UI/UX: Preserve asset-editor drafts during recompose (#6193)

* Preserve asset-editor drafts and handle the keyboard

Keep the asset name, URL, and delete-confirmation visibility in saveable Compose state so activity recreation does not discard an unfinished edit. Key the state by asset identity and initial field values.

Make the form vertically scrollable, consume the Scaffold padding, and apply IME padding so its fields remain reachable when the keyboard reduces the available height. Extract these presentation changes from local/talkback-all-10 without changing accessibility labels, deletion wording, or asset-save validation order.

* Resize the asset editor when the keyboard opens

Declare stateUnchanged|adjustResize for UserAssetUrlActivity, matching the other editor activities. Without an explicit resize policy, opening the IME in landscape pans the entire window and moves the toolbar Save action off-screen despite the scrollable Compose form.

Verified on Android 13 Pixel 6a: rotate with an unsaved draft, reopen the landscape keyboard, scroll between fields, edit the first field, save without hiding the keyboard, and reopen persisted values. Portrait keyboard and Save also pass. Debug assembly succeeded.

V2rayNG/app/src/main/AndroidManifest.xml

@@ -157,6 +157,7 @@
             android:exported="false" />
         <activity
             android:name=".ui.userasset.UserAssetUrlActivity"
+            android:windowSoftInputMode="stateUnchanged|adjustResize"
             android:exported="false" />
 
         <activity

V2rayNG/app/src/main/java/com/v2ray/ang/ui/userasset/UserAssetUrlActivity.kt

@@ -4,15 +4,19 @@ import android.os.Bundle
 import android.text.TextUtils
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.WindowInsets
+import androidx.compose.foundation.layout.consumeWindowInsets
 import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.imePadding
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.rememberScrollState
+import androidx.compose.foundation.verticalScroll
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.material3.Scaffold
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.remember
+import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.painterResource
@@ -138,9 +142,9 @@ fun UserAssetUrlScreen(
     onSave: (String, String) -> Boolean,
     onDelete: () -> Unit
 ) {
-    var remarks by remember { mutableStateOf(initialRemarks) }
-    var url by remember { mutableStateOf(initialUrl) }
-    var showDeleteConfirm by remember { mutableStateOf(false) }
+    var remarks by rememberSaveable(editAssetId, initialRemarks) { mutableStateOf(initialRemarks) }
+    var url by rememberSaveable(editAssetId, initialUrl) { mutableStateOf(initialUrl) }
+    var showDeleteConfirm by rememberSaveable(editAssetId) { mutableStateOf(false) }
 
     Scaffold(
         contentWindowInsets = WindowInsets(0),
@@ -171,6 +175,9 @@ fun UserAssetUrlScreen(
             modifier = Modifier
                 .fillMaxSize()
                 .padding(innerPadding)
+                .consumeWindowInsets(innerPadding)
+                .imePadding()
+                .verticalScroll(rememberScrollState())
                 .padding(vertical = 8.dp)
         ) {
             FormTextField(