feat(ledger): add bookkeeping workbench and transaction views

- Add transactions_dirty table and zero-tolerance cleansing action

- Implement bookkeeping workbench (/bookkeeping) with searchable Combobox channel selector and card suffix / account identifier

- Implement transaction ledger (/transactions) with date groupings, multi-currency metrics, and filters

- Update AGENTS.md guidelines for Base UI Select and Combobox bindings

lib/db/index.ts

@@ -1,15 +1,17 @@
-import { drizzle } from "drizzle-orm/postgres-js";
-import postgres from "postgres";
-import * as schema from "./schema";
+import { drizzle } from "drizzle-orm/postgres-js"
+import postgres from "postgres"
+import * as schema from "./schema"
 
-const connectionString = process.env.DATABASE_URL || "postgresql://postgres:Aa110011@localhost:5432/fluxent";
+const connectionString =
+  process.env.DATABASE_URL ||
+  "postgresql://postgres:Aa110011@localhost:5432/fluxent"
 
 // 在 Next.js 开发环境下避免热重载创建重复连接池
 const globalForDb = globalThis as unknown as {
-  conn: postgres.Sql | undefined;
-};
+  conn: postgres.Sql | undefined
+}
 
-const client = globalForDb.conn ?? postgres(connectionString, { max: 10 });
-if (process.env.NODE_ENV !== "production") globalForDb.conn = client;
+const client = globalForDb.conn ?? postgres(connectionString, { max: 10 })
+if (process.env.NODE_ENV !== "production") globalForDb.conn = client
 
-export const db = drizzle(client, { schema });
+export const db = drizzle(client, { schema })