fix: 修复多个UI框架问题

- 修复 InspectorPanel InputText 使用 data()/capacity() 的错误
- 修复未使用变量警告
- 修复 ProjectManager 路径重复拼接 bug (Assets/Assets)
- 返回按钮在 Assets 目录时禁用但保持显示
- 删除 ProjectPanel 创建按钮，调整 Refresh 位置
- 修复 ProjectPanel 搜索过滤时的 ID 冲突
- 修复 InspectorPanel CollapsingHeader ID 冲突

ui/src/Managers/ProjectManager.cpp

@@ -34,10 +34,10 @@ void ProjectManager::NavigateBack() {
 }
 
 std::string ProjectManager::GetCurrentPath() const {
-    if (m_path.empty()) return "";
-    std::string result;
-    for (size_t i = 0; i < m_path.size(); i++) {
-        if (i > 0) result += "/";
+    if (m_path.empty()) return "Assets";
+    std::string result = "Assets";
+    for (size_t i = 1; i < m_path.size(); i++) {
+        result += "/";
         result += m_path[i]->name;
     }
     return result;
@@ -99,8 +99,10 @@ void ProjectManager::Initialize(const std::string& projectPath) {
 }
 
 std::wstring ProjectManager::GetCurrentFullPathW() const {
+    if (m_path.empty()) return Utf8ToWstring(m_projectPath);
+    
     std::wstring fullPath = Utf8ToWstring(m_projectPath);
-    for (size_t i = 0; i < m_path.size(); i++) {
+    for (size_t i = 1; i < m_path.size(); i++) {
         fullPath += L"/" + Utf8ToWstring(m_path[i]->name);
     }
     return fullPath;