fix: NIRS connection failure

.claude/settings.local.json

@@ -0,0 +1,7 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(git push -u origin master)"
+    ]
+  }
+}

app/src/main/java/com/example/medilightv2android/ble/BleManager.kt

@@ -413,13 +413,38 @@ class BleManager private constructor(private val context: Context) {
                     }
                 } else {
                     Log.w(TAG, "CCCD descriptor not found for RX characteristic")
-                }
-            }
-
+                    // No CCCD but still mark ready if characteristics exist
                     handler.post {
                         if (txCharacteristic != null && rxCharacteristic != null) {
                             isServiceReady.value = true
-                    Log.d(TAG, "Service ready!")
+                            Log.d(TAG, "Service ready (no CCCD)")
+                        }
+                    }
+                }
+            } ?: run {
+                // No RX characteristic, mark ready if TX exists
+                handler.post {
+                    if (txCharacteristic != null) {
+                        isServiceReady.value = true
+                        Log.d(TAG, "Service ready (no RX)")
+                    }
+                }
+            }
+        }
+
+        override fun onDescriptorWrite(gatt: BluetoothGatt, descriptor: BluetoothGattDescriptor, status: Int) {
+            Log.d(TAG, "onDescriptorWrite: status=$status uuid=${descriptor.uuid}")
+            if (descriptor.uuid == CCCD_UUID) {
+                handler.post {
+                    if (status == BluetoothGatt.GATT_SUCCESS) {
+                        if (txCharacteristic != null && rxCharacteristic != null) {
+                            isServiceReady.value = true
+                            Log.d(TAG, "Service ready! (CCCD written)")
+                        }
+                    } else {
+                        Log.e(TAG, "CCCD write failed with status: $status")
+                        connectionError.value = "Notification setup failed (status $status)"
+                    }
                 }
             }
         }