Optimize icon picker for mobile with responsive sizing (#12275)

* Increase emoji picker cell size on mobile

Mobile uses a 40px button with a 32px emoji glyph (vs. 32px / 24px on
desktop), so roughly 8 emojis fit across a typical phone screen for
easier touch targeting.

https://claude.ai/code/session_017Rrv75Rc6eZ7eb2iNpZxpu

* tweaks

---------

Co-authored-by: Claude <noreply@anthropic.com>

app/components/IconPicker/components/GridTemplate.tsx

@@ -6,15 +6,21 @@ import { IconType } from "@shared/types";
 import { IconLibrary } from "@shared/utils/IconLibrary";
 import { Emoji } from "~/components/Emoji";
 import Text from "~/components/Text";
+import useMobile from "~/hooks/useMobile";
 import { TRANSLATED_CATEGORIES } from "../utils";
 import Grid from "./Grid";
 import { IconButton } from "./IconButton";
 import { CustomEmoji } from "@shared/components/CustomEmoji";
 
 /**
- * icon/emoji size is 24px; and we add 4px padding on all sides,
+ * Desktop: 24px icon/emoji + 4px padding on all sides = 32px button.
+ * Mobile: 32px icon/emoji + 4px padding on all sides = 40px button, so
+ * roughly 8 emojis fit across a typical phone screen.
  */
-const BUTTON_SIZE = 32;
+const BUTTON_SIZE_DESKTOP = 32;
+const BUTTON_SIZE_MOBILE = 40;
+const ICON_SIZE_DESKTOP = 24;
+const ICON_SIZE_MOBILE = 32;
 
 type OutlineNode = {
   type: IconType.SVG;
@@ -53,8 +59,11 @@ const GridTemplate = (
   { width, height, data, empty, onIconSelect }: Props,
   ref: React.Ref<HTMLDivElement>
 ) => {
+  const isMobile = useMobile();
+  const buttonSize = isMobile ? BUTTON_SIZE_MOBILE : BUTTON_SIZE_DESKTOP;
+  const iconSize = isMobile ? ICON_SIZE_MOBILE : ICON_SIZE_DESKTOP;
   // 24px padding for the Grid Container
-  const itemsPerRow = Math.floor((width - 24) / BUTTON_SIZE);
+  const itemsPerRow = Math.max(1, Math.floor((width - 24) / buttonSize));
 
   const gridItems = compact(
     data.flatMap((node) => {
@@ -84,7 +93,11 @@ const GridTemplate = (
               onClick={() => onIconSelect({ id: item.name, value: item.name })}
               style={{ "--delay": `${item.delay}ms` } as React.CSSProperties}
             >
-              <Icon as={IconLibrary.getComponent(item.name)} color={item.color}>
+              <Icon
+                as={IconLibrary.getComponent(item.name)}
+                color={item.color}
+                size={iconSize}
+              >
                 {item.initial}
               </Icon>
             </IconButton>
@@ -96,7 +109,11 @@ const GridTemplate = (
             key={item.id}
             onClick={() => onIconSelect({ id: item.id, value: item.value })}
           >
-            <Emoji width={24} height={24}>
+            <Emoji
+              width={iconSize}
+              height={iconSize}
+              size={isMobile ? iconSize : undefined}
+            >
               {item.type === IconType.Custom ? (
                 <CustomEmoji value={item.value} title={item.name} />
               ) : (
@@ -119,7 +136,7 @@ const GridTemplate = (
       height={height}
       data={gridItems}
       columns={itemsPerRow}
-      itemWidth={BUTTON_SIZE}
+      itemWidth={buttonSize}
     />
   );
 };

app/components/IconPicker/components/IconButton.tsx

@@ -1,5 +1,5 @@
 import styled from "styled-components";
-import { s, hover } from "@shared/styles";
+import { breakpoints, s, hover } from "@shared/styles";
 import NudeButton from "~/components/NudeButton";
 
 export const IconButton = styled(NudeButton)<{ delay?: number }>`
@@ -10,4 +10,9 @@ export const IconButton = styled(NudeButton)<{ delay?: number }>`
   &: ${hover} {
     background: ${s("listItemHoverBackground")};
   }
+
+  @media (max-width: ${breakpoints.tablet - 1}px) {
+    width: 40px;
+    height: 40px;
+  }
 `;

app/components/IconPicker/index.tsx

@@ -79,7 +79,9 @@ const IconPicker = ({
 
   const [activeTab, setActiveTab] = React.useState<TabName>(defaultTab);
 
-  const popoverWidth = isMobile ? windowWidth : POPOVER_WIDTH;
+  // The Drawer's inner content has 6px padding on each side; subtract it
+  // so the panel doesn't overflow horizontally and itemsPerRow is correct.
+  const popoverWidth = isMobile ? windowWidth - 12 : POPOVER_WIDTH;
 
   const handleTabChange = React.useCallback((value: string) => {
     setActiveTab(value as TabName);

app/scenes/Document/components/DocumentTitle.tsx

@@ -297,7 +297,7 @@ const StyledIconPicker = styled(IconPicker)`
 const Title = styled(ContentEditable)<TitleProps>`
   position: relative;
   line-height: ${lineHeight};
-  margin-top: ${(props: TitleProps) => (props.$containsIcon ? "10vh" : "3vh")};
+  margin-top: 8vh;
   margin-bottom: 0.5em;
   font-size: ${fontSize};
   font-weight: 600;