add rest api routes for threads, messages

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

backend/src/index.ts

@@ -1,5 +1,9 @@
 import { Hono } from "hono";
 import { cors } from "hono/cors";
+import { emailRoutes } from "./routes/emails";
+import { createDatabase } from "./db/index";
+
+const db = createDatabase(process.env.DB_PATH ?? "magnumopus.db");
 
 const app = new Hono();
 
@@ -7,6 +11,8 @@ app.use("*", cors());
 
 app.get("/health", (c) => c.json({ status: "ok" }));
 
+app.route("/api", emailRoutes(db));
+
 export default {
 	port: Number(process.env.PORT ?? 3000),
 	fetch: app.fetch,