refactor(serializer): avoid generic catch for invalid query

* fix(copy-button): use focus-independent clipboard copy

navigator.clipboard.writeText requires document focus and rejects with
"Document is not focused" in remote-desktop/VDI/multi-monitor setups.
Copy through react-use's useCopyToClipboard (execCommand) via a colocated
useCopyButton hook that also owns the transient "copied" state.

Fixes SIGNOZ-UI-5J4

* refactor(legend): reuse CopyButton for the copy action

Replace the duplicated inline copy button with the shared CopyButton.
Each button now owns its own copied state, so the per-item id tracking
is no longer needed.

* chore(hooks): remove unused useCopyToClipboard hook

No longer imported after CopyButton and the legend moved to
useCopyButton.

frontend/docs/authz-guide.md

@@ -0,0 +1,136 @@
+# AuthZ Guide
+
+How to structure a page so it works with the permission system.
+
+We are migrating from the `ADMIN | EDITOR | VIEWER` roles to per-action checks. Instead of granting `VIEWER` and
+exposing everything, a user can now be granted access to a single resource, eg: `Logs` only.
+
+- [Prerequisites](#prerequisites)
+- [Core rules](#core-rules)
+- [Page patterns](#page-patterns)
+- [What "blocked" means](#what-blocked-means)
+- [Migration checklist](#migration-checklist)
+- [Testing](#testing)
+
+## Prerequisites
+
+Check whether the resource your page represents is supported: see
+[permissions.type.ts](../src/lib/authz/hooks/useAuthZ/permissions.type.ts) for the current resources and their allowed
+verbs.
+
+**If the resource is not listed there, skip authz for now**. The backend does not enforce it yet, so any frontend
+check would be decorative. Revisit once the resource is generated into that file (it is auto-generated from the
+backend).
+
+## Core rules
+
+These hold for every page. The per-pattern sections below only add to them.
+
+1. **A page is always reachable, regardless of permission.** The intended action must be known before permission can
+   be checked, so the route renders first and individual pieces are gated.
+2. **`update` requires both `read` and `update`.** A user who can write but cannot read the current value must not get
+   an edit affordance.
+3. **`delete` is independent of `read`.** Delete controls stay visible for a user who holds `delete` but not `read`.
+4. **Never gate per row.** If a user can `list`, render every row. Check `read` only when the row is opened (drawer or
+   detail route).
+5. **Gate the narrowest thing that works**, a button over a section, a section over a page.
+6. **A resource may be gated while a sub-resource is not.** A user without `read` on Service Accounts can still hold
+   `create` on API Keys, so blocking the outer container would hide work they are allowed to do.
+7. **Verbs not covered here** (`attach`, `detach`, `assignee`) behave like `delete`: gate the control that triggers
+   them, not the surrounding content.
+
+## Page patterns
+
+### List page
+
+![Visual rules for structuring a list page](./assets/list-example.svg)
+
+Without `list`, but with any of `read` / `create` / `update`, only the table is blocked:
+
+- Title, description, search filters and action buttons stay visible.
+- Filters and any control that drives the table are non-interactive.
+- The create button stays enabled if the user holds `create`.
+
+### Edit page
+
+![Visual rules for structuring an edit page](./assets/edit-example.svg)
+
+Without `read`:
+
+- Block the content with `withAuthZContent`, not the whole route.
+- Keep delete visible (rule 3).
+- Keep update blocked (rule 2).
+
+### Drawer
+
+![Visual rules for structuring a drawer](./assets/drawer-example.svg)
+
+Without `read`:
+
+- Block the drawer body, not the drawer itself.
+- Prefer routing that carries the resource ID in the URL, so delete stays reachable without `read`.
+- Keep update blocked (rule 2).
+- Watch for sub-resources the user may still be allowed to act on (rule 6).
+
+### Create
+
+Without `create`:
+
+| Entry point           | Gate with                                                     |
+| --------------------- | ------------------------------------------------------------- |
+| Button                | `AuthZButton`                                                 |
+| Dedicated create page | `withAuthZPage`                                               |
+| Create drawer opened directly (deep link) | `withAuthZContent` on the body + `AuthZButton` on footer actions |
+
+### Delete
+
+Gate the control with `AuthZButton`, or `AuthZTooltip` for a non-button trigger such as an icon or menu item.
+
+### Quick filters
+
+![Visual rules for structuring a page with quick filters](./assets/quick-filters-example.svg)
+
+## What "blocked" means
+
+Blocking is always a visible denial, never a silent removal. Use the components in
+[`lib/authz/components`](../src/lib/authz/components/README.md) rather than hand-rolling a check, they carry the
+denial message and the loading state.
+
+| Scope           | Component                                 | Denied state                                |
+| --------------- | ----------------------------------------- | ------------------------------------------- |
+| Button          | `AuthZButton`                             | Disabled + tooltip                          |
+| Any element      | `AuthZTooltip`                            | Disabled child + tooltip                    |
+| Section         | `withAuthZContent` / `AuthZGuardContent`  | Inline `PermissionDeniedCallout`            |
+| Page / route    | `withAuthZPage` / `AuthZGuardPage`        | `PermissionDeniedFullPage`                  |
+| Custom fallback | `withAuthZ` / `AuthZGuard`                | Whatever you pass as `fallback`             |
+
+Prefer the HOC (`withAuthZ*`); reach for the JSX guard (`AuthZGuard*`) when the gate depends on conditional rendering
+and an HOC cannot express it. The components README has the full decision tree and how to build the `checks` array.
+
+## Migration checklist
+
+Use the existing components. Create a new one only if none fit.
+
+- [ ] Can I apply a `withAuthZ*` variant directly, or must I extract the content into a component first?
+  - If extraction is needed, declare the new content component in the same file to keep the diff small, then move it
+    to its own file in a follow-up commit or PR.
+- [ ] Is the layout structured to respect the [core rules](#core-rules)?
+  - If not, raise it in the frontend Slack channel before reshaping the page.
+- [ ] Am I gating a shared component rather than a page or section?
+  - If so, it must stay functional with no permission. Example: the Query Builder works without field suggestions when
+    the user cannot read them.
+
+## Testing
+
+### Devtool
+
+Press `Cmd + K` (`Ctrl + K` on Windows/Linux) to open the shortcuts, search for `AuthZ`, and pick the first
+result. The devtool simulates granted and denied permissions across the UI.
+
+Available only in local development, it is stripped from production builds.
+
+### Unit tests
+
+[`lib/authz/utils/README.md`](../src/lib/authz/utils/README.md) covers the `*.authz.test.tsx` naming convention, the
+MSW handlers (`setupAuthzAdmin`, `setupAuthzDenyAll`, `setupAuthzDeny`, `setupAuthzAllow`,
+`setupAuthzGrantByPrefix`), and how to test the loading state.

frontend/src/components/CeleryTask/useNavigateToExplorer.ts

@@ -6,6 +6,10 @@ import { PANEL_TYPES } from 'constants/queryBuilder';
 import ROUTES from 'constants/routes';
 import useUpdatedQuery from 'container/GridCardLayout/useResolveQuery';
 import { useQueryBuilder } from 'hooks/queryBuilder/useQueryBuilder';
+import {
+	applySerializedParams,
+	serialize,
+} from 'lib/compositeQuery/serializer';
 import { useNotifications } from 'hooks/useNotifications';
 import { useDashboardStore } from 'providers/Dashboard/store/useDashboardStore';
 import { AppState } from 'store/reducers';
@@ -124,15 +128,13 @@ export function useNavigateToExplorer(): (
 					});
 			}
 
-			const JSONCompositeQuery = encodeURIComponent(JSON.stringify(preparedQuery));
+			applySerializedParams(serialize(preparedQuery), urlParams);
 
 			const basePath =
 				dataSource === DataSource.TRACES
 					? ROUTES.TRACES_EXPLORER
 					: ROUTES.LOGS_EXPLORER;
-			const newExplorerPath = `${basePath}?${urlParams.toString()}&${
-				QueryParams.compositeQuery
-			}=${JSONCompositeQuery}`;
+			const newExplorerPath = `${basePath}?${urlParams.toString()}`;
 
 			window.open(withBasePath(newExplorerPath), sameTab ? '_self' : '_blank');
 		},

frontend/src/components/LogDetail/index.tsx

@@ -32,6 +32,7 @@ import { useQueryBuilder } from 'hooks/queryBuilder/useQueryBuilder';
 import { useIsDarkMode } from 'hooks/useDarkMode';
 import { useNotifications } from 'hooks/useNotifications';
 import { useSafeNavigate } from 'hooks/useSafeNavigate';
+import { serializeToParams } from 'lib/compositeQuery/serializer';
 import createQueryParams from 'lib/createQueryParams';
 import { cloneDeep } from 'lodash-es';
 import {
@@ -252,7 +253,7 @@ function LogDetailInner({
 			[QueryParams.activeLogId]: `"${log?.id}"`,
 			[QueryParams.startTime]: minTime?.toString() || '',
 			[QueryParams.endTime]: maxTime?.toString() || '',
-			[QueryParams.compositeQuery]: JSON.stringify(
+			...serializeToParams(
 				updateAllQueriesOperators(
 					initialQueriesMap[DataSource.LOGS],
 					PANEL_TYPES.LIST,
@@ -438,7 +439,11 @@ function LogDetailInner({
 			destroyOnClose
 			closeIcon={<X size={16} style={{ marginTop: Spacing.MARGIN_1 }} />}
 		>
-			<div className="log-detail-drawer__content" data-log-detail-ignore="true">
+			<div
+				className="log-detail-drawer__content"
+				data-log-detail-ignore="true"
+				data-testid="log-detail-drawer"
+			>
 				<div className="log-detail-drawer__log">
 					<Divider type="vertical" className={cx('log-type-indicator', logType)} />
 					<Tooltip

frontend/src/components/QueryBuilderV2/QueryV2/QuerySearch/QuerySearch.tsx

@@ -49,7 +49,11 @@ import { unquote } from 'utils/stringUtils';
 import { getRecentQueries } from 'lib/recentQueries/getRecentQueries';
 import type { SignalType } from 'types/api/v5/queryRange';
 
-import { queryExamples, SUGGESTIONS_SECTION } from './constants';
+import {
+	queryExamples,
+	SUGGESTION_FETCH_DEBOUNCE_MS,
+	SUGGESTIONS_SECTION,
+} from './constants';
 import {
 	combineInitialAndUserExpression,
 	dedupeOptionsByLabel,
@@ -353,7 +357,7 @@ function QuerySearch({
 	);
 
 	const debouncedFetchKeySuggestions = useMemo(
-		() => debounce(fetchKeySuggestions, 300),
+		() => debounce(fetchKeySuggestions, SUGGESTION_FETCH_DEBOUNCE_MS),
 		[fetchKeySuggestions],
 	);
 
@@ -584,7 +588,7 @@ function QuerySearch({
 	);
 
 	const debouncedFetchValueSuggestions = useMemo(
-		() => debounce(fetchValueSuggestions, 300),
+		() => debounce(fetchValueSuggestions, SUGGESTION_FETCH_DEBOUNCE_MS),
 		[fetchValueSuggestions],
 	);
 

frontend/src/components/QueryBuilderV2/QueryV2/QuerySearch/constants.ts

@@ -1,6 +1,8 @@
 export const RECENTS_SECTION = { name: 'Recent searches', rank: 1 } as const;
 export const SUGGESTIONS_SECTION = { name: 'Suggestions', rank: 2 } as const;
 
+export const SUGGESTION_FETCH_DEBOUNCE_MS = 300;
+
 // TODO: move to using TelemetrytypesFieldContextDTO when we migrate getKeySuggestions API (Part of https://github.com/SigNoz/engineering-pod/issues/5289)
 export const FIELD_CONTEXTS = [
 	'attribute',

frontend/src/components/QueryBuilderV2/QueryV2/__tests__/QuerySearch.contextSuggestions.test.tsx

@@ -23,6 +23,13 @@ jest.mock('providers/Dashboard/store/useDashboardStore', () => ({
 	}),
 }));
 
+// Shrink the suggestion-fetch debounce (300ms in prod) so these integration
+// tests aren't paced by it; coalescing semantics stay intact.
+jest.mock('../QuerySearch/constants', () => ({
+	...jest.requireActual('../QuerySearch/constants'),
+	SUGGESTION_FETCH_DEBOUNCE_MS: 30,
+}));
+
 jest.mock('hooks/queryBuilder/useQueryBuilder', () => {
 	const handleRunQuery = jest.fn();
 	return {

frontend/src/components/TanStackTableView/TanStackCustomTableRow.tsx

@@ -88,6 +88,7 @@ function TanStackCustomTableRow<TData, TItemKey = string>({
 			{...props}
 			className={rowClassName}
 			style={rowStyle}
+			data-testid={context?.getRowTestId?.(rowData)}
 			onMouseEnter={handleMouseEnter}
 			onMouseLeave={clearHovered}
 		>
@@ -154,6 +155,12 @@ function areTableRowPropsEqual<TData, TItemKey = string>(
 			return false;
 		}
 
+		const prevTestId = prev.context?.getRowTestId?.(prevData) ?? '';
+		const nextTestId = next.context?.getRowTestId?.(nextData) ?? '';
+		if (prevTestId !== nextTestId) {
+			return false;
+		}
+
 		const prevStyle = prev.context?.getRowStyle?.(prevData);
 		const nextStyle = next.context?.getRowStyle?.(nextData);
 		if (prevStyle !== nextStyle) {

frontend/src/components/TanStackTableView/TanStackRow.tsx

@@ -33,7 +33,6 @@ function TanStackRowCellsInner<TData, TItemKey = string>({
 	// Stable references via destructuring, keep them as is
 	const onRowClick = context?.onRowClick;
 	const onRowClickNewTab = context?.onRowClickNewTab;
-	const onRowDeactivate = context?.onRowDeactivate;
 	const isRowActive = context?.isRowActive;
 	const getRowKeyData = context?.getRowKeyData;
 	const rowIndex = row.index;
@@ -52,21 +51,9 @@ function TanStackRowCellsInner<TData, TItemKey = string>({
 			}
 
 			const isActive = isRowActive?.(rowData) ?? false;
-			if (isActive && onRowDeactivate) {
-				onRowDeactivate();
-			} else {
-				onRowClick?.(rowData, itemKey);
-			}
+			onRowClick?.(rowData, itemKey, { isActive });
 		},
-		[
-			isRowActive,
-			onRowDeactivate,
-			onRowClick,
-			onRowClickNewTab,
-			rowData,
-			getRowKeyData,
-			rowIndex,
-		],
+		[isRowActive, onRowClick, onRowClickNewTab, rowData, getRowKeyData, rowIndex],
 	);
 
 	if (itemKind === 'expansion') {
@@ -120,7 +107,6 @@ function areRowCellsPropsEqual<TData>(
 		prev.columnVisibilityKey === next.columnVisibilityKey &&
 		prev.context?.onRowClick === next.context?.onRowClick &&
 		prev.context?.onRowClickNewTab === next.context?.onRowClickNewTab &&
-		prev.context?.onRowDeactivate === next.context?.onRowDeactivate &&
 		prev.context?.isRowActive === next.context?.isRowActive &&
 		prev.context?.getRowKeyData === next.context?.getRowKeyData &&
 		prev.context?.renderRowActions === next.context?.renderRowActions &&

frontend/src/components/TanStackTableView/TanStackTable.tsx

@@ -92,11 +92,11 @@ function TanStackTableInner<TData, TItemKey = string>(
 		getGroupKey,
 		getRowStyle,
 		getRowClassName,
+		getRowTestId,
 		isRowActive,
 		renderRowActions,
 		onRowClick,
 		onRowClickNewTab,
-		onRowDeactivate,
 		onSort,
 		activeRowIndex,
 		renderExpandedRow,
@@ -378,11 +378,11 @@ function TanStackTableInner<TData, TItemKey = string>(
 		() => ({
 			getRowStyle,
 			getRowClassName,
+			getRowTestId,
 			isRowActive,
 			renderRowActions,
 			onRowClick,
 			onRowClickNewTab,
-			onRowDeactivate,
 			renderExpandedRow,
 			getRowKeyData,
 			colCount: visibleColumnsCount,
@@ -396,11 +396,11 @@ function TanStackTableInner<TData, TItemKey = string>(
 		[
 			getRowStyle,
 			getRowClassName,
+			getRowTestId,
 			isRowActive,
 			renderRowActions,
 			onRowClick,
 			onRowClickNewTab,
-			onRowDeactivate,
 			renderExpandedRow,
 			getRowKeyData,
 			visibleColumnsCount,

frontend/src/components/TanStackTableView/__tests__/TanStackRow.test.tsx

@@ -85,7 +85,9 @@ describe('TanStackRowCells', () => {
 			</table>,
 		);
 		await user.click(screen.getAllByRole('cell')[0]);
-		expect(onRowClick).toHaveBeenCalledWith({ id: 'r1' }, 'r1');
+		expect(onRowClick).toHaveBeenCalledWith({ id: 'r1' }, 'r1', {
+			isActive: false,
+		});
 	});
 
 	it('fires onRowClick with empty itemKey when getRowKeyData is not provided', async () => {
@@ -117,17 +119,19 @@ describe('TanStackRowCells', () => {
 			</table>,
 		);
 		await user.click(screen.getAllByRole('cell')[0]);
-		expect(onRowClick).toHaveBeenCalledWith({ id: 'r1' }, '');
+		expect(onRowClick).toHaveBeenCalledWith({ id: 'r1' }, '', {
+			isActive: false,
+		});
 	});
 
-	it('calls onRowDeactivate instead of onRowClick when row is active', async () => {
+	it('calls onRowClick with isActive: true when the row is active', async () => {
+		// The table no longer owns open/close — it reports the active state and the
+		// consumer routes the click. An active row must still fire onRowClick.
 		const user = userEvent.setup();
 		const onRowClick = jest.fn();
-		const onRowDeactivate = jest.fn();
 		const ctx: TableRowContext<Row> = {
 			colCount: 1,
 			onRowClick,
-			onRowDeactivate,
 			isRowActive: () => true,
 			getRowKeyData: () => ({ finalKey: 'r1', itemKey: 'r1' }),
 			hasSingleColumn: false,
@@ -152,8 +156,44 @@ describe('TanStackRowCells', () => {
 			</table>,
 		);
 		await user.click(screen.getAllByRole('cell')[0]);
-		expect(onRowDeactivate).toHaveBeenCalled();
-		expect(onRowClick).not.toHaveBeenCalled();
+		expect(onRowClick).toHaveBeenCalledWith({ id: 'r1' }, 'r1', {
+			isActive: true,
+		});
+	});
+
+	it('calls onRowClick with isActive: false when the row is not active', async () => {
+		const user = userEvent.setup();
+		const onRowClick = jest.fn();
+		const ctx: TableRowContext<Row> = {
+			colCount: 1,
+			onRowClick,
+			isRowActive: () => false,
+			getRowKeyData: () => ({ finalKey: 'r1', itemKey: 'r1' }),
+			hasSingleColumn: false,
+			columnOrderKey: '',
+			columnVisibilityKey: '',
+		};
+		const row = buildMockRow([{ id: 'body' }]);
+		render(
+			<table>
+				<tbody>
+					<tr>
+						<TanStackRowCells<Row>
+							row={row as never}
+							context={ctx}
+							itemKind="row"
+							hasSingleColumn={false}
+							columnOrderKey=""
+							columnVisibilityKey=""
+						/>
+					</tr>
+				</tbody>
+			</table>,
+		);
+		await user.click(screen.getAllByRole('cell')[0]);
+		expect(onRowClick).toHaveBeenCalledWith({ id: 'r1' }, 'r1', {
+			isActive: false,
+		});
 	});
 
 	it('does not render renderRowActions before hover', () => {

frontend/src/components/TanStackTableView/__tests__/TanStackTableView.test.tsx

@@ -611,6 +611,7 @@ describe('TanStackTableView Integration', () => {
 			expect(onRowClick).toHaveBeenCalledWith(
 				expect.objectContaining({ id: '1', name: 'Item 1' }),
 				'1',
+				{ isActive: false },
 			);
 		});
 
@@ -639,6 +640,7 @@ describe('TanStackTableView Integration', () => {
 			expect(onRowClick).toHaveBeenCalledWith(
 				expect.objectContaining({ id: '1', name: 'Item 1' }),
 				{ id: '1', name: 'Item 1' },
+				{ isActive: false },
 			);
 		});
 
