Stop treating login/save-progress as a 48-character email limit.

The overlay was failing Zod on preset method-card support text attached with the draft; raise that cap, allow RFC-length emails, and drop Back to home from the overlay.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/components/LoginForm.test.tsx

@@ -43,6 +43,7 @@ vi.mock("../../app/(app)/create/utils/anonymousDraftStorage", async (importOrigi
   };
 });
 
+import { EMAIL_MAX_LEN } from "../../lib/create/isValidCreateFlowSaveEmail";
 import { requestMagicLink } from "../../lib/create/api";
 import { setTransferPendingFlag } from "../../app/(app)/create/utils/anonymousDraftStorage";
 
@@ -70,7 +71,7 @@ describe("LoginForm", () => {
     ).toBeInTheDocument();
     expect(
       screen.getByRole("textbox", { name: /email address/i }),
-    ).toBeInTheDocument();
+    ).toHaveAttribute("maxLength", String(EMAIL_MAX_LEN));
     expect(
       screen.getByRole("button", { name: /send me a magic link/i }),
     ).toBeInTheDocument();
@@ -126,6 +127,24 @@ describe("LoginForm", () => {
     expect(screen.getByText(/we sent a sign-in link/i)).toBeInTheDocument();
   });
 
+  it("submits a long email without treating length as invalid", async () => {
+    const user = userEvent.setup();
+    const email =
+      "very.long.local-part.for.testing@subdomain.example.communityrule.org";
+    vi.mocked(requestMagicLink).mockResolvedValue({ ok: true });
+    renderLoginForm();
+    await user.type(
+      screen.getByRole("textbox", { name: /email address/i }),
+      email,
+    );
+    await user.click(
+      screen.getByRole("button", { name: /send me a magic link/i }),
+    );
+    await waitFor(() => {
+      expect(requestMagicLink).toHaveBeenCalledWith(email, "/", undefined);
+    });
+  });
+
   it("saveProgress variant uses magicLinkNextPath and sets transfer pending on success", async () => {
     const user = userEvent.setup();
     vi.mocked(requestMagicLink).mockResolvedValue({ ok: true });