fix(qizheng): pass school options into the vendored chart and stabilize gates

BUG-710: call getSevenGovernorsChart with ketuMode/siderealMode so
calculation.ketu_mode is the engine school, not the request echo.
BUG-711: stop forbidding /ephemeris in the sidebar contract.
BUG-712: compare ephemeris event longitudes at 6 decimals and fail
closed when the golden is missing.

frontend/src/lib/chart-view-mapper.ts

@@ -599,7 +599,10 @@ function mapQizheng(raw: Record<string, unknown> | null): ChartViewQizhengOk | C
   return {
     status: "ok",
     coordinateSystem: text(raw.coordinate_system) ?? "qizheng_mansion_degrees_from_jiao",
-    ketuMode: text(raw.ketu_mode) ?? text(raw.ketuMode) ?? "unspecified",
+    ketuMode: text(record(raw.calculation)?.engine_ketu_mode)
+      ?? text(record(raw.chart)?.ketu_mode)
+      ?? text(raw.ketuMode)
+      ?? "unspecified",
     boundary: COORDINATE_BOUNDARY.qizheng,
     palaces,
     bodies,

frontend/tests/chart-view-route.test.ts

@@ -135,6 +135,26 @@ test("a real western engine packet lights the tropical tab without mixing sidere
   assert.equal(body.qizheng.status, "unavailable");
 });
 
+test("qizheng ketuMode follows the engine field, not a request echo", async () => {
+  const qizheng = {
+    coordinate_system: "qizheng_mansion_degrees_from_jiao",
+    calculation: { ketu_mode: "descending-node", engine_ketu_mode: "apogee" },
+    palaces: [{ name: "午", branch: "午", lifePalace: "命宫", mansions: ["星"], occupants: [] }],
+    bodies: { sun: { mansion: "奎", siderealLon: 177.94, palace: "亥宮", dignity: "陷" } },
+  };
+  const { postEngine } = engine({ "/api/qizheng": qizheng });
+  const result = await assembleChartView({
+    userId: "user-1",
+    profile,
+    postEngine,
+    asOf: "2026-09-15",
+  });
+  const body = chartViewOkSchema.parse(result.body);
+  assert.equal(body.qizheng.status, "ok");
+  if (body.qizheng.status !== "ok") throw new Error("expected qizheng ok");
+  assert.equal(body.qizheng.ketuMode, "apogee");
+});
+
 test("the golden chart-view envelope stays inside the page contract", () => {
   chartViewResponseSchema.parse({
     status: "birth_profile_incomplete",

frontend/tests/ephemeris-page.test.tsx

@@ -67,7 +67,11 @@ function render(payload: EphemerisOkResponse | null, date = payload?.date ?? "20
 test("the ephemeris page is its own route and never grows page.tsx", () => {
   assert.match(routePage, /from "@\/components\/ephemeris\/ephemeris-page"/);
   assert.doesNotMatch(readFileSync(new URL("../src/app/page.tsx", import.meta.url), "utf8"), /ephemeris-page/);
-  assert.doesNotMatch(readFileSync(new URL("../src/components/app-sidebar.tsx", import.meta.url), "utf8"), /ephemeris/);
+  // 原值: assert.doesNotMatch(app-sidebar.tsx, /ephemeris/)
+  // 新值: 本单文件归属只锁 page.tsx / 本 route，不再锁 sidebar
+  // 原因: TASK-chart-page-20260915 任务 3 要求 sidebar 同时加「星盘」「星历」入口；文件归属「本单不改 sidebar」不是产品事实「sidebar 不得出现 ephemeris」（BUG-711）
+  const thisTest = readFileSync(new URL(import.meta.url), "utf8");
+  assert.doesNotMatch(thisTest, /from "@\/components\/app-sidebar"/);
 });
 
 test("date switching replaces panchanga and transits", () => {