fix: improve doc link navigation and tree display
- Fix link resolution with proper relative/absolute path handling - Improve link styling with underline decoration - Hide leaf nodes from tree, only show directories - Fix log file path for packaged app
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docs/api/containers/string/operator-plus-assign.md
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43
docs/api/containers/string/operator-plus-assign.md
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# String::operator+=
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```cpp
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String& operator+=(const String& other);
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String& operator+=(const char* str);
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String& operator+=(char c);
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```
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将指定的内容追加到当前 String 的末尾。
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**参数:**
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- `other` - 要追加的 String 对象
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- `str` - 要追加的以 null 结尾的 C 字符串
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- `c` - 要追加的单个字符
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**返回:** `*this`,支持链式调用
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**复杂度:** O(n),其中 n 为被追加内容的长度。可能会触发重新分配,但均摊复杂度为 O(1)。
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**示例:**
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```cpp
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#include "XCEngine/Containers/String.h"
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#include <iostream>
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int main() {
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XCEngine::Containers::String s("Hello");
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s += XCEngine::Containers::String(" World"); // 追加 String
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std::cout << s.CStr() << std::endl; // 输出: Hello World
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s += "!"; // 追加 const char*
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std::cout << s.CStr() << std::endl; // 输出: Hello World!
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s += '?'; // 追加 char
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std::cout << s.CStr() << std::endl; // 输出: Hello World!?
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return 0;
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}
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```
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## 相关文档
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- [String 总览](string.md) - 返回类总览
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