Consolidate tab persistence logic into Tabs component

- Move active tab persistence into Tabs component with storageKey + activeTabKey props
- Change value prop to defaultValue so callers don't manage tab state
- Add TabsRef with setActiveTab method for programmatic tab switching
- Restore request_pane.focus_tab listener for :param placeholder clicks
- Update all Tab consumers to use new pattern

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src-web/components/FolderSettingsDialog.tsx

@@ -1,6 +1,6 @@
 import { createWorkspaceModel, foldersAtom, patchModel } from '@yaakapp-internal/models';
 import { useAtomValue } from 'jotai';
-import { useMemo, useState } from 'react';
+import { useMemo } from 'react';
 import { useAuthTab } from '../hooks/useAuthTab';
 import { useEnvironmentsBreakdown } from '../hooks/useEnvironmentsBreakdown';
 import { useHeadersTab } from '../hooks/useHeadersTab';
@@ -37,7 +37,6 @@ export type FolderSettingsTab =
 export function FolderSettingsDialog({ folderId, tab }: Props) {
   const folders = useAtomValue(foldersAtom);
   const folder = folders.find((f) => f.id === folderId) ?? null;
-  const [activeTab, setActiveTab] = useState<string>(tab ?? TAB_GENERAL);
   const authTab = useAuthTab(TAB_AUTH, folder);
   const headersTab = useHeadersTab(TAB_HEADERS, folder);
   const inheritedHeaders = useInheritedHeaders(folder);
@@ -69,8 +68,7 @@ export function FolderSettingsDialog({ folderId, tab }: Props) {
 
   return (
     <Tabs
-      value={activeTab}
+      defaultValue={tab ?? TAB_GENERAL}
-      onChangeValue={setActiveTab}
       label="Folder Settings"
       className="pt-2 pb-2 pl-3 pr-1"
       layout="horizontal"

src-web/components/GrpcRequestPane.tsx

@@ -7,7 +7,6 @@ import { useContainerSize } from '../hooks/useContainerQuery';
 import type { ReflectResponseService } from '../hooks/useGrpc';
 import { useHeadersTab } from '../hooks/useHeadersTab';
 import { useInheritedHeaders } from '../hooks/useInheritedHeaders';
-import { useKeyValue } from '../hooks/useKeyValue';
 import { useRequestUpdateKey } from '../hooks/useRequestUpdateKey';
 import { resolvedModelName } from '../lib/resolvedModelName';
 import { Button } from './core/Button';
@@ -69,11 +68,6 @@ export function GrpcRequestPane({
   const authTab = useAuthTab(TAB_AUTH, activeRequest);
   const metadataTab = useHeadersTab(TAB_METADATA, activeRequest, 'Metadata');
   const inheritedHeaders = useInheritedHeaders(activeRequest);
-  const { value: activeTabs, set: setActiveTabs } = useKeyValue<Record<string, string>>({
-    namespace: 'no_sync',
-    key: 'grpcRequestActiveTabs',
-    fallback: {},
-  });
   const forceUpdateKey = useRequestUpdateKey(activeRequest.id ?? null);
 
   const urlContainerEl = useRef<HTMLDivElement>(null);
@@ -145,14 +139,6 @@ export function GrpcRequestPane({
     [activeRequest.description, authTab, metadataTab],
   );
 
-  const activeTab = activeTabs?.[activeRequest.id];
-  const setActiveTab = useCallback(
-    async (tab: string) => {
-      await setActiveTabs((r) => ({ ...r, [activeRequest.id]: tab }));
-    },
-    [activeRequest.id, setActiveTabs],
-  );
-
   const handleMetadataChange = useCallback(
     (metadata: HttpRequestHeader[]) => patchModel(activeRequest, { metadata }),
     [activeRequest],
@@ -265,12 +251,11 @@ export function GrpcRequestPane({
         </HStack>
       </div>
       <Tabs
-        value={activeTab}
         label="Request"
-        onChangeValue={setActiveTab}
         tabs={tabs}
         tabListClassName="mt-1 !mb-1.5"
-        storageKey="grpc_request_tabs_order"
+        storageKey="grpc_request_tabs"
+        activeTabKey={activeRequest.id}
       >
         <TabContent value="message">
           <GrpcEditor

