chore: 提交所有工作进度 — SaaS 后端增强、Admin UI、桌面端集成

包含大量 SaaS 平台改进、Admin 管理后台更新、桌面端集成完善、
文档同步、测试文件重构等内容。为 QA 测试准备干净工作树。

desktop/src-tauri/src/viking_commands.rs

@@ -392,7 +392,8 @@ pub async fn viking_remove(uri: String) -> Result<(), String> {
 
 /// Get memory tree
 #[tauri::command]
-pub async fn viking_tree(path: String, _depth: Option<usize>) -> Result<serde_json::Value, String> {
+pub async fn viking_tree(path: String, depth: Option<usize>) -> Result<serde_json::Value, String> {
+    let max_depth = depth.unwrap_or(5);
     let storage = get_storage().await?;
 
     let entries = storage
@@ -405,9 +406,13 @@ pub async fn viking_tree(path: String, _depth: Option<usize>) -> Result<serde_js
 
     for entry in entries {
         let parts: Vec<&str> = entry.uri.split('/').collect();
+        let level = parts.len().saturating_sub(1);
+        if level > max_depth {
+            continue;
+        }
         let mut current = &mut tree;
 
-        for part in &parts[..parts.len().saturating_sub(1)] {
+        for part in &parts[..level] {
             if !current.contains_key(*part) {
                 current.insert(
                     (*part).to_string(),