fix: bind onboarding greeting to profile

frontend/src/app/page.tsx

@@ -46,6 +46,7 @@ import { chatMessageViews, type ChatMessage } from "@/lib/chat-message-view";
 import {
   OnboardingAuthenticationError,
   type OnboardingContent,
+  createStartGreeting,
   isCurrentOnboardingRequest,
   onboardingProfileFingerprint,
   onboardingRequestIdentity,
@@ -118,7 +119,6 @@ type StreamingReply = { sessionId: string; text: string };
 type BirthPlace = { label: string; lat: number; lon: number; tz: number };
 type Account = { user: { id: string; email: string | null }; credits: number; isAdmin: boolean };
 type OnboardingStep = "name" | "birth" | "place" | "rectification";
-type GreetingPeriod = "morning" | "noon" | "afternoon" | "evening" | "late-night";
 type AccountDialog = "profile" | "redeem" | "logout";
 type DailyStarlanguageCard = { trend: string; action: string; caution: string };
 type DailyStarlanguageApiResponse = {
@@ -188,48 +188,6 @@ const dailyStarlanguageCards: DailyStarlanguageCard[] = [
   { trend: "适合观察资源流向：时间、注意力、金钱都算。", action: "检查一个正在消耗你的习惯，并给它设上限。", caution: "不要为了短期安心做长期成本高的选择。" },
 ];
 
-const greetingVariants: Record<GreetingPeriod, Array<(name: string) => string>> = {
-  morning: [
-    (name) => `早上好，${name}。今天最想先看什么？`,
-    (name) => `${name}，早安。今天最该关注哪件事？`,
-    (name) => `早上好，${name}。想从哪个问题开始？`,
-  ],
-  noon: [
-    (name) => `中午好，${name}。现在最想理清哪件事？`,
-    (name) => `${name}，中午好。什么问题最需要方向？`,
-    (name) => `午间好，${name}。事业、关系或选择，想先聊哪个？`,
-  ],
-  afternoon: [
-    (name) => `${name}，下午好。现在最想推进哪件事？`,
-    (name) => `下午好，${name}。今天想先理清什么？`,
-    (name) => `${name}，下午好。事业、关系或选择，想先聊哪个？`,
-  ],
-  evening: [
-    (name) => `晚上好，${name}。今天最挂心的是哪件事？`,
-    (name) => `${name}，晚上好。此刻最想聊哪件事？`,
-    (name) => `晚上好，${name}。把心里的问题告诉我吧。`,
-  ],
-  "late-night": [
-    (name) => `夜深了，${name}。此刻最想问什么？`,
-    (name) => `${name}，还没休息吗？想从哪件事说起？`,
-    (name) => `这么晚还醒着，${name}。直接说说最在意的问题吧。`,
-  ],
-};
-
-function greetingPeriod(hour: number): GreetingPeriod {
-  if (hour >= 5 && hour < 11) return "morning";
-  if (hour >= 11 && hour < 14) return "noon";
-  if (hour >= 14 && hour < 18) return "afternoon";
-  if (hour >= 18 && hour < 23) return "evening";
-  return "late-night";
-}
-
-function createStartGreeting(name: string, now = new Date()) {
-  const displayName = name.trim() || "你好";
-  const variants = greetingVariants[greetingPeriod(now.getHours())];
-  return variants[Math.floor(Math.random() * variants.length)](displayName);
-}
-
 const emptyProfile: Profile = {
   name: "",
   date: "",
@@ -1119,7 +1077,7 @@ export default function Home() {
     const requestIdentity = onboardingRequestIdentity(accountId, onboardingFingerprint);
     if (isCurrentOnboardingRequest(activeOnboardingRequestIdentity.current, requestIdentity)) return;
     activeOnboardingRequestIdentity.current = requestIdentity;
-    const presentation = { name: profile.name, startGreeting };
+    const presentationName = profile.name;
     const controller = new AbortController();
     setOnboarding(null);
     setOnboardingError("");
@@ -1134,7 +1092,7 @@ export default function Home() {
           || !isCurrentOnboardingRequest(activeOnboardingRequestIdentity.current, requestIdentity)) return;
         setOnboarding({
           ...content,
-          greeting: presentation.startGreeting || createStartGreeting(presentation.name),
+          greeting: createStartGreeting(presentationName),
         });
         setOnboardingError("");
       })
@@ -1153,7 +1111,7 @@ export default function Home() {
       }
       controller.abort();
     };
-  }, [accountId, hydrated, onboardingFingerprint, profile.name, profileComplete, startGreeting]);
+  }, [accountId, hydrated, onboardingFingerprint, profile.name, profileComplete]);
 
   useEffect(() => {
     if (!hydrated || !profileComplete || birthTimeDisplayState(profile)) return;

frontend/src/lib/onboarding-client.ts

@@ -1,5 +1,35 @@
 import { z } from "zod";
 