src-web/components/HttpRequestPane.tsx

@@ -4,7 +4,7 @@ import type { GenericCompletionOption } from '@yaakapp-internal/plugins';
 import classNames from 'classnames';
 import { atom, useAtomValue } from 'jotai';
 import type { CSSProperties } from 'react';
-import { lazy, Suspense, useCallback, useMemo, useState } from 'react';
+import { lazy, Suspense, useCallback, useMemo, useRef, useState } from 'react';
 import { activeRequestIdAtom } from '../hooks/useActiveRequestId';
 import { allRequestsAtom } from '../hooks/useAllRequests';
 import { useAuthTab } from '../hooks/useAuthTab';
@@ -12,7 +12,6 @@ import { useCancelHttpResponse } from '../hooks/useCancelHttpResponse';
 import { useHeadersTab } from '../hooks/useHeadersTab';
 import { useImportCurl } from '../hooks/useImportCurl';
 import { useInheritedHeaders } from '../hooks/useInheritedHeaders';
-import { useKeyValue } from '../hooks/useKeyValue';
 import { usePinnedHttpResponse } from '../hooks/usePinnedHttpResponse';
 import { useRequestEditor, useRequestEditorEvent } from '../hooks/useRequestEditor';
 import { useRequestUpdateKey } from '../hooks/useRequestUpdateKey';
@@ -42,8 +41,8 @@ import { Editor } from './core/Editor/LazyEditor';
 import { InlineCode } from './core/InlineCode';
 import type { Pair } from './core/PairEditor';
 import { PlainInput } from './core/PlainInput';
-import type { TabItem } from './core/Tabs/Tabs';
+import type { TabItem, TabsRef } from './core/Tabs/Tabs';
-import { TabContent, Tabs } from './core/Tabs/Tabs';
+import { setActiveTab, TabContent, Tabs } from './core/Tabs/Tabs';
 import { EmptyStateText } from './EmptyStateText';
 import { FormMultipartEditor } from './FormMultipartEditor';
 import { FormUrlencodedEditor } from './FormUrlencodedEditor';
@@ -70,6 +69,7 @@ const TAB_PARAMS = 'params';
 const TAB_HEADERS = 'headers';
 const TAB_AUTH = 'auth';
 const TAB_DESCRIPTION = 'description';
+const TABS_STORAGE_KEY = 'http_request_tabs';
 
 const nonActiveRequestUrlsAtom = atom((get) => {
   const activeRequestId = get(activeRequestIdAtom);
@@ -83,19 +83,20 @@ const memoNotActiveRequestUrlsAtom = deepEqualAtom(nonActiveRequestUrlsAtom);
 
 export function HttpRequestPane({ style, fullHeight, className, activeRequest }: Props) {
   const activeRequestId = activeRequest.id;
-  const { value: activeTabs, set: setActiveTabs } = useKeyValue<Record<string, string>>({
+  const tabsRef = useRef<TabsRef>(null);
-    namespace: 'no_sync',
-    key: 'httpRequestActiveTabs',
-    fallback: {},
-  });
   const [forceUpdateHeaderEditorKey, setForceUpdateHeaderEditorKey] = useState<number>(0);
   const forceUpdateKey = useRequestUpdateKey(activeRequest.id ?? null);
-  const [{ urlKey }, { focusParamsTab, forceUrlRefresh, forceParamsRefresh }] = useRequestEditor();
+  const [{ urlKey }, { forceUrlRefresh, forceParamsRefresh }] = useRequestEditor();
   const contentType = getContentTypeFromHeaders(activeRequest.headers);
   const authTab = useAuthTab(TAB_AUTH, activeRequest);
   const headersTab = useHeadersTab(TAB_HEADERS, activeRequest);
   const inheritedHeaders = useInheritedHeaders(activeRequest);
 
+  // Listen for event to focus the params tab (e.g., when clicking a :param in the URL)
+  useRequestEditorEvent('request_pane.focus_tab', () => {
+    tabsRef.current?.setActiveTab(TAB_PARAMS);
+  }, []);
+
   const handleContentTypeChange = useCallback(
     async (contentType: string | null, patch: Partial<Omit<HttpRequest, 'headers'>> = {}) => {
       if (activeRequest == null) {
@@ -260,18 +261,6 @@ export function HttpRequestPane({ style, fullHeight, className, activeRequest }:
     [activeRequest],
   );
 
