feat: implement database and AI provider configuration settings with Google GenAI integration

src/app/api/admin/ai-config/route.ts

@@ -0,0 +1,24 @@
+import { NextResponse } from "next/server";
+import { auth } from "@/lib/auth";
+import fs from "fs/promises";
+import path from "path";
+
+export async function GET() {
+    const session = await auth();
+    if (!session || (session.user as any)?.role !== "admin") {
+        return NextResponse.json({ error: "Unauthorized" }, { status: 403 });
+    }
+
+    try {
+        const configFile = path.join(process.cwd(), "data", ".db-config.json");
+        const data = await fs.readFile(configFile, "utf-8");
+        const config = JSON.parse(data);
+        return NextResponse.json({
+            provider: config.aiProvider ?? "openrouter",
+            openRouterModel: config.openRouterModel,
+            googleAiModel: config.googleAiModel,
+        });
+    } catch {
+        return NextResponse.json({ provider: "openrouter" });
+    }
+}