Hide the command menu button while the mobile side panel is open (#23471)

On mobile the side panel covers the page, but the page header stays
mounted underneath. Its command menu button (`⌘K`, the `⋮` icon) sits at
the same coordinates as the panel's own close button, so the two icons
render on top of each other.

Measured on a 390x844 viewport with the AI chat open:

- `Command Menu` button at `x=346, y=8, 32x32`
- `Close side panel` button at `x=358, y=14, 24x24`

`SidePanelToggleButton` already hid itself for the command menu and
search pages, but the AI chat pages (`AskAI`, `ViewPreviousAiChats`) are
not in `COMMAND_MENU_SIDE_PANEL_PAGES`, so the button stayed and
overlapped.

## Change

Hide the button on mobile whenever the side panel is open, rather than
enumerating pages — the header is not reachable behind a full-screen
panel either way.

Layout customization mode is the exception and keeps it:
`alignWithSidePanelTopBar` deliberately repositions the button into the
side panel top bar there, so that path is preserved.

Desktop is unaffected.

## Testing

Three cases added to `SidePanelToggleButton.test.tsx` (hidden on mobile
with the panel open, kept on mobile in layout customization mode, kept
on desktop with the AI chat open); the `useIsMobile` mock is now
switchable per test. All 10 tests pass.

Verified in the browser at 390x844: with the AI chat open only `Close
side panel` remains in the top bar, and the button reappears once the
panel is closed.


---
_Generated by [Claude
Code](https://claude.ai/code/session_018gcsCQbuTMsyFWv874p25Q)_

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packages/twenty-front/src/modules/workflow/workflow-steps/filters/components/__stories__/WorkflowStepFilterBuilder.stories.tsx

@@ -9,6 +9,7 @@ import { WorkflowStepDecorator } from '~/testing/decorators/WorkflowStepDecorato
 import { WorkspaceDecorator } from '~/testing/decorators/WorkspaceDecorator';
 import { graphqlMocks } from '~/testing/graphqlMocks';
 import { getWorkflowNodeIdMock } from '~/testing/mock-data/workflow';
+import { MemoryRouterDecorator } from '~/testing/decorators/MemoryRouterDecorator';
 
 const meta: Meta<typeof WorkflowStepFilterBuilder> = {
   title: 'Modules/Workflow/Filters/WorkflowStepFilterBuilder',
@@ -26,6 +27,7 @@ const meta: Meta<typeof WorkflowStepFilterBuilder> = {
     onFilterSettingsUpdate: fn(),
   },
   decorators: [
+    MemoryRouterDecorator,
     (Story) => (
       <WorkflowStepBody rowGap={themeCssVariables.spacing[0]}>
         <Story />

packages/twenty-front/src/modules/workflow/workflow-steps/filters/components/__stories__/WorkflowStepFilterColumn.stories.tsx

@@ -12,6 +12,7 @@ import { WorkflowStepActionDrawerDecorator } from '~/testing/decorators/Workflow
 import { WorkflowStepDecorator } from '~/testing/decorators/WorkflowStepDecorator';
 import { WorkspaceDecorator } from '~/testing/decorators/WorkspaceDecorator';
 import { graphqlMocks } from '~/testing/graphqlMocks';
+import { MemoryRouterDecorator } from '~/testing/decorators/MemoryRouterDecorator';
 
 const STEP_FILTER_GROUP: StepFilterGroup = {
   id: 'filter-group-1',
@@ -40,6 +41,7 @@ const meta: Meta<typeof WorkflowStepFilterColumn> = {
     stepFilterIndex: 0,
   },
   decorators: [
+    MemoryRouterDecorator,
     WorkflowStepActionDrawerDecorator,
     WorkflowStepDecorator,
     ComponentDecorator,

packages/twenty-front/src/modules/workflow/workflow-steps/filters/components/__stories__/WorkflowStepFilterValueInput.stories.tsx

@@ -8,6 +8,7 @@ import { WorkflowStepActionDrawerDecorator } from '~/testing/decorators/Workflow
 import { WorkflowStepDecorator } from '~/testing/decorators/WorkflowStepDecorator';
 import { WorkspaceDecorator } from '~/testing/decorators/WorkspaceDecorator';
 import { graphqlMocks } from '~/testing/graphqlMocks';
+import { MemoryRouterDecorator } from '~/testing/decorators/MemoryRouterDecorator';
 
 const TEXT_FILTER: StepFilter = {
   id: 'filter-1',
@@ -39,6 +40,7 @@ const meta: Meta<typeof WorkflowStepFilterValueInput> = {
     stepFilter: TEXT_FILTER,
   },
   decorators: [
+    MemoryRouterDecorator,
     WorkflowStepActionDrawerDecorator,
     WorkflowStepDecorator,
     ComponentDecorator,