-  const activeTab = activeTabs?.[activeRequestId];
-  const setActiveTab = useCallback(
-    async (tab: string) => {
-      await setActiveTabs((r) => ({ ...r, [activeRequest.id]: tab }));
-    },
-    [activeRequest.id, setActiveTabs],
-  );
-
-  useRequestEditorEvent('request_pane.focus_tab', async () => {
-    await setActiveTab(TAB_PARAMS);
-  });
-
   const autocompleteUrls = useAtomValue(memoNotActiveRequestUrlsAtom);
 
   const autocomplete: GenericCompletionConfig = useMemo(
@@ -298,7 +287,11 @@ export function HttpRequestPane({ style, fullHeight, className, activeRequest }:
           e.preventDefault(); // Prevent input onChange
 
           await patchModel(activeRequest, patch);
-          focusParamsTab();
+          await setActiveTab({
+            storageKey: TABS_STORAGE_KEY,
+            activeTabKey: activeRequestId,
+            value: TAB_PARAMS,
+          });
 
           // Wait for request to update, then refresh the UI
           // TODO: Somehow make this deterministic
@@ -309,14 +302,7 @@ export function HttpRequestPane({ style, fullHeight, className, activeRequest }:
         }
       }
     },
-    [
+    [activeRequest, activeRequestId, forceParamsRefresh, forceUrlRefresh, importCurl],
-      activeRequest,
-      activeRequestId,
-      focusParamsTab,
-      forceParamsRefresh,
-      forceUrlRefresh,
-      importCurl,
-    ],
   );
   const handleSend = useCallback(
     () => sendRequest(activeRequest.id ?? null),
@@ -354,12 +340,12 @@ export function HttpRequestPane({ style, fullHeight, className, activeRequest }:
             isLoading={activeResponse != null && activeResponse.state !== 'closed'}
           />
           <Tabs
-            value={activeTab}
+            ref={tabsRef}
             label="Request"
-            onChangeValue={setActiveTab}
             tabs={tabs}
             tabListClassName="mt-1 -mb-1.5"
-            storageKey="http_request_tabs_order"
+            storageKey={TABS_STORAGE_KEY}
+            activeTabKey={activeRequestId}
           >
             <TabContent value={TAB_AUTH}>
               <HttpAuthenticationEditor model={activeRequest} />

src-web/components/HttpResponsePane.tsx

@@ -1,8 +1,7 @@
 import type { HttpResponse } from '@yaakapp-internal/models';
 import classNames from 'classnames';
 import type { ComponentType, CSSProperties } from 'react';
-import { lazy, Suspense, useCallback, useMemo } from 'react';
+import { lazy, Suspense, useMemo } from 'react';
-import { useLocalStorage } from 'react-use';
 import { useCancelHttpResponse } from '../hooks/useCancelHttpResponse';
 import { useHttpResponseEvents } from '../hooks/useHttpResponseEvents';
 import { usePinnedHttpResponse } from '../hooks/usePinnedHttpResponse';
@@ -58,10 +57,6 @@ const TAB_TIMELINE = 'timeline';
 export function HttpResponsePane({ style, className, activeRequestId }: Props) {
   const { activeResponse, setPinnedResponseId, responses } = usePinnedHttpResponse(activeRequestId);
   const [viewMode, setViewMode] = useResponseViewMode(activeResponse?.requestId);
-  const [activeTabs, setActiveTabs] = useLocalStorage<Record<string, string>>(
-    'responsePaneActiveTabs',
-    {},
-  );
   const contentType = getContentTypeFromHeaders(activeResponse?.headers ?? null);
   const mimeType = contentType == null ? null : getMimeTypeFromContentType(contentType).essence;
 
@@ -129,13 +124,6 @@ export function HttpResponsePane({ style, className, activeRequestId }: Props) {
       viewMode,
     ],
   );
-  const activeTab = activeTabs?.[activeRequestId];
-  const setActiveTab = useCallback(
-    (tab: string) => {
-      setActiveTabs((r) => ({ ...r, [activeRequestId]: tab }));
-    },
-    [activeRequestId, setActiveTabs],
-  );
 
   const cancel = useCancelHttpResponse(activeResponse?.id ?? null);
 
