-    border-color 0.2s ease;
+    border-color var(--transition-normal);
 }
 
 .task-form-more-options.collapsed {
@@ -157,7 +157,7 @@
 }
 
 .task-form-more-options .form-group small {
-  margin-top: 6px;
+  margin-top: var(--space-sm);
   color: var(--text-secondary, var(--text-muted));
 }
 
@@ -267,7 +267,7 @@
 .workflow-step-order-actions {
   display: flex;
   align-items: center;
-  gap: 2px;
+  gap: var(--space-xs);
   flex-shrink: 0;
 }
 

packages/dashboard/app/components/NewTaskModal.tsx

@@ -455,6 +455,7 @@ export function NewTaskModal({ isOpen, onClose, projectId, tasks, onCreateTask,
             onPriorityChange={setPriority}
             renderBelowPrimary={quickFields}
             hideDependencies={true}
+            autoExpandMoreOptionsOnSelection={false}
           />
 
         </div>

packages/dashboard/app/components/TaskForm.tsx

@@ -88,6 +88,8 @@ export interface TaskFormProps {
   renderBelowPrimary?: React.ReactNode;
   /** When true, skip rendering the Dependencies form-group inside "More options". Use when the parent renders its own dependency UI via renderBelowPrimary. */
   hideDependencies?: boolean;
+  /** When true (default), More options auto-expands when non-default advanced selections are present. */
+  autoExpandMoreOptionsOnSelection?: boolean;
 }
 
 export function TaskForm({
@@ -128,6 +130,7 @@ export function TaskForm({
   onClose,
   renderBelowPrimary,
   hideDependencies,
+  autoExpandMoreOptionsOnSelection = true,
   reviewLevel,
   onReviewLevelChange,
 }: TaskFormProps) {
@@ -144,7 +147,9 @@ export function TaskForm({
     reviewLevel !== undefined;
 
   const [showDepDropdown, setShowDepDropdown] = useState(false);
-  const [showMoreOptions, setShowMoreOptions] = useState(hasInitialMoreOptions);
+  const [showMoreOptions, setShowMoreOptions] = useState(
+    autoExpandMoreOptionsOnSelection ? hasInitialMoreOptions : false,
+  );
   const [depSearch, setDepSearch] = useState("");
   const [availableModels, setAvailableModels] = useState<ModelInfo[]>([]);
   const [favoriteProviders, setFavoriteProviders] = useState<string[]>([]);
@@ -243,11 +248,16 @@ export function TaskForm({
 
   // Auto-expand advanced options when non-default values are present.
   useEffect(() => {
+    if (!autoExpandMoreOptionsOnSelection) {
+      hadMoreOptionSelectionsRef.current = hasMoreOptionSelections;
+      return;
+    }
+
     if (hasMoreOptionSelections && !hadMoreOptionSelectionsRef.current) {
       setShowMoreOptions(true);
     }
     hadMoreOptionSelectionsRef.current = hasMoreOptionSelections;
-  }, [hasMoreOptionSelections]);
+  }, [hasMoreOptionSelections, autoExpandMoreOptionsOnSelection]);
 
   // Keep dependency dropdown state clean when advanced options are collapsed.
   useEffect(() => {
@@ -731,6 +741,7 @@ export function TaskForm({
         id="task-form-more-options"
         className={`task-form-more-options${showMoreOptions ? "" : " collapsed"}`}
         aria-hidden={!showMoreOptions}
+        hidden={!showMoreOptions}
         data-testid="task-form-more-options"
       >
       {/* Attachments */}

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

@@ -97,7 +97,9 @@ describe("NewTaskModal", () => {
     renderNewTaskModal();
 
     const toggle = screen.getByTestId("task-form-more-options-toggle");
+    const moreOptions = screen.getByTestId("task-form-more-options");
     expect(toggle).toHaveAttribute("aria-expanded", "false");
+    expect(moreOptions).toHaveAttribute("hidden");
     // Dependencies are now in quick-fields (visible by default), so the dep-trigger is present
     expect(screen.getByTestId("dep-trigger")).toBeInTheDocument();
 
