fix(images): cache Telegram photos by unique_id and pass base64 to LLM commands

Stop reading image files inside gemini/mistral commands; use pre-encoded image data from message parts

Rework loadImagesIfExists / loadImagesFromFileIds to return cached file_unique_ids and download only missing sizes

Encode cached images to base64 when assembling the reply chain

Make getPhotoMaxSize synchronous (returns PhotoSize), and map to URL only when needed

Await MessageStore.put / UserStore.put and prefetch single-image downloads on message receipt

src/common/message-store.ts

@@ -1,6 +1,6 @@
 import {StoredMessage} from "../model/stored-message";
 import {Message} from "typescript-telegram-bot-api";
-import {extractTextMessage, isStoredMessage} from "../util/utils";
+import {extractTextMessage, getPhotoMaxSize, isStoredMessage} from "../util/utils";
 import {messageDao} from "../index";
 
 export class MessageStore {
@@ -22,6 +22,7 @@ export class MessageStore {
             fromId: m.from.id,
             text: extractTextMessage(m),
             date: m.date ?? 0,
+            photoMaxSizeFilePath: m.photo ? [getPhotoMaxSize(m.photo).file_unique_id] : null
         };
 
         this.map.set(this.key(msg.chatId, msg.id), msg);

src/common/user-store.ts

@@ -9,7 +9,7 @@ export class UserStore {
         return this.map;
     }
 
-    static async put(u: User) {
+    static async put(u: User): Promise<StoredUser> {
         const user: StoredUser = {
             id: u.id,
             isBot: u.is_bot,
@@ -22,6 +22,7 @@ export class UserStore {
         this.map.set(u.id, user);
 
         await userDao.insert(userDao.mapTo([u]));
+        return user;
     }
 
     static async get(id: number): Promise<StoredUser | null> {