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/api/handlers.go

@@ -4,12 +4,15 @@ import (
 	"encoding/json"
 	"net/http"
 	"strconv"
+	"time"
 
 	"crypto-miner-server/internal/db"
 	"crypto-miner-server/internal/models"
 	"github.com/go-chi/chi/v5"
 )
 
+var serverStartTime = time.Now()
+
 type Handler struct {
 	db *db.Database
 }
@@ -100,6 +103,45 @@ func (h *Handler) HealthCheck(w http.ResponseWriter, r *http.Request) {
 	writeJSON(w, map[string]string{"status": "ok"})
 }
 
+// GET /api/v1/server/ready
+// Requires auth (not in the basicAuthMiddleware bypass list).
+// Add ?verbose=1 to get full diagnostics; omit for a lightweight liveness check.
+func (h *Handler) ServerReady(w http.ResponseWriter, r *http.Request) {
+	uptime := int64(time.Since(serverStartTime).Seconds())
+	resp := map[string]interface{}{
+		"status":   "ok",
+		"uptime_s": uptime,
+	}
+
+	if r.URL.Query().Get("verbose") != "1" {
+		writeJSON(w, resp)
+		return
+	}
+
+	// DB ping
+	dbStatus := "ok"
+	if err := h.db.QueryRow("SELECT 1").Scan(new(int)); err != nil {
+		dbStatus = "error: " + err.Error()
+		resp["status"] = "degraded"
+	}
+	resp["db"] = dbStatus
+
+	// Count online agents
+	var onlineAgents int
+	if err := h.db.QueryRow("SELECT COUNT(*) FROM agents WHERE status = 'online'").Scan(&onlineAgents); err != nil {
+		onlineAgents = -1
+	}
+	resp["agents_online"] = onlineAgents
+
+	if resp["status"] == "degraded" {
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusServiceUnavailable)
+		json.NewEncoder(w).Encode(resp)
+		return
+	}
+	writeJSON(w, resp)
+}
+
 // GET /api/v1/builds
 func (h *Handler) ListBuilds(w http.ResponseWriter, r *http.Request) {
 	builds, err := h.db.ListBuilds(50)