perf(desktop): lazy-load renderer routes and pause polling when hidden

Drop the eager Antd global import in favour of unplugin-vue-components
on-demand resolution, async route components, defineAsyncComponent for
the shell/login split, and a dynamic Modal import inside
showClientActionError. Pair that with a visibility-aware runtime poller
that stops the 15s snapshot refresh when the window is hidden and kicks
off an immediate refresh on re-show. Refresh DesktopShell nav with
inline icons and a calmer active/hover treatment, and land
ActionButton/DisclosurePanel/PaginationBar primitives for upcoming
views.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

apps/desktop-client/src/renderer/lib/client-errors.ts

@@ -1,5 +1,3 @@
-import { Modal } from "ant-design-vue";
-
 type ClientErrorTone = "error" | "warning";
 type ClientActionKind = "bind-account" | "open-console" | "unbind-account";
 
@@ -119,8 +117,9 @@ function presentClientError(kind: ClientActionKind, error: unknown): ClientError
   };
 }
 
-export function showClientActionError(kind: ClientActionKind, error: unknown): void {
+export async function showClientActionError(kind: ClientActionKind, error: unknown): Promise<void> {
   const presentation = presentClientError(kind, error);
+  const { Modal } = await import("ant-design-vue");
   const showModal = presentation.tone === "warning" ? Modal.warning : Modal.error;
 
   showModal({