@@ -105,6 +107,7 @@ describe("NewTaskModal", () => {
 
     await waitFor(() => {
       expect(toggle).toHaveAttribute("aria-expanded", "true");
+      expect(moreOptions).not.toHaveAttribute("hidden");
     });
     // Model Configuration, Attachments, and Workflow Steps are revealed
     expect(screen.getByText(/Model Configuration/i)).toBeTruthy();
@@ -536,6 +539,32 @@ describe("NewTaskModal", () => {
 
   // DefaultOn workflow step handling (FN-883)
   describe("defaultOn workflow step handling", () => {
+    it("keeps More options collapsed by default even when defaultOn workflow steps are auto-applied", async () => {
+      const { fetchWorkflowSteps } = await import("../../api");
+      vi.mocked(fetchWorkflowSteps).mockResolvedValueOnce([
+        { id: "WS-001", name: "QA Check", description: "Run tests", prompt: "Check tests", enabled: true, defaultOn: true, createdAt: "", updatedAt: "" },
+      ]);
+
+      renderNewTaskModal();
+
+      await waitFor(() => {
+        expect(screen.getByTestId("workflow-step-checkbox-WS-001")).toBeTruthy();
+      });
+
+      const toggle = screen.getByTestId("task-form-more-options-toggle");
+      expect(toggle).toHaveAttribute("aria-expanded", "false");
+
+      fireEvent.click(toggle);
+
+      await waitFor(() => {
+        expect(toggle).toHaveAttribute("aria-expanded", "true");
+      });
+
+      expect(screen.getByText(/Model Configuration/i)).toBeTruthy();
+      expect(screen.getByText(/Attachments/i)).toBeTruthy();
+      expect(screen.getByText(/Workflow Steps/i)).toBeTruthy();
+    });
+
     it("sends undefined enabledWorkflowSteps when no defaultOn steps and user hasn't interacted", async () => {
       const { fetchWorkflowSteps } = await import("../../api");
       vi.mocked(fetchWorkflowSteps).mockResolvedValueOnce([

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

@@ -1116,6 +1116,42 @@ describe("TaskForm defaultOn auto-selection (FN-883)", () => {
     expect(onDefaultOnApplied).toHaveBeenCalledWith(["WS-001"]);
   });
 
+  it("auto-expands More options by default when advanced selections are prefilled", () => {
+    renderTaskForm({
+      mode: "create",
+      selectedWorkflowSteps: ["WS-001"],
+    });
+
+    expect(screen.getByTestId("task-form-more-options-toggle")).toHaveAttribute("aria-expanded", "true");
+  });
+
+  it("stays collapsed when auto-expand is disabled even with prefilled advanced selections", () => {
+    renderTaskForm({
+      mode: "create",
+      selectedWorkflowSteps: ["WS-001"],
+      autoExpandMoreOptionsOnSelection: false,
+    });
+
+    expect(screen.getByTestId("task-form-more-options-toggle")).toHaveAttribute("aria-expanded", "false");
+  });
+
+  it("hides advanced controls from interaction when More options is collapsed", () => {
+    renderTaskForm({ mode: "create" });
+
+    const toggle = screen.getByTestId("task-form-more-options-toggle");
+    const moreOptions = screen.getByTestId("task-form-more-options");
+
+    expect(toggle).toHaveAttribute("aria-expanded", "false");
+    expect(moreOptions).toHaveAttribute("hidden");
+    expect(moreOptions).toHaveAttribute("aria-hidden", "true");
+
+    fireEvent.click(toggle);
+
+    expect(toggle).toHaveAttribute("aria-expanded", "true");
+    expect(moreOptions).not.toHaveAttribute("hidden");
+    expect(moreOptions).toHaveAttribute("aria-hidden", "false");
+  });
+
   it("does not auto-select workflow steps in edit mode", async () => {
     const { fetchWorkflowSteps } = await import("../../api");
     vi.mocked(fetchWorkflowSteps).mockResolvedValueOnce([