fix: surface Claude Grep results in search detail body

The Claude SDK delivers Grep tool_result content as a plain string, which
claude-agent.ts wraps as { output: <string> } for unrecognized tools. The
canonical ToolGrepOutputSchema requires structured fields, so parsing fell
through to an unknown detail and the UI rendered only the redundant query.

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

@@ -382,15 +382,6 @@ interface SearchDetail {
 
 function buildSearchSections(detail: SearchDetail, ds: DetailStyles): ReactNode[] {
   const out: ReactNode[] = [];
-  if (detail.query) {
-    out.push(
-      <View key="search-query" style={styles.section}>
-        <Text selectable style={styles.scrollText}>
-          {detail.query}
-        </Text>
-      </View>,
-    );
-  }
   if (detail.content) {
     out.push(
       <View key="search-content" style={styles.section}>

packages/server/src/server/agent/providers/claude-agent.redesign.test.ts

@@ -620,6 +620,56 @@ test("maps tool_result content shapes into deterministic string output", async (
   }
 });
 
+test("Grep tool_result string content flows to a search detail with content", async () => {
+  const session = await createSession();
+  const internal = session as unknown as {
+    buildToolOutput: (
+      block: Record<string, unknown>,
+      entry: Record<string, unknown> | undefined,
+    ) => Record<string, unknown> | undefined;
+  };
+
+  const grepEntry = {
+    id: "tool-grep-1",
+    name: "Grep",
+    server: "Grep",
+    classification: "search",
+    started: true,
+    input: { pattern: "MaskedView", output_mode: "files_with_matches" },
+  };
+
+  try {
+    const output = internal.buildToolOutput(
+      {
+        type: "tool_result",
+        tool_use_id: "tool-grep-1",
+        tool_name: "Grep",
+        content: "Found 2 files\nsrc/foo.tsx\nsrc/bar.tsx",
+        is_error: false,
+      },
+      grepEntry,
+    );
+
+    const { mapClaudeCompletedToolCall } = await import("./claude/tool-call-mapper.js");
+    const item = mapClaudeCompletedToolCall({
+      callId: "tool-grep-1",
+      name: "Grep",
+      input: grepEntry.input,
+      output: output ?? null,
+    });
+
+    expect(item?.detail).toEqual({
+      type: "search",
+      query: "MaskedView",
+      toolName: "grep",
+      content: "Found 2 files\nsrc/foo.tsx\nsrc/bar.tsx",
+      numFiles: 0,
+    });
+  } finally {
+    await session.close();
+  }
+});
+
 test("completes a foreground run when only system metadata arrives before the first assistant message", async () => {
   let step = 0;
   sdkQueryFactory.mockImplementation(() =>

packages/server/src/server/agent/providers/claude/tool-call-detail-parser.ts

@@ -25,6 +25,16 @@ import {
   toolDetailBranchByName,
 } from "../tool-call-detail-primitives.js";
 
+const ClaudeGrepOutputSchema = z
+  .union([
+    ToolGrepOutputSchema,
+    z
+      .object({ output: z.string() })
+      .passthrough()
+      .transform(({ output }) => ({ numFiles: 0, filenames: [], content: output })),
+  ])
+  .nullable();
+
 const ClaudeToolEnvelopeSchema = z
   .object({
     name: z.string().min(1),
@@ -128,17 +138,11 @@ const ClaudeToolDetailPass2Schema = z.union([
   toolDetailBranchByName("search", ToolSearchInputSchema, z.unknown(), (input) =>
     toSearchToolDetail({ input, toolName: "search" }),
   ),
-  toolDetailBranchByName(
-    "Grep",
-    ToolSearchInputSchema,
-    ToolGrepOutputSchema.nullable(),
-    (input, output) => toSearchToolDetail({ input, output, toolName: "grep" }),
+  toolDetailBranchByName("Grep", ToolSearchInputSchema, ClaudeGrepOutputSchema, (input, output) =>
+    toSearchToolDetail({ input, output, toolName: "grep" }),
   ),
-  toolDetailBranchByName(
-    "grep",
-    ToolSearchInputSchema,
-    ToolGrepOutputSchema.nullable(),
-    (input, output) => toSearchToolDetail({ input, output, toolName: "grep" }),
+  toolDetailBranchByName("grep", ToolSearchInputSchema, ClaudeGrepOutputSchema, (input, output) =>
+    toSearchToolDetail({ input, output, toolName: "grep" }),
   ),
   toolDetailBranchByName(
     "Glob",

packages/server/src/server/agent/providers/claude/tool-call-mapper.test.ts

@@ -310,6 +310,25 @@ describe("claude tool-call mapper", () => {
     });
   });
 
+  it("maps Grep calls when output arrives as the claude-agent string wrapper", () => {
+    const item = expectMapped(
+      mapClaudeCompletedToolCall({
+        callId: "claude-grep-string-1",
+        name: "Grep",
+        input: { pattern: "MaskedView", output_mode: "files_with_matches" },
+        output: { output: "Found 2 files\nsrc/foo.tsx\nsrc/bar.tsx" },
+      }),
+    );
+
+    expect(item.detail).toEqual({
+      type: "search",
+      query: "MaskedView",
+      toolName: "grep",
+      content: "Found 2 files\nsrc/foo.tsx\nsrc/bar.tsx",
+      numFiles: 0,
+    });
+  });
+
   it("maps WebSearch calls with structured results", () => {
     const item = expectMapped(
       mapClaudeCompletedToolCall({