feat: submit slash command in one enter

extensions/cli/spec/shell-mode.md

@@ -27,6 +27,8 @@ Interaction with other input helpers
   - "/" slash command UI is disabled.
 - When in slash command mode (input starts with /):
   - "@" file search suggestions are disabled.
+  - Enter submits the highlighted slash command directly (except /title, which requires Tab to select first).
+  - Tab selects the highlighted command without submitting.
 
 Submission behavior
 

extensions/cli/src/ui/UserInput.tsx

@@ -463,7 +463,28 @@ const UserInput: React.FC<UserInputProps> = ({
 
     if ((key.return && !key.shift) || key.tab) {
       if (filteredCommands.length > 0) {
-        selectSlashCommand(filteredCommands[selectedCommandIndex].name);
+        const commandName = filteredCommands[selectedCommandIndex].name;
+        if (key.return && commandName !== "title") {
+          // select and submit the command
+          const commandText = "/" + commandName;
+          inputHistory.addEntry(commandText);
+
+          // queue up when responding/generating
+          if (!isRemoteMode && (isWaitingForResponse || isCompacting)) {
+            void messageQueue.enqueueMessage(commandText);
+          } else {
+            onSubmit(commandText);
+          }
+
+          // reset after submitting command
+          textBuffer.clear();
+          setInputText("");
+          setCursorPosition(0);
+          setShowSlashCommands(false);
+          setShowBashMode(false);
+        } else {
+          selectSlashCommand(commandName);
+        }
       }
       return true;
     }