Move search state into ToolControls and PromptControls, search response in history

- ToolControls and PromptControls now manage searchText as local state
  and filter their lists internally (matches on name + title/description)
- Removed searchText/onSearchChange props from ToolsScreen, PromptsScreen,
  and their associated stories
- HistoryListPanel search now also matches against stringified response
  payloads

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

clients/web/src/components/screens/PromptsScreen/PromptsScreen.stories.tsx

@@ -8,8 +8,6 @@ const meta: Meta<typeof PromptsScreen> = {
   component: PromptsScreen,
   parameters: { layout: "fullscreen" },
   args: {
-    searchText: "",
-    onSearchChange: fn(),
     onRefreshList: fn(),
     onSelectPrompt: fn(),
     onArgumentChange: fn(),

clients/web/src/components/screens/PromptsScreen/PromptsScreen.tsx

@@ -23,8 +23,6 @@ export interface PromptsScreenProps {
   selectedPrompt?: SelectedPrompt;
   messages?: PromptMessagesDisplayProps;
   listChanged: boolean;
-  searchText: string;
-  onSearchChange: (text: string) => void;
   onRefreshList: () => void;
   onSelectPrompt: (name: string) => void;
   onArgumentChange: (name: string, value: string) => void;
@@ -64,8 +62,6 @@ export function PromptsScreen({
   selectedPrompt,
   messages,
   listChanged,
-  searchText,
-  onSearchChange,
   onRefreshList,
   onSelectPrompt,
   onArgumentChange,
@@ -78,8 +74,6 @@ export function PromptsScreen({
           <PromptControls
             prompts={prompts}
             listChanged={listChanged}
-            searchText={searchText}
-            onSearchChange={onSearchChange}
             onRefreshList={onRefreshList}
             onSelectPrompt={onSelectPrompt}
           />