@@ -659,15 +661,15 @@ describe('TanStackTableView Integration', () => {
 			expect(row).toHaveClass('tableRowActive');
 		});
 
-		it('calls onRowDeactivate when clicking active row', async () => {
+		it('calls onRowClick with isActive: true when clicking the active row', async () => {
+			// The consumer owns open/close routing — the table just reports the
+			// active state via the click context.
 			const user = userEvent.setup();
 			const onRowClick = jest.fn();
-			const onRowDeactivate = jest.fn();
 
 			renderTanStackTable({
 				props: {
 					onRowClick,
-					onRowDeactivate,
 					isRowActive: (row) => row.id === '1',
 				},
 			});
@@ -678,8 +680,11 @@ describe('TanStackTableView Integration', () => {
 
 			await user.click(screen.getByText('Item 1'));
 
-			expect(onRowDeactivate).toHaveBeenCalled();
-			expect(onRowClick).not.toHaveBeenCalled();
+			expect(onRowClick).toHaveBeenCalledWith(
+				expect.objectContaining({ id: '1' }),
+				expect.anything(),
+				{ isActive: true },
+			);
 		});
 
 		it('opens in new tab on ctrl+click', async () => {

frontend/src/components/TanStackTableView/index.tsx

@@ -116,9 +116,11 @@ export * from './useTableParams';
  *   getItemKey={(row) => row.id}
  *   isRowActive={(row) => row.id === selectedId}
  *   activeRowIndex={selectedIndex}
- *   onRowClick={(row, itemKey) => setSelectedId(itemKey)}
+ *   // The table reports the click + the row's active state; the consumer owns open/close.
+ *   onRowClick={(row, itemKey, { isActive }) =>
+ *     setSelectedId(isActive ? undefined : itemKey)
+ *   }
  *   onRowClickNewTab={(row, itemKey) => openInNewTab(itemKey)}
- *   onRowDeactivate={() => setSelectedId(undefined)}
  *   getRowClassName={(row) => (row.severity === 'error' ? 'row-error' : '')}
  *   getRowStyle={(row) => (row.dimmed ? { opacity: 0.5 } : {})}
  *   renderRowActions={(row) => <Button size="small">Open</Button>}

frontend/src/components/TanStackTableView/types.ts

@@ -81,15 +81,19 @@ export type FlatItem<TData> =
 	| { kind: 'row'; row: TanStackRowType<TData> }
 	| { kind: 'expansion'; row: TanStackRowType<TData> };
 
+export type RowClickContext = {
+	isActive: boolean;
+};
+
 export type TableRowContext<TData, TItemKey = string> = {
 	getRowStyle?: (row: TData) => CSSProperties;
 	getRowClassName?: (row: TData) => string;
+	getRowTestId?: (row: TData) => string;
 	isRowActive?: (row: TData) => boolean;
 	renderRowActions?: (row: TData) => ReactNode;
-	onRowClick?: (row: TData, itemKey: TItemKey) => void;
+	onRowClick?: (row: TData, itemKey: TItemKey, context: RowClickContext) => void;
 	/** Called when ctrl+click or cmd+click on a row */
 	onRowClickNewTab?: (row: TData, itemKey: TItemKey) => void;
-	onRowDeactivate?: () => void;
 	renderExpandedRow?: (
 		row: TData,
 		rowKey: string,
@@ -178,12 +182,12 @@ export type TanStackTableProps<TData, TItemKey = string> = {
 	getGroupKey?: (row: TData) => Record<string, string>;
 	getRowStyle?: (row: TData) => CSSProperties;
 	getRowClassName?: (row: TData) => string;
+	getRowTestId?: (row: TData) => string;
 	isRowActive?: (row: TData) => boolean;
 	renderRowActions?: (row: TData) => ReactNode;
-	onRowClick?: (row: TData, itemKey: TItemKey) => void;
+	onRowClick?: (row: TData, itemKey: TItemKey, context: RowClickContext) => void;
 	/** Called when ctrl+click or cmd+click on a row */
 	onRowClickNewTab?: (row: TData, itemKey: TItemKey) => void;
-	onRowDeactivate?: () => void;
 	activeRowIndex?: number;
 	renderExpandedRow?: (
 		row: TData,

frontend/src/constants/query.ts

@@ -18,7 +18,6 @@ export enum QueryParams {
 	q = 'q',
 	activeLogId = 'activeLogId',
 	timeRange = 'timeRange',
-	compositeQuery = 'compositeQuery',
 	panelTypes = 'panelTypes',
 	pageSize = 'pageSize',
 	viewMode = 'viewMode',

frontend/src/container/AIAssistant/__tests__/getAutoContexts.test.ts

@@ -1,5 +1,7 @@
 import { QueryParams } from 'constants/query';
 import ROUTES from 'constants/routes';
+import { serialize } from 'lib/compositeQuery/serializer';
+import { Query } from 'types/api/queryBuilder/queryBuilderData';
 
 import { getAutoContexts } from '../getAutoContexts';
 
@@ -51,8 +53,8 @@ describe('getAutoContexts', () => {
 	it('includes the query in alert edit context', () => {
 		const ruleId = 'rule-edit';
 		const query = { queryType: 'builder', builder: { queryData: [] } };
-		const compositeQuery = encodeURIComponent(JSON.stringify(query));
-		const search = `?${QueryParams.ruleId}=${ruleId}&${QueryParams.compositeQuery}=${compositeQuery}`;
+		const serializedParams = serialize(query as unknown as Query);
+		const search = `?${QueryParams.ruleId}=${ruleId}&${serializedParams.toString()}`;
 
 		const contexts = getAutoContexts(ROUTES.EDIT_ALERTS, search);
 
@@ -72,8 +74,8 @@ describe('getAutoContexts', () => {
 
 	it('includes the query in alert new context (no ruleId)', () => {
 		const query = { queryType: 'builder', builder: { queryData: [] } };
-		const compositeQuery = encodeURIComponent(JSON.stringify(query));
-		const search = `?${QueryParams.compositeQuery}=${compositeQuery}`;
+		const serializedParams = serialize(query as unknown as Query);
+		const search = `?${serializedParams.toString()}`;
 
 		const contexts = getAutoContexts(ROUTES.ALERTS_NEW, search);
 
@@ -239,4 +241,24 @@ describe('getAutoContexts', () => {
 			),
 		).toStrictEqual([]);
 	});
+
+	it('decodes the serialized composite query into metadata.query', () => {
+		const query = { builder: { queryData: [] } } as unknown as Query;
+		const search = `?${serialize(query).toString()}`;
+
+		const [context] = getAutoContexts(ROUTES.LOGS_EXPLORER, search);
+
+		expect(context.metadata?.query).toStrictEqual(query);
+	});
+
+	it('omits metadata.query when no serialized query is in the URL', () => {
+		// Detection no longer gates on the `compositeQuery` key — it routes
+		// through `deserialize`/the adapter list — so non-query params (time
+		// range, etc.) must not be mistaken for a query.
+		const search = `?${QueryParams.startTime}=1700000000000&${QueryParams.endTime}=1700003600000`;
+
+		const [context] = getAutoContexts(ROUTES.LOGS_EXPLORER, search);
+
+		expect(context.metadata).not.toHaveProperty('query');
+	});
 });

frontend/src/container/AIAssistant/components/ActionsSection/ActionsSection.tsx

@@ -24,7 +24,7 @@ import {
 	undoExecution,
 } from 'api/ai-assistant/chat';
 import ROUTES from 'constants/routes';
-import { QueryParams } from 'constants/query';
+import { serialize } from 'lib/compositeQuery/serializer';
 import { openInNewTab } from 'utils/navigation';
 import {
 	ArchiveRestore,
@@ -363,8 +363,8 @@ function applyFilter(action: MessageActionDTO, deps: ApplyFilterDeps): void {
 	}
 	// eslint-disable-next-line no-console
 	console.log('[apply_filter] off-page → history.push', base);
-	const encoded = encodeURIComponent(JSON.stringify(normalized));
-	deps.history.push(`${base}?${QueryParams.compositeQuery}=${encoded}`);
+	const params = serialize(normalized);
+	deps.history.push(`${base}?${params.toString()}`);
 }
 
 /** Picks the right rollback API call for a given action kind. */

frontend/src/container/AIAssistant/components/ActionsSection/utils/__tests__/openSavedView.test.ts

@@ -8,6 +8,7 @@ import { getViewById } from 'api/saveView/getViewById';
 import ROUTES from 'constants/routes';
 import { QueryParams } from 'constants/query';
 import { PANEL_TYPES } from 'constants/queryBuilder';
+import { deserialize } from 'lib/compositeQuery/serializer';
 import { ICompositeMetricQuery } from 'types/api/alerts/compositeQuery';
 import { AllViewsProps, ViewProps } from 'types/api/saveViews/types';
 import { DataSource } from 'types/common/queryBuilder';
@@ -218,7 +219,9 @@ describe('buildExplorerNavigationUrl', () => {
 		);
 
 		expect(url).toContain(ROUTES.LOGS_EXPLORER);
-		expect(url).toContain(`${QueryParams.compositeQuery}=`);
+
+		const params = new URLSearchParams(new URL(url, 'http://x').search);
+		expect(deserialize(params)).not.toBeNull();
 		expect(url).toContain(`${QueryParams.viewKey}=`);
 	});
 });

frontend/src/container/AIAssistant/components/ActionsSection/utils/openSavedView.ts

@@ -2,6 +2,10 @@ import { getAllViews } from 'api/saveView/getAllViews';
 import { getViewById } from 'api/saveView/getViewById';
 import { QueryParams } from 'constants/query';
 import { PANEL_TYPES } from 'constants/queryBuilder';
+import {
+	applySerializedParams,
+	serialize,
+} from 'lib/compositeQuery/serializer';
 import { mapQueryDataFromApi } from 'lib/newQueryBuilder/queryBuilderMappers/mapQueryDataFromApi';
 import { SOURCEPAGE_VS_ROUTES } from 'pages/SaveView/constants';
 import { ViewProps } from 'types/api/saveViews/types';
@@ -75,10 +79,7 @@ export function buildExplorerNavigationUrl(
 	searchParams: Record<string, unknown>,
 ): string {
 	const params = new URLSearchParams();
-	params.set(
-		QueryParams.compositeQuery,
-		encodeURIComponent(JSON.stringify(query)),
-	);
+	applySerializedParams(serialize(query), params);
 	Object.entries(searchParams).forEach(([key, value]) => {
 		params.set(key, JSON.stringify(value));
 	});

frontend/src/container/AIAssistant/getAutoContexts.ts

@@ -1,6 +1,7 @@
 import type { MessageContext } from 'api/ai-assistant/chat';
 import { QueryParams } from 'constants/query';
 import ROUTES from 'constants/routes';
+import { deserialize } from 'lib/compositeQuery/serializer';
 import { AlertListTabs } from 'pages/AlertList/types';
 import { NEW_PANEL_ID } from 'pages/DashboardPageV2/DashboardContainer/PanelEditor/newPanelRoute';
 import { matchPath } from 'react-router-dom';
@@ -345,15 +346,9 @@ function collectSharedMetadata(
 		out.timeRange = { start: startTime, end: endTime };
 	}
 
-	// Query Builder state — URL-encoded JSON written by `QueryBuilderProvider`.
-	const compositeQueryRaw = params.get(QueryParams.compositeQuery);
-	if (compositeQueryRaw) {
-		try {
-			out.query = JSON.parse(decodeURIComponent(compositeQueryRaw));
-		} catch {
-			// Malformed JSON in the URL — drop silently rather than throw
-			// inside a context-collection helper.
-		}
+	const decodedQuery = deserialize(params);
+	if (decodedQuery) {
+		out.query = decodedQuery;
 	}
 
 	// Saved view selectors (logs / traces explorer) and dashboard variables.

frontend/src/container/AllError/index.tsx

@@ -27,6 +27,7 @@ import {
 } from 'hooks/useResourceAttribute/utils';
 import { TimestampInput } from 'hooks/useTimezoneFormatter/useTimezoneFormatter';
 import useUrlQuery from 'hooks/useUrlQuery';
+import { deserialize, serializeToParams } from 'lib/compositeQuery/serializer';
 import createQueryParams from 'lib/createQueryParams';
 import history from 'lib/history';
 import { isUndefined } from 'lodash-es';
@@ -61,7 +62,6 @@ type QueryParams = {
 	pageSize: number;
 	exceptionType?: string;
 	serviceName?: string;
-	compositeQuery?: string;
 };
 
 function AllErrors(): JSX.Element {
@@ -78,7 +78,6 @@ function AllErrors(): JSX.Element {
 		getUpdatedPageSize,
 		getUpdatedExceptionType,
 		getUpdatedServiceName,
-		getUpdatedCompositeQuery,
 	} = useMemo(
 		() => ({
 			updatedOrder: getOrder(params.get(urlKey.order)),
@@ -87,7 +86,6 @@ function AllErrors(): JSX.Element {
 			getUpdatedPageSize: getUpdatePageSize(params.get(urlKey.pageSize)),
 			getUpdatedExceptionType: getFilterString(params.get(urlKey.exceptionType)),
 			getUpdatedServiceName: getFilterString(params.get(urlKey.serviceName)),
-			getUpdatedCompositeQuery: getFilterString(params.get(urlKey.compositeQuery)),
 		}),
 		[params],
 	);
@@ -213,7 +211,6 @@ function AllErrors(): JSX.Element {
 					offset: getUpdatedOffset,
 					orderParam: getUpdatedParams,
 					pageSize: getUpdatedPageSize,
-					compositeQuery: getUpdatedCompositeQuery,
 				};
 
 				if (exceptionFilterValue && exceptionFilterValue !== 'undefined') {
@@ -224,7 +221,13 @@ function AllErrors(): JSX.Element {
 					queryParams.serviceName = serviceFilterValue;
 				}
 
-				history.replace(`${pathname}?${createQueryParams(queryParams)}`);
+				// Carry the active query across the filter change so the trace context survives.
+				history.replace(
+					`${pathname}?${createQueryParams({
+						...queryParams,
+						...(compositeData ? serializeToParams(compositeData) : {}),
+					})}`,
+				);
 				confirm();
 			},
 		[
@@ -233,7 +236,7 @@ function AllErrors(): JSX.Element {
 			getUpdatedPageSize,
 			getUpdatedParams,
 			getUpdatedServiceName,
-			getUpdatedCompositeQuery,
+			compositeData,
 			pathname,
 			updatedOrder,
 		],
@@ -438,7 +441,9 @@ function AllErrors(): JSX.Element {
 					serviceName: getFilterString(params.get(urlKey.serviceName)),
 					exceptionType: getFilterString(params.get(urlKey.exceptionType)),
 				});
-				const compositeQuery = params.get(urlKey.compositeQuery) || '';
+				// Re-serialize from the live URL rather than forwarding the raw param, so
+				// every key the adapter owns is carried over.
+				const compositeQuery = deserialize(params);
 				history.replace(
 					`${pathname}?${createQueryParams({
 						order: updatedOrder,
@@ -447,7 +452,7 @@ function AllErrors(): JSX.Element {
 						pageSize,
 						exceptionType,
 						serviceName,
-						compositeQuery,
+						...(compositeQuery ? serializeToParams(compositeQuery) : {}),
 					})}`,
 				);
 			}

frontend/src/container/AllError/tests/constants.ts

@@ -46,32 +46,11 @@ export const MOCK_USE_QUERIES_DATA = [
 	},
 ];
 
+// Deliberately double-encoded: this is the legacy shape older bookmarks/shared
+// links still carry, so it also covers the serializer's legacy decode fallback.
 export const INIT_URL_WITH_COMMON_QUERY =
 	'/exceptions?compositeQuery=%257B%2522queryType%2522%253A%2522builder%2522%252C%2522builder%2522%253A%257B%2522queryData%2522%253A%255B%257B%2522dataSource%2522%253A%2522traces%2522%252C%2522queryName%2522%253A%2522A%2522%252C%2522aggregateOperator%2522%253A%2522noop%2522%252C%2522aggregateAttribute%2522%253A%257B%2522id%2522%253A%2522----resource--false%2522%252C%2522dataType%2522%253A%2522%2522%252C%2522key%2522%253A%2522%2522%252C%2522isColumn%2522%253Afalse%252C%2522type%2522%253A%2522resource%2522%252C%2522isJSON%2522%253Afalse%257D%252C%2522timeAggregation%2522%253A%2522rate%2522%252C%2522spaceAggregation%2522%253A%2522sum%2522%252C%2522functions%2522%253A%255B%255D%252C%2522filters%2522%253A%257B%2522items%2522%253A%255B%257B%2522id%2522%253A%2522db118ac7-9313-4adb-963f-f31b5b32c496%2522%252C%2522op%2522%253A%2522in%2522%252C%2522key%2522%253A%257B%2522key%2522%253A%2522deployment.environment%2522%252C%2522dataType%2522%253A%2522string%2522%252C%2522type%2522%253A%2522resource%2522%252C%2522isColumn%2522%253Afalse%252C%2522isJSON%2522%253Afalse%257D%252C%2522value%2522%253A%2522mq-kafka%2522%257D%255D%252C%2522op%2522%253A%2522AND%2522%257D%252C%2522expression%2522%253A%2522A%2522%252C%2522disabled%2522%253Afalse%252C%2522stepInterval%2522%253A60%252C%2522having%2522%253A%255B%255D%252C%2522limit%2522%253Anull%252C%2522orderBy%2522%253A%255B%255D%252C%2522groupBy%2522%253A%255B%255D%252C%2522legend%2522%253A%2522%2522%252C%2522reduceTo%2522%253A%2522avg%2522%257D%255D%252C%2522queryFormulas%2522%253A%255B%255D%257D%252C%2522promql%2522%253A%255B%257B%2522name%2522%253A%2522A%2522%252C%2522query%2522%253A%2522%2522%252C%2522legend%2522%253A%2522%2522%252C%2522disabled%2522%253Afalse%257D%255D%252C%2522clickhouse_sql%2522%253A%255B%257B%2522name%2522%253A%2522A%2522%252C%2522legend%2522%253A%2522%2522%252C%2522disabled%2522%253Afalse%252C%2522query%2522%253A%2522%2522%257D%255D%252C%2522id%2522%253A%2522dd576d04-0822-476d-b0c2-807a7af2e5e7%2522%257D';
 
-export const extractCompositeQueryObject = (
-	url: string,
-): Record<string, unknown> | null => {
-	try {
-		const urlObj = new URL(`http://dummy-base${url}`); // Add dummy base to parse relative URL
-		const encodedParam = urlObj.searchParams.get('compositeQuery');
-
-		if (!encodedParam) {
-			return null;
-		}
-
-		// Decode twice
-		const firstDecode = decodeURIComponent(encodedParam);
-		const secondDecode = decodeURIComponent(firstDecode);
-
-		// Parse JSON
-		return JSON.parse(secondDecode);
-	} catch (err) {
-		console.error('Failed to extract compositeQuery:', err);
-		return null;
-	}
-};
-
 export const TAG_FROM_QUERY = [
 	{
 		BoolValues: [],

frontend/src/container/AllError/utils.ts

@@ -11,6 +11,8 @@ import {
 export const isOrder = (order: string | null): order is Order =>
 	!!(order === 'ascending' || order === 'descending');
 
