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/harness/tools/bot/grab-bot-tools.ts

@@ -0,0 +1,19 @@
+import type { HarnessTool } from "../../types";
+import updateInstructionsTool from "./update-instructions-tool";
+import updateMemoryTool from "./update-memory-tool";
+
+type Params = {
+    user_id: number | string;
+    bot_id: number | string;
+};
+
+/**
+ * The tools a bot works with, bound to that bot. Computer, delegation and
+ * media tools join this list as they are built.
+ */
+export default function grabBotTools({ user_id, bot_id }: Params): HarnessTool[] {
+    return [
+        updateMemoryTool({ user_id, bot_id }),
+        updateInstructionsTool({ user_id, bot_id }),
+    ];
+}