@@ -199,14 +187,12 @@ export function HttpResponsePane({ style, className, activeRequestId }: Props) {
             )}
             {/* Show tabs if we have any data (headers, body, etc.) even if there's an error */}
             <Tabs
-              key={activeRequestId} // Freshen tabs on request change
-              value={activeTab}
-              onChangeValue={setActiveTab}
               tabs={tabs}
               label="Response"
               className="ml-3 mr-3 mb-3 min-h-0 flex-1"
               tabListClassName="mt-0.5 -mb-1.5"
-              storageKey="http_response_tabs_order"
+              storageKey="http_response_tabs"
+              activeTabKey={activeRequestId}
             >
               <TabContent value={TAB_BODY}>
                 <ErrorBoundary name="Http Response Viewer">

src-web/components/Settings/Settings.tsx

@@ -5,7 +5,6 @@ import { useLicense } from '@yaakapp-internal/license';
 import { pluginsAtom, settingsAtom } from '@yaakapp-internal/models';
 import classNames from 'classnames';
 import { useAtomValue } from 'jotai';
-import { useState } from 'react';
 import { useKeyPressEvent } from 'react-use';
 import { appInfo } from '../../lib/appInfo';
 import { capitalize } from '../../lib/capitalize';
@@ -51,7 +50,6 @@ export default function Settings({ hide }: Props) {
   const { tab: tabFromQuery } = useSearch({ from: '/workspaces/$workspaceId/settings' });
   // Parse tab and subtab (e.g., "plugins:installed")
   const [mainTab, subtab] = tabFromQuery?.split(':') ?? [];
-  const [tab, setTab] = useState<string | undefined>(mainTab || tabFromQuery);
   const settings = useAtomValue(settingsAtom);
   const plugins = useAtomValue(pluginsAtom);
   const licenseCheck = useLicense();
@@ -91,11 +89,10 @@ export default function Settings({ hide }: Props) {
       )}
       <Tabs
         layout="horizontal"
-        value={tab}
+        defaultValue={mainTab || tabFromQuery}
         addBorders
         tabListClassName="min-w-[10rem] bg-surface x-theme-sidebar border-r border-border pl-3"
         label="Settings"
-        onChangeValue={setTab}
         tabs={tabs.map(
           (value): TabItem => ({
             value,
@@ -145,7 +142,7 @@ export default function Settings({ hide }: Props) {
           <SettingsHotkeys />
         </TabContent>
         <TabContent value={TAB_PLUGINS} className="h-full grid grid-rows-1 px-6 !py-4">
-          <SettingsPlugins defaultSubtab={tab === TAB_PLUGINS ? subtab : undefined} />
+          <SettingsPlugins defaultSubtab={mainTab === TAB_PLUGINS ? subtab : undefined} />
         </TabContent>
         <TabContent value={TAB_PROXY} className="overflow-y-auto h-full px-6 !py-4">
           <SettingsProxy />

src-web/components/Settings/SettingsPlugins.tsx

@@ -54,13 +54,11 @@ export function SettingsPlugins({ defaultSubtab }: SettingsPluginsProps) {
   const installedPlugins = plugins.filter((p) => !isPluginBundled(p, appInfo.vendoredPluginDir));
   const createPlugin = useInstallPlugin();
   const refreshPlugins = useRefreshPlugins();
-  const [tab, setTab] = useState<string | undefined>(defaultSubtab);
   return (
     <div className="h-full">
       <Tabs
-        value={tab}
+        defaultValue={defaultSubtab}
         label="Plugins"
-        onChangeValue={setTab}
         addBorders
         tabs={[
           { label: 'Discover', value: 'search' },

