fix(blood-pressure): unify in-target window on 90 days across headline, score, and tile

The "BD im Zielbereich" share was narrated on three different windows on the
same screen: the dashboard headline read the trailing 30 days, the dashboard
Health-Score BP pillar read all-time, and the analytics route's pillar read
all-time while its headline read 30 days. A user could see one in-target rate
on the tile and a pillar graded off a different window directly above it.

Standardise the headline, the Health-Score BP pillar input, and the
week-over-week delta on a single trailing-90-day window everywhere — a span
wide enough to stay stable yet recent enough to track current control.
`computeBpInTargetWindows` and the rollup fast-path now both surface a
`last90Days` window; the analytics route and the dashboard snapshot route the
headline and the pillar through it, and both feed the pillar from the identical
value so the dashboard ring and the insights card can never disagree.

Label the window in the tile ("BD-Ziel · 90 T") so the scope is visible; the
30-day figure stays as the short-horizon caption and the all-time aggregate
stays carried for the detail view. Visible-number change is expected: the
headline now reflects the quarter rather than the month.

src/app/api/analytics/route.ts

@@ -242,6 +242,8 @@ async function buildAnalyticsResponse(user: AuthedUser) {
   let bpInTargetPct: number | null = null;
   let bpInTargetPct7d: number | null = null;
   let bpInTargetPct30d: number | null = null;
+  // v1.17 W1d — the canonical 90-day window for the headline / score / coach.
+  let bpInTargetPct90d: number | null = null;
   let bpInTargetPctAllTime: number | null = null;
   /**
    * v1.4.22 W5 reconcile (Code-H2) — period-aligned prior-window
@@ -262,10 +264,11 @@ async function buildAnalyticsResponse(user: AuthedUser) {
    * the resulting `last30Days.pct`.
    */
   let bpInTargetPctPriorWeek: number | null = null;
-  // All-time prior-week BP pct — feeds the Health-Score delta so its BP
-  // pillar compares the same window on both ends (the tile headline keeps
-  // its 30-day scope; the score reads all-time per its documented contract).
-  let windowsPriorWeekAllTime: number | null = null;
+  // v1.17 W1d — prior-week 90-day BP pct. Feeds the Health-Score delta so
+  // its BP pillar compares the same 90-day window on both ends, identical
+  // to the headline scope. (Pre-v1.17 the score read all-time; W1d
+  // unifies headline + score + coach on 90 days.)
+  let windowsPriorWeekForScore: number | null = null;
   // v1.15.12 A1 — graded clinical-proximity BP score (recency-weighted
   // representative reading) for the Health-Score BP pillar value, plus
   // the prior-week run for the week-over-week delta.
@@ -315,20 +318,24 @@ async function buildAnalyticsResponse(user: AuthedUser) {
         userTz,
       }),
     ]);
-    bpInTargetPct = windows.last30Days?.pct ?? null;
+    // v1.17 W1d — the BD-Zielbereich headline standardises on the
+    // trailing-90-day window (labelled "· 90 T" in the tile). All-time
+    // remains carried below for the BP detail page's long view only.
+    bpInTargetPct = windows.last90Days?.pct ?? null;
     bpInTargetPct7d = windows.last7Days?.pct ?? null;
     bpInTargetPct30d = windows.last30Days?.pct ?? null;
+    bpInTargetPct90d = windows.last90Days?.pct ?? null;
     bpInTargetPctAllTime = windows.allTime?.pct ?? null;
     bpInTargetPctPriorMonth = windows.priorMonth?.pct ?? null;
     bpInTargetPctPriorYear = windows.priorYear?.pct ?? null;
-    bpInTargetPctPriorWeek = windowsPriorWeek.last30Days?.pct ?? null;
+    bpInTargetPctPriorWeek = windowsPriorWeek.last90Days?.pct ?? null;
     bpGradedScore = windows.gradedScore;
     bpGradedScorePriorWeek = windowsPriorWeek.gradedScore;
-    // The Health-Score BP pillar reads the all-time window (see the
-    // `bpInTargetPctForScore` derivation below). Capture the prior-week
-    // run's all-time pct too so the week-over-week delta compares the
+    // v1.17 W1d — the Health-Score BP pillar reads the same 90-day window
+    // as the headline (see `bpInTargetPctForScore` below). Capture the
+    // prior-week run's 90-day pct so the week-over-week delta compares the
     // same window on both ends.
-    windowsPriorWeekAllTime = windowsPriorWeek.allTime?.pct ?? null;
+    windowsPriorWeekForScore = windowsPriorWeek.last90Days?.pct ?? null;
   }
 
   // Per-context glucose summaries (canonical mg/dL).
@@ -396,9 +403,14 @@ async function buildAnalyticsResponse(user: AuthedUser) {
   // all-time rate, so route the all-time window through; fall back to the
   // 30-day window only when the all-time window is itself null (it never
   // is when 30-day has data), so a brand-new account is unaffected.
-  const bpInTargetPctForScore = bpInTargetPctAllTime ?? bpInTargetPct;
+  // v1.17 W1d — the Health-Score BP pillar reads the SAME 90-day window as
+  // the BD-Zielbereich tile headline, so the dashboard ring and the
+  // insights card grade the BP pillar off one number. Fall back to the
+  // all-time rate only when the 90-day window is itself null so a
+  // sparse-but-historical account still surfaces a BP pillar.
+  const bpInTargetPctForScore = bpInTargetPct90d ?? bpInTargetPctAllTime;
   const bpInTargetPctPriorWeekForScore =
-    windowsPriorWeekAllTime ?? bpInTargetPctPriorWeek;
+    windowsPriorWeekForScore ?? bpInTargetPctPriorWeek;
   const healthScore = await computeUserHealthScoreFastPath({
     userId: user.id,
     bpInTargetPct: bpInTargetPctForScore,