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/dict/media-dict.ts

@@ -11,6 +11,10 @@ export const MediaTypes = [
         title: "Document",
         value: "document",
     },
+    {
+        title: "Audio",
+        value: "audio",
+    },
 ] as const;
 
 export const MediaParadigms = [
@@ -26,4 +30,8 @@ export const MediaParadigms = [
         title: "Event",
         value: "event",
     },
+    {
+        title: "Bot Attachment",
+        value: "bot-attachment",
+    },
 ] as const;