Flow-response cards and warmer Italian replies

Fixed

• WhatsApp Flow submissions now render as an orange Flow Response bubble with explicit question and answer rows instead of leaving operators with only the Meta Sent placeholder.
• Older Flow replies whose message payloads are missing redacted answers can hydrate from the canonical Flow event store at read time, backed by a workspace/event/message index and without exposing raw Flow JSON.
• Customer-response prompts now explicitly ask for casual, concise Italian WhatsApp wording so SwitchBot drafts feel less wooden.