fix(happy-app): hide internal Claude Code ToolSearch from UI

Add hidden property to knownTools so internal tools like ToolSearch
render nothing instead of showing raw INPUT/OUTPUT JSON.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: bra1nDump

packages/happy-app/sources/components/tools/ToolView.tsx

@@ -44,6 +44,11 @@ export const ToolView = React.memo<ToolViewProps>((props) => {
 
     let knownTool = knownTools[tool.name as keyof typeof knownTools] as any;
 
+    // Internal Claude Code tools (e.g. ToolSearch) are completely hidden from the UI
+    if (knownTool?.hidden) {
+        return null;
+    }
+
     let description: string | null = null;
     let status: string | null = null;
     let minimal = false;

packages/happy-app/sources/components/tools/knownTools.tsx

@@ -935,12 +935,18 @@ export const knownTools = {
             }
             return null;
         }
+    },
+    // Internal Claude Code tool for loading deferred tools - no user-visible output
+    'ToolSearch': {
+        icon: ICON_SEARCH,
+        hidden: true,
     }
 } satisfies Record<string, {
     title?: string | ((opts: { metadata: Metadata | null, tool: ToolCall }) => string);
     icon: (size: number, color: string) => React.ReactNode;
     noStatus?: boolean;
     hideDefaultError?: boolean;
+    hidden?: boolean;
     isMutable?: boolean;
     input?: z.ZodObject<any>;
     result?: z.ZodObject<any>;

packages/happy-cli/src/agent/acp/runAcp.ts

@@ -104,7 +104,7 @@ function formatTextForConsole(text: string): string {
   return JSON.stringify(truncateForConsole(toSingleLine(text), ACP_EVENT_PREVIEW_CHARS));
 }
 
-function formatOptionalDetail(text: string | undefined, limit = ACP_EVENT_PREVIEW_CHARS): string {
+function formatOptionalDetail(text: string | null | undefined, limit = ACP_EVENT_PREVIEW_CHARS): string {
   if (!text) {
     return '';
   }