fix(chat): keep large tables responsive on iOS

Selectable table cells each installed a window-level gesture recognizer, causing every touch to fan out across the entire table. Keep prose selectable while rendering iOS table text without selection.

packages/app/src/components/message.tsx

@@ -12,6 +12,7 @@ import {
 } from "react-native";
 import { useTranslation } from "react-i18next";
 import { MarkdownParagraphView, MarkdownTextSpan } from "@/components/markdown-text";
+import { MarkdownTableCellText } from "@/components/markdown-text-selection";
 import * as React from "react";
 import {
   useState,
@@ -1825,6 +1826,16 @@ export const AssistantMessage = memo(function AssistantMessage({
           </View>
         );
       },
+      th: (node: ASTNode, children: ReactNode[], _parent: ASTNode[], styles: MarkdownStyles) => (
+        <MarkdownTableCellText key={node.key}>
+          <View style={styles._VIEW_SAFE_th}>{children}</View>
+        </MarkdownTableCellText>
+      ),
+      td: (node: ASTNode, children: ReactNode[], _parent: ASTNode[], styles: MarkdownStyles) => (
+        <MarkdownTableCellText key={node.key}>
+          <View style={styles._VIEW_SAFE_td}>{children}</View>
+        </MarkdownTableCellText>
+      ),
       paragraph: (
         node: ASTNode,
         children: ReactNode[],