Initial implementation of Tilt-Shift Camera Android app

A dedicated camera app for tilt-shift photography with:
- Real-time OpenGL ES 2.0 shader-based blur preview
- Touch gesture controls (drag, rotate, pinch) for adjusting effect
- CameraX integration for camera preview and high-res capture
- EXIF metadata with GPS location support
- MediaStore integration for saving to gallery
- Jetpack Compose UI with haptic feedback

Tech stack: Kotlin, CameraX, OpenGL ES 2.0, Jetpack Compose
Min SDK: 26 (Android 8.0), Target SDK: 35 (Android 15)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/src/main/java/no/naiv/tiltshift/util/HapticFeedback.kt

@@ -0,0 +1,98 @@
+package no.naiv.tiltshift.util
+
+import android.content.Context
+import android.os.Build
+import android.os.VibrationEffect
+import android.os.Vibrator
+import android.os.VibratorManager
+import android.view.HapticFeedbackConstants
+import android.view.View
+
+/**
+ * Provides haptic feedback for user interactions.
+ */
+class HapticFeedback(private val context: Context) {
+
+    private val vibrator: Vibrator by lazy {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+            val vibratorManager = context.getSystemService(Context.VIBRATOR_MANAGER_SERVICE) as VibratorManager
+            vibratorManager.defaultVibrator
+        } else {
+            @Suppress("DEPRECATION")
+            context.getSystemService(Context.VIBRATOR_SERVICE) as Vibrator
+        }
+    }
+
+    /**
+     * Light tick for UI feedback (button press, slider change).
+     */
+    fun tick() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+            vibrator.vibrate(VibrationEffect.createPredefined(VibrationEffect.EFFECT_TICK))
+        } else {
+            @Suppress("DEPRECATION")
+            vibrator.vibrate(10L)
+        }
+    }
+
+    /**
+     * Click feedback for confirmations.
+     */
+    fun click() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+            vibrator.vibrate(VibrationEffect.createPredefined(VibrationEffect.EFFECT_CLICK))
+        } else {
+            @Suppress("DEPRECATION")
+            vibrator.vibrate(20L)
+        }
+    }
+
+    /**
+     * Heavy click for important actions (photo capture).
+     */
+    fun heavyClick() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+            vibrator.vibrate(VibrationEffect.createPredefined(VibrationEffect.EFFECT_HEAVY_CLICK))
+        } else {
+            @Suppress("DEPRECATION")
+            vibrator.vibrate(40L)
+        }
+    }
+
+    /**
+     * Success feedback pattern.
+     */
+    fun success() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+            val timings = longArrayOf(0, 30, 50, 30)
+            val amplitudes = intArrayOf(0, 100, 0, 200)
+            vibrator.vibrate(VibrationEffect.createWaveform(timings, amplitudes, -1))
+        } else {
+            @Suppress("DEPRECATION")
+            vibrator.vibrate(longArrayOf(0, 30, 50, 30), -1)
+        }
+    }
+
+    /**
+     * Error feedback pattern.
+     */
+    fun error() {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.Q) {
+            val timings = longArrayOf(0, 50, 30, 50, 30, 50)
+            val amplitudes = intArrayOf(0, 150, 0, 150, 0, 150)
+            vibrator.vibrate(VibrationEffect.createWaveform(timings, amplitudes, -1))
+        } else {
+            @Suppress("DEPRECATION")
+            vibrator.vibrate(longArrayOf(0, 50, 30, 50, 30, 50), -1)
+        }
+    }
+
+    companion object {
+        /**
+         * Use system haptic feedback on a View for standard interactions.
+         */
+        fun performHapticFeedback(view: View, feedbackConstant: Int = HapticFeedbackConstants.VIRTUAL_KEY) {
+            view.performHapticFeedback(feedbackConstant)
+        }
+    }
+}