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/touch.md

@@ -0,0 +1,27 @@
+# ResourceCache::Touch
+
+```cpp
+void Touch(ResourceGUID guid)
+```
+
+更新资源的最近访问时间。当缓存条目被命中时调用，用于 LRU 驱逐算法判断资源的访问热度。
+
+**参数：**
+- `guid` - 资源全局唯一标识符
+
+**返回：** 无
+
+**复杂度：** O(1)
+
+**示例：**
+
+```cpp
+IResource* res = cache.Find(guid);
+if (res) {
+    cache.Touch(guid);  // 更新 LRU
+}
+```
+
+## 相关文档
+
+- [ResourceCache 总览](resourcecache.md) - 返回类总览