Let each install pick its app icon

Settings > General gets an App icon (super admin): one of the seven
stones, or an uploaded image with the picked stone as a top-left corner
mark (inside a round launcher's crop, clear of the browser's badge),
previewed in both launcher crops before saving.

Uploads are decoded and cropped to a stored square (no SVG); the set is
drawn into DATA_DIR/install-icon/<version>/ and served publicly and
immutable. The manifest, head icon links and push notifications point at
it; the ember stone keeps the stock icons. The generator shares the icon
renderer.

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

src/push/deliver-to-user.ts

@@ -1,10 +1,13 @@
 import type { PushPayload } from "@/src/dict/push-dict";
 import grabPushSubscriptions from "@/src/functions/backend/db/push/grab-push-subscriptions";
+import grabInstallIcon from "@/src/functions/backend/db/app-settings/grab-install-icon";
+import installIconBase from "@/src/utils/install-icon-base";
 import sendWebPush from "./send-web-push";
 
 /**
- * Sends to every device the user subscribed. Best effort: one failed
- * device does not stop the others.
+ * Sends to every device the user subscribed, with the install's own icon
+ * when it has one. Best effort: one failed device does not stop the
+ * others.
  */
 export default async function deliverToUser({
     user_id,
@@ -15,9 +18,14 @@ export default async function deliverToUser({
 }) {
     const subscriptions = await grabPushSubscriptions({ user_id });
 
+    if (!subscriptions.length) return;
+
+    const icon_base = installIconBase({ icon: await grabInstallIcon().catch(() => null) });
+    const sent = icon_base ? { ...payload, icon: `${icon_base}/icon-192.png` } : payload;
+
     await Promise.all(
         subscriptions.map((subscription) =>
-            sendWebPush({ subscription, payload }),
+            sendWebPush({ subscription, payload: sent }),
         ),
     );
 }