Remove unused dependencies and dead code, refresh AGENTS.md

- Drop unused email module and media text extraction path
- Remove 12 unused dependencies
- Remove unused imports in server.ts
- Add typecheck and test scripts
- Rewrite AGENTS.md to describe this project

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

src/functions/backend/db/users/media/upload-and-record-media.ts

@@ -17,7 +17,6 @@ import BunSQLite from "@moduletrace/bun-sqlite";
 import { existsSync, mkdirSync } from "fs";
 import path from "path";
 import sharp from "sharp";
-import fileToText from "./file-to-text";
 import MediaDataToArrayBuffer from "./media-data-to-array-buffer";
 import sniffMediaExtension from "./sniff-media-ext";
 import mediaDataToSharpInput from "./meida-data-to-sharp-input";
@@ -31,7 +30,6 @@ type Params = {
     data?: MediaDataType;
     is_primary?: boolean;
     update_on_duplicate?: boolean;
-    extract_media_text_content?: boolean;
     media?: BUN_SQLITE_WGUI_MEDIA;
     media_name?: string;
     media_mime_type?: string;
@@ -50,7 +48,6 @@ export default async function uploadAndRecordMedia({
     media_type,
     is_primary,
     update_on_duplicate,
-    extract_media_text_content,
     media,
     media_mime_type,
     media_name,
@@ -189,17 +186,6 @@ export default async function uploadAndRecordMedia({
         await Bun.write(media_write_path_full, media_array_buffer, {
             mode: 1,
         });
-
-        if (extract_media_text_content) {
-            const media_text = await fileToText({
-                file_type: media_ext,
-                file_stream: Buffer.from(media_array_buffer),
-            });
-
-            if (media_text) {
-                media_text_content = media_text;
-            }
-        }
     }
 
     if (existsSync(media_write_path_full)) {