Add health check command and panorama control

- New `dwarfctl health` command: checks WebSocket connectivity, device state,
  battery, storage, RGB, focus motor, both cameras, motor position status,
  and CMOS temperature in one pass with clear OK/FAIL output
- Added `dwarfctl pano start|stop` for panorama grid control
- Added StartPanoramaGrid/StopPanorama to the API client
- Fixed CMOS temperature display (int32 not float64)

💘 Generated with Crush

Assisted-by: Crush:glm-5.2

dwarfctl/cmd/dwarfctl/main.go

@@ -29,6 +29,7 @@ func main() {
 	rootCmd.PersistentFlags().BoolVarP(&flagDebug, "debug", "d", false, "verbose WebSocket traffic log")
 
 	rootCmd.AddCommand(
+		cmdHealth(),
 		cmdState(),
 		cmdCamera(),
 		cmdMotor(),
@@ -71,6 +72,106 @@ func mustCam(s string) api.Camera {
 	}
 }
 
+// --- health ---
+
+func cmdHealth() *cobra.Command {
+	return &cobra.Command{
+		Use:   "health",
+		Short: "Full telescope health check (connectivity + device state)",
+		Run: func(_ *cobra.Command, _ []string) {
+			checks := 0
+			passed := 0
+
+			check := func(name string, ok bool, detail string) {
+				checks++
+				if ok {
+					passed++
+					fmt.Printf("  ✅ %-20s %s\n", name, detail)
+				} else {
+					fmt.Printf("  ❌ %-20s %s\n", name, detail)
+				}
+			}
+
+			fmt.Println("DWARF Telescope Health Check")
+			fmt.Println(strings.Repeat("=", 50))
+
+			// 1. Connect
+			scope := api.New(flagClientID)
+			scope.SetDebug(flagDebug)
+			connectStart := time.Now()
+			err := scope.Connect(flagIP)
+			elapsed := time.Since(connectStart)
+			check("WebSocket :9900", err == nil, fmt.Sprintf("%s (%dms)", flagIP+":9900", elapsed.Milliseconds()))
+			if err != nil {
+				fmt.Println("\nCannot connect. Aborting.")
+				os.Exit(1)
+			}
+			defer scope.Close()
+
+			// 2. Device state
+			state, err := scope.GetDeviceState()
+			check("Device state query", err == nil, fmt.Sprintf("%d bytes", len(state.String())))
+
+			if err == nil {
+				di := state.GetDeviceStateInfo()
+
+				// 3. Battery
+				batt := di.GetBatteryInfo().GetPercentage()
+				check("Battery", batt > 0, fmt.Sprintf("%d%%", batt))
+
+				// 4. Storage
+				stor := di.GetStorageInfo()
+				avail := stor.GetAvailableSize()
+				total := stor.GetTotalSize()
+				storOK := total > 0 && avail > 0 && stor.GetIsValid()
+				check("Storage", storOK, fmt.Sprintf("%d/%d GB (%s)", avail, total, func() string {
+					if storOK { return "valid" }
+					return "INVALID"
+				}()))
+
+				// 5. RGB state
+				rgb := di.GetRgbState().GetState()
+				check("RGB ring", true, fmt.Sprintf("state=%d", rgb))
+
+				// 6. Focus position
+				focus := state.GetFocusMotorStateInfo().GetFocusPosition().GetPos()
+				check("Focus motor", focus > 0, fmt.Sprintf("pos=%d", focus))
+
+				// 7. Tele camera
+				tele := state.GetTeleCameraStateInfo()
+				teleRes := fmt.Sprintf("%dx%d", tele.GetResolutionWidth(), tele.GetResolutionHeight())
+				check("Tele camera", tele.GetResolutionWidth() > 0, teleRes)
+
+				// 8. Wide camera
+				wide := state.GetWideCameraStateInfo()
+				wideRes := fmt.Sprintf("%dx%d", wide.GetResolutionWidth(), wide.GetResolutionHeight())
+				check("Wide camera", wide.GetResolutionWidth() > 0, wideRes)
+
+				// 9. Motor position (may be NEED_RESET)
+				pos, posErr := scope.MotorGetPosition(0)
+				if posErr != nil {
+					check("Motor position", false, posErr.Error())
+				} else if pos.GetCode() != 0 {
+					check("Motor position", false, fmt.Sprintf("code=%d (NEED_RESET)", pos.GetCode()))
+				} else {
+					check("Motor position", true, fmt.Sprintf("%.2f", pos.GetPosition()))
+				}
+
+				// 10. Temperature
+				cmosTemp := state.GetWideCameraStateInfo().GetCmosTemperature().GetTemperature()
+				check("CMOS temp", cmosTemp > -270, fmt.Sprintf("%d°C", cmosTemp))
+			}
+
+			fmt.Println(strings.Repeat("=", 50))
+			status := "HEALTHY"
+			if passed < checks {
+				status = "ISSUES DETECTED"
+			}
+			fmt.Printf("Result: %d/%d checks passed — %s\n", passed, checks, status)
+		},
+	}
+}
+
 // --- state ---
 
 func cmdState() *cobra.Command {