im_webapp/web/src/lib/config.ts

// Ported from the previous im_webapp's src/config.js. These values encode real constraints that
// must match the backend (server/*.go) -- they are not stylistic choices, so the numbers/strings
// themselves carry over unchanged even though this is a from-scratch rewrite.

/** Version-independent product name (Firebase app name, in-app copy, etc.). */
export const BASE_APP_NAME = 'MeetingIM';

/** Name used in the Tinode client's User-Agent string. */
export const APP_NAME = `${BASE_APP_NAME}/${__APP_VERSION__}`;

/**
 * Tinode API key for the WS handshake ({hi} packet) and every REST call's X-MeetingIM-APIKey
 * header. Generated with https://github.com/tinode/chat/tree/master/keygen against this
 * deployment's own API_KEY_SALT -- the fallback below only works against a backend still using
 * the upstream sample salt, same caveat as the old app.
 */
export const API_KEY = import.meta.env.VITE_TINODE_API_KEY || 'AQEAAAABAAD_rAp4DJh05a1HAwFT3A6K';

export const KNOWN_HOSTS = { hosted: 'web.118im.com', local: 'localhost:6060' } as const;
export const DEFAULT_HOST = KNOWN_HOSTS.hosted;

// Tinode's own verbose logging prints every WS packet to the console, including the login
// secret (base64 username:password) and full plaintext message content -- dev-only, never in a
// production build.
export const LOGGING_ENABLED = import.meta.env.DEV;

/** Minimum time between two keypress notifications, ms. */
export const KEYPRESS_DELAY = 3_000;
/** Delay before sending a read notification, ms. */
export const READ_DELAY = 1_500;

export const MIN_TAG_LENGTH = 2;
export const MAX_TAG_LENGTH = 96;
export const MAX_TAG_COUNT = 16;

export const DEFAULT_P2P_ACCESS_MODE = 'JRWPS';
export const NEW_GRP_ACCESS_MODE = 'JRWPSAO';
export const CHANNEL_ACCESS_MODE = 'JR';
export const NO_ACCESS_MODE = 'N';

/** Design breakpoints, px. Four tiers per the new design handoff (was a single 640 cut before). */
export const BREAKPOINTS = { sm: 640, md: 960, lg: 1280 } as const;

export const AVATAR_SIZE = 384;
export const MAX_AVATAR_BYTES = 4096;
export const BROKEN_IMAGE_SIZE = 32;
export const NO_DIMENSIONS_VIDEO = 128;

export const MESSAGES_PAGE = 24;
/** Scroll-to-top threshold (px) that triggers loading an older page of history. */
export const FETCH_PAGE_TRIGGER = 40;
/** Poll interval (ms) for the throttled read-receipt queue. */
export const NOTIFICATION_EXEC_INTERVAL = 300;

export const MAX_INBAND_ATTACHMENT_SIZE = 262_144;
export const MAX_EXTERN_ATTACHMENT_SIZE = 1 << 23;
export const MAX_IMAGE_DIM = 1024;
export const IMAGE_PREVIEW_DIM = 64;
export const VIDEO_PREVIEW_DIM = 96;
export const IMAGE_THUMBNAIL_DIM = 36;
export const VIDEO_THUMBNAIL_WIDTH = 48;

export const MAX_ONLINE_IN_TOPIC = 4;
export const MAX_TITLE_LENGTH = 60;
/** docs/IM-前后端对接文档.md:1445 -- "description 可省略或传空字符串，最长 200 字符". */
export const MAX_TOPIC_DESCRIPTION_LENGTH = 200;
export const MAX_PEER_TITLE_LENGTH = 24;

export const MESSAGE_PREVIEW_LENGTH = 80;
export const QUOTED_REPLY_LENGTH = 30;
export const FORWARDED_PREVIEW_LENGTH = 84;
export const EDIT_PREVIEW_LENGTH = 48;

export const MIN_DURATION = 2_000;
export const MAX_DURATION = 600_000;

export const IMMEDIATE_P2P_SUBSCRIPTION = false;

export const CLICKABLE_URL_SCHEMES = ['http', 'https', 'ftp', 'ftps'];

export const QRCODE_SIZE = 128;

export const WAKE_UP_TIMEOUT = 80_000;
export const WAKE_UP_TICK = 1_000;

export const TOAST_DURATION = 2_500;