+// The serialized query is deliberately absent: its param keys are owned by the
+// compositeQuery serializer (see lib/compositeQuery), not spelled out here.
 export const urlKey = {
 	order: 'order',
 	offset: 'offset',
@@ -18,7 +20,6 @@ export const urlKey = {
 	pageSize: 'pageSize',
 	exceptionType: 'exceptionType',
 	serviceName: 'serviceName',
-	compositeQuery: 'compositeQuery',
 };
 
 export const isOrderParams = (orderBy: string | null): orderBy is OrderBy =>

frontend/src/container/DashboardContainer/PanelTypeSelectionModal/index.tsx

@@ -2,8 +2,8 @@ import { memo } from 'react';
 import { Card, Modal } from 'antd';
 import { Typography } from '@signozhq/ui/typography';
 import logEvent from 'api/common/logEvent';
-import { QueryParams } from 'constants/query';
 import { PANEL_TYPES, PANEL_TYPES_INITIAL_QUERY } from 'constants/queryBuilder';
+import { serializeToParams } from 'lib/compositeQuery/serializer';
 import createQueryParams from 'lib/createQueryParams';
 import history from 'lib/history';
 import { usePanelTypeSelectionModalStore } from 'providers/Dashboard/helpers/panelTypeSelectionModalHelper';
@@ -28,9 +28,7 @@ function PanelTypeSelectionModal(): JSX.Element {
 		const queryParams = {
 			graphType: name,
 			widgetId: id,
-			[QueryParams.compositeQuery]: JSON.stringify(
-				PANEL_TYPES_INITIAL_QUERY[name],
-			),
+			...serializeToParams(PANEL_TYPES_INITIAL_QUERY[name]),
 		};
 
 		history.push(

frontend/src/container/ExplorerOptions/ExplorerOptions.tsx

@@ -63,6 +63,8 @@ import { useIsDarkMode } from 'hooks/useDarkMode';
 import useErrorNotification from 'hooks/useErrorNotification';
 import { useHandleExplorerTabChange } from 'hooks/useHandleExplorerTabChange';
 import { useNotifications } from 'hooks/useNotifications';
+import { serializeToParams } from 'lib/compositeQuery/serializer';
+import createQueryParams from 'lib/createQueryParams';
 import { mapCompositeQueryFromQuery } from 'lib/newQueryBuilder/queryBuilderMappers/mapCompositeQueryFromQuery';
 import { cloneDeep, isEqual, omit } from 'lodash-es';
 import { useAppContext } from 'providers/App/App';
@@ -174,7 +176,7 @@ function ExplorerOptions({
 
 	const handleConditionalQueryModification = useCallback(
 		// eslint-disable-next-line sonarjs/cognitive-complexity
-		(defaultQuery: Query | null): string => {
+		(defaultQuery: Query | null): Record<string, string> => {
 			const queryToUse = defaultQuery || query;
 			if (!queryToUse) {
 				throw new Error('No query provided');
@@ -184,7 +186,7 @@ function ExplorerOptions({
 					StringOperators.NOOP &&
 				sourcepage !== DataSource.LOGS
 			) {
-				return JSON.stringify(queryToUse);
+				return serializeToParams(queryToUse);
 			}
 
 			// Convert NOOP to COUNT for alerts and strip orderBy for logs
@@ -208,14 +210,7 @@ function ExplorerOptions({
 				);
 			}
 
-			try {
-				return JSON.stringify(modifiedQuery);
-			} catch (err) {
-				throw new Error(
-					'Failed to stringify modified query: ' +
-						(err instanceof Error ? err.message : String(err)),
-				);
-			}
+			return serializeToParams(modifiedQuery);
 		},
 		[panelType, query, sourcepage],
 	);
@@ -238,13 +233,9 @@ function ExplorerOptions({
 				});
 			}
 
-			const stringifiedQuery = handleConditionalQueryModification(defaultQuery);
+			const serializedParams = handleConditionalQueryModification(defaultQuery);
 
-			history.push(
-				`${ROUTES.ALERTS_NEW}?${QueryParams.compositeQuery}=${encodeURIComponent(
-					stringifiedQuery,
-				)}`,
-			);
+			history.push(`${ROUTES.ALERTS_NEW}?${createQueryParams(serializedParams)}`);
 		},
 		// eslint-disable-next-line react-hooks/exhaustive-deps
 		[handleConditionalQueryModification, history],

frontend/src/container/ExplorerOptions/__tests__/ExplorerOptionWrapper.test.tsx

@@ -3,6 +3,7 @@ import { PANEL_TYPES } from 'constants/queryBuilder';
 import { MOCK_QUERY } from 'container/QueryTable/Drilldown/__tests__/mockTableData';
 import { ExportDashboard } from 'hooks/dashboard/useExportDashboards';
 import { useUpdateDashboard } from 'hooks/dashboard/useUpdateDashboard';
+import { serialize } from 'lib/compositeQuery/serializer';
 import { rest, server } from 'mocks-server/server';
 import {
 	defaultFeatureFlags,
@@ -380,9 +381,9 @@ describe('ExplorerOptionWrapper', () => {
 			await waitFor(() => {
 				expect(mockSafeNavigate).toHaveBeenCalledTimes(1);
 				expect(mockSafeNavigate).toHaveBeenCalledWith(
-					`/dashboard/${TEST_DASHBOARD_ID}/new?graphType=${panelTypeParam}&widgetId=${widgetId}&compositeQuery=${encodeURIComponent(
-						JSON.stringify(query),
-					)}`,
+					`/dashboard/${TEST_DASHBOARD_ID}/new?graphType=${panelTypeParam}&widgetId=${widgetId}&${serialize(
+						query,
+					).toString()}`,
 				);
 			});
 

frontend/src/container/FormAlertRules/index.tsx

@@ -34,6 +34,7 @@ import useGetYAxisUnit from 'hooks/useGetYAxisUnit';
 import { useNotifications } from 'hooks/useNotifications';
 import { useSafeNavigate } from 'hooks/useSafeNavigate';
 import useUrlQuery from 'hooks/useUrlQuery';
+import { clearSerializedParams } from 'lib/compositeQuery/serializer';
 import { mapQueryDataFromApi } from 'lib/newQueryBuilder/queryBuilderMappers/mapQueryDataFromApi';
 import { mapQueryDataToApi } from 'lib/newQueryBuilder/queryBuilderMappers/mapQueryDataToApi';
 import { isEmpty, isEqual } from 'lodash-es';
@@ -384,7 +385,7 @@ function FormAlertRules({
 
 	const onCancelHandler = useCallback(
 		(e?: React.MouseEvent) => {
-			urlQuery.delete(QueryParams.compositeQuery);
+			clearSerializedParams(urlQuery);
 			urlQuery.delete(QueryParams.panelTypes);
 			urlQuery.delete(QueryParams.ruleId);
 			urlQuery.delete(QueryParams.relativeTime);
@@ -610,7 +611,7 @@ function FormAlertRules({
 				`${ruleId}`,
 			]);
 
-			urlQuery.delete(QueryParams.compositeQuery);
+			clearSerializedParams(urlQuery);
 			urlQuery.delete(QueryParams.panelTypes);
 			urlQuery.delete(QueryParams.ruleId);
 			urlQuery.delete(QueryParams.relativeTime);

frontend/src/container/GridCardLayout/GridCard/WidgetGraphComponent.tsx

@@ -23,6 +23,10 @@ import { useUpdateDashboard } from 'hooks/dashboard/useUpdateDashboard';
 import { useNotifications } from 'hooks/useNotifications';
 import { useSafeNavigate } from 'hooks/useSafeNavigate';
 import useUrlQuery from 'hooks/useUrlQuery';
+import {
+	clearSerializedParams,
+	serializeToParams,
+} from 'lib/compositeQuery/serializer';
 import createQueryParams from 'lib/createQueryParams';
 import { RowData } from 'lib/query/createTableColumnsFromQuery';
 import {
@@ -213,9 +217,7 @@ function WidgetGraphComponent({
 						[QueryParams.graphType]: clonedWidget?.panelTypes,
 						[QueryParams.widgetId]: uuid,
 						...(clonedWidget?.query && {
-							[QueryParams.compositeQuery]: encodeURIComponent(
-								JSON.stringify(clonedWidget.query),
-							),
+							...serializeToParams(clonedWidget.query),
 						}),
 					};
 					safeNavigate(`${pathname}/new?${createQueryParams(queryParams)}`);
@@ -256,7 +258,7 @@ function WidgetGraphComponent({
 	const onToggleModelHandler = (): void => {
 		const existingSearchParams = new URLSearchParams(search);
 		existingSearchParams.delete(QueryParams.expandedWidgetId);
-		existingSearchParams.delete(QueryParams.compositeQuery);
+		clearSerializedParams(existingSearchParams);
 		existingSearchParams.delete(QueryParams.graphType);
 		const updatedQueryParams = Object.fromEntries(existingSearchParams.entries());
 		if (queryResponse.data?.payload) {

frontend/src/container/GridCardLayout/WidgetHeader/index.tsx

@@ -29,6 +29,10 @@ import useCreateAlerts from 'hooks/queryBuilder/useCreateAlerts';
 import useComponentPermission from 'hooks/useComponentPermission';
 import { useSafeNavigate } from 'hooks/useSafeNavigate';
 import useUrlQuery from 'hooks/useUrlQuery';
+import {
+	applySerializedParams,
+	serialize,
+} from 'lib/compositeQuery/serializer';
 import { RowData } from 'lib/query/createTableColumnsFromQuery';
 import { isEmpty } from 'lodash-es';
 import { unparse } from 'papaparse';
@@ -86,10 +90,7 @@ function WidgetHeader({
 		const widgetId = widget.id;
 		urlQuery.set(QueryParams.widgetId, widgetId);
 		urlQuery.set(QueryParams.graphType, widget.panelTypes);
-		urlQuery.set(
-			QueryParams.compositeQuery,
-			encodeURIComponent(JSON.stringify(widget.query)),
-		);
+		applySerializedParams(serialize(widget.query), urlQuery);
 		const generatedUrl = buildAbsolutePath({
 			relativePath: 'new',
 			urlQueryString: urlQuery.toString(),

frontend/src/container/Home/AlertRules/AlertRules.tsx

@@ -7,6 +7,10 @@ import { useListRules } from 'api/generated/services/rules';
 import type { RuletypesRuleDTO } from 'api/generated/services/sigNoz.schemas';
 import { QueryParams } from 'constants/query';
 import ROUTES from 'constants/routes';
+import {
+	applySerializedParams,
+	serialize,
+} from 'lib/compositeQuery/serializer';
 import history from 'lib/history';
 import { mapQueryDataFromApi } from 'lib/newQueryBuilder/queryBuilderMappers/mapQueryDataFromApi';
 import { ArrowRight, ArrowUpRight, Plus } from '@signozhq/icons';
@@ -134,10 +138,7 @@ export default function AlertRules({
 		const compositeQuery = mapQueryDataFromApi(
 			toCompositeMetricQuery(record.condition.compositeQuery),
 		);
-		params.set(
-			QueryParams.compositeQuery,
-			encodeURIComponent(JSON.stringify(compositeQuery)),
-		);
+		applySerializedParams(serialize(compositeQuery), params);
 
 		const panelType = record.condition.compositeQuery.panelType;
 		if (panelType) {

frontend/src/container/InfraMonitoringK8s/Base/K8sBaseDetails.tsx

@@ -28,6 +28,10 @@ import {
 	Time,
 } from 'container/TopNav/DateTimeSelectionV2/types';
 import { useIsDarkMode } from 'hooks/useDarkMode';
+import {
+	applySerializedParams,
+	serialize,
+} from 'lib/compositeQuery/serializer';
 import { GetQueryResultsProps } from 'lib/dashboard/getQueryResults';
 import GetMinMax from 'lib/getMinMax';
 import {
@@ -403,7 +407,7 @@ export default function K8sBaseDetails<T>({
 				},
 			};
 
-			urlQuery.set('compositeQuery', JSON.stringify(compositeQuery));
+			applySerializedParams(serialize(compositeQuery as any), urlQuery);
 
 			openInNewTab(`${ROUTES.LOGS_EXPLORER}?${urlQuery.toString()}`);
 		} else if (selectedView === VIEW_TYPES.TRACES) {
@@ -428,7 +432,7 @@ export default function K8sBaseDetails<T>({
 				},
 			};
 
-			urlQuery.set('compositeQuery', JSON.stringify(compositeQuery));
+			applySerializedParams(serialize(compositeQuery as any), urlQuery);
 
 			openInNewTab(`${ROUTES.TRACES_EXPLORER}?${urlQuery.toString()}`);
 		}

frontend/src/container/InfraMonitoringK8sV2/Base/K8sBaseDetailsContent.tsx

@@ -18,7 +18,12 @@ import {
 	initialQueryState,
 } from 'constants/queryBuilder';
 import ROUTES from 'constants/routes';
+import {
+	applySerializedParams,
+	serialize,
+} from 'lib/compositeQuery/serializer';
 import { parseAsString, useQueryState } from 'nuqs';
+import { EQueryType } from 'types/common/dashboard';
 import {
 	LogsAggregatorOperator,
 	TracesAggregatorOperator,
@@ -162,7 +167,7 @@ export default function K8sBaseDetailsContent<T>({
 
 			const compositeQuery = {
 				...initialQueryState,
-				queryType: 'builder',
+				queryType: EQueryType.QUERY_BUILDER,
 				builder: {
 					...initialQueryState.builder,
 					queryData: [
@@ -176,7 +181,7 @@ export default function K8sBaseDetailsContent<T>({
 				},
 			};
 
-			urlQuery.set('compositeQuery', JSON.stringify(compositeQuery));
+			applySerializedParams(serialize(compositeQuery), urlQuery);
 
 			openInNewTab(`${ROUTES.LOGS_EXPLORER}?${urlQuery.toString()}`);
 		} else if (selectedView === VIEW_TYPES.TRACES) {
@@ -187,7 +192,7 @@ export default function K8sBaseDetailsContent<T>({
 
 			const compositeQuery = {
 				...initialQueryState,
-				queryType: 'builder',
+				queryType: EQueryType.QUERY_BUILDER,
 				builder: {
 					...initialQueryState.builder,
 					queryData: [
@@ -201,7 +206,7 @@ export default function K8sBaseDetailsContent<T>({
 				},
 			};
 
-			urlQuery.set('compositeQuery', JSON.stringify(compositeQuery));
+			applySerializedParams(serialize(compositeQuery), urlQuery);
 
 			openInNewTab(`${ROUTES.TRACES_EXPLORER}?${urlQuery.toString()}`);
 		}

frontend/src/container/InfraMonitoringK8sV2/Base/K8sExpandedRow.tsx

@@ -10,9 +10,12 @@ import TanStackTable, {
 	TableColumnDef,
 	TanStackTableStateProvider,
 } from 'components/TanStackTableView';
-import { QueryParams } from 'constants/query';
 import { CornerDownRight } from '@signozhq/icons';
 import { useQueryBuilder } from 'hooks/queryBuilder/useQueryBuilder';
+import {
+	applySerializedParams,
+	serialize,
+} from 'lib/compositeQuery/serializer';
 import { useSafeNavigate } from 'hooks/useSafeNavigate';
 import useUrlQuery from 'hooks/useUrlQuery';
 import { v4 as uuid } from 'uuid';
@@ -214,10 +217,7 @@ export function K8sExpandedRow<T, TItemKey = string>({
 		};
 
 		const newUrlQuery = new URLSearchParams(urlQuery.toString());
-		newUrlQuery.set(
-			QueryParams.compositeQuery,
-			encodeURIComponent(JSON.stringify(updatedQuery)),
-		);
+		applySerializedParams(serialize(updatedQuery), newUrlQuery);
 
 		safeNavigate(`${location.pathname}?${newUrlQuery.toString()}`);
 	};

frontend/src/container/InfraMonitoringK8sV2/Base/K8sHeader.tsx

@@ -11,11 +11,14 @@ import {
 import { TableColumnDef } from 'components/TanStackTableView';
 import QuerySearch from 'components/QueryBuilderV2/QueryV2/QuerySearch/QuerySearch';
 import { InfraMonitoringEvents } from 'constants/events';
-import { QueryParams } from 'constants/query';
 import RunQueryBtn from 'container/QueryBuilder/components/RunQueryBtn/RunQueryBtn';
 import DateTimeSelectionV2 from 'container/TopNav/DateTimeSelectionV2';
 import { useQueryBuilder } from 'hooks/queryBuilder/useQueryBuilder';
 import { IBuilderQuery } from 'types/api/queryBuilder/queryBuilderData';
+import {
+	applySerializedParams,
+	serialize,
+} from 'lib/compositeQuery/serializer';
 import { useSafeNavigate } from 'hooks/useSafeNavigate';
 import { SlidersHorizontal } from '@signozhq/icons';
 import { v4 as uuid } from 'uuid';
@@ -107,10 +110,7 @@ function K8sHeader<TData>({
 
 			// Use window.location.search to get fresh URL params (avoids stale hook state)
 			const newUrlQuery = new URLSearchParams(window.location.search);
-			newUrlQuery.set(
-				QueryParams.compositeQuery,
-				encodeURIComponent(JSON.stringify(updatedQuery)),
-			);
+			applySerializedParams(serialize(updatedQuery), newUrlQuery);
 
 			safeNavigate(`${location.pathname}?${newUrlQuery.toString()}`);
 			void invalidateQueries();

frontend/src/container/InfraMonitoringK8sV2/Base/components/EntityCountsSection/EntityCountsSection.tsx

@@ -5,6 +5,10 @@ import { Compass } from '@signozhq/icons';
 import { QueryParams } from 'constants/query';
 import { initialQueriesMap } from 'constants/queryBuilder';
 import ROUTES from 'constants/routes';
+import {
+	applySerializedParams,
+	serialize,
+} from 'lib/compositeQuery/serializer';
 import { Link } from 'react-router-dom';
 import { DataSource } from 'types/common/queryBuilder';
 import { v4 as uuid } from 'uuid';
@@ -54,10 +58,7 @@ export function EntityCountsSection<T>({
 
 		const urlParams = new URLSearchParams();
 		urlParams.set(INFRA_MONITORING_K8S_PARAMS_KEYS.CATEGORY, targetCategory);
-		urlParams.set(
-			QueryParams.compositeQuery,
-			encodeURIComponent(JSON.stringify(compositeQuery)),
-		);
+		applySerializedParams(serialize(compositeQuery), urlParams);
 
 		const currentSearchParams = new URLSearchParams(window.location.search);
 		const detailRelativeTime = currentSearchParams.get(

frontend/src/container/IngestionSettings/MultiIngestionSettings.tsx

@@ -55,6 +55,7 @@ import { convertToApiError } from 'api/ErrorResponseHandlerForGeneratedAPIs';
 import { useGetGlobalConfig } from 'api/generated/services/global';
 import useDebouncedFn from 'hooks/useDebouncedFunction';
 import { useNotifications } from 'hooks/useNotifications';
+import { serialize } from 'lib/compositeQuery/serializer';
 import { cloneDeep, isNil, isUndefined } from 'lodash-es';
 import {
 	ArrowUpRight,
@@ -79,6 +80,7 @@ import {
 	UpdateLimitProps,
 } from 'types/api/ingestionKeys/limits/types';
 import { PaginationProps } from 'types/api/ingestionKeys/types';
+import { Query } from 'types/api/queryBuilder/queryBuilderData';
 import { MeterAggregateOperator } from 'types/common/queryBuilder';
 import { USER_ROLES } from 'types/roles';
 import { getDaysUntilExpiry } from 'utils/timeUtils';
@@ -898,8 +900,6 @@ function MultiIngestionSettings(): JSX.Element {
 			},
 		};
 
-		const stringifiedQuery = JSON.stringify(query);
-
 		const thresholds = cloneDeep(INITIAL_ALERT_THRESHOLD_STATE.thresholds);
 		thresholds[0].thresholdValue = thresholdValue;
 		thresholds[0].unit = thresholdUnit;
@@ -909,20 +909,18 @@ function MultiIngestionSettings(): JSX.Element {
 			? `[ingestion][${signal.signal}] ${keyName} has exceeded daily ingestion limit`
 			: `[ingestion][${signal.signal}] ${signal.signal} has exceeded daily ingestion limit`;
 
+		const params = serialize(query as Query);
+		params.set(QueryParams.thresholds, JSON.stringify(thresholds));
+		params.set(QueryParams.ruleName, ruleName);
+		params.set(QueryParams.yAxisUnit, yAxisUnit);
 		// Declare the metering prefill explicitly: "in total" + the meter window.
-		const URL = `${ROUTES.ALERTS_NEW}?${
-			QueryParams.compositeQuery
-		}=${encodeURIComponent(stringifiedQuery)}&${
-			QueryParams.thresholds
-		}=${encodeURIComponent(JSON.stringify(thresholds))}&${
-			QueryParams.ruleName
-		}=${encodeURIComponent(ruleName)}&${
-			QueryParams.yAxisUnit
-		}=${encodeURIComponent(yAxisUnit)}&${QueryParams.matchType}=${
-			AlertThresholdMatchType.IN_TOTAL
-		}&${QueryParams.evaluationWindowPreset}=${EvaluationWindowPreset.METER}`;
+		params.set(QueryParams.matchType, AlertThresholdMatchType.IN_TOTAL);
+		params.set(
+			QueryParams.evaluationWindowPreset,
+			EvaluationWindowPreset.METER,
+		);
 
