fix: various bug fixes in desktop components

programs/src/desktop/apps/filemanager/actions.cpp

@@ -8,6 +8,19 @@
 
 namespace filemanager {
 
+static bool path_is_same_or_descendant(const char* path, const char* root) {
+    if (!path || !root) return false;
+
+    int root_len = montauk::slen(root);
+    while (root_len > 0 && root[root_len - 1] == '/') root_len--;
+    if (root_len <= 0) return false;
+
+    for (int i = 0; i < root_len; i++) {
+        if (path[i] == '\0' || path[i] != root[i]) return false;
+    }
+    return path[root_len] == '\0' || path[root_len] == '/';
+}
+
 void filemanager_do_copy(FileManagerState* fm) {
     if (fm->selected < 0 || fm->selected >= fm->entry_count) return;
     if (filemanager_is_computer_view(fm) || filemanager_is_virtual_view(fm) ||
@@ -36,11 +49,13 @@ void filemanager_do_paste(FileManagerState* fm) {
     const char* basename = path_basename(fm->clipboard_path);
     char dst[512];
     filemanager_build_fullpath(dst, 512, fm->current_path, basename);
+    if (montauk::streq(dst, fm->clipboard_path)) return;
 
     // Check if source is a directory by trying to readdir it
     const char* probe[1];
     int probe_count = montauk::readdir(fm->clipboard_path, probe, 1);
     bool src_is_dir = (probe_count >= 0);
+    if (src_is_dir && path_is_same_or_descendant(dst, fm->clipboard_path)) return;
 
     bool ok;
     if (src_is_dir)