Merge release/v1.42.0 with the day view into v142/t3-timeline

The timeline now opens a day through the shell's day layer (openDay) and reads ?day= with its parser instead of a copy of both; the capture picker's life-event form starts on the picker's defaultDate like the other forms.

src/app/insights/blood-pressure/page.tsx

@@ -174,6 +174,7 @@ export default function InsightsBlutdruckPage() {
         userTimezone={user?.timezone}
         onVisibleStats={onVisibleStats}
         showDataTable
+        dayLinks
       />
 
       {/* v1.12.4 — target card sits between the chart and the assessment on

src/app/insights/bmi/page.tsx

@@ -124,6 +124,7 @@ export default function InsightsBmiPage() {
         compareBaseline={compareBaseline}
         userTimezone={user?.timezone}
         showDataTable
+        dayLinks
       />
 
       <MetricTargetSummary slug="bmi" />

src/app/insights/pulse/page.tsx

@@ -159,6 +159,7 @@ export default function InsightsPulsPage() {
         userTimezone={user?.timezone}
         onVisibleStats={onVisibleStats}
         showDataTable
+        dayLinks
       />
 
       {/* S11 — the intraday "shape of the day" layer: 10-minute mean heart

src/app/insights/weight/page.tsx

@@ -203,6 +203,7 @@ export default function InsightsGewichtPage() {
         valueScale={weightScale}
         onVisibleStats={onVisibleStats}
         showDataTable
+        dayLinks
       />
 
       <MetricTargetSummary slug="weight" />