feat(11.1-02): update prepare route to fetch agentInitialsData, add 422 guard, pass to preparePdf

- Fetch agentInitialsData alongside agentSignatureData in single DB query
- Add 422 guard returning { error: 'agent-initials-missing' } when agent-initials fields present but no initials saved
- Pass agentInitialsData as 6th arg to preparePdf()

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

@@ -40,12 +40,13 @@ export async function POST(
   const sigFields = (doc.signatureFields as import('@/lib/db/schema').SignatureFieldData[]) ?? [];
   const textFields = body.textFillData ?? {};
 
-  // Fetch agent's saved signature for embedding at agent-signature field coordinates
+  // Fetch agent's saved signature and initials for embedding at agent-owned field coordinates
   const agentUser = await db.query.users.findFirst({
     where: eq(users.id, session.user.id),
-    columns: { agentSignatureData: true },
+    columns: { agentSignatureData: true, agentInitialsData: true },
   });
   const agentSignatureData = agentUser?.agentSignatureData ?? null;
+  const agentInitialsData = agentUser?.agentInitialsData ?? null;
 
   // Guard: if document has agent-signature fields but no signature saved, block prepare
   const hasAgentSigFields = sigFields.some(f => getFieldType(f) === 'agent-signature');
@@ -56,7 +57,16 @@ export async function POST(
     );
   }
 
-  await preparePdf(srcPath, destPath, textFields, sigFields, agentSignatureData);
+  // Guard: agent-initials fields present but no initials saved
+  const hasAgentInitialsFields = sigFields.some(f => getFieldType(f) === 'agent-initials');
+  if (hasAgentInitialsFields && !agentInitialsData) {
+    return Response.json(
+      { error: 'agent-initials-missing', message: 'No agent initials saved. Go to Profile to save your initials first.' },
+      { status: 422 }
+    );
+  }
+
+  await preparePdf(srcPath, destPath, textFields, sigFields, agentSignatureData, agentInitialsData);
 
   const [updated] = await db
     .update(documents)