fix(browser): complete preload fixtures and scrollbar bindings

packages/client/ui-directory-picker-native/tests/client-flow.client.spec.tsx

@@ -14,10 +14,10 @@ const desktopIpc = await vi.hoisted(async () => {
   const path = await import('node:path')
   // Electron belongs to the Desktop app; resolve its mock from that workspace.
   const electron = createRequire(path.resolve(import.meta.dirname, '../../../../apps/desktop/package.json')).resolve('electron')
-  return { invoke: vi.fn(), electron }
+  return { invoke: vi.fn(), on: vi.fn(), electron }
 })
 vi.mock(desktopIpc.electron, () => ({
-  ipcRenderer: { invoke: desktopIpc.invoke },
+  ipcRenderer: { invoke: desktopIpc.invoke, on: desktopIpc.on },
   contextBridge: { exposeInMainWorld: (name: string, value: unknown) => { vi.stubGlobal(name, value) } },
 }))
 vi.mock('../../../../apps/desktop/src/preload-platform.ts', () => ({ markDocumentPlatform: vi.fn(), syncWindowFullscreen: vi.fn() }))
@@ -25,7 +25,7 @@ vi.mock('../../../../apps/desktop/src/preload-theme.ts', () => ({ syncNativeThem
 vi.mock('../../../../apps/desktop/src/preload-windows.ts', () => ({ syncWindowsAppearance: vi.fn() }))
 vi.mock('../../../../apps/desktop/src/preload-mandatory-overlay.ts', () => ({ installMandatoryUpdateOverlay: vi.fn() }))
 
-afterEach(() => { cleanup(); vi.unstubAllGlobals(); vi.restoreAllMocks(); desktopIpc.invoke.mockReset() })
+afterEach(() => { cleanup(); vi.unstubAllGlobals(); vi.restoreAllMocks(); desktopIpc.invoke.mockReset(); desktopIpc.on.mockReset() })
 
 const HOLES = ['conversation.hero.workspace.directoryFlow', 'sidebar.workspaces.directoryFlow'] as const
 

packages/client/ui-sidebar-browser/src/client/view/Browser.module.css

@@ -81,6 +81,9 @@
 }
 
 .addressUnknown {
+  --dsh-scrollbar-thumb: var(--dsw-alias-scrollbar-bg-l2);
+  --dsh-scrollbar-thumb-hover: var(--dsw-alias-scrollbar-hover-l2);
+
   color: var(--dsw-alias-label-tertiary);
   background: var(--dsw-alias-bg-layer-2);
 }