chore(ui): drop unused dashboard KPIs + soften membership wording

Remove the "Total Clients / Active Interests / Pipeline Value /
Occupancy Rate" KPI grid from the dashboard — duplicated by the
charts below and rarely scanned. Pipeline funnel, occupancy timeline,
revenue breakdown, lead source charts and the activity feed remain.

Rename the company-members dropdown action "End Membership" →
"Remove from company" — matches how reps describe the action.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/dashboard/dashboard-shell.tsx

@@ -5,7 +5,6 @@ import { useState } from 'react';
 import { useRealtimeInvalidation } from '@/hooks/use-realtime-invalidation';
 import { usePortContext } from '@/providers/port-provider';
 import { PageHeader } from '@/components/shared/page-header';
-import { KpiCardsWithBoundary } from './kpi-cards';
 import { ActivityFeed } from './activity-feed';
 import { DateRangePicker } from './date-range-picker';
 import { PipelineFunnelChart } from './pipeline-funnel-chart';
@@ -75,10 +74,6 @@ export function DashboardShell() {
         actions={<DateRangePicker value={range} onChange={setRange} />}
       />
 
-      <div className="grid gap-3 grid-cols-2 sm:gap-4 lg:grid-cols-4">
-        <KpiCardsWithBoundary />
-      </div>
-
       {/* `items-start` is critical: without it, the right-column aside is
           stretched to match the chart column's row height, which forces
           MyRemindersRail (or any other child with `h-full`) to push later