feat: initial commit with accounts manager project structure

- TypeScript项目基础架构
- API路由和账户管理服务
- 数据库模式和迁移
- 基础配置文件和文档

🤖 Generated with [Claude Code](https://claude.ai/code)

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

drizzle/0000_initial_schema.sql

@@ -0,0 +1,16 @@
+CREATE TABLE IF NOT EXISTS "accounts" (
+	"id" serial PRIMARY KEY NOT NULL,
+	"owner_id" varchar(128) NOT NULL,
+	"platform" varchar(100) NOT NULL,
+	"custom_id" varchar(255) NOT NULL,
+	"data" text NOT NULL,
+	"status" varchar(50) NOT NULL,
+	"notes" text,
+	"locked_at" timestamp,
+	"created_at" timestamp DEFAULT now() NOT NULL,
+	"updated_at" timestamp DEFAULT now() NOT NULL
+);
+
+CREATE UNIQUE INDEX IF NOT EXISTS "platform_custom_id_idx" ON "accounts" ("platform","custom_id");
+CREATE INDEX IF NOT EXISTS "owner_id_status_idx" ON "accounts" ("owner_id","status");
+CREATE INDEX IF NOT EXISTS "platform_owner_idx" ON "accounts" ("platform","owner_id");