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/unit/createFlowValidation.test.ts

@@ -1,4 +1,5 @@
 import { describe, it, expect } from "vitest";
+import { CUSTOM_METHOD_CARD_WIZARD_MAX_DESCRIPTION_CHARS } from "../../lib/create/customMethodCardWizardConstants";
 import {
   assertPlainJsonValue,
   DEFAULT_PLAIN_JSON_LIMITS,
@@ -87,6 +88,33 @@ describe("createFlowStateSchema", () => {
     expect(r.success).toBe(false);
   });
 
+  it("accepts custom method card support text longer than 48 characters", () => {
+    const r = createFlowStateSchema.safeParse({
+      customMethodCardMetaById: {
+        "00000000-0000-4000-8000-000000000001": {
+          label: "Signal",
+          supportText:
+            "A decision is assumed approved unless objections are raised within a specified timeframe.",
+        },
+      },
+    });
+    expect(r.success).toBe(true);
+  });
+
+  it("rejects custom method card support text over the description max", () => {
+    const r = createFlowStateSchema.safeParse({
+      customMethodCardMetaById: {
+        "00000000-0000-4000-8000-000000000001": {
+          label: "Signal",
+          supportText: "x".repeat(
+            CUSTOM_METHOD_CARD_WIZARD_MAX_DESCRIPTION_CHARS + 1,
+          ),
+        },
+      },
+    });
+    expect(r.success).toBe(false);
+  });
+
   it("accepts communityStructureChipSnapshots with custom chip rows", () => {
     const r = createFlowStateSchema.safeParse({
       communityStructureChipSnapshots: {