src-web/components/WebsocketRequestPane.tsx

@@ -5,7 +5,7 @@ import { closeWebsocket, connectWebsocket, sendWebsocket } from '@yaakapp-intern
 import classNames from 'classnames';
 import { atom, useAtomValue } from 'jotai';
 import type { CSSProperties } from 'react';
-import { useCallback, useMemo } from 'react';
+import { useCallback, useMemo, useRef } from 'react';
 import { getActiveCookieJar } from '../hooks/useActiveCookieJar';
 import { getActiveEnvironment } from '../hooks/useActiveEnvironment';
 import { activeRequestIdAtom } from '../hooks/useActiveRequestId';
@@ -14,7 +14,6 @@ import { useAuthTab } from '../hooks/useAuthTab';
 import { useCancelHttpResponse } from '../hooks/useCancelHttpResponse';
 import { useHeadersTab } from '../hooks/useHeadersTab';
 import { useInheritedHeaders } from '../hooks/useInheritedHeaders';
-import { useKeyValue } from '../hooks/useKeyValue';
 import { usePinnedHttpResponse } from '../hooks/usePinnedHttpResponse';
 import { activeWebsocketConnectionAtom } from '../hooks/usePinnedWebsocketConnection';
 import { useRequestEditor, useRequestEditorEvent } from '../hooks/useRequestEditor';
@@ -30,8 +29,8 @@ import { Editor } from './core/Editor/LazyEditor';
 import { IconButton } from './core/IconButton';
 import type { Pair } from './core/PairEditor';
 import { PlainInput } from './core/PlainInput';
-import type { TabItem } from './core/Tabs/Tabs';
+import type { TabItem, TabsRef } from './core/Tabs/Tabs';
-import { TabContent, Tabs } from './core/Tabs/Tabs';
+import { setActiveTab, TabContent, Tabs } from './core/Tabs/Tabs';
 import { HeadersEditor } from './HeadersEditor';
 import { HttpAuthenticationEditor } from './HttpAuthenticationEditor';
 import { MarkdownEditor } from './MarkdownEditor';
@@ -50,6 +49,7 @@ const TAB_PARAMS = 'params';
 const TAB_HEADERS = 'headers';
 const TAB_AUTH = 'auth';
 const TAB_DESCRIPTION = 'description';
+const TABS_STORAGE_KEY = 'websocket_request_tabs';
 
 const nonActiveRequestUrlsAtom = atom((get) => {
   const activeRequestId = get(activeRequestIdAtom);
@@ -63,17 +63,18 @@ const memoNotActiveRequestUrlsAtom = deepEqualAtom(nonActiveRequestUrlsAtom);
 
 export function WebsocketRequestPane({ style, fullHeight, className, activeRequest }: Props) {
   const activeRequestId = activeRequest.id;
-  const { value: activeTabs, set: setActiveTabs } = useKeyValue<Record<string, string>>({
+  const tabsRef = useRef<TabsRef>(null);
-    namespace: 'no_sync',
-    key: 'websocketRequestActiveTabs',
-    fallback: {},
-  });
   const forceUpdateKey = useRequestUpdateKey(activeRequest.id);
-  const [{ urlKey }, { focusParamsTab, forceUrlRefresh, forceParamsRefresh }] = useRequestEditor();
+  const [{ urlKey }, { forceUrlRefresh, forceParamsRefresh }] = useRequestEditor();
   const authTab = useAuthTab(TAB_AUTH, activeRequest);
   const headersTab = useHeadersTab(TAB_HEADERS, activeRequest);
   const inheritedHeaders = useInheritedHeaders(activeRequest);
 
+  // Listen for event to focus the params tab (e.g., when clicking a :param in the URL)
+  useRequestEditorEvent('request_pane.focus_tab', () => {
+    tabsRef.current?.setActiveTab(TAB_PARAMS);
+  }, []);
+
   const { urlParameterPairs, urlParametersKey } = useMemo(() => {
     const placeholderNames = Array.from(activeRequest.url.matchAll(/\/(:[^/]+)/g)).map(
       (m) => m[1] ?? '',
@@ -115,18 +116,6 @@ export function WebsocketRequestPane({ style, fullHeight, className, activeReque
   const { mutate: cancelResponse } = useCancelHttpResponse(activeResponse?.id ?? null);
   const connection = useAtomValue(activeWebsocketConnectionAtom);
 
