chore: add Storybook 10 setup with PrimeVue + Tailwind integration

Installs Storybook 10.4 in apps/app/ as a component-development and
autodoc tool. Configures viteFinal with all seven SPA aliases so
stories resolve imports identically to the dev/build pipeline.
preview.ts reuses @/plugins/primevue's installPrimeVue() so Storybook
stays in lock-step with main.ts whenever the PrimeVue config changes.

Only the addons we need are wired: addon-docs (autodocs) and
addon-a11y (axe-core checks). addon-interactions is intentionally
omitted — interaction testing stays in Playwright CT per the testing
architecture.

Seed stories: PrimeVue Button (Primary/Secondary/Danger), Tailwind
utility box, and FormField (Default/WithError/Disabled) wrapped in
@primevue/forms Form + Zod resolver.

Adds make storybook target alongside make app / make docs.

apps/app/src/stories/PrimeVueSmoke.stories.ts

@@ -0,0 +1,37 @@
+import type { Meta, StoryObj } from '@storybook/vue3-vite'
+import Button from 'primevue/button'
+
+const meta: Meta = {
+  title: 'Smoke/PrimeVue Button',
+  tags: ['autodocs'],
+  render: (args) => ({
+    components: { Button },
+    setup() {
+      return { args }
+    },
+    template: '<Button v-bind="args" />',
+  }),
+}
+
+export default meta
+type Story = StoryObj
+
+export const Primary: Story = {
+  args: {
+    label: 'Primary',
+  },
+}
+
+export const Secondary: Story = {
+  args: {
+    label: 'Secondary',
+    severity: 'secondary',
+  },
+}
+
+export const Danger: Story = {
+  args: {
+    label: 'Danger',
+    severity: 'danger',
+  },
+}

apps/app/src/stories/TailwindSmoke.stories.ts

@@ -0,0 +1,18 @@
+import type { Meta, StoryObj } from '@storybook/vue3-vite'
+
+const meta: Meta = {
+  title: 'Smoke/Tailwind',
+  tags: ['autodocs'],
+  render: () => ({
+    template: `
+      <div class="flex gap-4 p-6 bg-primary-50 rounded-xl">
+        <span class="text-primary-700 font-semibold">Tailwind v4 utility classes render</span>
+      </div>
+    `,
+  }),
+}
+
+export default meta
+type Story = StoryObj
+
+export const Default: Story = {}