Summary

• keep the case chat draft state until the user submits the first message and only persist a session when needed
• route the draft session through the chat body with new flags so the UI shows a pre-send placeholder and handles pending messages safely
• adjust chat session pane handling for optional chat data and pending message tracking to avoid double sends

Testing

• Not run (not requested)

Summary by cubic

Delay case chat session creation until the first message is sent, keeping a draft state in the UI and safely sending the initial message once the session exists. Non-case entities keep the existing auto-create behavior.

• New Features

  • Case chats start as drafts; the session is created on first send via onBeforeSend.
  • Draft UI shows a pre-send placeholder and disables input while creating.
  • Tracks the first pending message and auto-sends it after creation.
  • Preserves auto-create for non-case entities; case chats no longer auto-create on open.
  • Shows a toast with parsed errors if chat creation fails.

• Bug Fixes

  • Prevents double-sending the first message with per-chat message keys.
  • Avoids rendering tools when no chat exists.
  • Cleans up loading states and error handling in ChatBody.

^{Written for commit 852e886. Summary will update on new commits.}