-  const activeTab = activeTabs?.[activeRequestId];
-  const setActiveTab = useCallback(
-    async (tab: string) => {
-      await setActiveTabs((r) => ({ ...r, [activeRequest.id]: tab }));
-    },
-    [activeRequest.id, setActiveTabs],
-  );
-
-  useRequestEditorEvent('request_pane.focus_tab', async () => {
-    await setActiveTab(TAB_PARAMS);
-  });
-
   const autocompleteUrls = useAtomValue(memoNotActiveRequestUrlsAtom);
 
   const autocomplete: GenericCompletionConfig = useMemo(
@@ -176,7 +165,11 @@ export function WebsocketRequestPane({ style, fullHeight, className, activeReque
         e.preventDefault(); // Prevent input onChange
 
         await patchModel(activeRequest, patch);
-        focusParamsTab();
+        await setActiveTab({
+          storageKey: TABS_STORAGE_KEY,
+          activeTabKey: activeRequestId,
+          value: TAB_PARAMS,
+        });
 
         // Wait for request to update, then refresh the UI
         // TODO: Somehow make this deterministic
@@ -186,7 +179,7 @@ export function WebsocketRequestPane({ style, fullHeight, className, activeReque
         }, 100);
       }
     },
-    [activeRequest, focusParamsTab, forceParamsRefresh, forceUrlRefresh],
+    [activeRequest, activeRequestId, forceParamsRefresh, forceUrlRefresh],
   );
 
   const messageLanguage = languageFromContentType(null, activeRequest.message);
@@ -229,12 +222,12 @@ export function WebsocketRequestPane({ style, fullHeight, className, activeReque
             />
           </div>
           <Tabs
-            value={activeTab}
+            ref={tabsRef}
             label="Request"
-            onChangeValue={setActiveTab}
             tabs={tabs}
             tabListClassName="mt-1 !mb-1.5"
-            storageKey="websocket_request_tabs_order"
+            storageKey={TABS_STORAGE_KEY}
+            activeTabKey={activeRequestId}
           >
             <TabContent value={TAB_AUTH}>
               <HttpAuthenticationEditor model={activeRequest} />

src-web/components/WorkspaceSettingsDialog.tsx

@@ -1,6 +1,5 @@
 import { patchModel, workspaceMetasAtom, workspacesAtom } from '@yaakapp-internal/models';
 import { useAtomValue } from 'jotai';
-import { useState } from 'react';
 import { useAuthTab } from '../hooks/useAuthTab';
 import { useHeadersTab } from '../hooks/useHeadersTab';
 import { useInheritedHeaders } from '../hooks/useInheritedHeaders';
@@ -45,7 +44,6 @@ const DEFAULT_TAB: WorkspaceSettingsTab = TAB_GENERAL;
 export function WorkspaceSettingsDialog({ workspaceId, hide, tab }: Props) {
   const workspace = useAtomValue(workspacesAtom).find((w) => w.id === workspaceId);
   const workspaceMeta = useAtomValue(workspaceMetasAtom).find((m) => m.workspaceId === workspaceId);
-  const [activeTab, setActiveTab] = useState<string>(tab ?? DEFAULT_TAB);
   const authTab = useAuthTab(TAB_AUTH, workspace ?? null);
   const headersTab = useHeadersTab(TAB_HEADERS, workspace ?? null);
   const inheritedHeaders = useInheritedHeaders(workspace ?? null);
@@ -67,8 +65,7 @@ export function WorkspaceSettingsDialog({ workspaceId, hide, tab }: Props) {
 
   return (
     <Tabs
-      value={activeTab}
+      defaultValue={tab ?? DEFAULT_TAB}
-      onChangeValue={setActiveTab}
       label="Folder Settings"
       className="pt-4 pb-2 px-3"
       tabListClassName="pl-4"
@@ -90,7 +87,7 @@ export function WorkspaceSettingsDialog({ workspaceId, hide, tab }: Props) {
             ) : null,
         },
       ]}
-      storageKey="workspace_settings_tabs_order"
+      storageKey="workspace_settings_tabs"
     >
       <TabContent value={TAB_AUTH} className="overflow-y-auto h-full px-4">
         <HttpAuthenticationEditor model={workspace} />

src-web/components/core/Tabs/Tabs.tsx

@@ -10,8 +10,8 @@ import {
   useSensors,
 } from '@dnd-kit/core';
 import classNames from 'classnames';
-import type { ReactNode } from 'react';
+import type { ReactNode, Ref } from 'react';
-import { memo, useCallback, useEffect, useMemo, useRef, useState } from 'react';
+import { forwardRef, memo, useCallback, useEffect, useImperativeHandle, useMemo, useRef, useState } from 'react';
 import { useKeyValue } from '../../../hooks/useKeyValue';
 import { computeSideForDragMove } from '../../../lib/dnd';
 import { DropMarker } from '../../DropMarker';
@@ -37,22 +37,37 @@ export type TabItem =
       rightSlot?: ReactNode;
     };
 
