docs: fix threading module documentation discrepancies

- Fix include paths: use #include "Threading/..." instead of <XCEngine/Threading/...>
- Document protected ITask constructors (ITask(), ITask(TaskPriority))
- Document Callback typedef in TaskGroup
- Clarify Mutex STL-compatible methods are const
- Note GetProgress() implementation limitation (returns 0.0f)

docs/api/containers/array/array.md

@@ -71,13 +71,13 @@
 #include <XCEngine/Containers/Array.h>
 
 // 基本用法
-Containers::Array<int> arr;
+XCEngine::Containers::Array<int> arr;
 arr.PushBack(1);
 arr.PushBack(2);
 arr.PushBack(3);
 
 // 使用 initializer_list
-Containers::Array<int> arr2 = {1, 2, 3, 4, 5};
+XCEngine::Containers::Array<int> arr2 = {1, 2, 3, 4, 5};
 
 // 迭代
 for (auto& elem : arr) {

docs/api/containers/containers.md

@@ -30,21 +30,23 @@ Containers 模块提供了图形引擎常用的数据结构，包括动态数组
 ## 使用示例
 
 ```cpp
-#include <XCEngine/Containers/Containers.h>
+#include <XCEngine/Containers/Array.h>
+#include <XCEngine/Containers/String.h>
+#include <XCEngine/Containers/HashMap.h>
 
 // 使用 Array
-Containers::Array<int> arr;
+XCEngine::Containers::Array<int> arr;
 arr.PushBack(1);
 arr.PushBack(2);
 arr.PushBack(3);
 
 // 使用 String
-Containers::String str;
+XCEngine::Containers::String str;
 str = "Hello, ";
 str += "World!";
 
 // 使用 HashMap
-Containers::HashMap<Containers::String, int> map;
+XCEngine::Containers::HashMap<XCEngine::Containers::String, int> map;
 map.Insert("key1", 100);
 map.Insert("key2", 200);
 int* value = map.Find("key1");

docs/api/containers/string/size.md

@@ -1,7 +1,8 @@
-# String::Length / Capacity / Empty
+# String::Length / Size / Capacity / Empty
 
 ```cpp
 SizeType Length() const;
+SizeType Size() const;
 SizeType Capacity() const;
 bool Empty() const;
 ```
@@ -12,6 +13,7 @@ bool Empty() const;
 
 **返回：**
 - `Length()` - 返回字符串的字符数（不包括终止 null 字符）
+- `Size()` - 与 `Length()` 功能相同，返回字符串的字符数
 - `Capacity()` - 返回已分配的存储容量
 - `Empty()` - 如果字符串为空则返回 `true`
 
@@ -28,6 +30,7 @@ int main() {
 
     XCEngine::Containers::String s2("Hello");
     std::cout << "Length: " << s2.Length() << std::endl;      // 输出: Length: 5
+    std::cout << "Size: " << s2.Size() << std::endl;        // 输出: Size: 5
     std::cout << "Capacity: " << s2.Capacity() << std::endl;  // 输出: Capacity: 6 或更大
 
     s2.Reserve(100);

docs/api/containers/string/string.md

@@ -62,7 +62,7 @@
 | 方法 | 描述 |
 |------|------|
 | [CStr](cstr.md) | 获取 C 字符串指针 |
-| [Length/Capacity/Empty](size.md) | 获取尺寸信息 |
+| [Length/Size/Capacity/Empty](size.md) | 获取尺寸信息 |
 | [operator[]](./operator-subscript.md) | 下标访问 |
 
 ### 容量管理

docs/api/containers/string/trim.md

@@ -4,7 +4,7 @@
 String Trim() const;
 ```
 
-移除字符串两端的空白字符（包括空格、制表符、换行符等 isspace 识别的字符），返回一个新的 String 对象，原字符串不变。
+移除字符串两端的空白字符（空格、制表符、换行符、回车符），返回一个新的 String 对象，原字符串不变。
 
 **参数：** 无
 
@@ -24,7 +24,7 @@ int main() {
     std::cout << "\"" << trimmed.CStr() << "\"" << std::endl;  // 输出: "Hello World"
 
     XCEngine::Containers::String s2("\t\n  test  \t\n");
-    std::cout << "\"" << s2.Trim().CStr() << "\"" << std::endl;  // 输出: "test"
+    std::cout << "\"" << s2.Trim().CStr() << "\"" << std::endl;  // 输出: "test" (空格、制表符、换行、回车被移除)
 
     return 0;
 }