Fix theme input scrollbar line, jumbo emoji, zalgo clip, and Windows autocorrect dupe.

Make twilight/mocha scrollbar tracks transparent so the editor no longer shows a vertical strip, size standalone emoji to 100px, loosen zalgo clipping with padded overflow, and handle insertReplacementText via onDOMBeforeInput so Slate does not insert the correction twice.

src/app/components/editor/Editor.tsx

@@ -6,12 +6,11 @@ import React, {
   forwardRef,
   useCallback,
   useState,
-  useEffect,
-  useRef,
 } from 'react';
 import { Box, Scroll, Text } from 'folds';
 import { Descendant, Editor, createEditor, Transforms, Range, Element as SlateElement, Text as SlateText, Point } from 'slate';
 import {
+  ReactEditor,
   Slate,
   Editable,
   withReact,
@@ -172,48 +171,41 @@ export const CustomEditor = forwardRef<HTMLDivElement, CustomEditorProps>(
       [editor, onKeyDown]
     );
 
-    const handleBeforeInput = useCallback(
-      (event: Event) => {
-        const inputEvent = event as InputEvent;
-        
-        // Handle autocorrect replacement that causes text duplication
-        if (inputEvent.inputType === 'insertReplacementText' || 
-            inputEvent.inputType === 'insertFromComposition') {
-          const { selection } = editor;
-          if (!selection) return;
+    /**
+     * Spellcheck / right-click autocorrect (insertReplacementText).
+     * Must run as Editable's onDOMBeforeInput and return true so Slate skips its
+     * own insert — slate-react ignores event.defaultPrevented when this prop is unset,
+     * which previously duplicated the corrected word (especially on Windows Electron).
+     */
+    const handleDOMBeforeInput = useCallback(
+      (event: InputEvent) => {
+        if (event.inputType !== 'insertReplacementText') return false;
 
-          // Get the data being inserted
-          const data = inputEvent.data || inputEvent.dataTransfer?.getData('text/plain');
-          
-          if (data) {
-            event.preventDefault();
-            
-            // If there's selected text, delete it first
-            if (selection && !Range.isCollapsed(selection)) {
-              Transforms.delete(editor, { at: selection });
-            }
-            
-            // Insert the replacement text
-            editor.insertText(data);
+        const data =
+          event.dataTransfer?.getData('text/plain') || event.data || '';
+        if (!data) return false;
+
+        event.preventDefault();
+
+        const [targetRange] = event.getTargetRanges();
+        if (targetRange) {
+          const slateRange = ReactEditor.toSlateRange(editor, targetRange, {
+            exactMatch: false,
+            suppressThrow: true,
+          });
+          if (slateRange) {
+            Transforms.select(editor, slateRange);
           }
+        } else if (editor.selection && !Range.isCollapsed(editor.selection)) {
+          Transforms.delete(editor, { at: editor.selection });
         }
+
+        Transforms.insertText(editor, data);
+        return true;
       },
       [editor]
     );
 
-    const editableRef = useRef<HTMLDivElement>(null);
-
-    useEffect(() => {
-      const editableElement = editableRef.current?.querySelector('[data-slate-editor="true"]');
-      if (!editableElement) return;
-
-      editableElement.addEventListener('beforeinput', handleBeforeInput, { capture: true });
-      
-      return () => {
-        editableElement.removeEventListener('beforeinput', handleBeforeInput, { capture: true });
-      };
-    }, [handleBeforeInput]);
-
     const renderPlaceholder = useCallback(
       ({ attributes, children }: RenderPlaceholderProps) => (
         <span {...attributes} className={css.EditorPlaceholderContainer}>
@@ -259,7 +251,6 @@ export const CustomEditor = forwardRef<HTMLDivElement, CustomEditorProps>(
               size="300"
               visibility="Hover"
               hideTrack
-              ref={editableRef}
             >
               <Editable
                 data-editable-name={editableName}
@@ -269,6 +260,7 @@ export const CustomEditor = forwardRef<HTMLDivElement, CustomEditorProps>(
                 renderElement={renderElement}
                 renderLeaf={renderLeaf}
                 decorate={decorate}
+                onDOMBeforeInput={handleDOMBeforeInput}
                 onKeyDown={handleKeydown}
                 onKeyUp={onKeyUp}
                 onPaste={onPaste}

src/app/components/message/Reply.css.ts

@@ -35,6 +35,8 @@ export const ReplyContent = style({
   overflow: 'clip',
   overflowY: 'clip',
   lineHeight: '1.5',
+  paddingBlock: toRem(4),
+  marginBlock: toRem(-4),
   selectors: {
     [`${Reply}:hover &`]: {
       opacity: config.opacity.P500,

