Prefill notification email in Add Company wizard with the account's own email

Was always blank by default. Now prefilled from useCurrentUser() once it
loads (defaultValues can't do this since the query resolves after mount),
gated on the field not being dirty yet so it never clobbers something the
user already typed - still fully editable either way.

Co-Authored-By: Claude Sonnet 5 <[email protected]>

apps/web/tests/add-company-wizard.test.tsx

@@ -51,6 +51,16 @@ const EXISTING_COMPANIES = [
   },
 ];
 
+const CURRENT_USER = {
+  id: "user-1",
+  email: "[email protected]",
+  display_name: "Team Person",
+  timezone: "America/New_York",
+  is_active: true,
+  is_admin: false,
+  auth_mode: "local",
+};
+
 function mockFetchImplementation(existingCompanies: unknown[] = []) {
   return vi.fn().mockImplementation((url: string, init?: RequestInit) => {
     const path = url.replace("http://localhost:8000", "");
@@ -60,6 +70,9 @@ function mockFetchImplementation(existingCompanies: unknown[] = []) {
     if (path === "/api/v1/companies" && (!init?.method || init.method === "GET")) {
       return Promise.resolve({ ok: true, status: 200, json: async () => existingCompanies });
     }
+    if (path === "/api/v1/auth/me") {
+      return Promise.resolve({ ok: true, status: 200, json: async () => CURRENT_USER });
+    }
     return Promise.resolve({ ok: false, status: 404, json: async () => ({ detail: "not found" }) });
   });
 }
@@ -128,4 +141,26 @@ describe("AddCompanyWizardPage", () => {
     });
     expect(screen.queryByText(/you might already be monitoring/i)).not.toBeInTheDocument();
   });
+
+  it("pre-fills the notification email with the account's own email, still editable", async () => {
+    const user = userEvent.setup();
+    renderWithQueryClient(<AddCompanyWizardPage />);
+
+    await user.type(screen.getByLabelText("Company name"), "Acme Widgets");
+    await user.click(screen.getByRole("button", { name: /discover company/i }));
+    await waitFor(() => {
+      expect(screen.getByText(/here's what we found for/i)).toBeInTheDocument();
+    });
+
+    await user.click(screen.getByRole("button", { name: /^continue$/i })); // Review -> Schedule
+    await user.click(screen.getByRole("button", { name: /^continue$/i })); // Schedule -> Notifications
+
+    const email = (await screen.findByLabelText("Notification email")) as HTMLInputElement;
+    await waitFor(() => expect(email.value).toBe("[email protected]"));
+
+    // Still editable - prefilling must not lock the field.
+    await user.clear(email);
+    await user.type(email, "[email protected]");
+    expect(email.value).toBe("[email protected]");
+  });
 });