fix: magnifier правильные координаты + haptic при изменении выделения

Magnifier:
- Конвертация overlay-local → view-local координаты для Magnifier.show()
- Builder: 240×64px, cornerRadius 12, elevation 4, offset -80 (над текстом)

Haptic:
- TEXT_HANDLE_MOVE при каждом изменении selectionStart/selectionEnd
- Как в Telegram: вибрация при перемещении handle по словам

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

app/src/main/java/com/rosetta/messenger/ui/chats/components/TextSelectionHelper.kt

@@ -127,7 +127,9 @@ class TextSelectionHelper {
         var newStart = charOffset.coerceIn(0, text.length)
         while (newStart > 0 && Character.isLetterOrDigit(text[newStart - 1])) newStart--
         if (newStart >= selectionEnd) return
+        val changed = newStart != selectionStart
         selectionStart = newStart
+        if (changed) hapticOnSelectionChange()
     }
 
     fun updateSelectionEnd(charOffset: Int) {
@@ -136,7 +138,16 @@ class TextSelectionHelper {
         var newEnd = charOffset.coerceIn(0, text.length)
         while (newEnd < text.length && Character.isLetterOrDigit(text[newEnd])) newEnd++
         if (newEnd <= selectionStart) return
+        val changed = newEnd != selectionEnd
         selectionEnd = newEnd
+        if (changed) hapticOnSelectionChange()
+    }
+
+    private fun hapticOnSelectionChange() {
+        magnifierView?.performHapticFeedback(
+            HapticFeedbackConstants.TEXT_HANDLE_MOVE,
+            HapticFeedbackConstants.FLAG_IGNORE_GLOBAL_SETTING
+        )
     }
 
     fun beginHandleDrag(isStart: Boolean, touchX: Float, touchY: Float) {
@@ -180,24 +191,30 @@ class TextSelectionHelper {
         magnifierView = view
     }
 
-    fun showMagnifier(x: Float, y: Float) {
+    fun showMagnifier(overlayLocalX: Float, overlayLocalY: Float) {
         if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.P) return
         val view = magnifierView ?: return
         if (!movingHandle) return
         if (magnifier == null) {
             magnifier = if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.Q) {
                 android.widget.Magnifier.Builder(view)
-                    .setSize(200, 80)
-                    .setCornerRadius(16f)
+                    .setSize(240, 64)
+                    .setCornerRadius(12f)
+                    .setElevation(4f)
+                    .setDefaultSourceToMagnifierOffset(0, -80)
                     .build()
             } else {
+                @Suppress("DEPRECATION")
                 android.widget.Magnifier(view)
             }
         }
         val info = layoutInfo ?: return
-        val localX = (x - info.windowX).coerceIn(0f, view.width.toFloat())
-        val localY = (y - info.windowY).coerceIn(0f, view.height.toFloat())
-        magnifier?.show(localX, localY)
+        // Convert overlay-local → view-local (magnifierView coords)
+        val viewLoc = IntArray(2)
+        view.getLocationInWindow(viewLoc)
+        val sourceX = (overlayLocalX + overlayWindowX - viewLoc[0]).coerceIn(0f, view.width.toFloat())
+        val sourceY = (overlayLocalY + overlayWindowY - viewLoc[1]).coerceIn(0f, view.height.toFloat())
+        magnifier?.show(sourceX, sourceY)
     }
 
     fun hideMagnifier() {