fix(FN-2404): scope onboarding first-task creation to active project

- Guard onboarding first-task creation when no project is selected
- Pass projectId to createTask so onboarding tasks are created in the active project
- Update AppModals wiring tests to verify projectId forwarding for selected and unselected states
- Expand onboarding modal and flow regression tests to assert project-scoped task creation calls

packages/dashboard/app/components/ModelOnboardingModal.tsx

@@ -1197,6 +1197,10 @@ export function ModelOnboardingModal({
   }, [completeOnboarding, completedSteps, skippedSteps]);
 
   const handleCreateFirstTask = useCallback(async () => {
+    if (!projectId) {
+      return;
+    }
+
     const trimmedDescription = firstTaskDescription.trim();
     if (!trimmedDescription) {
       setTaskCreationError("Please enter a task description.");
@@ -1209,7 +1213,7 @@ export function ModelOnboardingModal({
     let success = false;
 
     try {
-      const createdTask = await createTask({ description: trimmedDescription });
+      const createdTask = await createTask({ description: trimmedDescription }, projectId);
       setInlineCreatedTask(createdTask);
       setShowTaskCreated(true);
       trackOnboardingEvent("onboarding:first-task-created", { taskId: createdTask?.id });
@@ -1229,7 +1233,7 @@ export function ModelOnboardingModal({
     if (success) {
       void completeOnboarding();
     }
-  }, [firstTaskDescription, addToast, completeOnboarding]);
+  }, [projectId, firstTaskDescription, addToast, completeOnboarding]);
 
   // Handle first task CTA - mark complete, close modal, then open new task
   const handleOpenNewTask = useCallback(async () => {

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

@@ -213,7 +213,7 @@ describe("AppModals", () => {
   });
 
   describe("ModelOnboardingModal wiring", () => {
-    it("passes project context and setup-wizard callback into onboarding modal", () => {
+    it("passes empty project id and setup-wizard callback into onboarding modal when no project is selected", () => {
       const handleAddProject = vi.fn();
       const manager = { ...mockModalManager, modelOnboardingOpen: true };
 
@@ -240,6 +240,32 @@ describe("AppModals", () => {
       expect(props.projectId).toBe("");
       expect(props.onOpenSetupWizard).toBe(handleAddProject);
     });
+
+    it("passes active project id into onboarding modal when a project is selected", () => {
+      const manager = { ...mockModalManager, modelOnboardingOpen: true };
+
+      render(
+        <AppModals
+          projectId="proj_123"
+          tasks={[]}
+          projects={[]}
+          currentProject={null}
+          addToast={vi.fn()}
+          toasts={mockToasts}
+          removeToast={vi.fn()}
+          modalManager={manager}
+          projectActions={{ handleAddProject: vi.fn(), handleSetupComplete: vi.fn(), handleModelOnboardingComplete: vi.fn() }}
+          taskHandlers={{ handleModalCreate: vi.fn(), handlePlanningTaskCreated: vi.fn(), handlePlanningTasksCreated: vi.fn(), handleSubtaskTasksCreated: vi.fn(), handleGitHubImport: vi.fn() }}
+          taskOperations={{ moveTask: vi.fn(), deleteTask: vi.fn(), mergeTask: vi.fn(), retryTask: vi.fn(), duplicateTask: vi.fn() }}
+          deepLink={{ handleDetailClose: vi.fn() }}
+          settings={mockSettings}
+        />,
+      );
+
+      expect(mockModelOnboardingModalProps).toHaveBeenCalledTimes(1);
+      const props = mockModelOnboardingModalProps.mock.calls[0][0];
+      expect(props.projectId).toBe("proj_123");
+    });
   });
 
   describe("ScheduledTasksModal projectId forwarding", () => {

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

@@ -1476,6 +1476,16 @@ describe("ModelOnboardingModal", () => {
 
       expect(screen.queryByTestId("onboarding-task-error")).toBeNull();
       expect(mockCreateTask).toHaveBeenCalledTimes(2);
+      expect(mockCreateTask).toHaveBeenNthCalledWith(
+        1,
+        { description: "Build auth" },
+        "proj_123",
+      );
+      expect(mockCreateTask).toHaveBeenNthCalledWith(
+        2,
+        { description: "Build auth" },
+        "proj_123",
+      );
     });
 
     it("disables first-task submit button while creating the task", async () => {

packages/dashboard/app/components/__tests__/onboarding-flow.test.tsx

@@ -762,7 +762,10 @@ describe("onboarding flow integration", () => {
       await simulateFirstTaskCreation(renderResult, "Ship onboarding telemetry");
 
       await waitFor(() => {
-        expect(mockCreateTask).toHaveBeenCalledWith({ description: "Ship onboarding telemetry" });
+        expect(mockCreateTask).toHaveBeenCalledWith(
+          { description: "Ship onboarding telemetry" },
+          "proj_123",
+        );
       });
 
       expect(mockMarkOnboardingCompleted).toHaveBeenCalled();