feat(ui): three-page console SPA on @unom/ui + the kit's react helpers

Overview (exporter health, Playnite version, counts, sync, live SSE activity,
and a first-run panel that names the exact ingest path the .pext writes to),
Library (covers + per-game include toggles + why-not-synced), Settings
(filters, art delivery, sync cadence, paths).

Data layer is AtomHttpApi atoms derived from the shared contract; the whole
thing runs with zero host against an in-browser mock transport with four
scenarios, and Storybook renders the real pages on the same fixtures. CI now
asserts the production bundle carries no fixture strings.

Also: CI rebuilt for the workspace layout (one root install, per-package
typecheck, publish from plugin/ on a v* tag) with the exporter job and
`publish: needs [build, exporter]` unchanged; README rewritten around the three
workspaces, with the ingest inbox explained as the load-bearing mechanism it is.

ui/.storybook/main.ts

@@ -0,0 +1,12 @@
+import type { StorybookConfig } from "@storybook/react-vite";
+
+const config: StorybookConfig = {
+	stories: ["../src/**/*.stories.tsx"],
+	addons: [],
+	framework: {
+		name: "@storybook/react-vite",
+		options: {},
+	},
+};
+
+export default config;