feat(app): add text selection and fix shell error display

- Add selectable prop to all Text components in tool call content areas
- Add ShellErrorResultSchema to parse tool_result error format
- Update ShellToolCallSchema to extract content from error results
- Also handle tool_result extraction in formatValue as fallback

packages/app/src/components/tool-call-details.tsx

@@ -27,6 +27,19 @@ function formatValue(value: unknown): string {
   if (typeof value === "string") {
     return value;
   }
+  // Extract content from tool_result objects
+  if (
+    typeof value === "object" &&
+    value !== null &&
+    "type" in value &&
+    (value as { type: string }).type === "tool_result" &&
+    "content" in value
+  ) {
+    const content = (value as { content: unknown }).content;
+    if (typeof content === "string") {
+      return content;
+    }
+  }
   try {
     return JSON.stringify(value, null, 2);
   } catch {
@@ -66,7 +79,7 @@ export function ToolCallDetailsContent({
           contentContainerStyle={styles.jsonContent}
           showsHorizontalScrollIndicator={true}
         >
-          <Text style={styles.scrollText}>{display.command}</Text>
+          <Text selectable style={styles.scrollText}>{display.command}</Text>
         </ScrollView>
         {display.output ? (
           <ScrollView
@@ -80,7 +93,7 @@ export function ToolCallDetailsContent({
               nestedScrollEnabled
               showsHorizontalScrollIndicator={true}
             >
-              <Text style={styles.scrollText}>{display.output}</Text>
+              <Text selectable style={styles.scrollText}>{display.output}</Text>
             </ScrollView>
           </ScrollView>
         ) : null}
@@ -126,7 +139,7 @@ export function ToolCallDetailsContent({
               nestedScrollEnabled
               showsHorizontalScrollIndicator={true}
             >
-              <Text style={styles.scrollText}>{display.content}</Text>
+              <Text selectable style={styles.scrollText}>{display.content}</Text>
             </ScrollView>
           </ScrollView>
         ) : null}
@@ -151,7 +164,7 @@ export function ToolCallDetailsContent({
               contentContainerStyle={styles.jsonContent}
               showsHorizontalScrollIndicator={true}
             >
-              <Text style={styles.scrollText}>{pair.value}</Text>
+              <Text selectable style={styles.scrollText}>{pair.value}</Text>
             </ScrollView>
           </View>
         );
@@ -175,7 +188,7 @@ export function ToolCallDetailsContent({
               contentContainerStyle={styles.jsonContent}
               showsHorizontalScrollIndicator={true}
             >
-              <Text style={styles.scrollText}>{pair.value}</Text>
+              <Text selectable style={styles.scrollText}>{pair.value}</Text>
             </ScrollView>
           </View>
         );
@@ -195,7 +208,7 @@ export function ToolCallDetailsContent({
           contentContainerStyle={styles.jsonContent}
           showsHorizontalScrollIndicator={true}
         >
-          <Text style={[styles.scrollText, styles.errorText]}>
+          <Text selectable style={[styles.scrollText, styles.errorText]}>
             {errorText}
           </Text>
         </ScrollView>

packages/app/src/utils/tool-call-parsers.ts

@@ -900,6 +900,13 @@ const ShellResultSchema = z.object({
   output: z.string(),
 }).passthrough();
 
+// Shell error result: { type: "tool_result", content: "Exit code 128\n...", is_error: true }
+const ShellErrorResultSchema = z.object({
+  type: z.literal("tool_result"),
+  content: z.string(),
+  is_error: z.literal(true),
+}).passthrough();
+
 // Shell tool call display schema
 const ShellToolCallSchema = z
   .object({
@@ -911,13 +918,30 @@ const ShellToolCallSchema = z
       ? data.input.command.join(" ")
       : data.input.command;
 
+    // Try parsing as success result first
     const resultParsed = ShellResultSchema.safeParse(data.result);
-    const output = resultParsed.success ? resultParsed.data.output : "";
+    if (resultParsed.success) {
+      return {
+        type: "shell" as const,
+        command,
+        output: resultParsed.data.output,
+      };
+    }
+
+    // Try parsing as error result
+    const errorParsed = ShellErrorResultSchema.safeParse(data.result);
+    if (errorParsed.success) {
+      return {
+        type: "shell" as const,
+        command,
+        output: errorParsed.data.content,
+      };
+    }
 
     return {
       type: "shell" as const,
       command,
-      output,
+      output: "",
     };
   });