-		history.push(URL);
+		history.push(`${ROUTES.ALERTS_NEW}?${params.toString()}`);
 	};
 
 	const columns: AntDTableProps<GatewaytypesIngestionKeyDTO>['columns'] = [

frontend/src/container/IngestionSettings/__tests__/MultiIngestionSettings.test.tsx

@@ -1,5 +1,6 @@
 import { GatewaytypesGettableIngestionKeysDTO } from 'api/generated/services/sigNoz.schemas';
 import { QueryParams } from 'constants/query';
+import { deserialize } from 'lib/compositeQuery/serializer';
 import { rest, server } from 'mocks-server/server';
 import {
 	fireEvent,
@@ -132,17 +133,19 @@ describe('MultiIngestionSettings Page', () => {
 		expect(thresholds[0].thresholdValue).toBe(1000);
 		expect(thresholds[0].unit).toBe('{count}');
 
-		const compositeQuery = JSON.parse(
-			urlParams.get(QueryParams.compositeQuery) || '{}',
-		);
-		expect(compositeQuery.unit).toBe('{count}');
-		expect(compositeQuery.builder.queryData).toBeDefined();
+		const compositeQuery = deserialize(urlParams);
+		expect(compositeQuery).not.toBeNull();
+		expect(compositeQuery?.unit).toBe('{count}');
+		expect(compositeQuery?.builder.queryData).toBeDefined();
 
-		const firstQueryData = compositeQuery.builder.queryData[0];
-		expect(firstQueryData.filter.expression).toContain(
+		const firstQueryData = compositeQuery?.builder.queryData[0];
+		expect(firstQueryData?.filter?.expression).toContain(
 			"signoz.workspace.key.id='k1'",
 		);
-		expect(firstQueryData.aggregations[0].metricName).toBe(
+		const firstAggregation = firstQueryData?.aggregations?.[0] as {
+			metricName: string;
+		};
+		expect(firstAggregation.metricName).toBe(
 			'signoz.meter.metric.datapoint.count',
 		);
 
@@ -213,18 +216,18 @@ describe('MultiIngestionSettings Page', () => {
 		expect(thresholds[0].thresholdValue).toBe(400);
 		expect(thresholds[0].unit).toBe('GiBy');
 
-		const compositeQuery = JSON.parse(
-			urlParams.get(QueryParams.compositeQuery) || '{}',
-		);
-		expect(compositeQuery.unit).toBe('bytes');
+		const compositeQuery = deserialize(urlParams);
+		expect(compositeQuery).not.toBeNull();
+		expect(compositeQuery?.unit).toBe('bytes');
 
-		const firstQueryData = compositeQuery.builder.queryData[0];
-		expect(firstQueryData.filter.expression).toContain(
+		const firstQueryData = compositeQuery?.builder.queryData[0];
+		expect(firstQueryData?.filter?.expression).toContain(
 			"signoz.workspace.key.id='k2'",
 		);
-		expect(firstQueryData.aggregations[0].metricName).toBe(
-			'signoz.meter.log.size',
-		);
+		const firstAggregation = firstQueryData?.aggregations?.[0] as {
+			metricName: string;
+		};
+		expect(firstAggregation.metricName).toBe('signoz.meter.log.size');
 
 		expect(urlParams.get(QueryParams.yAxisUnit)).toBe('bytes');
 		expect(urlParams.get(QueryParams.ruleName)).toContain('logs');

frontend/src/container/ListAlertRules/useAlertRulesHandlers.ts

@@ -6,6 +6,10 @@ import { sanitizeDefaultAlertQuery } from 'container/EditAlertV2/utils';
 import { useSafeNavigate } from 'hooks/useSafeNavigate';
 import { useTableRowClick } from 'hooks/useTableRowClick';
 import useUrlQuery from 'hooks/useUrlQuery';
+import {
+	applySerializedParams,
+	serialize,
+} from 'lib/compositeQuery/serializer';
 import { mapQueryDataFromApi } from 'lib/newQueryBuilder/queryBuilderMappers/mapQueryDataFromApi';
 import { toCompositeMetricQuery } from 'types/api/alerts/convert';
 import { isModifierKeyPressed } from 'utils/app';
@@ -31,10 +35,7 @@ export function useAlertRulesHandlers(
 				mapQueryDataFromApi(toCompositeMetricQuery(rule.condition.compositeQuery)),
 				rule.alertType,
 			);
-			params.set(
-				QueryParams.compositeQuery,
-				encodeURIComponent(JSON.stringify(compositeQuery)),
-			);
+			applySerializedParams(serialize(compositeQuery), params);
 
 			const panelType = rule.condition.compositeQuery.panelType;
 			if (panelType) {

frontend/src/container/LiveLogs/LiveLogsList/LiveLogsList.styles.scss

@@ -60,3 +60,7 @@
 		}
 	}
 }
+
+.logs-linked-row td {
+	background-color: var(--row-active-bg) !important;
+}

frontend/src/container/LiveLogs/LiveLogsList/index.tsx

@@ -204,6 +204,9 @@ function LiveLogsList({
 							data={formattedLogs}
 							isLoading={false}
 							isRowActive={(log): boolean => log.id === activeLog?.id}
+							getRowClassName={(log): string =>
+								log.id === activeLogId ? 'logs-linked-row' : ''
+							}
 							getRowStyle={(log): CSSProperties =>
 								({
 									'--row-active-bg': getRowBackgroundColor(
@@ -216,10 +219,13 @@ function LiveLogsList({
 									),
 								}) as CSSProperties
 							}
-							onRowClick={(log): void => {
-								handleSetActiveLog(log);
+							onRowClick={(log, _itemKey, { isActive }): void => {
+								if (isActive) {
+									handleCloseLogDetail();
+								} else {
+									handleSetActiveLog(log);
+								}
 							}}
-							onRowDeactivate={handleCloseLogDetail}
 							activeRowIndex={activeLogIndex}
 							renderRowActions={(log): ReactNode => (
 								<LogLinesActionButtons

frontend/src/container/LogDetailedView/ContextView/ContextLogRenderer.tsx

@@ -14,6 +14,10 @@ import { FontSize } from 'container/OptionsMenu/types';
 import { ORDERBY_FILTERS } from 'container/QueryBuilder/filters/OrderByFilter/config';
 import { useQueryBuilder } from 'hooks/queryBuilder/useQueryBuilder';
 import useUrlQuery from 'hooks/useUrlQuery';
+import {
+	applySerializedParams,
+	serialize,
+} from 'lib/compositeQuery/serializer';
 import { ILog } from 'types/api/logs/log';
 import { Query, TagFilter } from 'types/api/queryBuilder/queryBuilderData';
 import { DataSource, StringOperators } from 'types/common/queryBuilder';
@@ -111,10 +115,7 @@ function ContextLogRenderer({
 		(logId: string): void => {
 			urlQuery.set(QueryParams.activeLogId, `"${logId}"`);
 
-			urlQuery.set(
-				QueryParams.compositeQuery,
-				encodeURIComponent(JSON.stringify(query)),
-			);
+			applySerializedParams(serialize(query), urlQuery);
 
 			const link = `${ROUTES.LOGS_EXPLORER}?${urlQuery.toString()}`;
 			window.open(withBasePath(link), '_blank', 'noopener,noreferrer');

frontend/src/container/LogsExplorerList/LogsExplorerList.style.scss

@@ -323,3 +323,7 @@
 		}
 	}
 }
+
+.logs-linked-row td {
+	background-color: var(--row-active-bg) !important;
+}

frontend/src/container/LogsExplorerList/index.tsx

@@ -211,9 +211,11 @@ function LogsExplorerList({
 					data={logs}
 					isLoading={isLoading || isFetching}
 					onEndReached={onEndReached}
-					isRowActive={(log): boolean =>
-						log.id === activeLog?.id || log.id === activeLogId
+					isRowActive={(log): boolean => log.id === activeLog?.id}
+					getRowClassName={(log): string =>
+						log.id === activeLogId ? 'logs-linked-row' : ''
 					}
+					getRowTestId={(log): string => `logs-table-row-${log.id}`}
 					getRowStyle={(log): CSSProperties =>
 						({
 							'--row-active-bg': getRowBackgroundColor(
@@ -226,10 +228,13 @@ function LogsExplorerList({
 							),
 						}) as CSSProperties
 					}
-					onRowClick={(log): void => {
-						handleSetActiveLog(log);
+					onRowClick={(log, _itemKey, { isActive }): void => {
+						if (isActive) {
+							handleCloseLogDetail();
+						} else {
+							handleSetActiveLog(log);
+						}
 					}}
-					onRowDeactivate={handleCloseLogDetail}
 					activeRowIndex={activeLogIndex}
 					renderRowActions={(log): ReactNode => (
 						<LogLinesActionButtons
@@ -282,6 +287,7 @@ function LogsExplorerList({
 		options.maxLines,
 		options.fontSize,
 		activeLogIndex,
+		activeLogId,
 		logs,
 		onEndReached,
 		getItemContent,

frontend/src/container/MetricsApplication/Tabs/Overview.tsx

@@ -247,16 +247,12 @@ function Application(): JSX.Element {
 				const avialableParams = routeConfig[ROUTES.TRACE];
 				const queryString = getQueryString(avialableParams, urlParams);
 
-				const JSONCompositeQuery = encodeURIComponent(
-					JSON.stringify(apmToTraceQuery),
-				);
-
 				const newPath = generateExplorerPath(
 					isViewLogsClicked,
 					urlParams,
 					servicename,
 					selectedTraceTags,
-					JSONCompositeQuery,
+					apmToTraceQuery,
 					queryString,
 				);
 

frontend/src/container/MetricsApplication/Tabs/util.ts

@@ -8,6 +8,10 @@ import { useQueryBuilder } from 'hooks/queryBuilder/useQueryBuilder';
 import useClickOutside from 'hooks/useClickOutside';
 import useResourceAttribute from 'hooks/useResourceAttribute';
 import { resourceAttributesToTracesFilterItems } from 'hooks/useResourceAttribute/utils';
+import {
+	applySerializedParams,
+	serialize,
+} from 'lib/compositeQuery/serializer';
 import createQueryParams from 'lib/createQueryParams';
 import { prepareQueryWithDefaultTimestamp } from 'pages/LogsExplorer/utils';
 import { traceFilterKeys } from 'pages/TracesExplorer/Filter/filterUtils';
@@ -60,16 +64,18 @@ export function generateExplorerPath(
 	urlParams: URLSearchParams,
 	servicename: string | undefined,
 	selectedTraceTags: string,
-	JSONCompositeQuery: string,
+	apmToTraceQuery: Query,
 	queryString: string[],
 ): string {
 	const basePath = isViewLogsClicked
 		? ROUTES.LOGS_EXPLORER
 		: ROUTES.TRACES_EXPLORER;
 
-	return `${basePath}?${urlParams.toString()}&selected={"serviceName":["${servicename}"]}&filterToFetchData=["duration","status","serviceName"]&spanAggregateCurrentPage=1&selectedTags=${selectedTraceTags}&${
-		QueryParams.compositeQuery
-	}=${JSONCompositeQuery}&${queryString.join('&')}`;
+	applySerializedParams(serialize(apmToTraceQuery), urlParams);
+
+	return `${basePath}?${urlParams.toString()}&selected={"serviceName":["${servicename}"]}&filterToFetchData=["duration","status","serviceName"]&spanAggregateCurrentPage=1&selectedTags=${selectedTraceTags}&${queryString.join(
+		'&',
+	)}`;
 }
 
 // TODO(@rahul-signoz): update the name of this function once we have view logs button in every panel
@@ -105,16 +111,12 @@ export function onViewTracePopupClick({
 		const avialableParams = routeConfig[ROUTES.TRACE];
 		const queryString = getQueryString(avialableParams, urlParams);
 
-		const JSONCompositeQuery = encodeURIComponent(
-			JSON.stringify(apmToTraceQuery),
-		);
-
 		const newPath = generateExplorerPath(
 			isViewLogsClicked,
 			urlParams,
 			servicename,
 			selectedTraceTags,
-			JSONCompositeQuery,
+			apmToTraceQuery,
 			queryString,
 		);
 

frontend/src/container/MetricsApplication/utils.ts

@@ -1,5 +1,6 @@
 import { QueryParams } from 'constants/query';
 import ROUTES from 'constants/routes';
+import { serialize } from 'lib/compositeQuery/serializer';
 import { withBasePath } from 'utils/basePath';
 
 import { TopOperationList } from './TopOperationsTable';
@@ -29,13 +30,11 @@ export const navigateToTrace = ({
 	);
 	urlParams.set(QueryParams.endTime, Math.floor(maxTime / 1_000_000).toString());
 
-	const JSONCompositeQuery = encodeURIComponent(JSON.stringify(apmToTraceQuery));
-
 	const newTraceExplorerPath = `${
 		ROUTES.TRACES_EXPLORER
-	}?${urlParams.toString()}&selected={"serviceName":["${servicename}"],"operation":["${operation}"]}&filterToFetchData=["duration","status","serviceName","operation"]&spanAggregateCurrentPage=1&selectedTags=${selectedTraceTags}&${
-		QueryParams.compositeQuery
-	}=${JSONCompositeQuery}`;
+	}?${urlParams.toString()}&selected={"serviceName":["${servicename}"],"operation":["${operation}"]}&filterToFetchData=["duration","status","serviceName","operation"]&spanAggregateCurrentPage=1&selectedTags=${selectedTraceTags}&${serialize(
+		apmToTraceQuery,
+	).toString()}`;
 
 	if (openInNewTab) {
 		window.open(withBasePath(newTraceExplorerPath), '_blank');

frontend/src/container/NewWidget/index.tsx

@@ -33,6 +33,7 @@ import { useKeyboardHotkeys } from 'hooks/hotkeys/useKeyboardHotkeys';
 import { useQueryBuilder } from 'hooks/queryBuilder/useQueryBuilder';
 import { useSafeNavigate } from 'hooks/useSafeNavigate';
 import useUrlQuery from 'hooks/useUrlQuery';
+import { serializeToParams } from 'lib/compositeQuery/serializer';
 import createQueryParams from 'lib/createQueryParams';
 import { GetQueryResultsProps } from 'lib/dashboard/getQueryResults';
 import { getDashboardVariables } from 'lib/dashboardVariables/getDashboardVariables';
@@ -791,9 +792,7 @@ function NewWidget({
 		const queryParams = {
 			[QueryParams.expandedWidgetId]: widgetId,
 			[QueryParams.graphType]: graphType,
-			[QueryParams.compositeQuery]: encodeURIComponent(
-				JSON.stringify(currentQuery),
-			),
+			...serializeToParams(currentQuery),
 			[QueryParams.variables]: variables,
 		};
 

frontend/src/container/QueryTable/Drilldown/__tests__/TableDrilldown.test.tsx

@@ -5,6 +5,7 @@ import { MemoryRouter } from 'react-router-dom';
 import { fireEvent, render, screen } from '@testing-library/react';
 import { Button } from 'antd';
 import ROUTES from 'constants/routes';
+import { deserialize } from 'lib/compositeQuery/serializer';
 import ContextMenu, { useCoordinates } from 'periscope/components/ContextMenu';
 import MockQueryClientProvider from 'providers/test/MockQueryClientProvider';
 import store from 'store';
@@ -189,12 +190,7 @@ describe('TableDrilldown', () => {
 		// Parse the URL to check query parameters
 		const urlObj = new URL(url, 'http://localhost');
 
-		// Check that compositeQuery parameter exists and contains the query with filters
-		expect(urlObj.searchParams.has('compositeQuery')).toBe(true);
-
-		const compositeQuery = JSON.parse(
-			decodeURIComponent(urlObj.searchParams.get('compositeQuery') || '{}'),
-		);
+		const compositeQuery = deserialize(urlObj.searchParams) as Query;
 
 		// Verify the query structure includes the filters from clicked data
 		expect(compositeQuery.builder).toBeDefined();
@@ -265,12 +261,7 @@ describe('TableDrilldown', () => {
 		// Parse the URL to check query parameters
 		const urlObj = new URL(url, 'http://localhost');
 
-		// Check that compositeQuery parameter exists and contains the query with filters
-		expect(urlObj.searchParams.has('compositeQuery')).toBe(true);
-
-		const compositeQuery = JSON.parse(
-			decodeURIComponent(urlObj.searchParams.get('compositeQuery') || '{}'),
-		);
+		const compositeQuery = deserialize(urlObj.searchParams) as Query;
 		// Verify the query structure includes the filters from clicked data
 		expect(compositeQuery.builder).toBeDefined();
 		expect(compositeQuery.builder.queryData).toBeDefined();
@@ -278,7 +269,7 @@ describe('TableDrilldown', () => {
 		// Check that the query contains the correct filter expression
 		// The filter should include the clicked data filters (service.name = 'adservice', trace_id = 'df2cfb0e57bb8736207689851478cd50')
 		const firstQueryData = compositeQuery.builder.queryData[0];
-		expect(firstQueryData.filter.expression).toStrictEqual(
+		expect(firstQueryData.filter?.expression).toStrictEqual(
 			MOCK_QUERY_WITH_FILTER,
 		);
 

frontend/src/container/QueryTable/Drilldown/useBaseDrilldownNavigate.ts

@@ -2,6 +2,7 @@ import { useCallback } from 'react';
 import { QueryParams } from 'constants/query';
 import ROUTES from 'constants/routes';
 import { useSafeNavigate } from 'hooks/useSafeNavigate';
+import { serializeToParams } from 'lib/compositeQuery/serializer';
 import createQueryParams from 'lib/createQueryParams';
 import { Query } from 'types/api/queryBuilder/queryBuilderData';
 
@@ -49,7 +50,7 @@ const useBaseDrilldownNavigate = ({
 
 			const timeRange = aggregateData?.timeRange;
 			let queryParams: Record<string, string> = {
-				[QueryParams.compositeQuery]: encodeURIComponent(JSON.stringify(viewQuery)),
+				...serializeToParams(viewQuery),
 				...(timeRange && {
 					[QueryParams.startTime]: timeRange.startTime.toString(),
 					[QueryParams.endTime]: timeRange.endTime.toString(),
@@ -94,7 +95,7 @@ export function buildDrilldownUrl(
 
 	const timeRange = aggregateData?.timeRange;
 	let queryParams: Record<string, string> = {
-		[QueryParams.compositeQuery]: encodeURIComponent(JSON.stringify(viewQuery)),
+		...serializeToParams(viewQuery),
 		...(timeRange && {
 			[QueryParams.startTime]: timeRange.startTime.toString(),
 			[QueryParams.endTime]: timeRange.endTime.toString(),

frontend/src/container/RoutingPolicies/__tests__/testUtils.ts

@@ -143,10 +143,7 @@ export function mockQueryParams(
 		}
 	});
 
-	return Object.create(URLSearchParams.prototype, {
-		toString: { value: (): string => realUrlQuery.toString() },
-		get: { value: (key: string): string | null => realUrlQuery.get(key) },
-	});
+	return realUrlQuery;
 }
 
 export function convertRoutingPolicyToApiResponse(

frontend/src/container/TopNav/DateTimeSelectionV2/index.tsx

@@ -35,6 +35,11 @@ import { GlobalReducer } from 'types/reducer/globalTime';
 import { addCustomTimeRange } from 'utils/customTimeRangeUtils';
 import { persistTimeDurationForRoute } from 'utils/metricsTimeStorageUtils';
 import { normalizeTimeToMs } from 'utils/timeUtils';
+import {
+	applySerializedParams,
+	deserialize,
+	serialize,
+} from 'lib/compositeQuery/serializer';
 import { v4 as uuid } from 'uuid';
 
 import AutoRefresh from '../AutoRefreshV2';
@@ -278,7 +283,7 @@ function DateTimeSelection({
 		return `Refreshed ${secondsDiff} sec ago`;
 	}, [maxTime, minTime, selectedTime]);
 
-	const getUpdatedCompositeQuery = useCallback((): string => {
+	const getUpdatedCompositeQuery = useCallback((): URLSearchParams => {
 		let updatedCompositeQuery = cloneDeep(currentQuery);
 		updatedCompositeQuery.id = uuid();
 		// Remove the filters
@@ -299,7 +304,7 @@ function DateTimeSelection({
 				})),
 			},
 		};
-		return encodeURIComponent(JSON.stringify(updatedCompositeQuery));
+		return serialize(updatedCompositeQuery);
 	}, [currentQuery]);
 
 	const onSelectHandler = useCallback(
@@ -334,9 +339,9 @@ function DateTimeSelection({
 			// Remove Hidden Filters from URL query parameters on time change
 			urlQuery.delete(QueryParams.activeLogId);
 
