Implement lazy email reply loading states

Author: zhmzm

packages/server/src/index.ts

@@ -711,6 +711,11 @@ function buildActionSummary(result: Record<string, unknown>): string {
       : []
     lines.push(`- User requested more emails${requestedCategories.length > 0 ? ` for categories: ${requestedCategories.join(', ')}` : ''}.`)
   }
+  if (result.requestReplyDraft) {
+    const emailSubject = typeof result.emailSubject === 'string' ? result.emailSubject : ''
+    const emailId = typeof result.emailId === 'string' ? result.emailId : ''
+    lines.push(`- User requested a reply draft${emailSubject ? ` for "${emailSubject}"` : emailId ? ` for ${emailId}` : ''}.`)
+  }
 
   const intents = (result.selectedIntents ?? []) as Array<{ id: string; accepted: boolean }>
   if (intents.length > 0) {

packages/web/src/pages/EmailTestPage.tsx

@@ -26,6 +26,7 @@ Acme Cloud Billing`,
         { label: 'Thread', value: 'March Billing Summary' },
       ],
       unread: true,
+      replyState: 'loading',
       category: 'Updates',
       timestamp: Date.now() - 1000 * 60 * 45,
     },
@@ -71,6 +72,8 @@ Mina`,
         { label: 'Priority', value: 'High' },
       ],
       unread: true,
+      replyState: 'ready',
+      replyUnread: true,
       replyDraft: {
         replyTo: 'mina@example.com',
         to: 'mina@example.com',