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/Stat.vue

@@ -0,0 +1,45 @@
+<script setup lang="ts">
+withDefaults(
+  defineProps<{
+    label: string
+    value: string | number
+    delta?: string
+    deltaTone?: 'up' | 'down'
+    hint?: string
+  }>(),
+  { deltaTone: 'up' },
+)
+</script>
+
+<template>
+  <div class="stat">
+    <Eyebrow>{{ label }}</Eyebrow>
+    <div class="value">{{ value }}</div>
+    <div v-if="delta || hint" class="meta">
+      <span v-if="delta" class="delta" :data-tone="deltaTone">{{ delta }}</span>
+      <Mono v-if="hint" dim>{{ hint }}</Mono>
+    </div>
+  </div>
+</template>
+
+<style scoped>
+.stat { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
+.value {
+  font-family: var(--font-display);
+  font-weight: 600;
+  font-size: 26px;
+  letter-spacing: -0.02em;
+  line-height: 1;
+  font-variant-numeric: tabular-nums;
+}
+.meta { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
+.delta {
+  font-family: var(--font-mono);
+  font-size: 11px;
+  font-weight: 600;
+  padding: 2px 6px;
+  border-radius: 4px;
+}
+.delta[data-tone='up']   { background: rgba(31, 138, 91, 0.12); color: var(--ok); }
+.delta[data-tone='down'] { background: rgba(226, 48, 48, 0.12); color: var(--bad); }
+</style>