fix(ui): 修復事件卡片溢出框 + 基礎架構資料欄位錯誤對應

- incident-card: AI提案按鈕 width 100% + margin 造成右側懸浮框，改為 calc(100%-20px)
- page.tsx: useHosts() 返回 Host[] 但直接傳入 HostGrid 期望的 HostInfo[]，
  補上 mapper (name→hostname, metrics.cpu_percent→cpuPct, service.status→healthy)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/web/src/components/incident/incident-card.tsx

@@ -334,7 +334,7 @@ export function IncidentCard({ incident, decision, onApprovalChange }: IncidentC
               gap: 5,
               fontSize: 13,
               color: '#87867f',
-              width: '100%',
+              width: 'calc(100% - 20px)',
               textAlign: 'left' as const,
               fontFamily: 'inherit',
             }}