fix(ui): defensive optional chains across summaries/medications/preferences/entries/measurements

Same anti-pattern as the v1.4.2 hotfix on /dashboard and /insights —
the optional chain protected only the outer object, so any field on
the inner object that didn't exist threw at access time. Marc's
reports flagged dashboard, insights, medications,
notification-preferences, admin login overview, mood list, and
measurement list. Applied 'data?.X?.Y' to every spot the regex
caught.

src/app/insights/page.tsx

@@ -633,10 +633,10 @@ export default function InsightsPage() {
     staleTime: 60 * 1000,
   });
   const w = analytics?.summaries?.WEIGHT;
-  const sys = analytics?.summaries.BLOOD_PRESSURE_SYS;
-  const dia = analytics?.summaries.BLOOD_PRESSURE_DIA;
-  const p = analytics?.summaries.PULSE;
-  const bf = analytics?.summaries.BODY_FAT;
+  const sys = analytics?.summaries?.BLOOD_PRESSURE_SYS;
+  const dia = analytics?.summaries?.BLOOD_PRESSURE_DIA;
+  const p = analytics?.summaries?.PULSE;
+  const bf = analytics?.summaries?.BODY_FAT;
   const showBodyFatCard = (bf?.count ?? 0) > 0;
   const moodSummary = data?.moodSummary;
   const showMoodCard = (moodSummary?.count ?? 0) > 0;
@@ -710,7 +710,7 @@ export default function InsightsPage() {
     classifyRangeValue(bmiAvg30, bmiRange),
   ]);
   const bpMedications =
-    data?.medications.filter(
+    data?.medications?.filter(
       (medication) => medication.category === "BLOOD_PRESSURE",
     ) ?? [];
   const bpMedicationCompliance30 =

src/app/notifications/page.tsx

@@ -112,7 +112,7 @@ export default function NotificationsPage() {
   });
 
   function isEnabled(channelId: string, eventType: string): boolean {
-    const pref = data?.preferences.find(
+    const pref = data?.preferences?.find(
       (p) => p.channelId === channelId && p.eventType === eventType,
     );
     // Opt-out model: default is ON when no preference row exists

src/app/page.tsx

@@ -198,12 +198,12 @@ export default function DashboardPage() {
   });
 
   const w = data?.summaries?.WEIGHT;
-  const sys = data?.summaries.BLOOD_PRESSURE_SYS;
-  const dia = data?.summaries.BLOOD_PRESSURE_DIA;
-  const p = data?.summaries.PULSE;
-  const bf = data?.summaries.BODY_FAT;
-  const sleepSummary = data?.summaries.SLEEP_DURATION;
-  const stepsSummary = data?.summaries.ACTIVITY_STEPS;
+  const sys = data?.summaries?.BLOOD_PRESSURE_SYS;
+  const dia = data?.summaries?.BLOOD_PRESSURE_DIA;
+  const p = data?.summaries?.PULSE;
+  const bf = data?.summaries?.BODY_FAT;
+  const sleepSummary = data?.summaries?.SLEEP_DURATION;
+  const stepsSummary = data?.summaries?.ACTIVITY_STEPS;
   const moodSummary = moodData?.summary;
 
   // Resolve full dashboard layout — controls visibility + order of every widget

src/components/admin/login-overview-section.tsx

@@ -45,7 +45,7 @@ export function LoginOverviewSection({ id }: { id: string }) {
 
   const entries =
     filter === "failed"
-      ? data?.entries.filter((e) => e.action === "auth.login.failed")
+      ? data?.entries?.filter((e) => e.action === "auth.login.failed")
       : data?.entries;
 
   return (

src/components/measurements/measurement-list.tsx

@@ -300,7 +300,7 @@ export function MeasurementList({ onEdit }: MeasurementListProps) {
           <div className="flex h-32 items-center justify-center">
             <Loader2 className="text-primary h-6 w-6 animate-spin" />
           </div>
-        ) : !data?.measurements.length ? (
+        ) : !data?.measurements?.length ? (
           <div className="text-muted-foreground flex h-32 items-center justify-center rounded-lg border border-dashed">
             {t("measurements.noMeasurements")}
           </div>

src/components/mood/mood-list.tsx

@@ -296,7 +296,7 @@ export function MoodList() {
           <div className="flex h-32 items-center justify-center">
             <Loader2 className="text-primary h-6 w-6 animate-spin" />
           </div>
-        ) : !data?.entries.length ? (
+        ) : !data?.entries?.length ? (
           <div className="text-muted-foreground flex h-32 items-center justify-center rounded-lg border border-dashed">
             {t("mood.noEntries")}
           </div>