[FR] Provide the prompt that goes at the end.

[wwjCMP]

Is your feature request related to a problem? Please describe.

Since Vault QA mode uses English prompts, even if the system prompt requires responses in a specific language, some models will still use English.

Describe the solution you'd like

Provide presets for the post-prompt to control the output format and language in the last step.

Describe alternatives you've considered

Additional context