refactor: simplify and unify DatabaseFilePicker instantiation

- Remove the redundant `rememberDatabaseFilePicker` wrapper and promote `rememberPlatformDatabaseFilePicker` to public visibility.
- Update `SettingsDetailScreen` and all platform implementations (Android, iOS, JVM, WasmJs) to use the unified `rememberPlatformDatabaseFilePicker` function.
- Clean up implementation syntax in JVM and WasmJs modules for better readability.
- Add explicit parameter names to `rememberLauncherForActivityResult` in the Android implementation.

Author: softartdev

feature/backup/ui/src/androidMain/kotlin/com/softartdev/notedelight/ui/settings/detail/DatabaseFilePicker.android.kt

@@ -7,16 +7,16 @@ import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 
 @Composable
-internal actual fun rememberPlatformDatabaseFilePicker(): DatabaseFilePicker {
+actual fun rememberPlatformDatabaseFilePicker(): DatabaseFilePicker {
     val exportCallback = remember { mutableStateOf<(String?) -> Unit>({}) }
     val importCallback = remember { mutableStateOf<(String?) -> Unit>({}) }
     val exportLauncher = rememberLauncherForActivityResult(
-        ActivityResultContracts.CreateDocument("application/octet-stream")
+        contract = ActivityResultContracts.CreateDocument("application/octet-stream")
     ) { uri ->
         exportCallback.value(uri?.toString())
     }
     val importLauncher = rememberLauncherForActivityResult(
-        ActivityResultContracts.OpenDocument()
+        contract = ActivityResultContracts.OpenDocument()
     ) { uri ->
         importCallback.value(uri?.toString())
     }

feature/backup/ui/src/commonMain/kotlin/com/softartdev/notedelight/ui/settings/detail/DatabaseFilePicker.kt

@@ -8,7 +8,4 @@ interface DatabaseFilePicker {
 }
 
 @Composable
-fun rememberDatabaseFilePicker(): DatabaseFilePicker = rememberPlatformDatabaseFilePicker()
-
-@Composable
-internal expect fun rememberPlatformDatabaseFilePicker(): DatabaseFilePicker
+expect fun rememberPlatformDatabaseFilePicker(): DatabaseFilePicker

feature/backup/ui/src/iosMain/kotlin/com/softartdev/notedelight/ui/settings/detail/DatabaseFilePicker.ios.kt

@@ -1,6 +1,7 @@
 package com.softartdev.notedelight.ui.settings.detail
 
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.MutableState
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import platform.Foundation.NSURL
@@ -12,8 +13,8 @@ import platform.UIKit.UIViewController
 import platform.darwin.NSObject
 
 @Composable
-internal actual fun rememberPlatformDatabaseFilePicker(): DatabaseFilePicker {
-    val delegateHolder = remember { mutableStateOf<NSObject?>(null) }
+actual fun rememberPlatformDatabaseFilePicker(): DatabaseFilePicker {
+    val delegateHolder: MutableState<NSObject?> = remember { mutableStateOf(null) }
     return remember {
         object : DatabaseFilePicker {
             override fun launchExport(defaultFileName: String, onPicked: (String?) -> Unit) {

feature/backup/ui/src/jvmMain/kotlin/com/softartdev/notedelight/ui/settings/detail/DatabaseFilePicker.jvm.kt

@@ -6,33 +6,30 @@ import java.awt.FileDialog
 import java.io.File
 
 @Composable
-internal actual fun rememberPlatformDatabaseFilePicker(): DatabaseFilePicker {
-    return remember {
-        object : DatabaseFilePicker {
-            override fun launchExport(defaultFileName: String, onPicked: (String?) -> Unit) {
-                val dialog = FileDialog(null as java.awt.Frame?, "Export Database", FileDialog.SAVE)
-                dialog.file = defaultFileName
-                dialog.isVisible = true
-                val fileName = dialog.file
-                val directory = dialog.directory
-                if (fileName.isNullOrEmpty() || directory.isNullOrEmpty()) {
-                    onPicked(null)
-                    return
-                }
-                onPicked(File(directory, fileName).absolutePath)
+actual fun rememberPlatformDatabaseFilePicker(): DatabaseFilePicker = remember {
+    object : DatabaseFilePicker {
+        override fun launchExport(defaultFileName: String, onPicked: (String?) -> Unit) {
+            val dialog = FileDialog(null as java.awt.Frame?, "Export Database", FileDialog.SAVE)
+            dialog.file = defaultFileName
+            dialog.isVisible = true
+            val fileName = dialog.file
+            val directory = dialog.directory
+            if (fileName.isNullOrEmpty() || directory.isNullOrEmpty()) {
+                onPicked(null)
+                return
             }
-
-            override fun launchImport(onPicked: (String?) -> Unit) {
-                val dialog = FileDialog(null as java.awt.Frame?, "Import Database", FileDialog.LOAD)
-                dialog.isVisible = true
-                val fileName = dialog.file
-                val directory = dialog.directory
-                if (fileName.isNullOrEmpty() || directory.isNullOrEmpty()) {
-                    onPicked(null)
-                    return
-                }
-                onPicked(File(directory, fileName).absolutePath)
+            onPicked(File(directory, fileName).absolutePath)
+        }
+        override fun launchImport(onPicked: (String?) -> Unit) {
+            val dialog = FileDialog(null as java.awt.Frame?, "Import Database", FileDialog.LOAD)
+            dialog.isVisible = true
+            val fileName = dialog.file
+            val directory = dialog.directory
+            if (fileName.isNullOrEmpty() || directory.isNullOrEmpty()) {
+                onPicked(null)
+                return
             }
+            onPicked(File(directory, fileName).absolutePath)
         }
     }
 }

feature/backup/ui/src/wasmJsMain/kotlin/com/softartdev/notedelight/ui/settings/detail/DatabaseFilePicker.wasmJs.kt

@@ -4,16 +4,13 @@ import androidx.compose.runtime.Composable
 import androidx.compose.runtime.remember
 
 @Composable
-internal actual fun rememberPlatformDatabaseFilePicker(): DatabaseFilePicker {
-    return remember {
-        object : DatabaseFilePicker {
-            override fun launchExport(defaultFileName: String, onPicked: (String?) -> Unit) {
-                onPicked(null)
-            }
-
-            override fun launchImport(onPicked: (String?) -> Unit) {
-                onPicked(null)
-            }
+actual fun rememberPlatformDatabaseFilePicker(): DatabaseFilePicker = remember {
+    object : DatabaseFilePicker {
+        override fun launchExport(defaultFileName: String, onPicked: (String?) -> Unit) {
+            onPicked(null)
+        }
+        override fun launchImport(onPicked: (String?) -> Unit) {
+            onPicked(null)
         }
     }
 }

ui/shared/src/commonMain/kotlin/com/softartdev/notedelight/ui/settings/detail/SettingsDetailScreen.kt

@@ -237,7 +237,7 @@ private fun InfoPreferences(
 @Composable
 private fun BackupPreferences(
     onAction: (SettingsAction) -> Unit,
-    databaseFilePicker: DatabaseFilePicker = rememberDatabaseFilePicker(),
+    databaseFilePicker: DatabaseFilePicker = rememberPlatformDatabaseFilePicker(),
 ) {
     Preference(
         modifier = Modifier.testTag(EXPORT_DATABASE_BUTTON_TAG),