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/markdown/renderer.tsx

@@ -25,6 +25,7 @@ import { StyleSheet, withUnistyles } from "react-native-unistyles";
 import { AppearanceStyleBoundary } from "@/components/appearance-style-boundary";
 import { HighlightedCodeBlock } from "@/components/highlighted-code-block";
 import { MarkdownParagraphView, MarkdownTextSpan } from "@/components/markdown-text";
+import { MarkdownTableCellText } from "@/components/markdown-text-selection";
 import { getMarkdownListMarker, getMarkdownListSpacing } from "@/utils/markdown-list";
 import { markdownNodeContainsType } from "@/utils/markdown-ast";
 import { createCompactMarkdownStyles, createMarkdownStyles } from "@/styles/markdown-styles";
@@ -661,6 +662,16 @@ export function createSharedMarkdownRules(): RenderRules {
         </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[],