feat: unify provider history context

src/auto-reply/templating.ts

@@ -13,9 +13,13 @@ export type MsgContext = {
   Body?: string;
   /**
    * Raw message body without structural context (history, sender labels).
-   * Used for command detection. Falls back to Body if not set.
+   * Legacy alias for CommandBody. Falls back to Body if not set.
    */
   RawBody?: string;
+  /**
+   * Prefer for command detection; RawBody is treated as legacy alias.
+   */
+  CommandBody?: string;
   From?: string;
   To?: string;
   SessionKey?: string;