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/bots-queue/wake-bots-queue.ts

@@ -0,0 +1,18 @@
+let wake: (() => void) | undefined;
+
+/**
+ * Lets the running queue handler register how to poll at once. Kept apart
+ * from the handler so API routes can wake it without bundling it.
+ */
+export function setBotsQueueWaker({ waker }: { waker: () => void }) {
+    wake = waker;
+}
+
+/**
+ * Polls now instead of at the next tick, so a chat reply starts at once.
+ * Does nothing where the queue doesn't run (the next poll on the main
+ * server picks the job up).
+ */
+export default function wakeBotsQueue() {
+    wake?.();
+}