Refactor architecture: improve env loading and command workflow

app/drizzle.config.ts

@@ -1,10 +1,11 @@
 import { defineConfig } from "drizzle-kit";
+import { env } from "./src/lib/env";
 
 export default defineConfig({
-    schema: "./schema.ts",
+    schema: "./src/db/schema.ts",
     out: "./drizzle",
     dialect: "postgresql",
     dbCredentials: {
-        url: process.env.DATABASE_URL || "postgres://kyoko:kyoko@localhost:5432/kyoko",
+        url: env.DATABASE_URL,
     },
 });