-			if (urlQuery.has(QueryParams.compositeQuery)) {
-				const updatedCompositeQuery = getUpdatedCompositeQuery();
-				urlQuery.set(QueryParams.compositeQuery, updatedCompositeQuery);
+			const staledQuery = deserialize(urlQuery);
+			if (staledQuery) {
+				applySerializedParams(getUpdatedCompositeQuery(), urlQuery);
 			}
 
 			const generatedUrl = `${location.pathname}?${urlQuery.toString()}`;
@@ -424,9 +429,9 @@ function DateTimeSelection({
 				urlQuery.set(QueryParams.endTime, endTime?.toDate().getTime().toString());
 				urlQuery.delete(QueryParams.relativeTime);
 
-				if (urlQuery.has(QueryParams.compositeQuery)) {
-					const updatedCompositeQuery = getUpdatedCompositeQuery();
-					urlQuery.set(QueryParams.compositeQuery, updatedCompositeQuery);
+				const staledQuery = deserialize(urlQuery);
+				if (staledQuery) {
+					applySerializedParams(getUpdatedCompositeQuery(), urlQuery);
 				}
 
 				const generatedUrl = `${location.pathname}?${urlQuery.toString()}`;

frontend/src/hooks/__tests__/useSafeNavigate.utils.test.ts

@@ -0,0 +1,170 @@
+import { initialQueriesMap } from 'constants/queryBuilder';
+import {
+	areUrlsEffectivelySame,
+	isDefaultNavigation,
+} from 'hooks/useSafeNavigate.utils';
+import { serialize } from 'lib/compositeQuery/serializer';
+import { Query } from 'types/api/queryBuilder/queryBuilderData';
+
+const BASE = 'http://localhost';
+
+const urlFrom = (pathname: string, params?: URLSearchParams): URL => {
+	const search = params?.toString();
+	const query = search ? `?${search}` : '';
+	return new URL(`${pathname}${query}`, BASE);
+};
+
+/** Build params containing the serialized `compositeQuery` plus any extras. */
+const withQuery = (
+	query: Query,
+	extra: Record<string, string> = {},
+): URLSearchParams => {
+	const params = serialize(query);
+	Object.entries(extra).forEach(([key, value]) => params.set(key, value));
+	return params;
+};
+
+describe('areUrlsEffectivelySame', () => {
+	it('returns false when pathnames differ', () => {
+		expect(areUrlsEffectivelySame(urlFrom('/logs'), urlFrom('/traces'))).toBe(
+			false,
+		);
+	});
+
+	it('returns true for two identical param-less URLs', () => {
+		expect(areUrlsEffectivelySame(urlFrom('/logs'), urlFrom('/logs'))).toBe(true);
+	});
+
+	it('returns true when only the compositeQuery is present and identical', () => {
+		const params = withQuery(initialQueriesMap.logs);
+		expect(
+			areUrlsEffectivelySame(
+				urlFrom('/logs', params),
+				urlFrom('/logs', new URLSearchParams(params.toString())),
+			),
+		).toBe(true);
+	});
+
+	// Regression: a matching compositeQuery must NOT mask differences in other
+	// params. Previously every param was compared via the decoded query, so any
+	// two URLs sharing a compositeQuery were judged identical.
+	it('returns false when compositeQuery matches but another param differs', () => {
+		const url1 = urlFrom(
+			'/logs',
+			withQuery(initialQueriesMap.logs, { startTime: '1000' }),
+		);
+		const url2 = urlFrom(
+			'/logs',
+			withQuery(initialQueriesMap.logs, { startTime: '2000' }),
+		);
+		expect(areUrlsEffectivelySame(url1, url2)).toBe(false);
+	});
+
+	it('returns false when compositeQuery matches but a param exists on only one URL', () => {
+		const url1 = urlFrom(
+			'/logs',
+			withQuery(initialQueriesMap.logs, { startTime: '1000' }),
+		);
+		const url2 = urlFrom('/logs', withQuery(initialQueriesMap.logs));
+		expect(areUrlsEffectivelySame(url1, url2)).toBe(false);
+	});
+
+	it('ignores the volatile id when comparing compositeQuery', () => {
+		const url1 = urlFrom(
+			'/logs',
+			withQuery({ ...initialQueriesMap.logs, id: 'id-1' }),
+		);
+		const url2 = urlFrom(
+			'/logs',
+			withQuery({ ...initialQueriesMap.logs, id: 'id-2' }),
+		);
+		expect(areUrlsEffectivelySame(url1, url2)).toBe(true);
+	});
+
+	it('returns false when compositeQuery is semantically different', () => {
+		const url1 = urlFrom('/logs', withQuery(initialQueriesMap.logs));
+		const url2 = urlFrom('/metrics', withQuery(initialQueriesMap.metrics));
+		// Force same pathname so only the query differs.
+		expect(
+			areUrlsEffectivelySame(
+				url1,
+				urlFrom('/logs', new URLSearchParams(url2.search)),
+			),
+		).toBe(false);
+	});
+
+	it('returns false when compositeQuery exists on only one URL', () => {
+		const url1 = urlFrom('/logs', withQuery(initialQueriesMap.logs));
+		const url2 = urlFrom('/logs');
+		expect(areUrlsEffectivelySame(url1, url2)).toBe(false);
+	});
+
+	it('compares non-compositeQuery params directly when no compositeQuery is present', () => {
+		const same1 = urlFrom(
+			'/logs',
+			new URLSearchParams({ startTime: '1', endTime: '2' }),
+		);
+		const same2 = urlFrom(
+			'/logs',
+			new URLSearchParams({ startTime: '1', endTime: '2' }),
+		);
+		expect(areUrlsEffectivelySame(same1, same2)).toBe(true);
+
+		const diff = urlFrom(
+			'/logs',
+			new URLSearchParams({ startTime: '1', endTime: '3' }),
+		);
+		expect(areUrlsEffectivelySame(same1, diff)).toBe(false);
+	});
+
+	it('falls back to raw comparison when compositeQuery cannot be decoded', () => {
+		const corrupt1 = urlFrom(
+			'/logs',
+			new URLSearchParams({ compositeQuery: '%7Bnot-json' }),
+		);
+		const corrupt2 = urlFrom(
+			'/logs',
+			new URLSearchParams({ compositeQuery: '%7Bnot-json' }),
+		);
+		expect(areUrlsEffectivelySame(corrupt1, corrupt2)).toBe(true);
+
+		const corrupt3 = urlFrom(
+			'/logs',
+			new URLSearchParams({ compositeQuery: '%7Bother' }),
+		);
+		expect(areUrlsEffectivelySame(corrupt1, corrupt3)).toBe(false);
+	});
+});
+
+describe('isDefaultNavigation', () => {
+	it('returns false for different pathnames', () => {
+		expect(isDefaultNavigation(urlFrom('/logs'), urlFrom('/traces'))).toBe(false);
+	});
+
+	it('returns true when a clean URL gains params', () => {
+		expect(
+			isDefaultNavigation(
+				urlFrom('/logs'),
+				urlFrom('/logs', new URLSearchParams({ startTime: '1' })),
+			),
+		).toBe(true);
+	});
+
+	it('returns true when the target introduces a new param key', () => {
+		expect(
+			isDefaultNavigation(
+				urlFrom('/logs', new URLSearchParams({ startTime: '1' })),
+				urlFrom('/logs', new URLSearchParams({ startTime: '1', endTime: '2' })),
+			),
+		).toBe(true);
+	});
+
+	it('returns false when the target has no new param keys', () => {
+		expect(
+			isDefaultNavigation(
+				urlFrom('/logs', new URLSearchParams({ startTime: '1' })),
+				urlFrom('/logs', new URLSearchParams({ startTime: '9' })),
+			),
+		).toBe(false);
+	});
+});

frontend/src/hooks/logs/useActiveLog.ts

@@ -5,7 +5,6 @@ import { useDispatch, useSelector } from 'react-redux';
 import { useHistory, useLocation } from 'react-router-dom';
 import { getAggregateKeys } from 'api/queryBuilder/getAttributeKeys';
 import { SOMETHING_WENT_WRONG } from 'constants/api';
-import { QueryParams } from 'constants/query';
 import { OPERATORS, QueryBuilderKeys } from 'constants/queryBuilder';
 import ROUTES from 'constants/routes';
 import { MetricsType } from 'container/MetricsApplication/constant';
@@ -13,6 +12,7 @@ import { getOperatorValue } from 'container/QueryBuilder/filters/QueryBuilderSea
 import { useQueryBuilder } from 'hooks/queryBuilder/useQueryBuilder';
 import { useNotifications } from 'hooks/useNotifications';
 import useUrlQuery from 'hooks/useUrlQuery';
+import { deserialize } from 'lib/compositeQuery/serializer';
 import { getGeneratedFilterQueryString } from 'lib/getGeneratedFilterQueryString';
 import { chooseAutocompleteFromCustomValue } from 'lib/newQueryBuilder/chooseAutocompleteFromCustomValue';
 import { AppState } from 'store/reducers';
@@ -58,9 +58,14 @@ export const useActiveLog = (): UseActiveLog => {
 
 	const [activeLog, setActiveLog] = useState<ILog | null>(null);
 
-	// Close drawer/clear active log when query in URL changes
+	// Close drawer/clear active log when query in URL changes. Track the decoded
+	// query (not a single raw param) so it stays correct across serializer tiers
+	// that explode the query into many keys.
 	const urlQuery = useUrlQuery();
-	const compositeQuery = urlQuery.get(QueryParams.compositeQuery) ?? '';
+	const compositeQuery = useMemo(() => {
+		const decoded = deserialize(urlQuery);
+		return decoded ? JSON.stringify(decoded) : '';
+	}, [urlQuery]);
 	const prevQueryRef = useRef<string | null>(null);
 	useEffect(() => {
 		if (

frontend/src/hooks/queryBuilder/__tests__/useCreateAlerts.test.tsx

@@ -2,15 +2,17 @@ import { useMutation } from 'react-query';
 // eslint-disable-next-line no-restricted-imports
 import { useSelector } from 'react-redux';
 import { act, renderHook } from '@testing-library/react';
-import { QueryParams } from 'constants/query';
+import { deserialize } from 'lib/compositeQuery/serializer';
 import { mapQueryDataFromApi } from 'lib/newQueryBuilder/queryBuilderMappers/mapQueryDataFromApi';
 import { Widgets } from 'types/api/dashboard/getAll';
+import { Query } from 'types/api/queryBuilder/queryBuilderData';
 import { EQueryType } from 'types/common/dashboard';
 
 import useCreateAlerts from '../useCreateAlerts';
 
 jest.mock('react-query', () => ({
 	useMutation: jest.fn(),
+	QueryClient: jest.fn().mockImplementation(() => ({})),
 }));
 
 jest.mock('react-redux', () => ({
@@ -79,14 +81,14 @@ const buildWidget = (queryType: EQueryType | undefined): Widgets =>
 		},
 	}) as unknown as Widgets;
 
-const getCompositeQueryFromLastOpen = (): Record<string, unknown> => {
+const getCompositeQueryFromLastOpen = (): Query => {
 	const [url] = (window.open as jest.Mock).mock.calls[0];
 	const query = new URLSearchParams((url as string).split('?')[1]);
-	const raw = query.get(QueryParams.compositeQuery);
-	if (!raw) {
+	const composite = deserialize(query);
+	if (!composite) {
 		throw new Error('compositeQuery not found in URL');
 	}
-	return JSON.parse(decodeURIComponent(raw));
+	return composite;
 };
 
 describe('useCreateAlerts', () => {

frontend/src/hooks/queryBuilder/__tests__/useGetCompositeQueryParam.test.ts

@@ -0,0 +1,26 @@
+import { renderHook } from '@testing-library/react';
+import { initialQueriesMap } from 'constants/queryBuilder';
+import { useGetCompositeQueryParam } from 'hooks/queryBuilder/useGetCompositeQueryParam';
+
+let mockUrlQuery = new URLSearchParams();
+
+jest.mock('hooks/useUrlQuery', () => ({
+	__esModule: true,
+	default: (): URLSearchParams => mockUrlQuery,
+}));
+
+describe('useGetCompositeQueryParam', () => {
+	it('decodes a legacy compositeQuery param', () => {
+		mockUrlQuery = new URLSearchParams({
+			compositeQuery: encodeURIComponent(JSON.stringify(initialQueriesMap.logs)),
+		});
+		const { result } = renderHook(() => useGetCompositeQueryParam());
+		expect(result.current?.builder.queryData[0].dataSource).toBe('logs');
+	});
+
+	it('returns null when the param is absent', () => {
+		mockUrlQuery = new URLSearchParams();
+		const { result } = renderHook(() => useGetCompositeQueryParam());
+		expect(result.current).toBeNull();
+	});
+});

frontend/src/hooks/queryBuilder/useCreateAlerts.tsx

@@ -14,6 +14,10 @@ import { MenuItemKeys } from 'container/GridCardLayout/WidgetHeader/contants';
 import { useDashboardVariables } from 'hooks/dashboard/useDashboardVariables';
 import { useDashboardVariablesByType } from 'hooks/dashboard/useDashboardVariablesByType';
 import { useNotifications } from 'hooks/useNotifications';
+import {
+	applySerializedParams,
+	serialize,
+} from 'lib/compositeQuery/serializer';
 import { getDashboardVariables } from 'lib/dashboardVariables/getDashboardVariables';
 import { mapQueryDataFromApi } from 'lib/newQueryBuilder/queryBuilderMappers/mapQueryDataFromApi';
 import { isEmpty } from 'lodash-es';
@@ -91,10 +95,7 @@ const useCreateAlerts = (widget?: Widgets, caller?: string): VoidFunction => {
 				}
 
 				const params = new URLSearchParams();
-				params.set(
-					QueryParams.compositeQuery,
-					encodeURIComponent(JSON.stringify(updatedQuery)),
-				);
+				applySerializedParams(serialize(updatedQuery), params);
 				params.set(QueryParams.panelTypes, widget.panelTypes);
 				params.set(QueryParams.version, ENTITY_VERSION_V5);
 				params.set(QueryParams.source, YAxisSource.DASHBOARDS);

frontend/src/hooks/queryBuilder/useGetCompositeQueryParam.ts

@@ -1,72 +1,10 @@
-import { useMemo } from 'react';
-import {
-	convertAggregationToExpression,
-	convertFiltersToExpressionWithExistingQuery,
-	convertHavingToExpression,
-} from 'components/QueryBuilderV2/utils';
-import { QueryParams } from 'constants/query';
 import useUrlQuery from 'hooks/useUrlQuery';
-import { BaseAutocompleteData } from 'types/api/queryBuilder/queryAutocompleteResponse';
+import { deserialize } from 'lib/compositeQuery/serializer';
+import { useMemo } from 'react';
 import { Query } from 'types/api/queryBuilder/queryBuilderData';
 
 export const useGetCompositeQueryParam = (): Query | null => {
 	const urlQuery = useUrlQuery();
 
-	return useMemo(() => {
-		const compositeQuery = urlQuery.get(QueryParams.compositeQuery);
-		let parsedCompositeQuery: Query | null = null;
-
-		try {
-			if (!compositeQuery) {
-				return null;
-			}
-
-			// MDN reference - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/decodeURIComponent#decoding_query_parameters_from_a_url
-			// MDN reference to support + characters using encoding - https://developer.mozilla.org/en-US/docs/Web/API/URLSearchParams#preserving_plus_signs add later
-			parsedCompositeQuery = JSON.parse(
-				decodeURIComponent(compositeQuery.replace(/\+/g, ' ')),
-			);
-
-			// Convert old format to new format for each query in builder.queryData
-			if (parsedCompositeQuery?.builder?.queryData) {
-				parsedCompositeQuery.builder.queryData =
-					parsedCompositeQuery.builder.queryData.map((query) => {
-						const existingExpression = query.filter?.expression || '';
-						const convertedQuery = { ...query };
-
-						const convertedFilter = convertFiltersToExpressionWithExistingQuery(
-							query.filters || { items: [], op: 'AND' },
-							existingExpression,
-						);
-						convertedQuery.filter = convertedFilter.filter;
-						convertedQuery.filters = convertedFilter.filters;
-
-						// Convert having if needed
-						if (Array.isArray(query.having)) {
-							const convertedHaving = convertHavingToExpression(query.having);
-							convertedQuery.having = convertedHaving;
-						}
-
-						// Convert aggregation if needed
-						if (!query.aggregations && query.aggregateOperator) {
-							const convertedAggregation = convertAggregationToExpression({
-								aggregateOperator: query.aggregateOperator,
-								aggregateAttribute: query.aggregateAttribute as BaseAutocompleteData,
-								dataSource: query.dataSource,
-								timeAggregation: query.timeAggregation,
-								spaceAggregation: query.spaceAggregation,
-								reduceTo: query.reduceTo,
-								temporality: query.temporality,
-							}) as any; // Type assertion to handle union type
-							convertedQuery.aggregations = convertedAggregation;
-						}
-						return convertedQuery;
-					});
-			}
-		} catch (e) {
-			parsedCompositeQuery = null;
-		}
-
-		return parsedCompositeQuery;
-	}, [urlQuery]);
+	return useMemo(() => deserialize(urlQuery), [urlQuery]);
 };

frontend/src/hooks/useCopyToClipboard.ts

@@ -1,62 +0,0 @@
-import { useCallback, useEffect, useRef, useState } from 'react';
-
-const DEFAULT_COPIED_RESET_MS = 2000;
-
-export interface UseCopyToClipboardOptions {
-	/** How long (ms) to keep "copied" state before resetting. Default 2000. */
-	copiedResetMs?: number;
-}
-
-export type ID = number | string | null;
-
-export interface UseCopyToClipboardReturn {
-	/** Copy text to clipboard. Pass an optional id to track which item was copied (e.g. seriesIndex). */
-	copyToClipboard: (text: string, id?: ID) => void;
-	/** True when something was just copied and still within the reset threshold. */
-	isCopied: boolean;
-	/** The id passed to the last successful copy, or null after reset. Use to show "copied" state for a specific item (e.g. copiedId === item.seriesIndex). */
-	id: ID;
-}
-
-export function useCopyToClipboard(
-	options: UseCopyToClipboardOptions = {},
-): UseCopyToClipboardReturn {
-	const { copiedResetMs = DEFAULT_COPIED_RESET_MS } = options;
-	const [state, setState] = useState<{ isCopied: boolean; id: ID }>({
-		isCopied: false,
-		id: null,
-	});
-	const timeoutRef = useRef<ReturnType<typeof setTimeout> | null>(null);
-
-	useEffect(() => {
-		return (): void => {
-			if (timeoutRef.current) {
-				clearTimeout(timeoutRef.current);
-				timeoutRef.current = null;
-			}
-		};
-	}, []);
-
-	const copyToClipboard = useCallback(
-		(text: string, id?: ID): void => {
-			// oxlint-disable-next-line signoz/no-navigator-clipboard
-			navigator.clipboard.writeText(text).then(() => {
-				if (timeoutRef.current) {
-					clearTimeout(timeoutRef.current);
-				}
-				setState({ isCopied: true, id: id ?? null });
-				timeoutRef.current = setTimeout(() => {
-					setState({ isCopied: false, id: null });
-					timeoutRef.current = null;
-				}, copiedResetMs);
-			});
-		},
-		[copiedResetMs],
-	);
-
-	return {
-		copyToClipboard,
-		isCopied: state.isCopied,
-		id: state.id,
-	};
-}

frontend/src/hooks/useSafeNavigate.ts

@@ -1,6 +1,9 @@
+import {
+	areUrlsEffectivelySame,
+	isDefaultNavigation,
+} from 'hooks/useSafeNavigate.utils';
 import { useCallback } from 'react';
 import { useLocation, useNavigate } from 'react-router-dom-v5-compat';
-import { cloneDeep, isEqual } from 'lodash-es';
 import { withBasePath } from 'utils/basePath';
 
 interface NavigateOptions {
@@ -18,77 +21,6 @@ interface UseSafeNavigateProps {
 	preventSameUrlNavigation?: boolean;
 }
 
