fix(coach): give no supply span for a GLP-1 medication kept as a record

src/lib/ai/coach/__tests__/glp1-snapshot.test.ts

@@ -158,6 +158,23 @@ describe("buildGlp1SnapshotBlock", () => {
     });
   });
 
+  it("keeps the pen count but no supply span when intake is not tracked (#1033)", async () => {
+    prismaMock.medication.findMany.mockResolvedValue([
+      fakeMedication({
+        trackIntake: false,
+        unitsPerDose: 1,
+        inventoryItems: [{ state: "ACTIVE", unitsTotal: 4, unitsRemaining: 4 }],
+      }),
+    ]);
+    const out = await buildGlp1SnapshotBlock("user-1");
+    expect(out?.medications[0].penInventory).toEqual({
+      pensRemaining: 1,
+      dosesRemaining: 4,
+      weeksOfSupplyApprox: null,
+    });
+    expect(out?.medications[0].nextInjection).toBeNull();
+  });
+
   // W1 — ledger-only accounts (the pre-item delta writer) keep their
   // pen count in the Coach prompt instead of a silent omission.
   it("falls back to the legacy ledger when the medication has zero items", async () => {

src/lib/ai/coach/glp1-snapshot.ts

@@ -385,6 +385,10 @@ export async function buildGlp1SnapshotBlock(
       weeksOfSupplyApprox = Math.round(dosesRemaining / dosesPerWeek);
     }
 
+    // v1.39.1 (#1033) — with intake tracking off no dose consumes the
+    // stock, so a supply span derived from the cadence would be invented.
+    if (isRecordOnly(med)) weeksOfSupplyApprox = null;
+
     const penInventory: PenInventory | null =
       pensRemaining !== null
         ? { pensRemaining, dosesRemaining, weeksOfSupplyApprox }