feat: add support for marking emails as answered or forwarded and update UI accordingly

lib/jmap/client-interface.ts

@@ -72,6 +72,7 @@ export interface IJMAPClient {
   batchMarkAsRead(emailIds: string[], read?: boolean): Promise<void>;
   toggleStar(emailId: string, starred: boolean): Promise<void>;
   updateEmailKeywords(emailId: string, keywords: Record<string, boolean>): Promise<void>;
+  setKeyword(emailId: string, keyword: string): Promise<void>;
   migrateKeyword(oldKeyword: string, newKeyword: string): Promise<number>;
   deleteEmail(emailId: string): Promise<void>;
   moveToTrash(emailId: string, trashMailboxId: string, accountId?: string): Promise<void>;

lib/jmap/client.ts

@@ -763,6 +763,19 @@ export class JMAPClient implements IJMAPClient {
     ]);
   }
 
+  async setKeyword(emailId: string, keyword: string): Promise<void> {
+    await this.request([
+      ["Email/set", {
+        accountId: this.accountId,
+        update: {
+          [emailId]: {
+            [`keywords/${keyword}`]: true,
+          },
+        },
+      }, "0"],
+    ]);
+  }
+
   async migrateKeyword(oldKeyword: string, newKeyword: string): Promise<number> {
     // Query all email IDs that have the old keyword
     const allIds: string[] = [];

lib/jmap/types.ts

@@ -142,6 +142,8 @@ export interface ThreadGroup {
   hasUnread: boolean;        // Any unread emails in thread
   hasStarred: boolean;       // Any starred emails in thread
   hasAttachment: boolean;    // Any email has attachment
+  hasAnswered: boolean;      // Any email has been replied to
+  hasForwarded: boolean;     // Any email has been forwarded
   emailCount: number;        // Total emails in thread
 }