-const areUrlsEffectivelySame = (url1: URL, url2: URL): boolean => {
-	if (url1.pathname !== url2.pathname) {
-		return false;
-	}
-
-	const params1 = new URLSearchParams(url1.search);
-	const params2 = new URLSearchParams(url2.search);
-
-	const allParams = new Set([...params1.keys(), ...params2.keys()]);
-
-	return [...allParams].every((param) => {
-		if (param === 'compositeQuery') {
-			try {
-				const query1 = params1.get('compositeQuery');
-				const query2 = params2.get('compositeQuery');
-
-				if (!query1 || !query2) {
-					return false;
-				}
-
-				const decoded1 = JSON.parse(decodeURIComponent(query1));
-				const decoded2 = JSON.parse(decodeURIComponent(query2));
-
-				const filtered1 = cloneDeep(decoded1);
-				const filtered2 = cloneDeep(decoded2);
-
-				delete filtered1.id;
-				delete filtered2.id;
-
-				return isEqual(filtered1, filtered2);
-			} catch (error) {
-				console.warn('Error comparing compositeQuery:', error);
-				return false;
-			}
-		}
-
-		return params1.get(param) === params2.get(param);
-	});
-};
-
-/**
- * Determines if this navigation is adding default/initial parameters
- * Returns true if:
- * 1. We're staying on the same page (same pathname)
- * 2. Either:
- *    - Current URL has no params and target URL has params, or
- *    - Target URL has new params that didn't exist in current URL
- */
-const isDefaultNavigation = (currentUrl: URL, targetUrl: URL): boolean => {
-	// Different pathnames means it's not a default navigation
-	if (currentUrl.pathname !== targetUrl.pathname) {
-		return false;
-	}
-
-	const currentParams = new URLSearchParams(currentUrl.search);
-	const targetParams = new URLSearchParams(targetUrl.search);
-
-	// Case 1: Clean URL getting params for the first time
-	if (!currentParams.toString() && targetParams.toString()) {
-		return true;
-	}
-
-	// Case 2: Check for new params that didn't exist before
-	const currentKeys = new Set(currentParams.keys());
-	const targetKeys = new Set(targetParams.keys());
-
-	// Find keys that exist in target but not in current
-	const newKeys = [...targetKeys].filter((key) => !currentKeys.has(key));
-
-	return newKeys.length > 0;
-};
 export const useSafeNavigate = (
 	{ preventSameUrlNavigation }: UseSafeNavigateProps = {
 		preventSameUrlNavigation: true,

frontend/src/hooks/useSafeNavigate.utils.ts

@@ -0,0 +1,103 @@
+import { deserialize } from 'lib/compositeQuery/serializer';
+import { COMPOSITE_QUERY_KEY } from 'lib/compositeQuery/constants';
+import { isEqual } from 'lodash-es';
+
+/**
+ * Compare the (optional) `compositeQuery` param of two URLSearchParams
+ * semantically. Its serialized form is not byte-stable — the volatile `id` and
+ * the adapter choice both vary — so we decode and deep-compare, ignoring `id`.
+ *
+ * compositeQuery is not guaranteed to be present: absent on both sides counts
+ * as equal, present on only one side counts as different. When either side is
+ * present but can't be decoded, we fall back to comparing the raw values.
+ */
+const compositeQueriesEqual = (
+	params1: URLSearchParams,
+	params2: URLSearchParams,
+): boolean => {
+	const raw1 = params1.get(COMPOSITE_QUERY_KEY);
+	const raw2 = params2.get(COMPOSITE_QUERY_KEY);
+
+	if (!raw1 && !raw2) {
+		return true;
+	}
+	if (!raw1 || !raw2) {
+		return false;
+	}
+
+	try {
+		const decoded1 = deserialize(params1);
+		const decoded2 = deserialize(params2);
+
+		if (decoded1 && decoded2) {
+			// Ignore the volatile `id` when comparing queries.
+			const { id: _id1, ...rest1 } = decoded1;
+			const { id: _id2, ...rest2 } = decoded2;
+
+			return isEqual(rest1, rest2);
+		}
+	} catch (error) {
+		console.warn('Error comparing compositeQuery:', error);
+	}
+
+	// One or both could not be decoded — compare the raw encoded values.
+	return raw1 === raw2;
+};
+
+export const areUrlsEffectivelySame = (url1: URL, url2: URL): boolean => {
+	if (url1.pathname !== url2.pathname) {
+		return false;
+	}
+
+	const params1 = new URLSearchParams(url1.search);
+	const params2 = new URLSearchParams(url2.search);
+
+	// The compositeQuery is compared semantically (it round-trips through a
+	// non-stable serialized form); every other param is compared by raw value.
+	if (!compositeQueriesEqual(params1, params2)) {
+		return false;
+	}
+
+	const otherKeys = new Set(
+		[...params1.keys(), ...params2.keys()].filter(
+			(key) => key !== COMPOSITE_QUERY_KEY,
+		),
+	);
+
+	return [...otherKeys].every((key) => params1.get(key) === params2.get(key));
+};
+
+/**
+ * Determines if this navigation is adding default/initial parameters
+ * Returns true if:
+ * 1. We're staying on the same page (same pathname)
+ * 2. Either:
+ *    - Current URL has no params and target URL has params, or
+ *    - Target URL has new params that didn't exist in current URL
+ */
+export const isDefaultNavigation = (
+	currentUrl: URL,
+	targetUrl: URL,
+): boolean => {
+	// Different pathnames means it's not a default navigation
+	if (currentUrl.pathname !== targetUrl.pathname) {
+		return false;
+	}
+
+	const currentParams = new URLSearchParams(currentUrl.search);
+	const targetParams = new URLSearchParams(targetUrl.search);
+
+	// Case 1: Clean URL getting params for the first time
+	if (!currentParams.toString() && targetParams.toString()) {
+		return true;
+	}
+
+	// Case 2: Check for new params that didn't exist before
+	const currentKeys = new Set(currentParams.keys());
+	const targetKeys = new Set(targetParams.keys());
+
+	// Find keys that exist in target but not in current
+	const newKeys = [...targetKeys].filter((key) => !currentKeys.has(key));
+
+	return newKeys.length > 0;
+};

frontend/src/lib/compositeQuery/__tests__/serializer.test.ts

@@ -0,0 +1,51 @@
+import { initialQueriesMap } from 'constants/queryBuilder';
+import { COMPOSITE_QUERY_KEY } from 'lib/compositeQuery/constants';
+import {
+	clearSerializedParams,
+	deserialize,
+	serialize,
+} from 'lib/compositeQuery/serializer';
+
+describe('composite query serializer', () => {
+	it('round-trips through serialize/deserialize', () => {
+		const query = initialQueriesMap.logs;
+		const decoded = deserialize(serialize(query));
+		expect(decoded?.builder.queryData[0].dataSource).toBe('logs');
+	});
+
+	it('returns null on corrupt input instead of throwing', () => {
+		const params = new URLSearchParams();
+		params.set(COMPOSITE_QUERY_KEY, '%7Bnot-json');
+		expect(deserialize(params)).toBeNull();
+	});
+
+	it('returns null for empty/missing value', () => {
+		const params = new URLSearchParams();
+		expect(deserialize(params)).toBeNull();
+	});
+
+	it('preserves id field through roundtrip', () => {
+		const query = { ...initialQueriesMap.metrics, id: 'test-query-uuid-123' };
+		const serialized = serialize(query);
+		const decoded = deserialize(serialized);
+		expect(decoded?.id).toBe('test-query-uuid-123');
+	});
+
+	it('clearSerializedParams purges every serialized key, leaving others intact', () => {
+		const params = serialize(initialQueriesMap.logs);
+		params.set('panelTypes', 'list');
+		clearSerializedParams(params);
+		expect(params.has(COMPOSITE_QUERY_KEY)).toBe(false);
+		expect(deserialize(params)).toBeNull();
+		expect(params.get('panelTypes')).toBe('list');
+	});
+
+	it('clearSerializedParams drops a corrupt legacy key via fallback', () => {
+		const params = new URLSearchParams();
+		params.set(COMPOSITE_QUERY_KEY, '%7Bnot-json');
+		params.set('panelTypes', 'list');
+		clearSerializedParams(params);
+		expect(params.has(COMPOSITE_QUERY_KEY)).toBe(false);
+		expect(params.get('panelTypes')).toBe('list');
+	});
+});

frontend/src/lib/compositeQuery/adapters/json/index.ts

@@ -0,0 +1,74 @@
+import {
+	convertAggregationToExpression,
+	convertFiltersToExpressionWithExistingQuery,
+	convertHavingToExpression,
+} from 'components/QueryBuilderV2/utils';
+import { COMPOSITE_QUERY_KEY } from 'lib/compositeQuery/constants';
+import type { CompositeQueryAdapter } from 'lib/compositeQuery/types';
+import type { BaseAutocompleteData } from 'types/api/queryBuilder/queryAutocompleteResponse';
+import type { Query } from 'types/api/queryBuilder/queryBuilderData';
+
+function migrateLegacyFormat(parsed: Query): Query {
+	if (!parsed?.builder?.queryData) {
+		return parsed;
+	}
+	const next = parsed;
+	next.builder.queryData = parsed.builder.queryData.map((query) => {
+		const existingExpression = query.filter?.expression || '';
+		const convertedQuery = { ...query };
+
+		const convertedFilter = convertFiltersToExpressionWithExistingQuery(
+			query.filters || { items: [], op: 'AND' },
+			existingExpression,
+		);
+		convertedQuery.filter = convertedFilter.filter;
+		convertedQuery.filters = convertedFilter.filters;
+
+		if (Array.isArray(query.having)) {
+			convertedQuery.having = convertHavingToExpression(query.having);
+		}
+
+		if (!query.aggregations && query.aggregateOperator) {
+			convertedQuery.aggregations = convertAggregationToExpression({
+				aggregateOperator: query.aggregateOperator,
+				aggregateAttribute: query.aggregateAttribute as BaseAutocompleteData,
+				dataSource: query.dataSource,
+				timeAggregation: query.timeAggregation,
+				spaceAggregation: query.spaceAggregation,
+				reduceTo: query.reduceTo,
+				temporality: query.temporality,
+				// eslint-disable-next-line @typescript-eslint/no-explicit-any
+			}) as any;
+		}
+		return convertedQuery;
+	});
+	return next;
+}
+
+export const jsonAdapter: CompositeQueryAdapter = {
+	name: 'json(legacy)',
+	encode: (query) => {
+		const params = new URLSearchParams();
+		params.set(COMPOSITE_QUERY_KEY, JSON.stringify(query));
+		return params;
+	},
+	matches: () => true,
+	decode: (params) => {
+		const raw = params.get(COMPOSITE_QUERY_KEY);
+		if (!raw) {
+			return null;
+		}
+
+		try {
+			let parsed: Query;
+			try {
+				parsed = JSON.parse(raw);
+			} catch {
+				parsed = JSON.parse(decodeURIComponent(raw.replace(/\+/g, ' ')));
+			}
+			return migrateLegacyFormat(parsed);
+		} catch {
+			return null;
+		}
+	},
+};

frontend/src/lib/compositeQuery/adapters/json/json.test.ts

@@ -0,0 +1,216 @@
+import { initialQueriesMap } from 'constants/queryBuilder';
+import { COMPOSITE_QUERY_KEY } from 'lib/compositeQuery/constants';
+import { Query } from 'types/api/queryBuilder/queryBuilderData';
+
+import { jsonAdapter } from './index';
+
+const roundTrip = (query: Query): Query => {
+	const decoded = jsonAdapter.decode(jsonAdapter.encode(query));
+	if (!decoded) {
+		throw new Error('roundTrip: decode returned null');
+	}
+	return decoded;
+};
+
+describe('jsonAdapter', () => {
+	describe('round-trip', () => {
+		it.each(['metrics', 'logs', 'traces'] as const)(
+			'round-trips %s baseline preserving dataSource',
+			(source) => {
+				const query = initialQueriesMap[source];
+				const decoded = roundTrip(query);
+				expect(decoded?.builder.queryData[0].dataSource).toBe(source);
+			},
+		);
+	});
+
+	describe('encoding', () => {
+		it('encodes using single URL encoding via URLSearchParams', () => {
+			const query = initialQueriesMap.logs;
+			const params = jsonAdapter.encode(query);
+			const raw = params.get(COMPOSITE_QUERY_KEY) ?? '';
+
+			// URLSearchParams.get() returns decoded value, so raw === JSON string
+			expect(raw).toBe(JSON.stringify(query));
+			expect(raw.startsWith('{')).toBe(true);
+
+			// Full URL shows single encoding
+			const fullUrl = params.toString();
+			expect(fullUrl).toContain('%7B'); // encoded {
+			expect(fullUrl).not.toContain('%257B'); // NOT double-encoded
+		});
+
+		it('decode handles single-encoded format (current)', () => {
+			const query = initialQueriesMap.logs;
+			const params = new URLSearchParams();
+			params.set(COMPOSITE_QUERY_KEY, JSON.stringify(query));
+
+			const decoded = jsonAdapter.decode(params);
+			expect(decoded?.builder.queryData[0].dataSource).toBe('logs');
+		});
+	});
+
+	describe('legacy double-encoded fallback', () => {
+		it('decode handles double-encoded format (legacy URLs)', () => {
+			const query = initialQueriesMap.logs;
+			// Simulate legacy: JSON -> encodeURIComponent -> set as raw param
+			const doubleEncoded = encodeURIComponent(JSON.stringify(query));
+			const params = new URLSearchParams();
+			params.set(COMPOSITE_QUERY_KEY, doubleEncoded);
+
+			const decoded = jsonAdapter.decode(params);
+			expect(decoded?.builder.queryData[0].dataSource).toBe('logs');
+		});
+
+		it('double-encoded with special chars decodes correctly', () => {
+			const queryWithSpecialChars = {
+				...initialQueriesMap.logs,
+				builder: {
+					...initialQueriesMap.logs.builder,
+					queryData: [
+						{
+							...initialQueriesMap.logs.builder.queryData[0],
+							filters: {
+								op: 'AND',
+								items: [
+									{
+										key: { key: 'message', dataType: 'string', type: 'tag' },
+										op: '=',
+										value: 'hello world & foo=bar',
+									},
+								],
+							},
+						},
+					],
+				},
+			};
+			const doubleEncoded = encodeURIComponent(
+				JSON.stringify(queryWithSpecialChars),
+			);
+			const params = new URLSearchParams();
+			params.set(COMPOSITE_QUERY_KEY, doubleEncoded);
+
+			const decoded = jsonAdapter.decode(params);
+			const filter = decoded?.builder.queryData[0].filters?.items[0];
+			expect(filter?.value).toBe('hello world & foo=bar');
+		});
+	});
+
+	describe('plus-sign handling', () => {
+		it('plus signs in double-encoded URLs decode as spaces', () => {
+			// In URL encoding, + represents space. Legacy URLs may have this.
+			const query = { queryType: 'builder', test: 'hello world' };
+			// Manually create double-encoded with + for space
+			const jsonStr = JSON.stringify(query);
+			const encoded = encodeURIComponent(jsonStr).replace(/%20/g, '+');
+
+			const params = new URLSearchParams();
+			params.set(COMPOSITE_QUERY_KEY, encoded);
+
+			const decoded = jsonAdapter.decode(params) as any;
+			expect(decoded.test).toBe('hello world');
+		});
+
+		it('plus signs in filter values preserved after decode', () => {
+			// Value literally contains + (not space)
+			const queryWithPlus = {
+				...initialQueriesMap.logs,
+				builder: {
+					...initialQueriesMap.logs.builder,
+					queryData: [
+						{
+							...initialQueriesMap.logs.builder.queryData[0],
+							filters: {
+								op: 'AND',
+								items: [
+									{
+										key: { key: 'expr', dataType: 'string', type: 'tag' },
+										op: '=',
+										value: '1+2=3',
+									},
+								],
+							},
+						},
+					],
+				},
+			};
+
+			// Current format (single encode) - + becomes %2B
+			const params = jsonAdapter.encode(queryWithPlus as Query);
+			const decoded = jsonAdapter.decode(params);
+			expect(decoded?.builder.queryData[0].filters?.items[0]?.value).toBe('1+2=3');
+		});
+
+		it('legacy double-encoded + in values preserved', () => {
+			const queryWithPlus = {
+				queryType: 'builder',
+				builder: {
+					queryData: [
+						{
+							dataSource: 'logs',
+							queryName: 'A',
+							filters: {
+								op: 'AND',
+								items: [{ key: { key: 'x' }, op: '=', value: 'a+b' }],
+							},
+						},
+					],
+					queryFormulas: [],
+				},
+				promql: [],
+				clickhouse_sql: [],
+				id: 'x',
+				unit: '',
+			};
+			// Double encode: + in JSON becomes %2B, then %252B
+			const doubleEncoded = encodeURIComponent(JSON.stringify(queryWithPlus));
+			const params = new URLSearchParams();
+			params.set(COMPOSITE_QUERY_KEY, doubleEncoded);
+
+			const decoded = jsonAdapter.decode(params);
+			expect(decoded?.builder.queryData[0].filters?.items[0]?.value).toBe('a+b');
+		});
+	});
+
+	describe('tag matching', () => {
+		it('matches any value (catch-all fallback)', () => {
+			const params1 = new URLSearchParams();
+			params1.set(COMPOSITE_QUERY_KEY, '%7B%22queryType%22%3A%22builder%22%7D');
+			expect(jsonAdapter.matches(params1)).toBe(true);
+
+			const params2 = new URLSearchParams();
+			params2.set(COMPOSITE_QUERY_KEY, 'z1~abc');
+			expect(jsonAdapter.matches(params2)).toBe(true);
+		});
+	});
+
+	describe('migration', () => {
+		it('migrates old format (filters -> filter.expression)', () => {
+			const legacy = {
+				queryType: 'builder',
+				builder: {
+					queryData: [
+						{
+							dataSource: 'logs',
+							queryName: 'A',
+							filters: { op: 'AND', items: [] },
+							aggregateOperator: 'count',
+							aggregateAttribute: { key: '', dataType: '', type: '' },
+						},
+					],
+					queryFormulas: [],
+					queryTraceOperator: [],
+				},
+				promql: [],
+				clickhouse_sql: [],
+				id: 'x',
+				unit: '',
+			};
+			const params = new URLSearchParams();
+			params.set(COMPOSITE_QUERY_KEY, JSON.stringify(legacy));
+			const decoded = jsonAdapter.decode(params);
+			expect(decoded?.builder.queryData[0].filter).toBeDefined();
+			expect(decoded?.builder.queryData[0].aggregations).toBeDefined();
+		});
+	});
+});

frontend/src/lib/compositeQuery/constants.ts

@@ -0,0 +1 @@
+export const COMPOSITE_QUERY_KEY = 'compositeQuery';

frontend/src/lib/compositeQuery/serializer.ts

@@ -0,0 +1,78 @@
+import { jsonAdapter } from 'lib/compositeQuery/adapters/json';
+import { COMPOSITE_QUERY_KEY } from 'lib/compositeQuery/constants';
+import type { CompositeQueryAdapter } from 'lib/compositeQuery/types';
+import type { Query } from 'types/api/queryBuilder/queryBuilderData';
+
+// Order matters for decode: most-specific (tagged) adapters first
+const ADAPTERS: CompositeQueryAdapter[] = [jsonAdapter];
+
+// Pick the adapter that owns a given URL. json's `matches` is always true, so
+// it serves as the final fallback when no tagged adapter claims the params.
+function adapterFor(params: URLSearchParams): CompositeQueryAdapter {
+	return ADAPTERS.find((adapter) => adapter.matches(params)) ?? jsonAdapter;
+}
+
+/**
+ * Encode a query to the shortest available URLSearchParams.
+ */
+export function serialize(query: Query): URLSearchParams {
+	return ADAPTERS[0].encode(query);
+}
+
+/**
+ * Decode URLSearchParams back to a Query. Total: returns null on any failure.
+ */
+export function deserialize(params: URLSearchParams): Query | null {
+	const hasParams = params.toString().length > 0;
+	if (!hasParams) {
+		return null;
+	}
+	return adapterFor(params).decode(params);
+}
+
+/**
+ * Apply all params from source into target URLSearchParams.
+ */
+export function applySerializedParams(
+	source: URLSearchParams,
+	target: URLSearchParams,
+): void {
+	source.forEach((value, key) => target.set(key, value));
+}
+
+/**
+ * Remove every serialized-query param from target URLSearchParams. Use instead
+ * of `target.delete('compositeQuery')` so a stale query is fully purged even
+ * for adapters that explode a query into many content-dependent keys (e.g.
+ * `query0.ds`, `query0.fl.it.0.key.key`) which can't be listed statically.
+ *
+ * Keys are discovered by round-trip: decode the current params with their
+ * owning adapter, re-encode, then delete exactly the keys encoding produces.
+ * If the params don't decode (absent/corrupt), fall back to dropping the legacy
+ * single key so a stale `compositeQuery` is still cleared.
+ */
+export function clearSerializedParams(target: URLSearchParams): void {
+	const adapter = adapterFor(target);
+	try {
+		const decoded = adapter.decode(target);
+		if (!decoded) {
+			target.delete(COMPOSITE_QUERY_KEY);
+			return;
+		}
+		adapter.encode(decoded).forEach((_value, key) => {
+			target.delete(key);
+		});
+	} catch {
+		target.delete(COMPOSITE_QUERY_KEY);
+	}
+}
+
+/**
+ * Serialize a query to a plain record of all URL params it produces. Use when
+ * building a query-param object manually (e.g. for `createQueryParams`), so the
+ * call site carries every param the adapter emits — not just `compositeQuery`.
+ * Spread it: `{ ...serializeToParams(query), startTime, endTime }`.
+ */
+export function serializeToParams(query: Query): Record<string, string> {
+	return Object.fromEntries(serialize(query));
+}

frontend/src/lib/compositeQuery/types.ts

@@ -0,0 +1,13 @@
+import type { Query } from 'types/api/queryBuilder/queryBuilderData';
+
+/**
+ * A serialization tier. `encode` returns URLSearchParams (default key =
+ * `compositeQuery`). `matches` checks if params belong to this adapter.
+ * `decode` receives URLSearchParams and returns Query or null if missing/invalid.
+ */
+export interface CompositeQueryAdapter {
+	readonly name: string;
+	encode(query: Query): URLSearchParams;
+	matches(params: URLSearchParams): boolean;
+	decode(params: URLSearchParams): Query | null;
+}

frontend/src/lib/uPlotV2/components/Legend/Legend.tsx

@@ -1,13 +1,11 @@
 import { useCallback, useMemo, useRef, useState } from 'react';
 import { VirtuosoGrid } from 'react-virtuoso';
 import { Input } from 'antd';
-import { Button } from '@signozhq/ui/button';
 import { TooltipSimple } from '@signozhq/ui/tooltip';
 import cx from 'classnames';
-import { useCopyToClipboard } from 'hooks/useCopyToClipboard';
 import { useResizeObserver } from 'hooks/useDimensions';
 import { LegendItem } from 'lib/uPlotV2/config/types';
-import { Check, Copy } from '@signozhq/icons';
+import CopyButton from 'periscope/components/CopyButton/CopyButton';
 
 import { LegendPosition, LegendProps } from '../types';
 