+interface TabsStorage {
+  order: string[];
+  activeTabs: Record<string, string>;
+}
+
+export interface TabsRef {
+  /** Programmatically set the active tab */
+  setActiveTab: (value: string) => void;
+}
+
 interface Props {
   label: string;
-  value?: string;
+  /** Default tab value. If not provided, defaults to first tab. */
-  onChangeValue: (value: string) => void;
+  defaultValue?: string;
+  /** Called when active tab changes */
+  onChangeValue?: (value: string) => void;
   tabs: TabItem[];
   tabListClassName?: string;
   className?: string;
   children: ReactNode;
   addBorders?: boolean;
   layout?: 'horizontal' | 'vertical';
+  /** Storage key for persisting tab order and active tab. When provided, enables drag-to-reorder and active tab persistence. */
   storageKey?: string | string[];
+  /** Key to identify which context this tab belongs to (e.g., request ID). Used for per-context active tab persistence. */
+  activeTabKey?: string;
 }
 
-export function Tabs({
+export const Tabs = forwardRef<TabsRef, Props>(function Tabs({
-  value,
+  defaultValue,
-  onChangeValue,
+  onChangeValue: onChangeValueProp,
   label,
   children,
   tabs: originalTabs,
@@ -61,17 +76,74 @@ export function Tabs({
   addBorders,
   layout = 'vertical',
   storageKey,
-}: Props) {
+  activeTabKey,
+}: Props, forwardedRef: Ref<TabsRef>) {
   const ref = useRef<HTMLDivElement | null>(null);
   const reorderable = !!storageKey;
 
   // Use key-value storage for persistence if storageKey is provided
-  const { value: savedOrder, set: setSavedOrder } = useKeyValue<string[]>({
+  // Handle migration from old format (string[]) to new format (TabsStorage)
-    namespace: 'global',
+  const { value: rawStorage, set: setStorage } = useKeyValue<TabsStorage | string[]>({
-    key: storageKey ?? ['tabs_order', 'default'],
+    namespace: 'no_sync',
-    fallback: [],
+    key: storageKey ?? ['tabs', 'default'],
+    fallback: { order: [], activeTabs: {} },
   });
 
+  // Migrate old format (string[]) to new format (TabsStorage)
+  const storage: TabsStorage = Array.isArray(rawStorage)
+    ? { order: rawStorage, activeTabs: {} }
+    : rawStorage ?? { order: [], activeTabs: {} };
+
+  const savedOrder = storage.order;
+
+  // Get the active tab value - prefer storage (if activeTabKey), then defaultValue, then first tab
+  const storedActiveTab = activeTabKey ? storage?.activeTabs?.[activeTabKey] : undefined;
+  const [internalValue, setInternalValue] = useState<string | undefined>(undefined);
+  const value = storedActiveTab ?? internalValue ?? defaultValue ?? originalTabs[0]?.value;
+
+  // Helper to normalize storage (handle migration from old format)
+  const normalizeStorage = useCallback(
+    (s: TabsStorage | string[]): TabsStorage =>
+      Array.isArray(s) ? { order: s, activeTabs: {} } : s,
+    [],
+  );
+
+  // Handle tab change - update internal state, storage if we have a key, and call prop callback
+  const onChangeValue = useCallback(
+    async (newValue: string) => {
+      setInternalValue(newValue);
+      if (storageKey && activeTabKey) {
+        await setStorage((s) => {
+          const normalized = normalizeStorage(s);
+          return {
+            ...normalized,
+            activeTabs: { ...normalized.activeTabs, [activeTabKey]: newValue },
+          };
+        });
+      }
+      onChangeValueProp?.(newValue);
+    },
+    [storageKey, activeTabKey, setStorage, onChangeValueProp, normalizeStorage],
+  );
+
+  // Expose imperative methods via ref
+  useImperativeHandle(forwardedRef, () => ({
+    setActiveTab: (value: string) => {
+      onChangeValue(value);
+    },
+  }), [onChangeValue]);
+
+  // Helper to save order
+  const setSavedOrder = useCallback(
+    async (order: string[]) => {
+      await setStorage((s) => {
+        const normalized = normalizeStorage(s);
+        return { ...normalized, order };
+      });
+    },
+    [setStorage, normalizeStorage],
+  );
+
   // State for ordered tabs
   const [orderedTabs, setOrderedTabs] = useState<TabItem[]>(originalTabs);
   const [isDragging, setIsDragging] = useState<TabItem | null>(null);
@@ -112,8 +184,6 @@ export function Tabs({
 
   const tabs = storageKey ? orderedTabs : originalTabs;
 
