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/settings/environment/index.server.ts

@@ -0,0 +1,33 @@
+import type { PagePropsType } from "@/src/types";
+import type { BunextPageServerFn } from "@moduletrace/bunext/types";
+import { SettingsDefaultPath } from "@/src/dict/settings-pages-dict";
+import grabSuperAdminUser from "@/src/functions/backend/backups/grab-super-admin-user";
+import grabEnvsOverview from "@/src/functions/backend/db/envs/grab-envs-overview";
+import grabSettingsServerProps from "../(functions)/grab-settings-server-props";
+
+/**
+ * Super admins only; everyone else lands on the general settings.
+ */
+export const server: BunextPageServerFn<PagePropsType> = async (params) => {
+    const settings = await grabSettingsServerProps(params);
+
+    if (!settings.props) return settings;
+
+    const user = await grabSuperAdminUser({ req: params.req });
+
+    if (!user?.id) {
+        return {
+            redirect: {
+                destination: SettingsDefaultPath,
+                permanent: false,
+            },
+        };
+    }
+
+    return {
+        props: {
+            ...settings.props,
+            envs_overview: await grabEnvsOverview({ user_id: Number(user.id) }),
+        },
+    };
+};