added esc support on nvim terminal, fix debugger crash and alpha problem

lua/plugins/debugger.lua

@@ -178,9 +178,12 @@ return {
             id = "cppdbg",
             type = "executable",
             command = cpptools_path,
-            -- For Windows subprocess tracking stability
+            -- Must stay detached (the default) so the adapter + gdb + debuggee
+            -- run in their own process group. With detached=false on Windows
+            -- they share Neovim's console group, so terminating the session
+            -- (dap.terminate) sends the Ctrl-C/terminate signal to Neovim too.
             options = {
-                detached = not is_windows,
+                detached = true,
             },
         }