feat: migrate remaining IMessageField implementors to TextFieldState

Completes the TextFieldState migration for ShortNotePostViewModel,
LongFormPostViewModel, and their associated post screens (GeoHash,
Hashtag, ShortNote, LongForm).

https://claude.ai/code/session_01FDGf1Zi1pVvzFi3JY5agnJ

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/discover/nip23LongForm/LongFormPostScreen.kt

@@ -62,8 +62,9 @@ import androidx.lifecycle.viewmodel.compose.viewModel
 import com.vitorpamplona.amethyst.R
 import com.vitorpamplona.amethyst.commons.model.EmptyTagList
 import com.vitorpamplona.amethyst.ui.actions.StrippingFailureDialog
-import com.vitorpamplona.amethyst.ui.actions.UrlUserTagTransformation
+import com.vitorpamplona.amethyst.ui.actions.UrlUserTagOutputTransformation
 import com.vitorpamplona.amethyst.ui.actions.uploads.SelectFromFiles
+import com.vitorpamplona.amethyst.ui.components.ThinPaddingTextField
 import com.vitorpamplona.amethyst.ui.actions.uploads.SelectFromGallery
 import com.vitorpamplona.amethyst.ui.actions.uploads.SelectSingleFromGallery
 import com.vitorpamplona.amethyst.ui.actions.uploads.TakePictureButton
@@ -293,7 +294,7 @@ private fun MarkdownPostScreenBody(
                                 .padding(Size10dp),
                     ) {
                         RenderContentAsMarkdown(
-                            content = postViewModel.message.text,
+                            content = postViewModel.message.text.toString(),
                             tags = EmptyTagList,
                             canPreview = true,
                             quotesLeft = 1,
@@ -304,9 +305,9 @@ private fun MarkdownPostScreenBody(
                     }
                 } else {
                     // Markdown editor
-                    OutlinedTextField(
-                        value = postViewModel.message,
-                        onValueChange = postViewModel::updateMessage,
+                    ThinPaddingTextField(
+                        state = postViewModel.message,
+                        onTextChanged = postViewModel::onMessageChanged,
                         modifier =
                             Modifier
                                 .fillMaxWidth()
@@ -328,7 +329,7 @@ private fun MarkdownPostScreenBody(
                                 focusedBorderColor = Color.Transparent,
                                 unfocusedBorderColor = Color.Transparent,
                             ),
-                        visualTransformation = UrlUserTagTransformation(MaterialTheme.colorScheme.primary),
+                        outputTransformation = UrlUserTagOutputTransformation(MaterialTheme.colorScheme.primary),
                         keyboardOptions =
                             KeyboardOptions.Default.copy(
                                 capitalization = KeyboardCapitalization.Sentences,

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/discover/nip23LongForm/LongFormPostViewModel.kt

@@ -700,7 +700,7 @@ class LongFormPostViewModel :
     override fun updateZapFromText() {
         viewModelScope.launch(Dispatchers.IO) {
             val tagger =
-                NewMessageTagger(message.text, emptyList(), emptyList(), accountViewModel)
+                NewMessageTagger(message.text.toString(), emptyList(), emptyList(), accountViewModel)
             tagger.run()
             tagger.pTags?.forEach { taggedUser ->
                 if (!forwardZapTo.value.items.any { it.key == taggedUser }) {

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/geohash/GeoHashPostScreen.kt

@@ -23,7 +23,7 @@ package com.vitorpamplona.amethyst.ui.screen.loggedIn.geohash
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.ui.platform.LocalContext
-import androidx.compose.ui.text.input.TextFieldValue
+import androidx.compose.foundation.text.input.setTextAndPlaceCursorAtEnd
 import androidx.core.net.toUri
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.vitorpamplona.amethyst.ui.actions.uploads.SelectedMedia
@@ -67,7 +67,8 @@ fun GeoHashPostScreen(
             postViewModel.quote(it)
         }
         message?.ifBlank { null }?.let {
-            postViewModel.updateMessage(TextFieldValue(it))
+            postViewModel.message.setTextAndPlaceCursorAtEnd(it)
+            postViewModel.onMessageChanged()
         }
         attachment?.ifBlank { null }?.toUri()?.let {
             withContext(Dispatchers.IO) {

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/hashtag/HashtagPostScreen.kt

@@ -23,7 +23,7 @@ package com.vitorpamplona.amethyst.ui.screen.loggedIn.hashtag
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.ui.platform.LocalContext
-import androidx.compose.ui.text.input.TextFieldValue
+import androidx.compose.foundation.text.input.setTextAndPlaceCursorAtEnd
 import androidx.core.net.toUri
 import androidx.lifecycle.viewmodel.compose.viewModel
 import com.vitorpamplona.amethyst.ui.actions.uploads.SelectedMedia
@@ -67,7 +67,8 @@ fun HashtagPostScreen(
             postViewModel.quote(it)
         }
         message?.ifBlank { null }?.let {
-            postViewModel.updateMessage(TextFieldValue(it))
+            postViewModel.message.setTextAndPlaceCursorAtEnd(it)
+            postViewModel.onMessageChanged()
         }
         attachment?.ifBlank { null }?.toUri()?.let {
             withContext(Dispatchers.IO) {

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/home/ShortNotePostScreen.kt

@@ -55,7 +55,7 @@ import androidx.compose.runtime.collectAsState
 import androidx.compose.ui.Alignment.Companion.CenterVertically
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalContext
-import androidx.compose.ui.text.input.TextFieldValue
+import androidx.compose.foundation.text.input.setTextAndPlaceCursorAtEnd
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
 import androidx.core.net.toUri
@@ -150,7 +150,8 @@ fun ShortNotePostScreen(
         val draft = draftId?.let { accountViewModel.getNoteIfExists(it) }
         postViewModel.load(baseReplyTo, quote, fork, version, draft)
         message?.ifBlank { null }?.let {
-            postViewModel.updateMessage(TextFieldValue(it))
+            postViewModel.message.setTextAndPlaceCursorAtEnd(it)
+            postViewModel.onMessageChanged()
         }
         attachment?.ifBlank { null }?.toUri()?.let {
             withContext(Dispatchers.IO) {

amethyst/src/main/java/com/vitorpamplona/amethyst/ui/screen/loggedIn/home/ShortNotePostViewModel.kt

@@ -30,6 +30,7 @@ import androidx.compose.runtime.setValue
 import androidx.compose.runtime.snapshots.SnapshotStateMap
 import androidx.compose.foundation.text.input.TextFieldState
 import androidx.compose.foundation.text.input.setTextAndPlaceCursorAtEnd
+import androidx.compose.ui.text.input.TextFieldValue
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import com.vitorpamplona.amethyst.Amethyst