feat(usage): refine usage dashboard UI and date range picker

src-tauri/src/commands/usage.rs

@@ -35,18 +35,26 @@ pub fn get_usage_trends(
 #[tauri::command]
 pub fn get_provider_stats(
     state: State<'_, AppState>,
+    start_date: Option<i64>,
+    end_date: Option<i64>,
     app_type: Option<String>,
 ) -> Result<Vec<ProviderStats>, AppError> {
-    state.db.get_provider_stats(app_type.as_deref())
+    state
+        .db
+        .get_provider_stats(start_date, end_date, app_type.as_deref())
 }
 
 /// 获取模型统计
 #[tauri::command]
 pub fn get_model_stats(
     state: State<'_, AppState>,
+    start_date: Option<i64>,
+    end_date: Option<i64>,
     app_type: Option<String>,
 ) -> Result<Vec<ModelStats>, AppError> {
-    state.db.get_model_stats(app_type.as_deref())
+    state
+        .db
+        .get_model_stats(start_date, end_date, app_type.as_deref())
 }
 
 /// 获取请求日志列表