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/update-memory-tool.ts

@@ -0,0 +1,29 @@
+import { z } from "zod";
+import { AppData } from "@/src/data/app-data";
+import updateBotMemory from "@/src/functions/backend/db/bots/update-bot-memory";
+import type { HarnessTool } from "../../types";
+
+type Params = {
+    user_id: number | string;
+    bot_id: number | string;
+};
+
+/**
+ * Lets a bot rewrite its own memory (shown to it under `# Memory`).
+ */
+export default function updateMemoryTool({
+    user_id,
+    bot_id,
+}: Params): HarnessTool<{ memory: string }> {
+    return {
+        name: "update_memory",
+        description: `Replace your memory with this full text (markdown). It's in your prompt under "# Memory" on every run. Keep what you must always remember: the user's preferences, facts about their work, decisions made. Anything you leave out is forgotten, so include the parts that still matter.`,
+        schema: z.object({
+            memory: z.string().max(AppData.PromptMaxLength),
+        }),
+        run: async ({ args }) => {
+            await updateBotMemory({ user_id, bot_id, memory: args.memory });
+            return `Memory saved.`;
+        },
+    };
+}