feat(messaging-ui): Attachment carries contentRef + sizeBytes for messenger media (0.1.4)

Extend the messaging Attachment type with optional storage fields so an adapter's
upload() can return a sendable reference (the socket needs contentRef/mimeType/
sizeBytes to persist the message part) while keeping the display url. Enables
messenger attachments end-to-end in host adapters.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

packages/iios-messaging-ui/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@insignia/iios-messaging-ui",
-  "version": "0.1.3",
+  "version": "0.1.4",
   "type": "module",
   "main": "dist/index.js",
   "module": "dist/index.js",

packages/iios-messaging-ui/src/types.ts

@@ -48,9 +48,13 @@ export interface Reaction {
 }
 
 export interface Attachment {
+  /** A resolved URL for display/download. May be empty until resolved by the host. */
   url: string;
   mime: string;
   name: string;
+  /** Storage reference — carried so send() can persist the message part (upload returns it). */
+  contentRef?: string;
+  sizeBytes?: number;
 }
 
 export interface Message {