User manual (docs/MANUAL.md) and refreshed in-app help

README.md

@@ -102,6 +102,11 @@ Linux, macOS arm64 and Windows):
 - **cli_smoke** (`tests/cli_smoke.cmake`): drives the `msxforge` binary end to
   end on a freshly formatted disk.
 
+## User manual
+
+A complete user manual (in Spanish) — GUI, every CLI command, hard disk / SD
+images, recipes and troubleshooting — is in [`docs/MANUAL.md`](docs/MANUAL.md).
+
 ## CLI usage
 
 Every `<FILE>` may be a path into subdirectories (`GAMES/SAVE/SLOT1.DAT`),

cli/main.cpp

@@ -388,8 +388,9 @@ static int cmd_add(int argc, char** argv) {
     std::string err;
     if (!fs.createFile(dir, name, data, &err)) { fprintf(stderr, "add: %s\n", err.c_str()); return 6; }
     if (!dk.save(argv[2], &err)) { fprintf(stderr, "save: %s\n", err.c_str()); return 7; }
-    printf("added %s (%zu bytes) as %s%s\n", argv[3], data.size(),
-           dir.c_str(), name.c_str());
+    std::string where = dir;
+    if (where.empty() || (where.back() != '/' && where.back() != '\\')) where += "/";
+    printf("added %s (%zu bytes) as %s%s\n", argv[3], data.size(), where.c_str(), name.c_str());
     return 0;
 }