feat: portal redesign, pricing catalog, partner-staff invites

- portal: new admin/ and partner/ surfaces with full component library
  (AppLauncher, Avatar, Badge, Card, Modal, Tabs, etc.), composables,
  layouts, partner-routing middleware, and supporting server APIs
- pricing: Price schema/module with operator CRUD, pricing.vue catalog UI,
  Subscription extended with cycle/currency/perSeatAmount/seats snapshots
  for stable MRR aggregation
- partner staff: User.partnerId, invite-partner-user DTO and flow,
  /partners/:slug/users endpoints, InvitePartnerUserModal, shared
  dezky-partner-staff Authentik group
- /me: partner-aware endpoint returning user + partner context so portal
  can route between end-user and partner-admin surfaces
- tenant: seats field for portfolio displays and future MRR calculations
- operator: pricing page, signed-out page, useMe/useToast composables,
  ToastStack

apps/portal/components/Tabs.vue

@@ -0,0 +1,63 @@
+<script setup lang="ts">
+interface TabItem {
+  value: string
+  label: string
+  count?: number
+}
+
+defineProps<{ items: TabItem[]; modelValue: string }>()
+defineEmits<{ 'update:modelValue': [string] }>()
+</script>
+
+<template>
+  <div class="tabs">
+    <button
+      v-for="it in items"
+      :key="it.value"
+      :class="{ active: it.value === modelValue }"
+      @click="$emit('update:modelValue', it.value)"
+    >
+      {{ it.label }}
+      <span v-if="it.count !== undefined" class="count">{{ it.count }}</span>
+    </button>
+  </div>
+</template>
+
+<style scoped>
+.tabs {
+  display: flex;
+  gap: 0;
+  border-bottom: 1px solid var(--border);
+}
+
+button {
+  background: transparent;
+  border: none;
+  padding: 10px 14px;
+  font-size: 13px;
+  font-weight: 500;
+  color: var(--text-mute);
+  border-bottom: 2px solid transparent;
+  margin-bottom: -1px;
+  cursor: pointer;
+  font-family: inherit;
+  display: inline-flex;
+  align-items: center;
+  gap: 6px;
+}
+
+button.active {
+  color: var(--text);
+  font-weight: 600;
+  border-bottom-color: var(--text);
+}
+
+.count {
+  font-family: var(--font-mono);
+  font-size: 11px;
+  background: var(--bg);
+  padding: 1px 6px;
+  border-radius: 3px;
+  color: var(--text-mute);
+}
+</style>