feat: 初始化项目基础架构和核心功能

- 添加项目基础结构：Cargo.toml、.gitignore、设备UID和密钥文件
- 实现前端Vue3项目结构：路由、登录页面、设备管理页面
- 添加核心协议定义(crates/protocol)：设备状态、资产、USB事件等
- 实现客户端监控模块：系统状态收集、资产收集
- 实现服务端基础API和插件系统
- 添加数据库迁移脚本：设备管理、资产跟踪、告警系统等
- 实现前端设备状态展示和基本交互
- 添加使用时长统计和水印功能插件

migrations/007_plugins_software_blocker.sql

@@ -0,0 +1,24 @@
+-- 007_plugins_software_blocker.sql: Software Blocker plugin (软件禁止安装)
+
+CREATE TABLE IF NOT EXISTS software_blacklist (
+    id              INTEGER PRIMARY KEY AUTOINCREMENT,
+    name_pattern    TEXT NOT NULL,
+    category        TEXT CHECK(category IN ('game', 'social', 'vpn', 'mining', 'custom')),
+    action          TEXT NOT NULL DEFAULT 'block' CHECK(action IN ('block', 'alert')),
+    target_type     TEXT NOT NULL DEFAULT 'global' CHECK(target_type IN ('global', 'group', 'device')),
+    target_id       TEXT,
+    enabled         INTEGER NOT NULL DEFAULT 1,
+    created_at      TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE TABLE IF NOT EXISTS software_violations (
+    id              INTEGER PRIMARY KEY AUTOINCREMENT,
+    device_uid      TEXT NOT NULL REFERENCES devices(device_uid) ON DELETE CASCADE,
+    software_name   TEXT NOT NULL,
+    action_taken    TEXT NOT NULL CHECK(action_taken IN ('blocked_install', 'auto_uninstalled', 'alerted')),
+    timestamp       TEXT NOT NULL DEFAULT (datetime('now'))
+);
+
+CREATE INDEX IF NOT EXISTS idx_software_blacklist_enabled ON software_blacklist(enabled);
+CREATE INDEX IF NOT EXISTS idx_software_violations_device ON software_violations(device_uid, timestamp);
+CREATE INDEX IF NOT EXISTS idx_software_violations_time ON software_violations(timestamp);