chore(apps): remove unused code and packages (DEAD-01, DEAD-02, DEAD-03)

Owner approved the deletions. Found by walking imports from each app's
main.ts; sw.ts stays (the PWA plugin's entry).
- user-app: 8 unreachable components, loadingStore.
- user-app-v2: 11 unreachable components, loadingStore.
- both: the unused validators and price helpers, and the gsap and
  @ant-design/icons-vue packages.
- the stray root user-app-v2/ folder (an old package.json and
  vite.config.ts that nothing referenced).
Both apps type-check clean.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/user-app/src/components/product/Category.vue

@@ -1,45 +0,0 @@
-<!--
-  Ported from legacy henza_pwa/src/components/product/category.vue.
-  Not yet wired to real data: the new API has no categories-with-icon endpoint
-  (Prisma has a Category model, but no controller/route exposes it, and there
-  are no per-category icon images). HomeView passes an empty list for now, so
-  this renders nothing rather than fabricated placeholder tiles — see the
-  "existing issue found" note in the report about the legacy `id === 45`
-  special-case, preserved here for whenever real category data exists.
--->
-<template>
-  <router-link :to="{ name: 'search' }" @click="setCats" class="cursor-pointer h-full block">
-    <div
-      class="h-full w-full text-center flex flex-col items-center justify-between rounded-[4px]"
-      :class="value.id === '45' ? 'bg-primary' : 'border border-1 border-secondary'"
-    >
-      <div class="flex justify-center mt-4 shrink-0">
-        <img v-lazy="value.icon?.image" alt="category" class="w-[32px] h-[32px] text-center" />
-      </div>
-
-      <div
-        class="mb-4 mt-4 py-1 px-1 font-semibold flex-1 flex items-center justify-center text-center min-h-[40px]"
-        :class="value.id === '45' ? 'text-white' : 'text-primary'"
-      >
-        {{ value.title }}
-      </div>
-    </div>
-  </router-link>
-</template>
-
-<script setup lang="ts">
-import { useFiltersStore } from '../../stores/filtersStore'
-
-interface CategoryValue {
-  id: string
-  title: string
-  icon?: { image: string }
-}
-
-const props = withDefaults(defineProps<{ value: CategoryValue }>(), {})
-const filters = useFiltersStore()
-
-const setCats = () => {
-  filters.query.cats = [props.value.id]
-}
-</script>