Add dynamic UART/BLE host connect for serve, dashboard, and WS.

Serve starts without a required port; REST/WS/UI can scan and switch transports, with BLE live ticks and UART-only OTA.

Co-authored-by: Cursor <cursoragent@cursor.com>

goTool/cache_status.go

@@ -1,6 +1,12 @@
 package main
 
-import "powerpod/gotool/pb"
+import (
+	"fmt"
+
+	"powerpod/gotool/pb"
+
+	"google.golang.org/protobuf/proto"
+)
 
 // accelSamplesFromCacheStatus maps combined CACHE_STATUS entries to AccelSample
 // (for dashboard / WebSocket accel push).
@@ -47,3 +53,23 @@ func tapEventsFromCacheStatus(r *pb.CacheStatusResponse) []*pb.TapEvent {
 	}
 	return out
 }
+
+// cacheStatusFromBLEStreamPayload parses a framed BLE_STREAM_TICK payload
+// (type byte + protobuf UartMessage) into a CacheStatusResponse-shaped view.
+func cacheStatusFromBLEStreamPayload(payload []byte) (*pb.CacheStatusResponse, error) {
+	if len(payload) < 2 {
+		return nil, fmt.Errorf("BLE stream tick too short")
+	}
+	if payload[0] != byte(pb.MessageType_BLE_STREAM_TICK) {
+		return nil, fmt.Errorf("unexpected BLE tick type 0x%02x", payload[0])
+	}
+	var msg pb.UartMessage
+	if err := proto.Unmarshal(payload[1:], &msg); err != nil {
+		return nil, err
+	}
+	tick := msg.GetBleStreamTick()
+	if tick == nil {
+		return nil, fmt.Errorf("missing ble_stream_tick")
+	}
+	return &pb.CacheStatusResponse{Clients: tick.GetClients()}, nil
+}