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

docs/api/resources/resourcecache/onmemorypressure.md

@@ -0,0 +1,25 @@
+# ResourceCache::OnMemoryPressure
+
+```cpp
+void OnMemoryPressure(size_t requiredBytes)
+```
+
+内存压力回调。当系统内存紧张时调用此方法，从 LRU 列表头部开始驱逐资源，直到释放足够空间。
+
+**参数：**
+- `requiredBytes` - 需要释放的字节数
+
+**返回：** 无
+
+**复杂度：** O(n)
+
+**示例：**
+
+```cpp
+// 需要 100MB 空间
+cache.OnMemoryPressure(100 * 1024 * 1024);
+```
+
+## 相关文档
+
+- [ResourceCache 总览](resourcecache.md) - 返回类总览