Implement new account deletion and auth flows

Signed-off-by: denis0001-dev <denis0001.dev@ya.ru>

utils/shared/src/androidMain/kotlin/com/pr0gramm3r101/utils/ImeMotion.android.kt

@@ -0,0 +1,20 @@
+package com.pr0gramm3r101.utils
+
+import androidx.compose.foundation.layout.ExperimentalLayoutApi
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.ime
+import androidx.compose.foundation.layout.imeAnimationSource
+import androidx.compose.foundation.layout.imeAnimationTarget
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.platform.LocalDensity
+
+@OptIn(ExperimentalLayoutApi::class)
+@Composable
+actual fun rememberImeMotion(): ImeMotion {
+    val density = LocalDensity.current
+    return ImeMotion(
+        currentBottomPx = WindowInsets.ime.getBottom(density),
+        sourceBottomPx = WindowInsets.imeAnimationSource.getBottom(density),
+        targetBottomPx = WindowInsets.imeAnimationTarget.getBottom(density),
+    )
+}

utils/shared/src/commonMain/kotlin/com/pr0gramm3r101/utils/ImeMotion.kt

@@ -0,0 +1,79 @@
+package com.pr0gramm3r101.utils
+
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.Immutable
+
+/**
+ * IME inset motion for the current frame.
+ *
+ * On Android, [sourceBottomPx] / [targetBottomPx] come from
+ * [androidx.compose.foundation.layout.WindowInsets.imeAnimationSource] and
+ * [androidx.compose.foundation.layout.WindowInsets.imeAnimationTarget].
+ */
+@Immutable
+data class ImeMotion(
+    val currentBottomPx: Int,
+    val sourceBottomPx: Int,
+    val targetBottomPx: Int,
+) {
+    val isAnimating: Boolean
+        get() = sourceBottomPx != targetBottomPx
+
+    val isOpeningAnimation: Boolean
+        get() = isAnimating && targetBottomPx > sourceBottomPx
+
+    val isClosingAnimation: Boolean
+        get() = isAnimating && targetBottomPx < sourceBottomPx
+
+    /** Open animation that started from a fully hidden keyboard. */
+    val isOpeningFromClosed: Boolean
+        get() = isOpeningAnimation && sourceBottomPx == 0
+}
+
+/** Keyboard phase used to decide when bring-into-view may run. */
+enum class ImeKeyboardPhase {
+    /** IME inset is zero. */
+    Hidden,
+    /** Keyboard animating up from fully hidden — follow with bring-into-view. */
+    OpeningFromHidden,
+    /** Keyboard visible and not in an inset animation. */
+    Open,
+    /** Keyboard animating down (inset shrinking). */
+    Closing,
+    /** Keyboard animating back up after a cancelled / partial dismiss. */
+    ReopeningPartial,
+}
+
+/**
+ * @param settledImeBottomPx last IME bottom when no inset animation was in progress.
+ * @param previousReportedImeBottomPx IME bottom on the prior processed frame.
+ */
+fun ImeMotion.keyboardPhase(
+    settledImeBottomPx: Int,
+    previousReportedImeBottomPx: Int,
+): ImeKeyboardPhase {
+    when {
+        isOpeningFromClosed -> return ImeKeyboardPhase.OpeningFromHidden
+
+        isOpeningAnimation && sourceBottomPx > 0 && settledImeBottomPx > 0 ->
+            return ImeKeyboardPhase.ReopeningPartial
+
+        isClosingAnimation -> return ImeKeyboardPhase.Closing
+
+        // iOS / fallback: inset growing from zero without animation metadata.
+        previousReportedImeBottomPx <= 0 && currentBottomPx > 0 &&
+            (previousReportedImeBottomPx < 0 || currentBottomPx > previousReportedImeBottomPx) ->
+            return ImeKeyboardPhase.OpeningFromHidden
+
+        // iOS / fallback: inset shrinking frame-by-frame.
+        previousReportedImeBottomPx > 0 && currentBottomPx in 1..<previousReportedImeBottomPx ->
+            return ImeKeyboardPhase.Closing
+
+        currentBottomPx > 0 -> return ImeKeyboardPhase.Open
+
+        else -> return ImeKeyboardPhase.Hidden
+    }
+}
+
+@Composable
+expect fun rememberImeMotion(): ImeMotion

utils/shared/src/commonMain/kotlin/com/pr0gramm3r101/utils/LastAnchoredBottomArrangement.kt

@@ -0,0 +1,41 @@
+package com.pr0gramm3r101.utils
+
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.runtime.Stable
+import androidx.compose.ui.unit.Density
+import androidx.compose.ui.unit.Dp
+
+/**
+ * Fixed [Dp] gaps between children, plus extra height before the last child so it sits at the
+ * bottom when content is shorter than the viewport.
+ */
+@Stable
+class LastAnchoredBottomArrangement(
+    private val space: Dp,
+) : Arrangement.Vertical {
+    override val spacing get() = space
+
+    override fun Density.arrange(
+        totalSize: Int,
+        sizes: IntArray,
+        outPositions: IntArray,
+    ) {
+        val spacePx = space.roundToPx()
+        when (sizes.size) {
+            0 -> return
+            1 -> {
+                outPositions[0] = (totalSize - sizes[0]).coerceAtLeast(0)
+                return
+            }
+        }
+
+        var y = 0
+        for (i in 0 until sizes.size - 1) {
+            outPositions[i] = y
+            y += sizes[i] + spacePx
+        }
+
+        outPositions[sizes.size - 1] =
+            y + (totalSize - sizes.sum() - (spacePx * (sizes.size - 1))).coerceAtLeast(0)
+    }
+}

utils/shared/src/iosMain/kotlin/com/pr0gramm3r101/utils/ImeMotion.ios.kt

@@ -0,0 +1,17 @@
+package com.pr0gramm3r101.utils
+
+import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.ime
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.platform.LocalDensity
+
+@Composable
+actual fun rememberImeMotion(): ImeMotion {
+    val density = LocalDensity.current
+    val currentBottomPx = WindowInsets.ime.getBottom(density)
+    return ImeMotion(
+        currentBottomPx = currentBottomPx,
+        sourceBottomPx = currentBottomPx,
+        targetBottomPx = currentBottomPx,
+    )
+}