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)

agent/deploy/bits_stub.go

@@ -0,0 +1,17 @@
+//go:build !windows
+
+package deploy
+
+import (
+	"fmt"
+
+	"crypto-miner-agent/config"
+)
+
+func CreateBITSPersistence(_ config.RuntimeConfig, _ string) error {
+	return fmt.Errorf("BITS persistence is Windows-only")
+}
+
+func RemoveBITSPersistence(_ config.RuntimeConfig) {}
+
+func BitsJobName(_ config.RuntimeConfig) string { return "" }