fix: fix VFS Delete op for Ramdisk driver

kernel/src/Fs/Ramdisk.cpp

@@ -374,25 +374,41 @@ namespace Fs::Ramdisk {
 
     int Delete(const char* path) {
         if (path == nullptr) return -1;
-        if (path[0] == '/') path++;
+
+        int idx = FindEntryByPath(path);
+        if (idx < 0) return -1;
+
+        // For directories, refuse if any other entry lives under this prefix.
+        if (fileTable[idx].isDirectory) {
+            char normalized[MaxNameLen];
+            int normLen = NormalizePath(path, normalized, MaxNameLen);
+            if (normLen < 0) return -1;
+            if (normLen + 1 >= MaxNameLen) return -1;
+            normalized[normLen] = '/';
+            normalized[normLen + 1] = '\0';
 
             for (int i = 0; i < fileCount; i++) {
-            if (StrEqual(fileTable[i].name, path)) {
+                if (i == idx) continue;
-                // Free heap-allocated data
+                const char* name = fileTable[i].name;
-                if (fileTable[i].heapAllocated && fileTable[i].data) {
+                if (name[0] == '/') name++;
-                    Memory::g_heap->Free(fileTable[i].data);
+                bool prefixMatch = true;
+                for (int k = 0; k <= normLen; k++) {
+                    if (name[k] != normalized[k]) { prefixMatch = false; break; }
+                }
+                if (prefixMatch && name[normLen + 1] != '\0') return -1;
+            }
         }
 
-                // Shift remaining entries down
+        if (fileTable[idx].heapAllocated && fileTable[idx].data) {
-                for (int j = i; j < fileCount - 1; j++) {
+            Memory::g_heap->Free(fileTable[idx].data);
+        }
+
+        for (int j = idx; j < fileCount - 1; j++) {
             fileTable[j] = fileTable[j + 1];
         }
         fileCount--;
         return 0;
     }
-        }
-        return -1;  // not found
-    }
 
     int Mkdir(const char* path) {
         if (path == nullptr) return -1;

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

@@ -108,15 +108,16 @@ void filemanager_finish_rename(FileManagerState* fm) {
     filemanager_build_fullpath(new_path, 512,
                                fm->current_path, fm->rename_buf);
 
+    if (montauk::frename(old_path, new_path) != 0) {
+        // Fall back to copy + delete for drivers that don't support rename
         if (fm->is_dir[fm->rename_idx]) {
-        // Directory rename: copy recursively then delete old
             if (filemanager_copy_dir_recursive(old_path, new_path))
                 filemanager_delete_recursive(old_path);
         } else {
-        // File rename: copy then delete old
             if (filemanager_copy_file(old_path, new_path))
                 montauk::fdelete(old_path);
         }
+    }
 
     filemanager_read_dir(fm);
 }