feat(home): warm older-sister greeting voice; daily line says why, plainly

Late night no longer remarks on being awake (产品 2026-10-01); every daypart,
weekday and returning line reworded in the same caring voice. Daily line:
each house sentence names where the Moon is in plain words, then one concrete
sentence; no stacked hedges. Sign-fallback moods rewritten the same way.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01N4f2nya58RoRu4yEmJgRGE

frontend/tests/onboarding-presentation.test.ts

@@ -30,7 +30,8 @@ test("terminal and fallback greetings follow the current profile name", () => {
     assert.match(greeting, /周宁/);
     assert.doesNotMatch(greeting, /林遥/);
   }
-  assert.equal(terminalGreeting, "早上好，周宁");
+  // 原值 "早上好，周宁" / 新值 "早安，周宁" / 原因：开场语改知心姐姐口吻（产品 2026-10-01）。
+  assert.equal(terminalGreeting, "早安，周宁");
   assert.equal(fallbackGreeting, "欢迎，周宁");
 });
 
@@ -41,36 +42,46 @@ test("the starter greeting is one line drawn from daypart, weekday and returning
   // 原因：产品把开场语改成 claude.ai 式的单行问候，追问句移到输入框占位符，
   //   「招呼语 + 问句」两半这个形状本身被取消，问句池不再存在。
   const noon = WEDNESDAY(12);
-  assert.equal(createStartGreetingParts("周宁", noon, 0).text, "中午好");
-  assert.equal(createStartGreetingParts("周宁", noon, 0.5).text, "中午好，周宁");
+  // 原值 "中午好" / "中午好，周宁" / 新值 "中午好，记得吃饭" / "午安，周宁"
+  // / 原因：开场语改知心姐姐口吻（产品 2026-10-01）；下标与池长不变。
+  assert.equal(createStartGreetingParts("周宁", noon, 0).text, "中午好，记得吃饭");
+  assert.equal(createStartGreetingParts("周宁", noon, 0.5).text, "午安，周宁");
   assert.equal(createStartGreeting("周宁", noon, 0.5), createStartGreetingParts("周宁", noon, 0.5).text);
 
   // 边界不越界：1 与 0.999999 都落在池内最后一条。
-  assert.equal(createStartGreetingParts("周宁", noon, 1).text, "中午好，周宁");
-  assert.equal(createStartGreetingParts("周宁", noon, 0.999999).text, "中午好，周宁");
+  assert.equal(createStartGreetingParts("周宁", noon, 1).text, "午安，周宁");
+  assert.equal(createStartGreetingParts("周宁", noon, 0.999999).text, "午安，周宁");
 });
 
-test("late night has its own three lines and none of them asks a follow-up", () => {
+test("late night has its own three lines and none of them remarks on being awake", () => {
+  // 原值 "夜猫子，晚上好" / "还没睡呀，周宁" / "晚安前再聊一会"
+  // / 新值 "这会儿很安静" / "夜里好，周宁" / "慢慢说，周宁"
+  // / 原因：产品 2026-10-01「夜猫子、还不睡，用户会觉得你管别人睡不睡」；断言加严：深夜池任何一条都不得提睡觉。
   const lateNight = WEDNESDAY(2);
-  assert.equal(createStartGreetingParts("周宁", lateNight, 0).text, "夜猫子，晚上好");
-  assert.equal(createStartGreetingParts("周宁", lateNight, 1 / 3).text, "还没睡呀，周宁");
-  assert.equal(createStartGreetingParts("周宁", lateNight, 0.7).text, "晚安前再聊一会");
+  assert.equal(createStartGreetingParts("周宁", lateNight, 0).text, "这会儿很安静");
+  assert.equal(createStartGreetingParts("周宁", lateNight, 1 / 3).text, "夜里好，周宁");
+  assert.equal(createStartGreetingParts("周宁", lateNight, 0.7).text, "慢慢说，周宁");
   // 23 点与 4 点同属深夜。
-  assert.equal(createStartGreetingParts("周宁", WEDNESDAY(23), 1 / 3).text, "还没睡呀，周宁");
-  assert.equal(createStartGreetingParts("周宁", WEDNESDAY(4), 1 / 3).text, "还没睡呀，周宁");
+  assert.equal(createStartGreetingParts("周宁", WEDNESDAY(23), 1 / 3).text, "夜里好，周宁");
+  assert.equal(createStartGreetingParts("周宁", WEDNESDAY(4), 1 / 3).text, "夜里好，周宁");
+  for (let step = 0; step < 100; step += 1) {
+    assert.doesNotMatch(createStartGreetingParts("周宁", lateNight, step / 100).text, /睡|夜猫子|晚安/);
+  }
 });
 
