feat(web): G1 骨架屏取代載入中 + S8 完整提交 — Sprint 5R

- G1: PulseSkeleton + CardSkeleton 元件
- 首頁所有 LobsterLoading 替換為 PulseSkeleton/CardSkeleton
- Tab 2/4 載入狀態用 CardSkeleton
- 活躍事件載入用 PulseSkeleton

Sprint 5R Phase 1B+1C 全部完成:
S1(KPI卡片) S2(FlowPipeline OpenClaw) S3(AI提案) S4(環形圖)
S5(時間線) S6(Terminal) S7(待審批) S8(拓撲群組+主機)
S9(AI模型) S10(監控3×2) S11(Tab修復) S12(頁面修復) G1(骨架屏)

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

apps/web/src/app/[locale]/page.tsx

@@ -25,7 +25,7 @@ import { OpenClawPanel } from '@/components/ai/openclaw-panel'
 import { HostGrid, type HostInfo, type HostService } from '@/components/infra/host-grid'
 import { AppLayout } from '@/components/layout'
 import { PageTabs, type TabConfig } from '@/components/layout/page-tabs'
-import { LobsterLoading } from '@/components/shared/lobster-loading'
+import { PulseSkeleton, CardSkeleton } from '@/components/shared/pulse-skeleton'
 import { ServiceTopology } from '@/components/topology'
 import { BarChart3, Flame, Telescope, FlaskConical, Activity, GitBranch } from 'lucide-react'
 import { DispositionMini } from '@/components/shared/disposition-mini'
@@ -56,7 +56,7 @@ function AlertsAndApprovalsTab() {
     }).finally(() => setLoading(false))
   }, [])
 
-  if (loading) return <LobsterLoading />
+  if (loading) return <CardSkeleton lines={4} />
 
   return (
     <div style={{ display: 'flex', gap: 20, padding: '16px 20px', flex: 1, overflow: 'hidden' }}>
@@ -172,7 +172,7 @@ function DispositionTab() {
       .finally(() => setLoading(false))
   }, [])
 
-  if (loading) return <LobsterLoading />
+  if (loading) return <CardSkeleton lines={4} />
 
   const s = data?.summary
   if (!s || s.total === 0) return (
@@ -730,7 +730,7 @@ export default function Home({ params }: { params: { locale: string } }) {
 
               <div style={{ padding: '14px' }}>
                 {isIncidentsLoading ? (
-                  <LobsterLoading size="sm" />
+                  <PulseSkeleton count={3} height={12} />
                 ) : incidentsError ? (
                   <div style={{ padding: 16, fontSize: 13, color: '#cc2200' }}>{incidentsError}</div>
                 ) : (incidents?.length ?? 0) === 0 ? (

apps/web/src/components/shared/pulse-skeleton.tsx

@@ -0,0 +1,50 @@
+'use client'
+
+/**
+ * PulseSkeleton — 脈動骨架屏 (取代「載入中...」文字)
+ * Sprint 5R G1: Gemini 建議 — AI 呼吸感知
+ * @created 2026-04-09 Claude Opus 4.6 Asia/Taipei
+ */
+
+export function PulseSkeleton({ width = '100%', height = 16, borderRadius = 4, count = 1 }: {
+  width?: string | number
+  height?: number
+  borderRadius?: number
+  count?: number
+}) {
+  return (
+    <>
+      <style>{`
+        @keyframes pulse-skeleton {
+          0%, 100% { opacity: 0.4; }
+          50% { opacity: 1; }
+        }
+      `}</style>
+      <div style={{ display: 'flex', flexDirection: 'column', gap: 8 }}>
+        {Array.from({ length: count }).map((_, i) => (
+          <div key={i} style={{
+            width, height, borderRadius,
+            background: '#e8e5dc',
+            animation: 'pulse-skeleton 1.5s ease-in-out infinite',
+            animationDelay: `${i * 0.15}s`,
+          }} />
+        ))}
+      </div>
+    </>
+  )
+}
+
+/** 卡片級骨架屏 — 模擬 .card 結構 */
+export function CardSkeleton({ lines = 3 }: { lines?: number }) {
+  return (
+    <div style={{
+      background: '#fff', border: '0.5px solid #e0ddd4', borderRadius: 10,
+      overflow: 'hidden', padding: 14,
+    }}>
+      <PulseSkeleton width="40%" height={14} borderRadius={4} />
+      <div style={{ marginTop: 12 }}>
+        <PulseSkeleton count={lines} height={12} borderRadius={3} />
+      </div>
+    </div>
+  )
+}