fix(security): resolve critical buffer overflow and workflow permissions issues

.github/workflows/update-mihomo.yml

@@ -13,6 +13,9 @@ on:
 jobs:
   update-mihomo:
     runs-on: ubuntu-latest
+    permissions:
+      contents: write  # Required for git push
+      pull-requests: write  # Required for potential PR creation
     steps:
       - name: Checkout code
         uses: actions/checkout@v4

src/main.cpp

@@ -33,7 +33,7 @@ void SetConsoleTitle(const std::string &title) {
 #endif // _WIN32
 
 void setcd(std::string &file) {
-  char szTemp[1024] = {}, filename[256] = {};
+  char szTemp[4096] = {}, filename[256] = {};
   std::string path;
 #ifdef _WIN32
   char *pname = NULL;