feat(onboarding): no hint toast after the first-chart star convergence

Product 2026-09-29: drop 「这片天空在星盘页可以保存。」. The chart page entry is now replay + share.
Verified: tsc 0, lint 0 errors, npm test 4335/4280/24 (same 24 Docker/DB/deploy names),
quick gate (gate params) passed, / Static, first-screen JS gzip 651,512 -> 651,143.

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

frontend/tests/profile-onboarding-birth-sky-reveal.test.ts

@@ -105,8 +105,10 @@ test("failure: no overlay, no retry, no error surfaced", async () => {
   assert.equal(calls, 2);
   assert.deepEqual(shown, []);
   assert.doesNotMatch(revealHook, /setError|console\.(error|warn)/);
-  // The only toast is the hint in `close`, which runs after the overlay has played.
-  assert.equal(revealHook.match(/toast\(/g)?.length, 1);
+  // 原值：hook 里恰好 1 处 `toast(`（过场结束后的提示）
+  // 新值：0 处
+  // 原因：产品 2026-09-29 去掉过场后的提示句
+  assert.equal(revealHook.match(/toast\(/g)?.length ?? 0, 0);
 });
 
 test("only the reader's own onboarding place save triggers it, after the flow has moved on", () => {
@@ -250,14 +252,14 @@ test("overlay: full screen, no buttons; tap, click or Esc ends it at once; rAF s
   assert.match(revealHook, /import\("@\/components\/birth-sky\/birth-sky-converge"\)/);
 });
 
-test("the hint is the VOICE line, shown once after the overlay ends", () => {
-  assert.match(revealHook, /export const BIRTH_SKY_REVEAL_HINT = "这片天空在星盘页可以保存。";/);
-  assert.match(voice, /这片天空在星盘页可以保存。/);
-  const close = revealHook.slice(revealHook.indexOf("const close"));
-  const body = close.slice(0, close.indexOf("}, []);"));
-  assert.match(body, /if \(!playing\.current\) return;\s*playing\.current = false;/);
-  assert.match(body, /toast\(BIRTH_SKY_REVEAL_HINT\)/);
-  assert.match(revealHook, /from "sonner"/, "reuses the app's Toaster, no new component");
+// 原值（测试名与断言）：the hint is the VOICE line, shown once after the overlay ends——常量「这片天空在星盘页可以保存。」、VOICE 收录、close 里 toast 一次
+// 新值：nothing follows the overlay——无常量、无 sonner 引用、close 只清状态、VOICE 不再收录这句
+// 原因：产品 2026-09-29「把这个提示去掉」（星盘页入口已改为重放 + 分享，原句也不再准确）
+test("nothing follows the overlay: no hint toast after it ends", () => {
+  assert.doesNotMatch(revealHook, /BIRTH_SKY_REVEAL_HINT|这片天空在星盘页可以保存/);
+  assert.doesNotMatch(revealHook, /from "sonner"/);
+  assert.doesNotMatch(voice, /这片天空在星盘页可以保存。/);
+  assert.match(revealHook, /const close = useCallback\(\(\) => setCover\(null\), \[\]\);/);
 });
 
 // 原值（测试名与断言）：the chart page dialog no longer has a reveal variant——读 `birth-sky-dialog.tsx` / `birth-sky.css`，不得有「继续」/ is-reveal