feat(app): prompt to delete when clearing a message edit (#2687)

fluxer_app/src/features/channel/components/LexicalChannelTextareaContent.tsx

@@ -92,7 +92,11 @@ import {CloudUpload} from '@app/features/messaging/upload/CloudUpload';
 import {canAttachFilesInChannel} from '@app/features/messaging/utils/AttachmentPermissionUtils';
 import {openFilePicker} from '@app/features/messaging/utils/FilePickerUtils';
 import * as FileUploadUtils from '@app/features/messaging/utils/FileUploadUtils';
-import {getComposerMessageContent, hasVisibleMessageContent} from '@app/features/messaging/utils/MessageRequestUtils';
+import {
+	canSubmitComposerContent,
+	getComposerMessageContent,
+	hasVisibleMessageContent,
+} from '@app/features/messaging/utils/MessageRequestUtils';
 import type {MentionSegment} from '@app/features/messaging/utils/TextareaSegmentManager';
 import {
 	resolveTypedEmojiShortcodes,
@@ -715,11 +719,15 @@ export const LexicalChannelTextareaContent = observer(
 		const showAttachments = hasAttachments;
 		const showStickers = hasPendingSticker;
 		const isOverCharacterLimit = composerMessageContent.length > maxMessageLength;
-		const canSubmit =
-			!textareaInputDisabled &&
-			!isSubmissionBlockedBySlowmode &&
-			!isOverCharacterLimit &&
-			(hasMessageContent || hasAttachments || hasPendingSticker);
+		const canSubmit = canSubmitComposerContent({
+			inputDisabled: textareaInputDisabled,
+			isSubmissionBlockedBySlowmode,
+			isOverCharacterLimit,
+			hasMessageContent,
+			hasAttachments,
+			hasPendingSticker,
+			isEditingMessageOnMobile,
+		});
 		const {onSubmit} = useTextareaSubmit({
 			channelId: channel.id,
 			guildId: channel.guildId === undefined ? null : channel.guildId,

fluxer_app/src/features/channel/components/UserMessage.tsx

@@ -30,6 +30,7 @@ import {hasStyleableMessageText} from '@app/features/messaging/utils/FailedMessa
 import {
 	buildExistingAttachmentEditReferences,
 	canSubmitEmptyMessageEdit,
+	isAttachmentOnlyMessage,
 } from '@app/features/messaging/utils/MessageEditContentUtils';
 import {retryFailedMessage} from '@app/features/messaging/utils/MessageRetryUtils';
 import {NodeType} from '@app/features/messaging/utils/markdown/parser/Enums';
@@ -196,11 +197,11 @@ export const UserMessage = observer(() => {
 			}
 			const content = dropTrailingEmptyBlockquoteLines(actualContent ?? '').trim();
 			if (!content) {
+				if (isAttachmentOnlyMessage(message)) {
+					finishEditing();
+					return;
+				}
 				if (canSubmitEmptyMessageEdit(message)) {
-					if (message.content.length === 0) {
-						finishEditing();
-						return;
-					}
 					finishEditing();
 					void MessageCommands.edit(
 						channel.id,