feat(auth): add Discord OAuth sign-in and user timezones

Add persistent user and session storage, protected profile requests, and React sign-in controls. Capture and preserve each user's timezone, and load development and production configuration before migrations and server startup.

src/index.ts

@@ -1,15 +1,9 @@
-import { Hono } from "hono";
-import { sql } from "drizzle-orm";
 import { db } from "./db";
+import { createApi } from "./api";
+import { readAuthConfig } from "./auth/config";
 import index from "./index.html";
 
-const app = new Hono();
-
-app.get("/api/health", c => {
-  db.get(sql`SELECT 1`);
-  return c.json({ status: "ok" });
-});
-app.notFound(c => c.json({ error: "Not found" }, 404));
+const app = createApi(db, readAuthConfig());
 
 const server = Bun.serve({
   hostname: "127.0.0.1",