@@ -33,7 +31,6 @@ export default function Legend({
 }: LegendProps): JSX.Element {
 	const legendContainerRef = useRef<HTMLDivElement | null>(null);
 	const [legendSearchQuery, setLegendSearchQuery] = useState('');
-	const { copyToClipboard, id: copiedId } = useCopyToClipboard();
 
 	// Search is intrinsic to the right-positioned legend.
 	const searchEnabled = position === LegendPosition.RIGHT;
@@ -57,17 +54,8 @@ export default function Legend({
 		return items.filter((item) => item.label?.toLowerCase().includes(query));
 	}, [searchEnabled, legendSearchQuery, items]);
 
-	const handleCopyLegendItem = useCallback(
-		(e: React.MouseEvent, seriesIndex: number, label: string): void => {
-			e.stopPropagation();
-			copyToClipboard(label, seriesIndex);
-		},
-		[copyToClipboard],
-	);
-
 	const renderLegendItem = useCallback(
 		(item: LegendItem): JSX.Element => {
-			const isCopied = copiedId === item.seriesIndex;
 			// `color` is uPlot's stroke union (string | fn | gradient); only a string
 			// is a usable CSS colour for the marker.
 			const markerColor = typeof item.color === 'string' ? item.color : undefined;
@@ -91,36 +79,18 @@ export default function Legend({
 						</div>
 					</TooltipSimple>
 					{showCopy && (
-						<TooltipSimple
-							title={isCopied ? 'Copied' : 'Copy'}
-							arrow
-							side="top"
-							disableHoverableContent
-						>
-							<Button
-								type="button"
-								size="icon"
-								variant="ghost"
-								color="secondary"
-								className="legend-copy-button"
-								onClick={(e): void =>
-									handleCopyLegendItem(e, item.seriesIndex, item.label ?? '')
-								}
-								aria-label={`Copy ${item.label}`}
-								// data-testid (not testId): TooltipSimple's trigger injects
-								// data-testid:undefined via Radix Slot, and Button spreads
-								// incoming props after its own testId — so set it as a prop
-								// that wins the Slot merge and survives the spread.
-								data-testid="legend-copy"
-							>
-								{isCopied ? <Check size={12} /> : <Copy size={12} />}
-							</Button>
-						</TooltipSimple>
+						<CopyButton
+							value={item.label ?? ''}
+							size={12}
+							className="legend-copy-button"
+							ariaLabel={`Copy ${item.label}`}
+							testId="legend-copy"
+						/>
 					)}
 				</div>
 			);
 		},
-		[copiedId, focusedSeriesIndex, handleCopyLegendItem, position, showCopy],
+		[focusedSeriesIndex, position, showCopy],
 	);
 
 	const isEmptyState = useMemo(() => {

frontend/src/lib/uPlotV2/components/__tests__/UPlotLegend.test.tsx

@@ -1,11 +1,5 @@
 import React from 'react';
-import {
-	fireEvent,
-	render,
-	RenderResult,
-	screen,
-	within,
-} from '@testing-library/react';
+import { render, RenderResult, screen } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
 import { TooltipProvider } from '@signozhq/ui/tooltip';
 import { LegendItem } from 'lib/uPlotV2/config/types';
@@ -15,9 +9,6 @@ import { useLegendActions } from '../../hooks/useLegendActions';
 import UPlotLegend from '../Legend/UPlotLegend';
 import { LegendPosition } from '../types';
 
-const mockWriteText = jest.fn().mockResolvedValue(undefined);
-let clipboardSpy: jest.SpyInstance | undefined;
-
 jest.mock('react-virtuoso', () => ({
 	VirtuosoGrid: ({
 		data,
@@ -49,15 +40,6 @@ const mockUseLegendActions = useLegendActions as jest.MockedFunction<
 >;
 
 describe('UPlotLegend', () => {
-	beforeAll(() => {
-		// JSDOM does not define navigator.clipboard; add it so we can spy on writeText
-		Object.defineProperty(navigator, 'clipboard', {
-			value: { writeText: () => Promise.resolve() },
-			writable: true,
-			configurable: true,
-		});
-	});
-
 	const baseLegendItemsMap = {
 		0: {
 			seriesIndex: 0,
@@ -89,11 +71,6 @@ describe('UPlotLegend', () => {
 		onLegendMouseMove = jest.fn();
 		onLegendMouseLeave = jest.fn();
 		onFocusSeries = jest.fn();
-		mockWriteText.mockClear();
-
-		clipboardSpy = jest
-			.spyOn(navigator.clipboard, 'writeText')
-			.mockImplementation(mockWriteText);
 
 		mockUseLegendsSync.mockReturnValue({
 			legendItemsMap: baseLegendItemsMap,
@@ -110,7 +87,6 @@ describe('UPlotLegend', () => {
 	});
 
 	afterEach(() => {
-		clipboardSpy?.mockRestore();
 		jest.clearAllMocks();
 	});
 
@@ -237,47 +213,4 @@ describe('UPlotLegend', () => {
 			expect(onLegendMouseLeave).toHaveBeenCalledTimes(1);
 		});
 	});
-
-	describe('copy action', () => {
-		it('copies the legend label to clipboard when copy button is clicked', () => {
-			renderLegend(LegendPosition.RIGHT);
-
-			const firstLegendItem = document.querySelector(
-				'[data-legend-item-id="0"]',
-			) as HTMLElement;
-			const copyButton = within(firstLegendItem).getByTestId('legend-copy');
-
-			fireEvent.click(copyButton);
-
-			expect(mockWriteText).toHaveBeenCalledTimes(1);
-			expect(mockWriteText).toHaveBeenCalledWith('A');
-		});
-
-		it('copies the correct label when copy is clicked on a different legend item', () => {
-			renderLegend(LegendPosition.RIGHT);
-
-			const thirdLegendItem = document.querySelector(
-				'[data-legend-item-id="2"]',
-			) as HTMLElement;
-			const copyButton = within(thirdLegendItem).getByTestId('legend-copy');
-
-			fireEvent.click(copyButton);
-
-			expect(mockWriteText).toHaveBeenCalledTimes(1);
-			expect(mockWriteText).toHaveBeenCalledWith('C');
-		});
-
-		it('does not call onLegendClick when copy button is clicked', () => {
-			renderLegend(LegendPosition.RIGHT);
-
-			const firstLegendItem = document.querySelector(
-				'[data-legend-item-id="0"]',
-			) as HTMLElement;
-			const copyButton = within(firstLegendItem).getByTestId('legend-copy');
-
-			fireEvent.click(copyButton);
-
-			expect(onLegendClick).not.toHaveBeenCalled();
-		});
-	});
 });

frontend/src/pages/DashboardPageV2/DashboardContainer/PanelEditor/__tests__/newPanelRoute.test.ts

@@ -1,4 +1,5 @@
 import { PANEL_TYPES } from 'constants/queryBuilder';
+import { deserialize } from 'lib/compositeQuery/serializer';
 import type { Query } from 'types/api/queryBuilder/queryBuilderData';
 
 import {
@@ -49,13 +50,9 @@ describe('newPanelRoute', () => {
 			return { path, params: new URLSearchParams(search) };
 		};
 
-		// Mirrors useGetCompositeQueryParam: it decodes the param twice.
-		const readCompositeQuery = (params: URLSearchParams): unknown =>
-			JSON.parse(
-				decodeURIComponent(
-					(params.get('compositeQuery') as string).replace(/\+/g, ' '),
-				),
-			);
+		// The real reader — the same entry point `useGetCompositeQueryParam` uses.
+		const readCompositeQuery = (params: URLSearchParams): Query | null =>
+			deserialize(params);
 
 		it.each([
 			[PANEL_TYPES.TIME_SERIES, 'signoz/TimeSeriesPanel'],
@@ -85,15 +82,14 @@ describe('newPanelRoute', () => {
 			expect(readCompositeQuery(params)).toStrictEqual(query);
 		});
 
-		// Regression: a bare `%`/`+` must survive the reader's double-decode.
+		// Regression: a bare `%`/`+` must survive URL encode/decode intact.
 		it('round-trips a filter expression containing % and + literals', () => {
+			const expression = "severity_text ILIKE 'Inf%' AND path = 'a+b'";
 			const queryWithLiterals = {
 				id: 'q1',
 				queryType: 'builder',
 				builder: {
-					queryData: [
-						{ filter: { expression: "severity_text ILIKE 'Inf%' AND path = 'a+b'" } },
-					],
+					queryData: [{ filter: { expression } }],
 				},
 			} as unknown as Query;
 			const link = buildExportPanelLink({
@@ -102,7 +98,9 @@ describe('newPanelRoute', () => {
 				query: queryWithLiterals,
 			});
 			const { params } = parseLink(link);
-			expect(readCompositeQuery(params)).toStrictEqual(queryWithLiterals);
+			expect(
+				readCompositeQuery(params)?.builder.queryData[0].filter?.expression,
+			).toBe(expression);
 		});
 
 		it('returns null for a panel type with no V2 kind', () => {

frontend/src/pages/DashboardPageV2/DashboardContainer/PanelEditor/hooks/__tests__/usePanelEditorQuerySync.integration.test.tsx

@@ -4,8 +4,8 @@ import type {
 	DashboardtypesQueryDTO,
 	TelemetrytypesSignalDTO,
 } from 'api/generated/services/sigNoz.schemas';
-import { QueryParams } from 'constants/query';
 import { initialQueriesMap, PANEL_TYPES } from 'constants/queryBuilder';
+import { serialize } from 'lib/compositeQuery/serializer';
 import type { Query } from 'types/api/queryBuilder/queryBuilderData';
 import { DataSource } from 'types/common/queryBuilder';
 import { AllTheProviders } from 'tests/test-utils';
@@ -50,11 +50,7 @@ function makePanel(queries: DashboardtypesQueryDTO[]): DashboardtypesPanelDTO {
 function makeUrlWrapper(
 	query: Query,
 ): ({ children }: { children: React.ReactNode }) => JSX.Element {
-	const params = new URLSearchParams();
-	params.set(
-		QueryParams.compositeQuery,
-		encodeURIComponent(JSON.stringify(query)),
-	);
+	const params = serialize(query);
 	return function UrlWrapper({
 		children,
 	}: {

frontend/src/pages/DashboardPageV2/DashboardContainer/PanelEditor/hooks/__tests__/useSwitchToViewMode.test.ts

@@ -1,6 +1,7 @@
 import { renderHook } from '@testing-library/react';
 import type { DashboardtypesPanelSpecDTO } from 'api/generated/services/sigNoz.schemas';
 import { PANEL_TYPES } from 'constants/queryBuilder';
+import { deserialize } from 'lib/compositeQuery/serializer';
 import {
 	clearViewPanelHandoff,
 	readViewPanelHandoff,
@@ -56,11 +57,7 @@ describe('useSwitchToViewMode', () => {
 		expect(target.pathname).toBe('/dashboard/dash-1');
 		expect(target.searchParams.get('expandedWidgetId')).toBe('panel-1');
 		expect(target.searchParams.get('graphType')).toBe(PANEL_TYPES.TIME_SERIES);
-		expect(
-			JSON.parse(
-				decodeURIComponent(target.searchParams.get('compositeQuery') || ''),
-			),
-		).toStrictEqual(query);
+		expect(deserialize(target.searchParams)).toStrictEqual(query);
 	});
 
 	it('stashes the live draft spec in the sessionStorage handoff, not the URL', () => {

frontend/src/pages/DashboardPageV2/DashboardContainer/PanelEditor/hooks/useSwitchToViewMode.ts

@@ -6,6 +6,10 @@ import type { PANEL_TYPES } from 'constants/queryBuilder';
 import ROUTES from 'constants/routes';
 import { useSafeNavigate } from 'hooks/useSafeNavigate';
 import useUrlQuery from 'hooks/useUrlQuery';
+import {
+	applySerializedParams,
+	serialize,
+} from 'lib/compositeQuery/serializer';
 import type { Query } from 'types/api/queryBuilder/queryBuilderData';
 
 import { writeViewPanelHandoff } from '../../PanelsAndSectionsLayout/Panel/ViewPanelModal/viewPanelHandoffStore';
@@ -44,10 +48,7 @@ export function useSwitchToViewMode({
 		}
 		params.set(QueryParams.expandedWidgetId, panelId);
 		params.set(QueryParams.graphType, panelType);
-		params.set(
-			QueryParams.compositeQuery,
-			encodeURIComponent(JSON.stringify(query)),
-		);
+		applySerializedParams(serialize(query), params);
 		safeNavigate(
 			`${generatePath(ROUTES.DASHBOARD, { dashboardId })}?${params.toString()}`,
 		);

frontend/src/pages/DashboardPageV2/DashboardContainer/PanelEditor/newPanelRoute.ts

@@ -1,7 +1,7 @@
 import { generatePath } from 'react-router-dom';
-import { QueryParams } from 'constants/query';
 import type { PANEL_TYPES } from 'constants/queryBuilder';
 import ROUTES from 'constants/routes';
+import { serialize } from 'lib/compositeQuery/serializer';
 import type { Query } from 'types/api/queryBuilder/queryBuilderData';
 
 import {
@@ -45,11 +45,8 @@ export function parseNewPanelKind(
 
 /**
  * New-panel editor link that exports an explorer query into a V2 dashboard. Carries the
- * raw `Query` as `compositeQuery` (conversion happens in the editor). `null` when the panel
- * type has no V2 kind, so the caller skips the export instead of landing on an unrelated kind.
- *
- * Double-encoded on purpose: `useGetCompositeQueryParam` decodes twice, so a single encode
- * would let a bare `%`/`+` (e.g. `ILIKE 'Inf%'`) break its second decode and drop the query.
+ * raw `Query` (conversion happens in the editor). `null` when the panel type has no V2
+ * kind, so the caller skips the export instead of landing on an unrelated kind.
  */
 export function buildExportPanelLink({
 	dashboardId,
@@ -68,9 +65,7 @@ export function buildExportPanelLink({
 		dashboardId,
 		panelId: NEW_PANEL_ID,
 	});
-	return `${path}${newPanelSearch(kind)}&${
-		QueryParams.compositeQuery
-	}=${encodeURIComponent(encodeURIComponent(JSON.stringify(query)))}`;
+	return `${path}${newPanelSearch(kind)}&${serialize(query).toString()}`;
 }
 
 /** Target section index for a new panel, or undefined when unset/invalid. */

frontend/src/pages/DashboardPageV2/DashboardContainer/PanelsAndSectionsLayout/Panel/hooks/useViewPanel.ts

@@ -5,6 +5,11 @@ import { QueryParams } from 'constants/query';
 import type { PANEL_TYPES } from 'constants/queryBuilder';
 import { useSafeNavigate } from 'hooks/useSafeNavigate';
 import useUrlQuery from 'hooks/useUrlQuery';
+import {
+	applySerializedParams,
+	clearSerializedParams,
+	serialize,
+} from 'lib/compositeQuery/serializer';
 import { DashboardDetailEvents } from 'pages/DashboardPageV2/constants/events';
 import type { Query } from 'types/api/queryBuilder/queryBuilderData';
 
@@ -47,7 +52,7 @@ export function useViewPanel(): UseViewPanelApi {
 			next.set(QueryParams.expandedWidgetId, panelId);
 			// Drop leftover in-modal query/kind + the editor's handoff so a plain View opens
 			// on the saved panel, not stale state the modal would otherwise hydrate from.
-			next.delete(QueryParams.compositeQuery);
+			clearSerializedParams(next);
 			next.delete(QueryParams.graphType);
 			clearViewPanelHandoff();
 			void logEvent(DashboardDetailEvents.PanelViewed, { panelId });
@@ -63,12 +68,7 @@ export function useViewPanel(): UseViewPanelApi {
 			next.set(QueryParams.graphType, panelType);
 			// A grid drilldown opens on the saved panel, never a stale editor handoff.
 			clearViewPanelHandoff();
-			// Same encoding the query builder uses (see `useGetCompositeQueryParam`): the URL
-			// value is `encodeURIComponent(JSON.stringify(query))`, decoded once on read.
-			next.set(
-				QueryParams.compositeQuery,
-				encodeURIComponent(JSON.stringify(query)),
-			);
+			applySerializedParams(serialize(query), next);
 			safeNavigate(`${pathname}?${next.toString()}`);
 		},
 		[pathname, safeNavigate, urlQuery],
@@ -79,7 +79,7 @@ export function useViewPanel(): UseViewPanelApi {
 		next.delete(QueryParams.expandedWidgetId);
 		// Drop the drilldown editor's URL state so it doesn't leak to the dashboard
 		// (the in-modal query builder writes compositeQuery, V1 parity).
-		next.delete(QueryParams.compositeQuery);
+		clearSerializedParams(next);
 		next.delete(QueryParams.graphType);
 		clearViewPanelHandoff();
 		const search = next.toString();

frontend/src/pages/DashboardPageV2/DashboardContainer/PanelsAndSectionsLayout/Panel/utils/__tests__/buildCreateAlertUrl.test.ts

@@ -3,6 +3,7 @@ import { ENTITY_VERSION_V5 } from 'constants/app';
 import { QueryParams } from 'constants/query';
 import { PANEL_TYPES } from 'constants/queryBuilder';
 import ROUTES from 'constants/routes';
+import { deserialize } from 'lib/compositeQuery/serializer';
 import { fromPerses } from 'pages/DashboardPageV2/DashboardContainer/queryV5/persesQueryAdapters';
 import type { Query } from 'types/api/queryBuilder/queryBuilderData';
 import { EQueryType } from 'types/common/dashboard';
@@ -73,32 +74,25 @@ describe('buildCreateAlertUrl', () => {
 		expect(params.get(QueryParams.source)).toBe('dashboards');
 	});
 
-	it('encodes the translated query as the compositeQuery param', () => {
+	it('serializes the translated query into the URL', () => {
 		const params = parse(buildCreateAlertUrl(makePanel()));
 
