feat: Library 批量注册 + PeopleView 修复 + 国际化

Library:
- 添加 checkbox 和鼠标框选功能
- Unregistered 卡片添加快速注册按钮
- 状态标签移至左下方，人脸图标移至左侧中间
- Deep Scan 改为 unregister -> register -> process
- 完整国际化（日语、繁体中文、英语）

PeopleView:
- 修复卡片不显示问题（使用 get_file_traces API）
- 移除对 identity_id 字段的依赖

其他:
- 添加日语语言包
- 添加 useDragSelect composable
- 新增文档：Face Bbox Null Bug Report

src-tauri/src/bin/proxy.rs

@@ -4,6 +4,40 @@ mod proxy;
 #[path = "../db.rs"]
 mod db;
 
+#[path = "../validate.rs"]
+mod validate;
+
+#[derive(serde::Serialize, serde::Deserialize)]
+pub struct SystemStatsResponse {
+    pub cpu_used_percent: f64,
+    pub memory_used_percent: f64,
+    pub memory_available_mb: u64,
+    pub memory_total_mb: u64,
+    pub swap_used_percent: f64,
+    pub swap_available_mb: u64,
+    pub swap_total_mb: u64,
+    pub gpu_available: bool,
+    pub gpu_utilization: Option<f64>,
+    pub gpu_memory_used_pct: Option<f64>,
+    pub ane_available: bool,
+    pub ane_utilization: Option<f64>,
+    pub source: String,
+    pub chip_name: Option<String>,
+    pub cpu_power: Option<f64>,
+    pub gpu_power: Option<f64>,
+    pub ane_power: Option<f64>,
+    pub sys_power: Option<f64>,
+    pub ram_power: Option<f64>,
+    pub cpu_temp: Option<f64>,
+    pub gpu_temp: Option<f64>,
+    pub ecpu_freq_mhz: Option<u32>,
+    pub pcpu_freq_mhz: Option<u32>,
+    pub gpu_freq_mhz: Option<u32>,
+    pub ecpu_cores: Option<u8>,
+    pub pcpu_cores: Option<u8>,
+    pub gpu_cores: Option<u8>,
+}
+
 #[tokio::main]
 async fn main() {
     let _ = db::init_db();