 test("a blank name leaves only the lines that carry no name", () => {
   const lateNight = WEDNESDAY(2);
-  assert.equal(createStartGreetingParts("", lateNight, 0).text, "夜猫子，晚上好");
-  assert.equal(createStartGreetingParts("   ", lateNight, 0.9).text, "晚安前再聊一会");
+  // 原值 "夜猫子，晚上好" / "晚安前再聊一会" / 新值 "这会儿很安静"（深夜池唯一不带称呼的一条）
+  // / 原因：深夜池换句（产品 2026-10-01）。
+  assert.equal(createStartGreetingParts("", lateNight, 0).text, "这会儿很安静");
+  assert.equal(createStartGreetingParts("   ", lateNight, 0.9).text, "这会儿很安静");
 
-  // 周一的星期条目带称呼，名字为空时整条不可达；回访池同理。
+  // 原值：断言名字为空时不出现「周一了」/ 新值：只断言带称呼的回访条目不可达
+  // / 原因：周一条目改成不带称呼的「周一了，别太累」，名字为空也该出现；带称呼条目不可达的断言保留。
   for (let step = 0; step < 100; step += 1) {
     for (const hasSessions of [false, true]) {
       const text = createStartGreetingParts("", MONDAY(9), step / 100, hasSessions).text;
-      assert.doesNotMatch(text, /周一了/);
-      assert.doesNotMatch(text, /又见面了|嗨，|最近还好吗/);
+      assert.doesNotMatch(text, /又见面了|你来啦|最近还好吗/);
       assert.ok(text.length > 0);
       assert.doesNotMatch(text, /\{名字\}/);
       assert.doesNotMatch(text, /，$|^，/);
@@ -82,22 +93,24 @@ test("the weekday pool only opens on its own day", () => {
   const friday = FRIDAY(9);
   const fridayLines = new Set(Array.from({ length: 100 }, (_, step) =>
     createStartGreetingParts("周宁", friday, step / 100).text));
-  assert.ok(fridayLines.has("周五快乐"));
+  // 原值 "周五快乐" / "周一了，周宁" / 新值 "周五了，松口气" / "周一了，别太累" / 原因：知心姐姐口吻（产品 2026-10-01）。
+  assert.ok(fridayLines.has("周五了，松口气"));
 
   const wednesdayLines = new Set(Array.from({ length: 100 }, (_, step) =>
     createStartGreetingParts("周宁", WEDNESDAY(9), step / 100).text));
-  assert.ok(!wednesdayLines.has("周五快乐"));
+  assert.ok(!wednesdayLines.has("周五了，松口气"));
   assert.equal(wednesdayLines.size, 3);
 
   assert.ok(new Set(Array.from({ length: 100 }, (_, step) =>
-    createStartGreetingParts("周宁", MONDAY(9), step / 100).text)).has("周一了，周宁"));
+    createStartGreetingParts("周宁", MONDAY(9), step / 100).text)).has("周一了，别太累"));
   assert.ok(new Set(Array.from({ length: 100 }, (_, step) =>
     createStartGreetingParts("周宁", SUNDAY(9), step / 100).text)).has("周日，慢一点"));
 });
 
 test("the returning pool needs at least one session behind the account", () => {
   const evening = WEDNESDAY(20);
-  const returning = ["又见面了，周宁", "欢迎回来", "嗨，周宁", "最近还好吗，周宁？"];
+  // 原值 "嗨，周宁" / 新值 "你来啦，周宁" / 原因：知心姐姐口吻（产品 2026-10-01）；池长不变。
+  const returning = ["又见面了，周宁", "你来啦，周宁", "欢迎回来", "最近还好吗，周宁？"];
 
   const firstVisit = new Set(Array.from({ length: 100 }, (_, step) =>
     createStartGreetingParts("周宁", evening, step / 100, false).text));