fix(signers): show invalid email error, persist signers immediately via PATCH, add PATCH /api/documents/[id]

teressa-copeland-homes/src/app/api/documents/[id]/route.ts

@@ -0,0 +1,36 @@
+import { NextResponse } from 'next/server';
+import { auth } from '@/lib/auth';
+import { db } from '@/lib/db';
+import { documents } from '@/lib/db/schema';
+import type { DocumentSigner } from '@/lib/db/schema';
+import { eq } from 'drizzle-orm';
+
+// PATCH /api/documents/[id] — partial update (signers, name, etc.)
+export async function PATCH(
+  req: Request,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  const session = await auth();
+  if (!session) return new Response('Unauthorized', { status: 401 });
+
+  const { id } = await params;
+  const body = await req.json() as { signers?: DocumentSigner[] };
+
+  const doc = await db.query.documents.findFirst({ where: eq(documents.id, id) });
+  if (!doc) return NextResponse.json({ error: 'Not found' }, { status: 404 });
+
+  const updates: Partial<typeof documents.$inferInsert> = {};
+  if (body.signers !== undefined) updates.signers = body.signers;
+
+  if (Object.keys(updates).length === 0) {
+    return NextResponse.json({ ok: true });
+  }
+
+  const [updated] = await db
+    .update(documents)
+    .set(updates)
+    .where(eq(documents.id, id))
+    .returning();
+
+  return NextResponse.json(updated);
+}

teressa-copeland-homes/src/app/portal/(protected)/documents/[docId]/_components/PreparePanel.tsx

@@ -67,6 +67,16 @@ export function PreparePanel({
   const [signerInput, setSignerInput] = useState('');
   const [signerInputError, setSignerInputError] = useState<string | null>(null);
 
+  async function saveSigners(updated: DocumentSigner[]) {
+    onSignersChange?.(updated);
+    // Persist immediately so signers survive page refresh
+    await fetch(`/api/documents/${docId}`, {
+      method: 'PATCH',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ signers: updated }),
+    });
+  }
+
   function handleAddSigner() {
     const email = signerInput.trim().toLowerCase();
     if (!email || !isValidEmail(email)) {
@@ -78,14 +88,14 @@ export function PreparePanel({
       return;
     }
     const color = SIGNER_COLORS[signers.length % SIGNER_COLORS.length];
-    onSignersChange?.([...signers, { email, color }]);
+    saveSigners([...signers, { email, color }]);
     setSignerInput('');
     setSignerInputError(null);
   }
 
   function handleRemoveSigner(email: string) {
-    onSignersChange?.(signers.filter(s => s.email !== email));
-    // Clear validation state since signer count changed
+    const updated = signers.filter(s => s.email !== email);
+    saveSigners(updated);
     onUnassignedFieldIdsChange?.(new Set());
   }
 
@@ -329,6 +339,9 @@ export function PreparePanel({
           </button>
         </div>
         <p className="text-xs text-gray-400 mt-1">Each signer receives their own signing link.</p>
+        {signerInputError === 'invalid' && (
+          <p className="text-sm text-red-600 mt-1">Please enter a valid email address.</p>
+        )}
         {signerInputError === 'duplicate' && (
           <p className="text-sm text-red-600 mt-1">That email is already in the signer list.</p>
         )}