Step 3 migration: frontend reads API with local fallback

api/server.js

@@ -122,6 +122,60 @@ async function getCatalogTree() {
   return Array.from(brandMap.values());
 }
 
+async function getCatalogFull() {
+  const brandConsoleRows = await pool.query(`
+    SELECT
+      b.name AS brand_name,
+      c.name AS console_name
+    FROM brands b
+    LEFT JOIN consoles c ON c.brand_id = b.id
+    ORDER BY b.name ASC, c.name ASC;
+  `);
+
+  const gameRows = await pool.query(`
+    SELECT
+      c.name AS console_name,
+      g.id::text AS id,
+      g.title,
+      g.genre,
+      g.publisher,
+      g.release_year,
+      g.estimated_value,
+      g.loaned_to,
+      g.created_at
+    FROM games g
+    JOIN consoles c ON c.id = g.console_id
+    ORDER BY g.created_at DESC;
+  `);
+
+  const brands = {};
+  for (const row of brandConsoleRows.rows) {
+    const brand = row.brand_name;
+    brands[brand] = brands[brand] || [];
+    if (row.console_name && !brands[brand].includes(row.console_name)) {
+      brands[brand].push(row.console_name);
+    }
+  }
+
+  const gamesByConsole = {};
+  for (const row of gameRows.rows) {
+    const consoleName = row.console_name;
+    gamesByConsole[consoleName] = gamesByConsole[consoleName] || [];
+    gamesByConsole[consoleName].push({
+      id: row.id,
+      title: row.title,
+      genre: row.genre || "",
+      publisher: row.publisher || "",
+      year: row.release_year || null,
+      value: row.estimated_value != null ? Number(row.estimated_value) : null,
+      loanedTo: row.loaned_to || "",
+      createdAt: row.created_at,
+    });
+  }
+
+  return { brands, gamesByConsole };
+}
+
 async function handleRequest(request, response) {
   const url = new URL(request.url || "/", `http://${request.headers.host || "localhost"}`);
 
@@ -165,6 +219,16 @@ async function handleRequest(request, response) {
     return;
   }
 
+  if (request.method === "GET" && url.pathname === "/api/catalog/full") {
+    try {
+      const full = await getCatalogFull();
+      sendJson(response, 200, full);
+    } catch (error) {
+      sendJson(response, 500, { status: "error", message: error.message });
+    }
+    return;
+  }
+
   sendJson(response, 404, {
     status: "not_found",
     message: "Route not found",