refactor(portal): partner-mode customer switcher on real tenants

Migrate the partner-mode customer switcher, in-customer banner, sidebar tile and the team invite/teammate panels off the data/customers fixture onto the real /api/partner/tenants list (shared key, gated to partner-staff so the global shell doesn't 403 for other users). Active customer resolves by tenant _id (the key the customers page already passes to partnerMode.enter); partner-identity labels now use the real partner name from useMe. Removes the now-unused customers + CustomerOrg-list fixture export and the dead setCustomer helper. Verified in UI: switcher + enter/exit show real Baslund Test / Baslund Research ApS.

apps/portal/components/partner/TeammatePanel.vue

@@ -4,7 +4,8 @@
 //   • Activity      — last 5 partner actions with timestamps + IPs
 //   • Security      — MFA card, active sessions, API tokens, suspend callout
 
-import { customers } from '~/data/customers'
+const { tenants } = usePartnerTenants()
+const PLAN_LABEL: Record<string, string> = { mvp: 'Starter', pro: 'Business', enterprise: 'Enterprise' }
 
 export interface TeamMember {
   id: string
@@ -59,10 +60,10 @@ const isOwner = computed(() => !!props.member?.isOwner)
 
 const accessText = computed(() => {
   if (!props.member) return ''
-  if (props.member.access === 'all') return `all (${customers.length})`
+  const total = tenants.value?.length ?? 0
+  if (props.member.access === 'all') return `all (${total})`
   if (props.member.access === 'none') return 'no access'
-  // Specific: just say first N customers
-  return `${customers.length - 5} of ${customers.length}`
+  return `${props.member.accessCount ?? 0} of ${total}`
 })
 </script>
 
@@ -131,14 +132,14 @@ const accessText = computed(() => {
           </div>
           <div class="ac-list">
             <div
-              v-for="c in customers.slice(0, member.access === 'all' ? customers.length : 3)"
-              :key="c.id"
+              v-for="c in tenants.slice(0, member.access === 'all' ? tenants.length : 3)"
+              :key="c._id"
               class="ac-row"
             >
               <UiIcon name="check" :size="11" :stroke-width="2.5" />
-              <div class="cust-swatch" :style="{ background: c.brandColor }" />
+              <div class="cust-swatch" :style="{ background: c.brandColor || '#0A0A0A' }" />
               <span class="cust-name">{{ c.name }}</span>
-              <Mono dim>{{ c.planLabel }}</Mono>
+              <Mono dim>{{ PLAN_LABEL[c.plan ?? 'pro'] }}</Mono>
             </div>
           </div>
         </div>