feat(report): name the analysed window of each medication effect

The effect is fitted on up to 90 days before a start and 180 after
it, which can lie outside the report period. The PDF notes and the
clinician view now state the fitted window for every effect shown.

src/components/clinician/__tests__/clinician-view.test.tsx

@@ -200,6 +200,43 @@ describe("<ClinicianView>", () => {
       ],
     });
     const leaves = ["MEDICATION_EFFECT", "BLOOD_PRESSURE_SYS"] as const;
+    const est = {
+      estimate: -5,
+      ciLow: -7,
+      ciHigh: -3,
+      standardError: 1,
+      includesZero: false,
+    };
+    const fitted = makeReport({
+      medicationEffects: [
+        {
+          ...report.medicationEffects![0],
+          targets: [
+            {
+              type: "BLOOD_PRESSURE_SYS",
+              effect: {
+                ...report.medicationEffects![0].targets[0].effect,
+                present: true,
+                reason: undefined,
+                levelChange: est,
+                slopeChangePerWeek: est,
+                preSlopePerWeek: est,
+                window: {
+                  from: "2025-10-07",
+                  to: "2026-01-20",
+                  endReason: "today",
+                },
+              },
+            },
+          ],
+        },
+      ],
+    });
+    expect(
+      render(fitted, {
+        selection: selectionFromLeaves([...leaves, "MEDICATION_LIST"]),
+      }),
+    ).toContain("This window can reach beyond the report period.");
     expect(
       render(report, {
         selection: selectionFromLeaves([...leaves, "MEDICATION_LIST"]),

src/components/clinician/activity-effect-sections.tsx

@@ -163,6 +163,14 @@ export function MedicationEffectSection({
                   unit,
                 })}
               </p>
+              {e.window ? (
+                <p className="text-muted-foreground text-xs">
+                  {t("doctorReport.medicationEffect.windowLine", {
+                    from: fmtDay(e.window.from),
+                    to: fmtDay(e.window.to),
+                  })}
+                </p>
+              ) : null}
               <p className="text-muted-foreground text-xs">
                 {t("doctorReport.medicationEffect.days", {
                   before: e.days.before,

src/lib/doctor-report-pdf/__tests__/activity-effect-sections.test.ts

@@ -217,6 +217,11 @@ describe("doctor report v1.44 sections", () => {
     expect(text).toContain("-0.3 mmHg/week");
     expect(text).toContain("84 / 61");
     expect(text).toContain("5 days after the start left out");
+    // The fitted window (Dec to Apr) reaches outside the Feb to May report
+    // period; the report says which days the figures rest on.
+    expect(text).toMatch(
+      /analysed \S+ to \S+, which can reach beyond the report period/,
+    );
     expect(text).toContain("Other drug started on");
     expect(text).toContain("not a proven effect");
     expect(text).not.toContain("carry-over");

src/lib/doctor-report-pdf/activity-effect-sections.ts

@@ -213,7 +213,15 @@ export function buildMedicationEffectSection(
         `${slope.value} ${unit}/${t("doctorReport.medicationEffect.week")}\n(${slope.low} ${t("doctorReport.medicationEffect.to")} ${slope.high})`,
         `${e.days.before} / ${e.days.after}`,
       ]);
-      const extras: string[] = [];
+      // The fitted window reaches up to 90 days before the start and 180
+      // after it, so it can lie partly outside the report period: always
+      // say which days the figures rest on.
+      const extras: string[] = [
+        t("doctorReport.medicationEffect.window", {
+          from: dayLabel(fmtDate, e.window.from),
+          to: dayLabel(fmtDate, e.window.to),
+        }),
+      ];
       if (e.days.excludedLowAdherence > 0) {
         extras.push(
           t("doctorReport.medicationEffect.excludedAdherence", {
@@ -250,9 +258,7 @@ export function buildMedicationEffectSection(
           }),
         );
       }
-      if (extras.length > 0) {
-        notes.push(`${med.medicationName}, ${label}: ${extras.join("; ")}.`);
-      }
+      notes.push(`${med.medicationName}, ${label}: ${extras.join("; ")}.`);
     }
   }
   if (rows.length === 0) return state;