feat(06-05): confirmation page + router.push redirect after signing

- Rewrite confirmed/page.tsx: verifies signing token, shows document name + signed timestamp + download button
- Generate 15-min download token server-side; pass as dt= query param to /api/sign/[token]/download
- Success checkmark (navy circle + gold checkmark), document name, formatted signed date
- Download link valid for 15 minutes note shown below button
- Update SigningPageClient.tsx: replace window.location.href with router.push for SPA navigation

teressa-copeland-homes/src/app/sign/[token]/_components/SigningPageClient.tsx

@@ -1,6 +1,7 @@
 'use client';
 
 import { useState, useRef, useCallback } from 'react';
+import { useRouter } from 'next/navigation';
 import { Document, Page, pdfjs } from 'react-pdf';
 import 'react-pdf/dist/Page/AnnotationLayer.css';
 import 'react-pdf/dist/Page/TextLayer.css';
@@ -40,6 +41,7 @@ export function SigningPageClient({
   documentName,
   signatureFields,
 }: SigningPageClientProps) {
+  const router = useRouter();
   const [numPages, setNumPages] = useState(0);
   // Map from page number (1-indexed) to rendered dimensions
   const [pageDimensions, setPageDimensions] = useState<Record<number, PageDimensions>>({});
@@ -133,10 +135,10 @@ export function SigningPageClient({
         body: JSON.stringify({ signatures: signaturesRef.current }),
       });
       if (res.ok) {
-        window.location.href = `/sign/${token}/confirmed`;
+        router.push(`/sign/${token}/confirmed`);
       } else if (res.status === 409) {
         // Already signed — navigate to confirmed anyway
-        window.location.href = `/sign/${token}/confirmed`;
+        router.push(`/sign/${token}/confirmed`);
       } else {
         const data = await res.json().catch(() => ({}));
         alert(`Submission failed: ${(data as { error?: string }).error ?? res.status}. Please try again.`);

teressa-copeland-homes/src/app/sign/[token]/confirmed/page.tsx

@@ -1,7 +1,56 @@
-// /sign/[token]/confirmed — shown after a document is successfully signed
-// Static success screen; no token re-validation needed (submission already committed)
+import { verifySigningToken, createDownloadToken } from '@/lib/signing/token';
+import { db } from '@/lib/db';
+import { signingTokens, documents } from '@/lib/db/schema';
+import { eq } from 'drizzle-orm';
 
