Add the harness, envs, per-bot models and chat attachments

- Harness: providers, model catalog synced hourly, automatic free picks,
  cooldowns, tool loop with context trimming, MCP computer tools
- Bots queue runs replies and tasks through the harness; jobs wait
  (attempt refunded) while every model is resting
- Envs: Settings > Environment, scoped general/workspace/computer,
  written to computers and redacted from tool output
- Models: Settings > Models, per-harness provider select defaulting to
  OpenRouter, and a models modal on each bot's chat (the coordinator's
  edits the defaults)
- Chat: thinking row while a reply runs, file attachments (upload,
  paste, drop) that replies read as images, audio and document text
- Fix media uploads failing after a user's first file, and private
  files being served from the public media path

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

src/pages/admin/bots/[bot_id]/(utils)/group-messages.ts

@@ -1,9 +1,9 @@
-import type { BUN_SQLITE_COBBLE_BOT_MESSAGES } from "@/db/types/db";
+import type { BotMessageWithAttachments } from "@/src/types";
 
 export type MessageGroup = {
     key: string;
     author: "bot" | "user";
-    messages: BUN_SQLITE_COBBLE_BOT_MESSAGES[];
+    messages: BotMessageWithAttachments[];
     /**
      * Time of the group's last message, shown once per group.
      */
@@ -11,7 +11,7 @@ export type MessageGroup = {
 };
 
 type Params = {
-    messages: BUN_SQLITE_COBBLE_BOT_MESSAGES[];
+    messages: BotMessageWithAttachments[];
     /**
      * Consecutive messages from one author within this gap share a group.
      */