Add replies and emoji reactions to chat messages

Every message has a row under it to reply or react. Replying quotes the
message above the composer, and the sent message stores
reply_to_message_id (a plain id, not a foreign key, so deleting the
quoted message only drops the quote). send-message accepts a quote from
any session of the same conversation, so a rollover or a thread that
moved on still sends; the conversation drops a picked quote when its
session changes. The bot reads the quote as "[Replying to ...]" before
the user's turn, file-only replies included, and relayed messages carry
it too.

Reactions are a fixed set (BotMessageReactions) in
bot_message_reactions, one per message, emoji and user or bot. Users
toggle their own through api/admin/bots/react-message, and every bot
gets react_to_message for the session it answers (the user's latest
message by default). Both push the fresh list as server:bot-reaction,
with mine worked out for the session's user.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/functions/backend/db/bots/grab-bot-messages.ts

@@ -2,19 +2,28 @@ import type { BUN_SQLITE_COBBLE_BOT_MESSAGES } from "@/db/types/db";
 import type { BotMessageWithAttachments } from "@/src/types";
 import BunSQLite from "@moduletrace/bun-sqlite";
 import grabMessagesMedia from "./grab-messages-media";
+import grabMessagesReactions from "./grab-messages-reactions";
+import grabMessagesReplies from "./grab-messages-replies";
 import mediaToAttachment from "./media-to-attachment";
 
 type Params = {
     session_id: number | string;
     limit?: number;
+    /**
+     * Whose conversation it is, so a reaction can show as the user's own.
+     * Left out for the bot's own history reads, which don't need it.
+     */
+    user_id?: number | string;
 };
 
 /**
- * The latest messages of a session, oldest first, with their attachments.
+ * The latest messages of a session, oldest first, with their attachments,
+ * what each replies to, and (when `user_id` is given) its reactions.
  */
 export default async function grabBotMessages({
     session_id,
     limit = 100,
+    user_id,
 }: Params): Promise<BotMessageWithAttachments[]> {
     let sql = ``;
 
@@ -31,15 +40,28 @@ export default async function grabBotMessages({
     });
 
     const messages = res.payload || [];
-    const media = await grabMessagesMedia({
-        message_ids: messages.map((message) => Number(message.id)),
-    });
+    const message_ids = messages.map((message) => Number(message.id));
+
+    const [media, replies, reactions] = await Promise.all([
+        grabMessagesMedia({ message_ids }),
+        grabMessagesReplies({ message_ids }),
+        user_id
+            ? grabMessagesReactions({ message_ids, user_id })
+            : Promise.resolve(new Map()),
+    ]);
 
     return messages.map((message) => {
-        const files = media.get(Number(message.id));
+        const id = Number(message.id);
+        const files = media.get(id);
+        const reply_to = replies.get(id);
 
-        return files
-            ? { ...message, attachments: files.map((file) => mediaToAttachment({ media: file })) }
-            : message;
+        return {
+            ...message,
+            ...(files
+                ? { attachments: files.map((file) => mediaToAttachment({ media: file })) }
+                : {}),
+            ...(reply_to ? { reply_to } : {}),
+            ...(user_id ? { reactions: reactions.get(id) || [] } : {}),
+        };
     });
 }