Let outside services and computers' browser notifications give bots work

A bot hook (bot_hooks) is a secret URL, POST /api/hooks/<token>, whose
calls queue the hook's brief plus the raw body as a task, per user and
bot like a routine. Only the token's hash is kept (shown once, rotatable);
an optional HMAC-SHA256 signing secret is stored encrypted. Calls are
rate limited per address and per hook, recorded in bot_hook_events
(pruned daily), deduplicated by delivery id, and a call while the last
run still waits joins its brief instead of queueing another. The payload
is fenced data and HookRunNote tells the bot never to take instructions
from it; failed runs retry like routines.

A hook can instead watch a computer's browser notifications: the app
installs a small watcher that owns org.freedesktop.Notifications on the
sandbox's session bus, so Chrome hands it every notification (it only
looks for that service at start-up, so Chrome is restarted once, never
mid-task), and it posts each one to its hooks, optionally filtered.
Computers reach the app at COMPUTER_APP_URL or the app container's name.

Users make hooks in the conversation's Hooks modal and manage them all
on /admin/routines; bots never create or change hooks.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/functions/backend/db/bot-hooks/call-computer-api.ts

@@ -0,0 +1,39 @@
+import { AppData } from "@/src/data/app-data";
+
+type Params = {
+    /**
+     * The sandbox's REST address (no `/mcp`).
+     */
+    base_url: string;
+    path: string;
+    /**
+     * A JSON body makes it a POST.
+     */
+    body?: Record<string, unknown>;
+    timeout_ms?: number;
+};
+
+/**
+ * One call to a computer's sandbox REST API (`/v1/...`). Returns its
+ * JSON; throws when the computer can't be reached or refuses.
+ */
+export default async function callComputerApi({
+    base_url,
+    path,
+    body,
+    timeout_ms = AppData.McpConnectTimeoutMs,
+}: Params): Promise<any> {
+    const res = await fetch(`${base_url}${path}`, {
+        method: body ? "POST" : "GET",
+        headers: { "content-type": "application/json" },
+        body: body ? JSON.stringify(body) : undefined,
+        signal: AbortSignal.timeout(timeout_ms),
+    });
+    const json: any = await res.json().catch(() => ({}));
+
+    if (!res.ok || json?.success === false) {
+        throw new Error(`The computer refused ${path}: ${json?.message || res.status}`);
+    }
+
+    return json;
+}