Optimize landing server rendering

frontend/components/landing/__tests__/landingPricingReferral.test.ts

@@ -11,18 +11,49 @@ export function runTests() {
     path.join(root, "components", "landing", "InstitutionalLandingPage.tsx"),
     "utf8",
   );
+  const authActionsSource = fs.readFileSync(
+    path.join(root, "components", "landing", "LandingAuthActions.tsx"),
+    "utf8",
+  );
+  const analyticsSource = fs.readFileSync(
+    path.join(root, "components", "landing", "LandingAnalytics.tsx"),
+    "utf8",
+  );
+  const localeToggleSource = fs.readFileSync(
+    path.join(root, "components", "landing", "LandingLocaleToggle.tsx"),
+    "utf8",
+  );
   const appPageSource = fs.readFileSync(path.join(root, "app", "page.tsx"), "utf8");
-  const pngPath = path.join(root, "public", "static", "web.png");
+  const publicPngPath = path.join(root, "public", "static", "web.png");
+  const fixturePngPath = path.join(root, "components", "landing", "__tests__", "fixtures", "web.png");
   const webpPath = path.join(root, "public", "static", "web.webp");
 
+  assert(!source.startsWith('"use client"'), "landing body must be a Server Component");
+  assert(!source.includes("@/lib/supabase/client"), "landing body must not import the Supabase browser client");
+  assert(!source.includes("useEffect") && !source.includes("useState"), "landing body must not hydrate static content with React hooks");
+  assert(!source.includes("lucide-react"), "landing body must not import lucide-react for the LCP route");
+  assert(authActionsSource.startsWith('"use client"'), "auth actions must be isolated in a client island");
+  assert(analyticsSource.startsWith('"use client"'), "analytics must be isolated in a client island");
+  assert(localeToggleSource.startsWith('"use client"'), "locale toggle must be isolated in a client island");
+  assert(!authActionsSource.includes('from "@/lib/supabase/client"'), "auth island must not eagerly import the Supabase browser client");
+  assert(
+    authActionsSource.includes("await import(") && authActionsSource.includes('"@/lib/supabase/client"'),
+    "auth island must lazy-load the Supabase browser client after hydration",
+  );
+  assert(!analyticsSource.includes('from "@/lib/app-analytics"'), "analytics island must lazy-load analytics code");
+  assert(!authActionsSource.includes("lucide-react"), "auth island must avoid shipping lucide-react");
+  assert(!localeToggleSource.includes("lucide-react"), "locale island must avoid shipping lucide-react");
+  assert(!analyticsSource.includes("lucide-react"), "analytics island must avoid shipping lucide-react");
   assert(source.includes("3 天免费试用"), "landing page must advertise the 3-day trial");
   assert(source.includes("试用期权益和 Pro 一致，除了不显示付费 Telegram 群链接"), "landing page must state trial access matches Pro except the paid group link");
   assert(!source.includes("高频刷新与 API 仍为 Pro 权益"), "landing page must not incorrectly exclude high-frequency refresh or API from trial access");
   assert(source.includes("bg-[#fbfbfa]"), "landing page must use a light Notion-style background");
   assert(source.includes("WeatherWorkflowIllustration"), "landing page must include a friendly illustration surface");
+  assert(!fs.existsSync(publicPngPath), "heavy PNG preview must not remain in public static assets");
+  assert(fs.existsSync(fixturePngPath), "PNG preview may only remain as a test fixture");
   assert(fs.existsSync(webpPath), "landing page must ship a WebP preview image for the LCP product screenshot");
   assert(
-    fs.statSync(webpPath).size < fs.statSync(pngPath).size * 0.65,
+    fs.statSync(webpPath).size < fs.statSync(fixturePngPath).size * 0.65,
     "WebP preview must be materially smaller than the PNG LCP image",
   );
   assert(source.includes("/static/web.webp"), "landing page must load the lighter WebP product preview image");
@@ -35,10 +66,10 @@ export function runTests() {
     "landing product preview must expose stable intrinsic dimensions and high fetch priority",
   );
   assert(
-    source.includes('trackAppEvent("landing_view"') &&
-      source.includes('trackAppEvent("login_start"') &&
-      source.includes('trackAppEvent("enter_terminal"'),
-    "landing page must emit the top-of-funnel analytics events",
+    analyticsSource.includes('"landing_view"') &&
+      authActionsSource.includes('"login_start"') &&
+      authActionsSource.includes('"enter_terminal"'),
+    "landing client islands must emit the top-of-funnel analytics events",
   );
   assert(source.includes("29.9") && source.includes("30 天"), "landing page must show monthly Pro pricing");
   assert(source.includes("79.9") && source.includes("90 天"), "landing page must show quarterly Pro pricing");
@@ -49,6 +80,7 @@ export function runTests() {
   assert(appPageSource.includes('price: "29.90"'), "JSON-LD must expose monthly Pro pricing");
   assert(appPageSource.includes('price: "79.90"'), "JSON-LD must expose quarterly Pro pricing");
   assert(!appPageSource.includes('price: "10.00"'), "legacy JSON-LD pricing must be removed");
+  assert(!appPageSource.includes("PreloadTerminalData"), "landing route must not add a fourth client island");
 }
 
 function projectRoot() {