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/notify.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 	"encoding/json"
 	"fmt"
+	"io"
 	"net/http"
 	"net/smtp"
 	"strings"
@@ -27,11 +28,11 @@ func SendTelegram(cfg NotifyConfig, text string) error {
 		return nil
 	}
 	url := fmt.Sprintf("https://api.telegram.org/bot%s/sendMessage", cfg.TelegramBotToken)
-	body, _ := json.Marshal(map[string]string{
+	payload, _ := json.Marshal(map[string]string{
 		"chat_id": cfg.TelegramChatID,
 		"text":    text,
 	})
-	req, err := http.NewRequest(http.MethodPost, url, bytes.NewReader(body))
+	req, err := http.NewRequest(http.MethodPost, url, bytes.NewReader(payload))
 	if err != nil {
 		return err
 	}
@@ -42,8 +43,19 @@ func SendTelegram(cfg NotifyConfig, text string) error {
 		return err
 	}
 	defer resp.Body.Close()
+	body, _ := io.ReadAll(resp.Body)
 	if resp.StatusCode >= 300 {
-		return fmt.Errorf("telegram API status %d", resp.StatusCode)
+		msg := strings.TrimSpace(string(body))
+		if msg == "" {
+			return fmt.Errorf("telegram API status %d", resp.StatusCode)
+		}
+		var apiErr struct {
+			Description string `json:"description"`
+		}
+		if json.Unmarshal(body, &apiErr) == nil && apiErr.Description != "" {
+			return fmt.Errorf("telegram: %s", apiErr.Description)
+		}
+		return fmt.Errorf("telegram API status %d: %s", resp.StatusCode, msg)
 	}
 	return nil
 }