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/alerts/notifier_test.go

@@ -0,0 +1,25 @@
+package alerts
+
+import "testing"
+
+func TestNotifierRespectsToggles(t *testing.T) {
+	n := NewNotifier(func() Settings {
+		return NewSettings(
+			NotifyConfig{TelegramBotToken: "t", TelegramChatID: "1"},
+			EventToggles{AgentConnect: false, AgentReconnect: true},
+		)
+	})
+	// disabled — no panic
+	n.Emit(EventAgentConnect, "title", "body")
+	n.Emit(EventAgentReconnect, "title", "body")
+}
+
+func TestSettingsEnabledForAlertType(t *testing.T) {
+	s := NewSettings(NotifyConfig{}, EventToggles{AgentOffline: false, HashrateDrop: true})
+	if s.EnabledForAlertType("offline") {
+		t.Fatal("expected offline disabled")
+	}
+	if !s.EnabledForAlertType("hashrate_drop") {
+		t.Fatal("expected hashrate enabled")
+	}
+}