-  value = value ?? tabs[0]?.value;
-
   // Update tabs when value changes
   useEffect(() => {
     const tabs = ref.current?.querySelectorAll<HTMLDivElement>('[data-tab]');
@@ -320,7 +390,7 @@ export function Tabs({
       {children}
     </div>
   );
-}
+});
 
 interface TabButtonProps {
   tab: TabItem;
@@ -329,7 +399,7 @@ interface TabButtonProps {
   layout: 'horizontal' | 'vertical';
   reorderable: boolean;
   isDragging: boolean;
-  onChangeValue: (value: string) => void;
+  onChangeValue?: (value: string) => void;
   overlay?: boolean;
 }
 
@@ -373,7 +443,7 @@ function TabButton({
       ? undefined
       : (e: React.MouseEvent) => {
           e.preventDefault(); // Prevent dropdown from opening on first click
-          onChangeValue(tab.value);
+          onChangeValue?.(tab.value);
         },
     className: classNames(
       'flex items-center rounded whitespace-nowrap',
@@ -478,3 +548,32 @@ export const TabContent = memo(function TabContent({
     </ErrorBoundary>
   );
 });
+
+/**
+ * Programmatically set the active tab for a Tabs component that uses storageKey + activeTabKey.
+ * This is useful when you need to change the tab from outside the component (e.g., in response to an event).
+ */
+export async function setActiveTab({
+  storageKey,
+  activeTabKey,
+  value,
+}: {
+  storageKey: string;
+  activeTabKey: string;
+  value: string;
+}): Promise<void> {
+  const { getKeyValue, setKeyValue } = await import('../../../lib/keyValueStore');
+  const current = getKeyValue<TabsStorage>({
+    namespace: 'no_sync',
+    key: storageKey,
+    fallback: { order: [], activeTabs: {} },
+  });
+  await setKeyValue({
+    namespace: 'no_sync',
+    key: storageKey,
+    value: {
+      ...current,
+      activeTabs: { ...current.activeTabs, [activeTabKey]: value },
+    },
+  });
+}

src-web/components/responseViewers/MultipartViewer.tsx

@@ -1,5 +1,5 @@
 import { type MultipartPart, parseMultipart } from '@mjackson/multipart-parser';
-import { lazy, Suspense, useMemo, useState } from 'react';
+import { lazy, Suspense, useMemo } from 'react';
 import { languageFromContentType } from '../../lib/contentType';
 import { Banner } from '../core/Banner';
 import { Icon } from '../core/Icon';
@@ -22,8 +22,6 @@ interface Props {
 }
 
 export function MultipartViewer({ data, boundary, idPrefix = 'multipart' }: Props) {
-  const [tab, setTab] = useState<string>();
-
   const parseResult = useMemo(() => {
     try {
       const maxFileSize = 1024 * 1024 * 10; // 10MB
@@ -55,12 +53,10 @@ export function MultipartViewer({ data, boundary, idPrefix = 'multipart' }: Prop
 
   return (
     <Tabs
-      value={tab}
       addBorders
       label="Multipart"
       layout="horizontal"
       tabListClassName="border-r border-r-border"
-      onChangeValue={setTab}
       tabs={parts.map((part) => ({
         label: part.name ?? '',
         value: part.name ?? '',

src-web/hooks/useRequestEditor.tsx

@@ -34,7 +34,7 @@ export function useRequestEditor() {
   const focusParamValue = useCallback(
     (name: string) => {
       focusParamsTab();
-      setTimeout(() => emitter.emit('request_params.focus_value', name), 50);
+      requestAnimationFrame(() => emitter.emit('request_params.focus_value', name));
     },
     [focusParamsTab],
   );