Add application codebase: PDF annotation for e-Court

Next.js 14 + Drizzle/PostgreSQL + SSE realtime sync — highlight,
freehand, comment, bookmark + ฟีเจอร์ต่อยอด F1–F19 (edit/move, undo/redo,
shapes, redaction, export PDF/CSV, reply, resolve, search, summary,
textbox, stamp, version history)

Co-Authored-By: Claude Code <noreply@anthropic.com>

app/annotate/[id]/page.tsx

@@ -0,0 +1,63 @@
+import { asc, eq, inArray } from "drizzle-orm";
+import { notFound } from "next/navigation";
+
+import { db } from "@/db";
+import {
+  annotationReplies,
+  annotations,
+  bookmarks,
+  files,
+  toAnnotationDTO,
+  toBookmarkDTO,
+  toReplyDTO,
+} from "@/db/schema";
+import PDFViewer from "@/components/pdf/PDFViewer";
+
+const UUID_RE =
+  /^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$/i;
+
+export const dynamic = "force-dynamic";
+
+export default async function AnnotatePage({
+  params,
+}: {
+  params: { id: string };
+}) {
+  const { id } = params;
+  if (!UUID_RE.test(id)) notFound();
+
+  const [file] = await db.select().from(files).where(eq(files.id, id));
+  if (!file) notFound();
+
+  const [annotationRows, bookmarkRows] = await Promise.all([
+    db
+      .select()
+      .from(annotations)
+      .where(eq(annotations.fileId, id))
+      .orderBy(asc(annotations.createdAt)),
+    db
+      .select()
+      .from(bookmarks)
+      .where(eq(bookmarks.fileId, id))
+      .orderBy(asc(bookmarks.createdAt)),
+  ]);
+
+  // replies ของทุก comment ในไฟล์นี้ (F9) — แม่ถูก CASCADE ไปแล้ว row ก็หายตาม
+  const annotationIds = annotationRows.map((r) => r.id);
+  const replyRows = annotationIds.length
+    ? await db
+        .select()
+        .from(annotationReplies)
+        .where(inArray(annotationReplies.annotationId, annotationIds))
+        .orderBy(asc(annotationReplies.createdAt))
+    : [];
+
+  return (
+    <PDFViewer
+      file={{ id: file.id, title: file.title, pdfUrl: file.pdfUrl }}
+      initialAnnotations={annotationRows.map(toAnnotationDTO)}
+      initialBookmarks={bookmarkRows.map(toBookmarkDTO)}
+      initialReplies={replyRows.map(toReplyDTO)}
+    />
+  );
+}