src/app/components/message/layout/layout.css.ts

@@ -1,6 +1,7 @@
 import { createVar, keyframes, style, styleVariants } from '@vanilla-extract/css';
 import { recipe, RecipeVariants } from '@vanilla-extract/recipes';
 import { DefaultReset, color, config, toRem } from 'folds';
+import * as htmlCss from '../../../styles/CustomHtml.css';
 
 export const StickySection = style({
   position: 'sticky',
@@ -212,9 +213,12 @@ export const UsernameBold = style({
 export const MessageTextBody = recipe({
   base: {
     wordBreak: 'break-word',
+    // Clip zalgo/combining marks with room so normal text + emoji aren't shaved
     overflow: 'clip',
     overflowY: 'clip',
     lineHeight: '1.5',
+    padding: toRem(20),
+    margin: toRem(-20),
     userSelect: 'text',
     WebkitUserSelect: 'text',
   },
@@ -226,8 +230,27 @@ export const MessageTextBody = recipe({
     },
     jumboEmoji: {
       true: {
-        fontSize: '1.504em',
-        lineHeight: '1.4962em',
+        fontSize: toRem(100),
+        lineHeight: toRem(100),
+        selectors: {
+          [`& .${htmlCss.EmoticonBase}`]: {
+            height: toRem(100),
+            padding: 0,
+            verticalAlign: 'bottom',
+          },
+          [`& .${htmlCss.Emoticon.classNames.base}`]: {
+            fontSize: toRem(100),
+            height: toRem(100),
+            minWidth: toRem(100),
+            lineHeight: toRem(100),
+            top: 0,
+          },
+          [`& .${htmlCss.EmoticonImg}`]: {
+            height: toRem(100),
+            width: toRem(100),
+            objectFit: 'contain',
+          },
+        },
       },
     },
     emote: {

src/app/styles/CustomHtml.css.ts

@@ -19,7 +19,7 @@ export const MarginSpaced = style({
 export const Paragraph = style([
   DefaultReset,
   {
-    overflow: 'hidden',
+    // Zalgo clipping is handled by MessageTextBody padding + overflow
     lineHeight: '1.5',
   },
 ]);
@@ -29,7 +29,6 @@ export const Heading = style([
   MarginSpaced,
   {
     marginTop: config.space.S400,
-    overflow: 'hidden',
     lineHeight: '1.5',
     selectors: {
       '&:first-child': {
@@ -46,7 +45,6 @@ export const BlockQuote = style([
     paddingLeft: config.space.S200,
     borderLeft: `${config.borderWidth.B700} solid ${color.SurfaceVariant.ContainerLine}`,
     fontStyle: 'italic',
-    overflow: 'hidden',
     lineHeight: '1.5',
   },
 ]);
@@ -73,7 +71,6 @@ export const Code = style([
   {
     padding: `0 ${config.space.S100}`,
     display: 'inline',
-    overflow: 'hidden',
     lineHeight: '1.5',
   },
 ]);
@@ -120,7 +117,6 @@ export const Spoiler = recipe({
       padding: `0 ${config.space.S100}`,
       backgroundColor: color.SurfaceVariant.ContainerActive,
       borderRadius: config.radii.R300,
-      overflow: 'hidden',
       lineHeight: '1.5',
       selectors: {
         '&[aria-pressed=true]': {
@@ -182,7 +178,6 @@ export const List = style([
   {
     padding: `0 ${config.space.S100}`,
     paddingLeft: config.space.S600,
-    overflow: 'hidden',
     lineHeight: '1.5',
   },
 ]);
@@ -211,7 +206,6 @@ export const Mention = recipe({
       padding: `0 ${toRem(2)}`,
       borderRadius: config.radii.R300,
       fontWeight: config.fontWeight.W500,
-      overflow: 'hidden',
       lineHeight: '1.5',
     },
   ],
@@ -238,7 +232,6 @@ export const Command = recipe({
       padding: `0 ${toRem(2)}`,
       borderRadius: config.radii.R300,
       fontWeight: config.fontWeight.W500,
-      overflow: 'hidden',
       lineHeight: '1.5',
     },
   ],
@@ -308,7 +301,6 @@ export const highlightText = style([
   {
     backgroundColor: 'yellow',
     color: 'black',
-    overflow: 'hidden',
     lineHeight: '1.5',
   },
 ]);

src/index.css

@@ -257,7 +257,7 @@ body.mocha-theme {
 }
 
 .twilight-theme ::-webkit-scrollbar-track {
-  background: rgba(20, 18, 31, 0.5);
+  background: transparent;
 }
 
 .twilight-theme ::-webkit-scrollbar-thumb {
@@ -355,7 +355,7 @@ body.mocha-theme {
 }
 
 .mocha-theme ::-webkit-scrollbar-track {
-  background: rgba(26, 22, 20, 0.5);
+  background: transparent;
 }
 
 .mocha-theme ::-webkit-scrollbar-thumb {