Write the user's physical tilt into the saved photo's EXIF orientation

Capture saves the bitmap in the device's portrait frame (CameraX
rotates the sensor 90° to match the locked-portrait activity), so a
photo taken while the phone was held in landscape lands on disk as a
portrait-shaped bitmap with world-up pointing to the side. Tag the
EXIF orientation with the user's actual tilt at shutter time
(OrientationEventListener-derived deviceRotation, which up to now
was passed in but ignored), so gallery viewers rotate the photo to
match how the phone was held.

Bump to 1.1.15.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/src/main/java/no/naiv/tiltshift/camera/ImageCaptureHandler.kt

@@ -24,6 +24,7 @@ import kotlin.coroutines.resume
 import kotlin.math.cos
 import kotlin.math.sin
 import kotlin.math.sqrt
+import no.naiv.tiltshift.util.OrientationDetector
 
 /**
  * Handles capturing photos with the tilt-shift effect applied.
@@ -121,10 +122,19 @@ class ImageCaptureHandler(
                 var thumbnail: Bitmap? = null
                 try {
                     thumbnail = createThumbnail(captureResult.processed)
+                    // Camera bitmap is in the device's portrait frame (CameraX
+                    // rotated the sensor 90° because the activity is locked to
+                    // portrait). Tag the EXIF with the user's physical tilt
+                    // when they pressed the shutter so viewers display the
+                    // photo right-side-up regardless of how the phone was held.
+                    val exifOrientation = OrientationDetector.degreesToExifOrientation(
+                        OrientationDetector.rotationToDegrees(deviceRotation),
+                        isFrontCamera
+                    )
                     val result = photoSaver.saveBitmapPair(
                         original = captureResult.original,
                         processed = captureResult.processed,
-                        orientation = ExifInterface.ORIENTATION_NORMAL,
+                        orientation = exifOrientation,
                         location = location
                     )
                     if (result is SaveResult.Success) {