R29-1 R29-6: 重构海音达工作台壳层与高频页面

client/src/components/shell/AppBrand.tsx

@@ -0,0 +1,13 @@
+export function AppBrand({ compact = false }: { compact?: boolean }) {
+  return (
+    <div className="flex items-center gap-3">
+      <div className={`flex items-center justify-center rounded-2xl bg-[var(--color-accent-primary)] font-bold text-white shadow-sm ${compact ? "size-9 text-base" : "size-11 text-lg"}`}>
+        H
+      </div>
+      <div>
+        <div className="text-sm font-semibold tracking-tight text-zinc-900">海音达工作台</div>
+        <div className="text-xs text-zinc-500">企业微信入口 + 工作台主平台</div>
+      </div>
+    </div>
+  );
+}