+type GreetingPeriod = "morning" | "noon" | "afternoon" | "evening" | "late-night";
+
+const greetingVariants: Record<GreetingPeriod, readonly ((name: string) => string)[]> = {
+  morning: [
+    (name) => `早上好，${name}。今天最想先看什么？`,
+    (name) => `${name}，早安。今天最该关注哪件事？`,
+    (name) => `早上好，${name}。想从哪个问题开始？`,
+  ],
+  noon: [
+    (name) => `中午好，${name}。现在最想理清哪件事？`,
+    (name) => `${name}，中午好。什么问题最需要方向？`,
+    (name) => `午间好，${name}。事业、关系或选择，想先聊哪个？`,
+  ],
+  afternoon: [
+    (name) => `${name}，下午好。现在最想推进哪件事？`,
+    (name) => `下午好，${name}。今天想先理清什么？`,
+    (name) => `${name}，下午好。事业、关系或选择，想先聊哪个？`,
+  ],
+  evening: [
+    (name) => `晚上好，${name}。今天最挂心的是哪件事？`,
+    (name) => `${name}，晚上好。此刻最想聊哪件事？`,
+    (name) => `晚上好，${name}。把心里的问题告诉我吧。`,
+  ],
+  "late-night": [
+    (name) => `夜深了，${name}。此刻最想问什么？`,
+    (name) => `${name}，还没休息吗？想从哪件事说起？`,
+    (name) => `这么晚还醒着，${name}。直接说说最在意的问题吧。`,
+  ],
+};
+
 const onboardingResponseSchema = z.object({
   greeting: z.string().transform((value) => value.replace(/\s+/g, " ").trim().slice(0, 180)).pipe(z.string().min(8)),
   suggestions: z.tuple([
@@ -56,6 +86,24 @@ export type OnboardingContent = {
   readonly suggestions: readonly OnboardingSuggestion[];
 };
 
+export function createStartGreeting(
+  name: string,
+  now = new Date(),
+  variantSelection = Math.random(),
+): string {
+  const displayName = name.trim() || "你好";
+  const hour = now.getHours();
+  const period: GreetingPeriod = hour >= 5 && hour < 11
+    ? "morning"
+    : hour >= 11 && hour < 14
+      ? "noon"
+      : hour >= 14 && hour < 18
+        ? "afternoon"
+        : hour >= 18 && hour < 23 ? "evening" : "late-night";
+  const variants = greetingVariants[period];
+  return variants[Math.floor(variantSelection * variants.length)](displayName);
+}
+
 export function onboardingProfileFingerprint(profile: OnboardingProfileFingerprintInput): string {
   return JSON.stringify([
     profile.name,

frontend/tests/onboarding-client.test.ts

@@ -3,6 +3,7 @@ import test from "node:test";
 import {
   OnboardingAuthenticationError,
   OnboardingRequestError,
+  createStartGreeting,
   isCurrentOnboardingRequest,
   onboardingProfileFingerprint,
   onboardingRequestIdentity,
@@ -32,11 +33,13 @@ test("rejects a stale completion after a complete profile changes", () => {
   // When: a presentation-affecting profile field changes before that request completes.
   const changedFingerprint = onboardingProfileFingerprint({ ...completeProfile, name: "周宁" });
   const currentIdentity = onboardingRequestIdentity("account-1", changedFingerprint);
+  const committedGreeting = createStartGreeting("周宁", new Date("2026-07-19T08:00:00+08:00"), 0);
 
-  // Then: the new profile has a distinct request identity and the old completion is stale.
+  // Then: the new profile has a distinct identity and its greeting cannot retain the old name.
   assert.notEqual(currentIdentity, firstIdentity);
   assert.equal(isCurrentOnboardingRequest(currentIdentity, firstIdentity), false);
-  assert.equal(isCurrentOnboardingRequest(currentIdentity, currentIdentity), true);
+  assert.match(committedGreeting, /周宁/);
+  assert.doesNotMatch(committedGreeting, /林遥/);
 });
 
 test("returns personalized cache content after a timeout and pending response", async () => {
@@ -285,10 +288,8 @@ test("parent cancellation interrupts a pending-response retry delay", async () =
   const originalFetch = globalThis.fetch;
   const parent = new AbortController();
   let requestCount = 0;
-  let markFetched: (() => void) | null = null;
-  const fetched = new Promise<void>((resolve) => { markFetched = resolve; });
   globalThis.fetch = () => {
-    requestCount += 1; markFetched?.();
+    requestCount += 1;
     return Promise.resolve(Response.json({ ...personalizedOnboarding, source: "pending" }));
   };
 
@@ -297,7 +298,6 @@ test("parent cancellation interrupts a pending-response retry delay", async () =
     const request = requestOnboardingWithRecovery(parent.signal, () => undefined, {
       requestTimeoutMs: 10_000, retryDelayMs: 10_000, maxAttempts: 3,
     });
-    await fetched;
     await new Promise<void>((resolve) => setImmediate(resolve));
     parent.abort(new DOMException("page unmounted", "AbortError"));