feat: unify provider reaction tools

src/web/inbound.ts

@@ -558,6 +558,30 @@ export async function monitorWebInbox(options: {
       });
       return { messageId: result?.key?.id ?? "unknown" };
     },
+    /**
+     * Send a reaction (emoji) to a specific message.
+     * Pass an empty string for emoji to remove the reaction.
+     */
+    sendReaction: async (
+      chatJid: string,
+      messageId: string,
+      emoji: string,
+      fromMe: boolean,
+      participant?: string,
+    ): Promise<void> => {
+      const jid = toWhatsappJid(chatJid);
+      await sock.sendMessage(jid, {
+        react: {
+          text: emoji,
+          key: {
+            remoteJid: jid,
+            id: messageId,
+            fromMe,
+            participant,
+          },
+        },
+      });
+    },
     /**
      * Send typing indicator ("composing") to a chat.
      * Used after IPC send to show more messages are coming.