-export default function ConfirmedPage() {
+interface Props {
+  params: Promise<{ token: string }>;
+}
+
+export default async function ConfirmedPage({ params }: Props) {
+  const { token } = await params;
+
+  // Verify signing token to get documentId (allow expired — confirmation page visited after signing)
+  let documentId: string | null = null;
+  let jti: string | null = null;
+  try {
+    const payload = await verifySigningToken(token);
+    documentId = payload.documentId;
+    jti = payload.jti;
+  } catch {
+    // Token expired is OK here — signing may have happened right before expiry
+    // documentId/jti remain null — handled below
+  }
+
+  if (!documentId) {
+    return (
+      <div
+        style={{
+          padding: '40px',
+          textAlign: 'center',
+          fontFamily: 'Georgia, serif',
+          color: '#1B2B4B',
+        }}
+      >
+        Document not found.
+      </div>
+    );
+  }
+
+  const doc = await db.query.documents.findFirst({
+    where: eq(documents.id, documentId),
+  });
+
+  // Get signed timestamp from signingTokens.usedAt
+  let signedAt: Date | null = null;
+  if (jti) {
+    const tokenRow = await db.query.signingTokens.findFirst({
+      where: eq(signingTokens.jti, jti),
+    });
+    signedAt = tokenRow?.usedAt ?? doc?.signedAt ?? null;
+  }
+
+  if (!doc || !doc.signedFilePath) {
     return (
       <div
         style={{
@@ -13,59 +62,91 @@ export default function ConfirmedPage() {
           fontFamily: 'Georgia, serif',
         }}
       >
-      <div style={{ textAlign: 'center', maxWidth: '480px', padding: '40px' }}>
-        {/* Branded header strip */}
-        <div
-          style={{
-            backgroundColor: '#1B2B4B',
-            color: '#fff',
-            padding: '16px 24px',
-            borderRadius: '8px 8px 0 0',
-            marginBottom: 0,
-          }}
-        >
-          <div style={{ fontSize: '18px', fontWeight: 'bold', letterSpacing: '0.02em' }}>
-            Teressa Copeland Homes
-          </div>
-        </div>
-
-        {/* Success card */}
-        <div
-          style={{
-            backgroundColor: '#fff',
-            border: '1px solid #e0e0e0',
-            borderTop: 'none',
-            borderRadius: '0 0 8px 8px',
-            padding: '40px 32px',
-            boxShadow: '0 2px 12px rgba(0,0,0,0.08)',
-          }}
-        >
-          <div style={{ fontSize: '56px', marginBottom: '16px', color: '#22c55e' }}>&#10003;</div>
-          <h1 style={{ color: '#1B2B4B', fontSize: '24px', marginBottom: '12px', margin: '0 0 12px' }}>
-            Document Signed
-          </h1>
-          <p
-            style={{
-              color: '#555',
-              fontSize: '16px',
-              lineHeight: '1.6',
-              margin: '0 0 24px',
-            }}
-          >
-            Your signature has been recorded and the document has been securely submitted.
-            Teressa Copeland will be in touch shortly.
-          </p>
-          <div
-            style={{
-              fontSize: '13px',
-              color: '#999',
-              borderTop: '1px solid #f0f0f0',
-              paddingTop: '16px',
-            }}
-          >
-            You may close this window.
-          </div>
-        </div>
+        <div style={{ textAlign: 'center', padding: '40px' }}>
+          <h1 style={{ color: '#1B2B4B' }}>Document not yet available</h1>
+          <p style={{ color: '#555' }}>Please check back shortly.</p>
+        </div>
+      </div>
+    );
+  }
+
+  // Generate 15-minute download token for client copy
+  const downloadToken = await createDownloadToken(doc.id);
+  const downloadUrl = `/api/sign/${token}/download?dt=${downloadToken}`;
+
+  const formattedDate = signedAt
+    ? signedAt.toLocaleString('en-US', {
+        month: 'long',
+        day: 'numeric',
+        year: 'numeric',
+        hour: 'numeric',
+        minute: '2-digit',
+      })
+    : 'Just now';
+
+  return (
+    <div
+      style={{
+        minHeight: '100vh',
+        backgroundColor: '#FAF9F7',
+        fontFamily: 'Georgia, serif',
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'center',
+      }}
+    >
+      <div style={{ textAlign: 'center', maxWidth: '480px', padding: '48px 32px' }}>
+        {/* Success checkmark */}
+        <div
+          style={{
+            width: '72px',
+            height: '72px',
+            borderRadius: '50%',
+            backgroundColor: '#1B2B4B',
+            color: '#C9A84C',
+            fontSize: '36px',
+            display: 'flex',
+            alignItems: 'center',
+            justifyContent: 'center',
+            margin: '0 auto 24px',
+          }}
+        >
+          &#10003;
+        </div>
+        <h1 style={{ color: '#1B2B4B', fontSize: '26px', marginBottom: '8px' }}>
+          You&apos;ve signed
+        </h1>
+        <p
+          style={{
+            color: '#1B2B4B',
+            fontSize: '20px',
+            fontWeight: 'bold',
+            marginBottom: '8px',
+          }}
+        >
+          {doc.name}
+        </p>
+        <p style={{ color: '#888', fontSize: '14px', marginBottom: '32px' }}>
+          Signed on {formattedDate}
+        </p>
+        <a
+          href={downloadUrl}
+          style={{
+            display: 'inline-block',
+            backgroundColor: '#C9A84C',
+            color: '#fff',
+            padding: '12px 28px',
+            borderRadius: '4px',
+            textDecoration: 'none',
+            fontWeight: 'bold',
+            fontSize: '15px',
+          }}
+        >
+          Download your copy
+        </a>
+        <p style={{ color: '#aaa', fontSize: '12px', marginTop: '16px' }}>
+          Download link valid for 15 minutes.
+        </p>
       </div>
     </div>
   );