test(cycle): cover cervix signs + secondary-symptom across the wire

Integration coverage for the new fields: a cervix observation round-trips
POST → GET on the day-log route; the cycle-prefs GET defaults
secondarySymptom to MUCUS and a PATCH to CERVIX persists; and the
backup/restore path preserves both the cervix day-log signs and the
profile's secondary-symptom choice.

tests/integration/cycle-import-export.test.ts

@@ -176,6 +176,9 @@ describe("cycle backup — round-trips through build + restore", () => {
         date: "2026-03-02",
         flow: "MEDIUM",
         cycleId: cycle.id,
+        cervixPosition: "HIGH",
+        cervixFirmness: "SOFT",
+        cervixOpening: "OPEN",
         notesEncrypted: "v1:abc123:cipher-envelope",
         source: "MANUAL",
       },
@@ -187,7 +190,12 @@ describe("cycle backup — round-trips through build + restore", () => {
       data: { dayLogId: dayLog.id, symptomId: symptom.id },
     });
     await prisma.cycleProfile.create({
-      data: { userId: USER_ID, goal: "TRYING_TO_CONCEIVE", cycleTrackingEnabled: true },
+      data: {
+        userId: USER_ID,
+        goal: "TRYING_TO_CONCEIVE",
+        cycleTrackingEnabled: true,
+        secondarySymptom: "CERVIX",
+      },
     });
 
     // Build the backup section, then assert it round-trips through the schema.
@@ -217,6 +225,9 @@ describe("cycle backup — round-trips through build + restore", () => {
     });
     expect(restored).toHaveLength(1);
     expect(restored[0].notesEncrypted).toBe("v1:abc123:cipher-envelope");
+    expect(restored[0].cervixPosition).toBe("HIGH");
+    expect(restored[0].cervixFirmness).toBe("SOFT");
+    expect(restored[0].cervixOpening).toBe("OPEN");
     expect(restored[0].cycleId).not.toBeNull();
     expect(restored[0].symptomLinks.map((l) => l.symptom.key)).toEqual([
       "cramps",
@@ -226,5 +237,6 @@ describe("cycle backup — round-trips through build + restore", () => {
       where: { userId: USER_ID },
     });
     expect(profile.goal).toBe("TRYING_TO_CONCEIVE");
+    expect(profile.secondarySymptom).toBe("CERVIX");
   });
 });

tests/integration/cycle-routes.test.ts

@@ -202,6 +202,30 @@ describe("cycle day-logs — single read (GET)", () => {
     const res = await GET(jsonRequest("/api/cycle/day-logs?date=nope", "GET"));
     expect(res.status).toBe(422);
   });
+
+  it("round-trips the cervix observation signs through POST → GET", async () => {
+    await loginAs(FEMALE_USER_ID);
+    const route = await import("@/app/api/cycle/day-logs/route");
+
+    await route.POST(
+      jsonRequest("/api/cycle/day-logs", "POST", {
+        date: "2026-05-02",
+        cervixPosition: "HIGH",
+        cervixFirmness: "SOFT",
+        cervixOpening: "OPEN",
+        loggedAt: "2026-05-02T08:00:00.000Z",
+      }),
+    );
+
+    const hit = await route.GET(
+      jsonRequest("/api/cycle/day-logs?date=2026-05-02", "GET"),
+    );
+    expect(hit.status).toBe(200);
+    const { data } = await hit.json();
+    expect(data.cervixPosition).toBe("HIGH");
+    expect(data.cervixFirmness).toBe("SOFT");
+    expect(data.cervixOpening).toBe("OPEN");
+  });
 });
 
 describe("cycle day-logs — symptom severity", () => {
@@ -488,6 +512,24 @@ describe("cycle-prefs gate flip", () => {
     );
     expect(res.status).toBe(201);
   });
+
+  it("defaults secondarySymptom to MUCUS and persists a switch to CERVIX", async () => {
+    await loginAs(FEMALE_USER_ID);
+    const { GET, PATCH } = await import(
+      "@/app/api/auth/me/cycle-prefs/route"
+    );
+
+    const initial = await GET();
+    expect((await initial.json()).data.secondarySymptom).toBe("MUCUS");
+
+    const patched = await PATCH(
+      jsonRequest("/api/auth/me/cycle-prefs", "PATCH", {
+        secondarySymptom: "CERVIX",
+      }),
+    );
+    expect(patched.status).toBe(200);
+    expect((await patched.json()).data.secondarySymptom).toBe("CERVIX");
+  });
 });
 
 describe("sync/changes — cycle domains", () => {