-		const raw = params.get(QueryParams.compositeQuery);
-		expect(raw).toBeTruthy();
-		const decoded = JSON.parse(decodeURIComponent(raw as string));
-		expect(decoded.queryType).toBe(EQueryType.QUERY_BUILDER);
-		expect(decoded.id).toBe('q1');
+		const decoded = deserialize(params);
+		expect(decoded).not.toBeNull();
+		expect(decoded?.queryType).toBe(EQueryType.QUERY_BUILDER);
+		expect(decoded?.id).toBe('q1');
 	});
 
 	it('carries the panel formatting unit onto the alert query when set', () => {
 		const params = parse(buildCreateAlertUrl(makePanel({ unit: 'bytes' })));
 
-		const decoded = JSON.parse(
-			decodeURIComponent(params.get(QueryParams.compositeQuery) as string),
-		);
-		expect(decoded.unit).toBe('bytes');
+		expect(deserialize(params)?.unit).toBe('bytes');
 	});
 
 	it('leaves the query unit unset when the panel has no formatting unit', () => {
 		const params = parse(buildCreateAlertUrl(makePanel()));
 
-		const decoded = JSON.parse(
-			decodeURIComponent(params.get(QueryParams.compositeQuery) as string),
-		);
-		expect(decoded.unit).toBeUndefined();
+		expect(deserialize(params)?.unit).toBeUndefined();
 	});
 
 	it('omits the alert-condition params when the panel has no reduceTo or thresholds', () => {

frontend/src/pages/DashboardPageV2/DashboardContainer/PanelsAndSectionsLayout/Panel/utils/buildCreateAlertUrl.ts

@@ -7,6 +7,10 @@ import { ENTITY_VERSION_V5 } from 'constants/app';
 import { QueryParams } from 'constants/query';
 import { PANEL_TYPES } from 'constants/queryBuilder';
 import ROUTES from 'constants/routes';
+import {
+	applySerializedParams,
+	serialize,
+} from 'lib/compositeQuery/serializer';
 import { PANEL_KIND_TO_PANEL_TYPE } from 'pages/DashboardPageV2/DashboardContainer/Panels/types/panelKind';
 import { fromPerses } from 'pages/DashboardPageV2/DashboardContainer/queryV5/persesQueryAdapters';
 import type { Query } from 'types/api/queryBuilder/queryBuilderData';
@@ -44,10 +48,7 @@ export function buildAlertUrl(
 	}
 
 	const params = new URLSearchParams();
-	params.set(
-		QueryParams.compositeQuery,
-		encodeURIComponent(JSON.stringify(query)),
-	);
+	applySerializedParams(serialize(query), params);
 	params.set(QueryParams.panelTypes, panelType);
 	params.set(QueryParams.version, ENTITY_VERSION_V5);
 	params.set(QueryParams.source, YAxisSource.DASHBOARDS);

frontend/src/pages/EditRules/index.tsx

@@ -15,6 +15,7 @@ import EditRulesContainer from 'container/EditRules';
 import { useNotifications } from 'hooks/useNotifications';
 import { useSafeNavigate } from 'hooks/useSafeNavigate';
 import useUrlQuery from 'hooks/useUrlQuery';
+import { clearSerializedParams } from 'lib/compositeQuery/serializer';
 import history from 'lib/history';
 import {
 	NEW_ALERT_SCHEMA_VERSION,
@@ -49,7 +50,7 @@ function EditRules(): JSX.Element {
 	const { notifications } = useNotifications();
 
 	const clickHandler = (): void => {
-		params.delete(QueryParams.compositeQuery);
+		clearSerializedParams(params);
 		params.delete(QueryParams.panelTypes);
 		params.delete(QueryParams.ruleId);
 		params.delete(QueryParams.relativeTime);

frontend/src/pages/TraceDetailsV3/SpanDetailsPanel/SpanDetailsPanel.tsx

@@ -20,6 +20,10 @@ import ROUTES from 'constants/routes';
 import InfraMetrics from 'container/LogDetailedView/InfraMetrics/InfraMetrics';
 import { getEmptyLogsListConfig } from 'container/LogsExplorerList/utils';
 import dayjs from 'dayjs';
+import {
+	applySerializedParams,
+	serialize,
+} from 'lib/compositeQuery/serializer';
 import {
 	TraceDetailEventKeys,
 	TraceDetailEvents,
@@ -240,7 +244,7 @@ function SpanDetailsContent({
 		};
 
 		const searchParams = new URLSearchParams();
-		searchParams.set(QueryParams.compositeQuery, JSON.stringify(compositeQuery));
+		applySerializedParams(serialize(compositeQuery as any), searchParams);
 		searchParams.set(QueryParams.startTime, startTimeMs.toString());
 		searchParams.set(QueryParams.endTime, endTimeMs.toString());
 

frontend/src/pages/TraceDetailsV3/SpanDetailsPanel/SpanLogs/SpanLogs.tsx

@@ -18,6 +18,7 @@ import { LogsLoading } from 'container/LogsLoading/LogsLoading';
 import { FontSize } from 'container/OptionsMenu/types';
 import { getOperatorValue } from 'container/QueryBuilder/filters/QueryBuilderSearch/utils';
 import { useQueryBuilder } from 'hooks/queryBuilder/useQueryBuilder';
+import { serializeToParams } from 'lib/compositeQuery/serializer';
 import createQueryParams from 'lib/createQueryParams';
 import { Compass } from '@signozhq/icons';
 import { ILog } from 'types/api/logs/log';
@@ -138,7 +139,7 @@ function SpanLogs({
 				[QueryParams.activeLogId]: `"${log.id}"`,
 				[QueryParams.startTime]: timeRange.startTime.toString(),
 				[QueryParams.endTime]: timeRange.endTime.toString(),
-				[QueryParams.compositeQuery]: JSON.stringify(updatedQuery),
+				...serializeToParams(updatedQuery),
 			};
 
 			const url = `${ROUTES.LOGS_EXPLORER}?${createQueryParams(queryParams)}`;

frontend/src/periscope/components/CopyButton/CopyButton.tsx

@@ -1,10 +1,10 @@
-import { CSSProperties, useCallback } from 'react';
+import { CSSProperties, type MouseEvent, useCallback } from 'react';
 import { Check, Copy } from '@signozhq/icons';
 import { Button } from '@signozhq/ui/button';
 import cx from 'classnames';
-import { useCopyToClipboard } from 'hooks/useCopyToClipboard';
 
 import styles from './CopyButton.module.scss';
+import { useCopyButton } from './useCopyButton';
 
 export interface CopyButtonProps {
 	/** Text written to the clipboard on click. */
@@ -30,11 +30,15 @@ function CopyButton({
 	className,
 	testId,
 }: CopyButtonProps): JSX.Element {
-	const { copyToClipboard, isCopied } = useCopyToClipboard();
+	const { copyToClipboard, isCopied } = useCopyButton();
 
-	const handleClick = useCallback((): void => {
-		copyToClipboard(value);
-	}, [copyToClipboard, value]);
+	const handleClick = useCallback(
+		(e: MouseEvent<HTMLButtonElement>): void => {
+			e.stopPropagation();
+			copyToClipboard(value);
+		},
+		[copyToClipboard, value],
+	);
 
 	const stackStyle: CSSProperties = { width: size, height: size };
 

frontend/src/periscope/components/CopyButton/__test__/CopyButton.test.tsx

@@ -0,0 +1,65 @@
+import { act, render, screen } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+
+import CopyButton from '../CopyButton';
+
+const mockCopy = jest.fn();
+
+// Exercise the real useCopyButton — stub only react-use's underlying copy so the
+// click doesn't hit copy-to-clipboard's jsdom fallback (window.prompt).
+jest.mock('react-use', () => ({
+	...jest.requireActual('react-use'),
+	useCopyToClipboard: (): [unknown, jest.Mock] => [null, mockCopy],
+}));
+
+describe('CopyButton', () => {
+	let user: ReturnType<typeof userEvent.setup>;
+
+	beforeEach(() => {
+		jest.useFakeTimers();
+		user = userEvent.setup({ advanceTimers: jest.advanceTimersByTime });
+		mockCopy.mockClear();
+	});
+
+	afterEach(() => {
+		jest.runOnlyPendingTimers();
+		jest.useRealTimers();
+	});
+
+	it('copies its value on click', async () => {
+		render(<CopyButton value="hello" testId="copy" />);
+
+		await user.click(screen.getByTestId('copy'));
+
+		expect(mockCopy).toHaveBeenCalledWith('hello');
+	});
+
+	it('does not trigger parent click handlers (stops propagation)', async () => {
+		const onParentClick = jest.fn();
+		render(
+			// oxlint-disable-next-line jsx-a11y/no-static-element-interactions, jsx-a11y/click-events-have-key-events
+			<div onClick={onParentClick}>
+				<CopyButton value="x" testId="copy" />
+			</div>,
+		);
+
+		await user.click(screen.getByTestId('copy'));
+
+		expect(onParentClick).not.toHaveBeenCalled();
+	});
+
+	it('shows the copied state after clicking and reverts after the reset window', async () => {
+		const { container } = render(<CopyButton value="hello" testId="copy" />);
+		const iconStack = container.querySelector('[data-copied]') as HTMLElement;
+
+		expect(iconStack).toHaveAttribute('data-copied', 'false');
+
+		await user.click(screen.getByTestId('copy'));
+		expect(iconStack).toHaveAttribute('data-copied', 'true');
+
+		act(() => {
+			jest.runOnlyPendingTimers();
+		});
+		expect(iconStack).toHaveAttribute('data-copied', 'false');
+	});
+});

frontend/src/periscope/components/CopyButton/constants.ts

@@ -0,0 +1,2 @@
+/** How long (ms) CopyButton stays in the "copied" state before reverting. */
+export const COPIED_RESET_MS = 1000;

frontend/src/periscope/components/CopyButton/useCopyButton.ts

@@ -0,0 +1,44 @@
+import { useCallback, useEffect, useRef, useState } from 'react';
+import { useCopyToClipboard } from 'react-use';
+
+import { COPIED_RESET_MS } from './constants';
+
+export interface UseCopyButtonReturn {
+	copyToClipboard: (text: string) => void;
+	isCopied: boolean;
+}
+
+export function useCopyButton(): UseCopyButtonReturn {
+	const [, copy] = useCopyToClipboard();
+	const [isCopied, setIsCopied] = useState(false);
+	const timeoutRef = useRef<ReturnType<typeof setTimeout> | null>(null);
+
+	useEffect(() => {
+		return (): void => {
+			if (timeoutRef.current) {
+				clearTimeout(timeoutRef.current);
+				timeoutRef.current = null;
+			}
+		};
+	}, []);
+
+	const copyToClipboard = useCallback(
+		(text: string): void => {
+			copy(text);
+			if (timeoutRef.current) {
+				clearTimeout(timeoutRef.current);
+			}
+			setIsCopied(true);
+			timeoutRef.current = setTimeout(() => {
+				setIsCopied(false);
+				timeoutRef.current = null;
+			}, COPIED_RESET_MS);
+		},
+		[copy],
+	);
+
+	return {
+		copyToClipboard,
+		isCopied,
+	};
+}

frontend/src/providers/QueryBuilder.tsx

@@ -38,6 +38,10 @@ import { useGetCompositeQueryParam } from 'hooks/queryBuilder/useGetCompositeQue
 import { updateStepInterval } from 'hooks/queryBuilder/useStepInterval';
 import { useSafeNavigate } from 'hooks/useSafeNavigate';
 import useUrlQuery from 'hooks/useUrlQuery';
+import {
+	applySerializedParams,
+	serialize,
+} from 'lib/compositeQuery/serializer';
 import { createIdFromObjectFields } from 'lib/createIdFromObjectFields';
 import { createNewBuilderItemName } from 'lib/newQueryBuilder/createNewBuilderItemName';
 import { getOperatorsBySourceAndPanelType } from 'lib/newQueryBuilder/getOperatorsBySourceAndPanelType';
@@ -990,10 +994,7 @@ export function QueryBuilderProvider({
 				);
 			}
 
-			urlQuery.set(
-				QueryParams.compositeQuery,
-				encodeURIComponent(JSON.stringify(currentGeneratedQuery)),
-			);
+			applySerializedParams(serialize(currentGeneratedQuery), urlQuery);
 
 			if (searchParams) {
 				Object.keys(searchParams).forEach((param) =>

frontend/src/utils/dashboard/generateExportToDashboardLink.ts

@@ -2,6 +2,7 @@ import { generatePath } from 'react-router-dom';
 import { QueryParams } from 'constants/query';
 import { PANEL_TYPES } from 'constants/queryBuilder';
 import ROUTES from 'constants/routes';
+import { serialize } from 'lib/compositeQuery/serializer';
 import { Query } from 'types/api/queryBuilder/queryBuilderData';
 
 type GenerateExportToDashboardLinkParams = {
@@ -21,6 +22,4 @@ export const generateExportToDashboardLink = ({
 		dashboardId,
 	})}/new?${QueryParams.graphType}=${panelType}&${
 		QueryParams.widgetId
-	}=${widgetId}&${QueryParams.compositeQuery}=${encodeURIComponent(
-		JSON.stringify(query),
-	)}`;
+	}=${widgetId}&${serialize(query).toString()}`;

frontend/src/utils/explorerUtils.ts

@@ -1,6 +1,10 @@
 import { QueryParams } from 'constants/query';
 import { PANEL_TYPES } from 'constants/queryBuilder';
 import ROUTES from 'constants/routes';
+import {
+	applySerializedParams,
+	serialize,
+} from 'lib/compositeQuery/serializer';
 import { ExplorerViews } from 'pages/LogsExplorer/utils';
 import { Query } from 'types/api/queryBuilder/queryBuilderData';
 
@@ -67,10 +71,7 @@ export const getMetricsExplorerUrl = ({
 	endTimeMs,
 }: MetricsExplorerUrlParams): string => {
 	const params = new URLSearchParams();
-	params.set(
-		QueryParams.compositeQuery,
-		encodeURIComponent(JSON.stringify(query)),
-	);
+	applySerializedParams(serialize(query), params);
 
 	if (relativeTime) {
 		params.set(QueryParams.relativeTime, relativeTime);

tests/e2e/helpers/logs-explorer.ts

@@ -0,0 +1,112 @@
+import { expect, type Locator, type Page } from '@playwright/test';
+
+import { dismissQuickFiltersAnnouncement } from './quick-filters';
+
+const LOGS_EXPLORER_PATH = '/logs/logs-explorer';
+
+const RELATIVE_TIME = '6h';
+
+const FORMAT_OPTIONS_TEST_ID = 'periscope-btn-format-options';
+
+const ROW_TEST_ID_PREFIX = 'logs-table-row-';
+
+const LOG_DETAIL_DRAWER_TEST_ID = 'log-detail-drawer';
+export const LINKED_ROW_CLASS = 'logs-linked-row';
+
+type LogsFormat = 'Raw' | 'Default' | 'Column';
+
+const FORMAT_MODES: Record<LogsFormat, string> = {
+	Raw: 'raw',
+	Default: 'list',
+	Column: 'table',
+};
+
+export async function gotoLogsExplorer(page: Page): Promise<void> {
+	await dismissQuickFiltersAnnouncement(page);
+	await page.goto(`${LOGS_EXPLORER_PATH}?relativeTime=${RELATIVE_TIME}`);
+	await expect(page.getByTestId(FORMAT_OPTIONS_TEST_ID)).toBeVisible();
+}
+
+export async function setLogsFormat(
+	page: Page,
+	format: LogsFormat,
+): Promise<void> {
+	const trigger = page.getByTestId(FORMAT_OPTIONS_TEST_ID);
+	const popover = page.locator('.format-options-popover');
+	const appliedMode = new RegExp(`%22format%22%3A%22${FORMAT_MODES[format]}%22`);
+
+	await expect(async () => {
+		if (!(await popover.isVisible())) {
+			await trigger.click();
+			await expect(popover).toBeVisible();
+		}
+		await popover
+			.locator('.menu-items .item')
+			.filter({ hasText: format })
+			.click();
+		await expect(page).toHaveURL(appliedMode, { timeout: 3_000 });
+	}).toPass({ timeout: 20_000 });
+
+	await trigger.click();
+	await expect(popover).toBeHidden();
+}
+
+export function logsTableRows(page: Page): Locator {
+	return page.locator(`[data-testid^="${ROW_TEST_ID_PREFIX}"]`);
+}
+
+export function logsTableRow(page: Page, logId: string): Locator {
+	return page.getByTestId(`${ROW_TEST_ID_PREFIX}${logId}`);
+}
+
+export function highlightedLogsTableRows(page: Page): Locator {
+	return logsTableRows(page).and(page.locator(`.${LINKED_ROW_CLASS}`));
+}
+
+export function unhighlightedLogsTableRows(page: Page): Locator {
+	return page.locator(
+		`[data-testid^="${ROW_TEST_ID_PREFIX}"]:not(.${LINKED_ROW_CLASS})`,
+	);
+}
+
+export function activeLogIdFromUrl(page: Page): string {
+	const value = new URL(page.url()).searchParams.get('activeLogId');
+	if (!value) {
+		throw new Error(`No activeLogId in URL: ${page.url()}`);
+	}
+	return value.replace(/"/g, '');
+}
+
+export function logDetailsDrawer(page: Page): Locator {
+	return page.getByTestId(LOG_DETAIL_DRAWER_TEST_ID);
+}
+
+export async function clickRowFirstCell(row: Locator): Promise<void> {
+	await row.locator('td').first().click();
+}
+
+export async function openLogDetailsFromRow(row: Locator): Promise<void> {
+	await clickRowFirstCell(row);
+	await expect(logDetailsDrawer(row.page())).toBeVisible();
+}
+
+export async function openContextView(page: Page): Promise<void> {
+	await page
+		.locator('.views-tabs')
+		.getByText('Context', { exact: true })
+		.click();
+	await expect(contextLogItems(page).first()).toBeVisible();
+}
+
+function contextLogItems(page: Page): Locator {
+	return page.locator('.context-log-renderer__item');
+}
+
+export async function openFirstContextLogInNewTab(page: Page): Promise<Page> {
+	const [newPage] = await Promise.all([
+		page.context().waitForEvent('page'),
+		contextLogItems(page).first().click(),
+	]);
+	await newPage.waitForLoadState();
+	return newPage;
+}

tests/e2e/tests/logs-explorer/linked-row-click.spec.ts

@@ -0,0 +1,49 @@
+import { expect, test } from '../../fixtures/auth';
+import {
+	activeLogIdFromUrl,
+	clickRowFirstCell,
+	gotoLogsExplorer,
+	highlightedLogsTableRows,
+	LINKED_ROW_CLASS,
+	logDetailsDrawer,
+	logsTableRow,
+	logsTableRows,
+	openFirstContextLogInNewTab,
+	openContextView,
+	openLogDetailsFromRow,
+	setLogsFormat,
+	unhighlightedLogsTableRows,
+} from '../../helpers/logs-explorer';
+
+test.describe('Logs Explorer — linked row in Column format', () => {
+	test('TC-01 the linked row in a newly opened tab is highlighted and toggles the details drawer on click', async ({
+		authedPage: page,
+	}) => {
+		await gotoLogsExplorer(page);
+		await setLogsFormat(page, 'Column');
+
+		const rows = logsTableRows(page);
+		await expect(rows.first()).toBeVisible();
+		await expect(highlightedLogsTableRows(page)).toHaveCount(0);
+
+		await openLogDetailsFromRow(rows.first());
+		await openContextView(page);
+
+		const linkedTab = await openFirstContextLogInNewTab(page);
+		await expect(linkedTab).toHaveURL(/activeLogId=/);
+
+		const linkedLogId = activeLogIdFromUrl(linkedTab);
+		const linkedRow = logsTableRow(linkedTab, linkedLogId);
+		await expect(linkedRow).toBeVisible();
+		await expect(linkedRow).toHaveClass(new RegExp(LINKED_ROW_CLASS));
+
+		await expect(highlightedLogsTableRows(linkedTab)).toHaveCount(1);
+		await expect(unhighlightedLogsTableRows(linkedTab).first()).toBeVisible();
+
+		await expect(logDetailsDrawer(linkedTab)).toBeHidden();
+		await openLogDetailsFromRow(linkedRow);
+
+		await clickRowFirstCell(linkedRow);
+		await expect(logDetailsDrawer(linkedTab)).toBeHidden();
+	});
+});