修复后台漏斗无数据：埋点默认启用、补全 signup_completed 和 dashboard_active 事件上报

frontend/app/api/analytics/events/route.ts

@@ -10,7 +10,7 @@ import {
 
 const API_BASE = process.env.POLYWEATHER_API_BASE_URL;
 const ANALYTICS_ENABLED =
-  process.env.NEXT_PUBLIC_POLYWEATHER_APP_ANALYTICS === "true";
+  process.env.NEXT_PUBLIC_POLYWEATHER_APP_ANALYTICS !== "false";
 
 export async function POST(req: NextRequest) {
   if (!ANALYTICS_ENABLED) {

frontend/components/account/AccountCenter.tsx

@@ -45,7 +45,7 @@ import {
   getCurrentPaymentHost,
   isPaymentHostAllowed,
 } from "@/lib/payment-host";
-import { trackAppEvent } from "@/lib/app-analytics";
+import { markAnalyticsOnce, trackAppEvent } from "@/lib/app-analytics";
 import { useI18n } from "@/hooks/useI18n";
 import { UnlockProOverlay } from "@/components/subscription/UnlockProOverlay";
 
@@ -927,6 +927,23 @@ export function AccountCenter() {
     [currentPaymentHost],
   );
 
+  useEffect(() => {
+    if (!authIsAuthenticated || !authUserId) return;
+    const actorKey = authUserId.toLowerCase();
+    if (markAnalyticsOnce(`signup_completed:${actorKey}`, "local")) {
+      trackAppEvent("signup_completed", {
+        entry: "account_center",
+        user_id: authUserId,
+      });
+    }
+    if (markAnalyticsOnce(`dashboard_active:${actorKey}`, "session")) {
+      trackAppEvent("dashboard_active", {
+        entry: "account_center",
+        user_id: authUserId,
+      });
+    }
+  }, [authIsAuthenticated, authUserId]);
+
   useEffect(() => {
     let canceled = false;
     let timeoutId: number | null = null;

frontend/components/account/__tests__/paymentShell.test.ts

@@ -17,6 +17,14 @@ export function runTests() {
 
   const accountCenterSource = fs.readFileSync(accountCenterPath, "utf8");
   const serviceWorkerSource = fs.readFileSync(serviceWorkerPath, "utf8");
+  const appAnalyticsSource = fs.readFileSync(
+    path.join(projectRoot, "lib", "app-analytics.ts"),
+    "utf8",
+  );
+  const analyticsRouteSource = fs.readFileSync(
+    path.join(projectRoot, "app", "api", "analytics", "events", "route.ts"),
+    "utf8",
+  );
 
   assert(
     accountCenterSource.includes(
@@ -48,4 +56,14 @@ export function runTests() {
       accountCenterSource.includes("只有 USDC 可能无法完成授权或支付"),
     "payment wallet tab must warn users that Polygon POL/MATIC gas is required in addition to USDC",
   );
+  assert(
+    !appAnalyticsSource.includes('NEXT_PUBLIC_POLYWEATHER_APP_ANALYTICS === "true"') &&
+      !analyticsRouteSource.includes('NEXT_PUBLIC_POLYWEATHER_APP_ANALYTICS === "true"'),
+    "app analytics must be enabled by default so ops funnel can collect data without a fragile production env flag",
+  );
+  assert(
+    accountCenterSource.includes('trackAppEvent("signup_completed"') &&
+      accountCenterSource.includes('trackAppEvent("dashboard_active"'),
+    "account center must emit signup_completed and dashboard_active so the ops funnel has top-of-funnel data",
+  );
 }

frontend/lib/app-analytics.ts

@@ -1,7 +1,7 @@
 "use client";
 
 const ANALYTICS_ENABLED =
-  process.env.NEXT_PUBLIC_POLYWEATHER_APP_ANALYTICS === "true";
+  process.env.NEXT_PUBLIC_POLYWEATHER_APP_ANALYTICS !== "false";
 
 type TrackableAnalyticsEvent =
   | "signup_completed"