feat(bots): bot framework polish + store

- /ws/bot endpoint: bot token auth via query param, SHA-256 lookup
- Bot WS actions: SEND_MESSAGE + DELETE_MESSAGE handled in gateway
- Bot messages: bot_id on messages table, bot badge in chat (green + BOT tag)
- Bot store: /bots lists all bots with server count + add-to-server
- Bot manager moved to /bots/manage
- Fix: command routes were double-nested under /bots/{botID}/commands
- Fix: fetchServerCommands route corrected to /bots/servers/...

web/src/stores/message.ts

@@ -38,6 +38,9 @@ export interface Message {
   author_id: string;
   author_username: string;
   author_display_name: string | null;
+  author_bot?: boolean;
+  bot_id?: string | null;
+  bot_name?: string | null;
   content: string;
   reply_to?: string | null;
   embeds?: MessageEmbed[];