fix(seed): give the demo every area of health the score can span

The demo seeds no waist measurement and no wellbeing screener, so two of
the seven pillars have never had data and the score rests on three areas
instead of five. Adiposity and wellbeing render as empty rows on the card
that is meant to show the feature.

Both are seeded now: a fortnightly waist that walks 96 cm down to 88 cm
over the window (0.527 to 0.484 at the demo profile's height, so the
ratio crosses NICE 2022's threshold inside the seeded span rather than
sitting flat green), and six WHO-5 / PHQ-9 / GAD-7 administrations with
their item answers encrypted the way the check-in route writes them, each
with the COMPUTED projection measurement so the history view and the
trend chart agree. Totals sit in the calm bands and item 9 is answered
zero throughout, which also keeps the pillar clear of its
crisis-signposting arm.

Verified against a throwaway Postgres: before, five ok pillars over three
areas; after, seven over five, tier full.

The dates were never the problem. Every timestamp the seed writes is
already relative to the run, and the header says so. What ages is the
seeded DATA — the pillar windows keep moving after a seed, so four weeks
on, activity and sleep fall out of theirs and the score narrows to
whatever cardiometabolic data is still fresh. Since v1.38 that is a
labelled partial score rather than a blank card, but it is still not the
demo at its best, and the header now says that too.

scripts/seed-demo.ts

@@ -8,7 +8,8 @@
  *
  * - 1 admin user (demo/demo123demo123)
  * - 90 days of measurements (weight, BP, pulse, resting HR, body fat,
- *   sleep, steps) — flat-or-improving trends, most-recent point from today
+ *   sleep, steps, fortnightly waist) — flat-or-improving trends,
+ *   most-recent point from today
  * - A full week of per-stage sleep nights (awake/REM/light(core)/deep),
  *   ~7.5 h each, including last night
  * - 90 days of body composition (fat/lean/muscle mass, total body water,
@@ -25,6 +26,8 @@
  * - 3 medications with schedules and ~90 days of intake history at high
  *   compliance, with today scheduled on-track (taken or not-yet-due)
  * - 90 days of mood entries
+ * - Six mental-wellbeing screeners (WHO-5, PHQ-9, GAD-7) spread over the
+ *   window, item answers encrypted the way the check-in route writes them
  * - Vorsorge (preventive-care) reminders — upcoming dental + annual physical
  * - Two lab panels of biomarkers across two dates (quantitative with
  *   reference ranges + qualitative "negativ" rows)
@@ -37,6 +40,18 @@
  * - App settings (registration disabled, English locale)
  *
  * Every date is relative to "now" so the demo stays fresh on every re-seed.
+ * What ages is the SEEDED DATA, not the script: the pillar windows keep
+ * moving after a seed, so about four weeks on, activity (21 of the last
+ * 28 days) and sleep (14 of 28 nights) fall out of their windows and the
+ * Health Score narrows to whatever cardiometabolic data is still fresh.
+ * Since v1.38 that is a labelled partial score rather than a blank card,
+ * but it is still not the demo at its best — re-seed to restore breadth.
+ *
+ * The five areas of health the score can span all have data here on
+ * purpose: cardiometabolic (BP, glucose, lipids), activity (steps),
+ * sleep, adiposity (waist) and wellbeing (screeners). Removing any one
+ * of them does not break the seed; it quietly narrows what the demo's
+ * score can show.
  *
  * Usage: npx tsx scripts/seed-demo.ts
  * Requires DATABASE_URL env var. The Coach sample conversation additionally
@@ -52,6 +67,11 @@ import {
   DEFAULT_DASHBOARD_LAYOUT,
   serializeDashboardLayout,
 } from "../src/lib/dashboard-layout";
+import {
+  INSTRUMENT_MEASUREMENT_TYPE,
+  scoreTotal,
+  severityBand,
+} from "../src/lib/mental-health/instruments";
 import { VALUE_RANGES } from "../src/lib/validations/measurement";
 
 const DATABASE_URL = process.env.DATABASE_URL;
@@ -397,6 +417,88 @@ async function seed() {
          VALUES ($1, $2, 'ACTIVITY_STEPS', $3, 'steps', 'MANUAL', $4, $4, $4)`,
         [cuid(), userId, Math.round(steps[i]), date],
       );
+
+      // Waist circumference (fortnightly, plus today). The Health Score's
+      // adiposity pillar scores waist-to-height against NICE 2022's 0.5,
+      // and it is the ONLY route into that area of health — weight and
+      // body fat feed the trends, never the score. Without a waist row
+      // the demo account has no adiposity standing at all, so the score
+      // rests on three areas instead of five. 96 cm down to 88 cm over
+      // the window is 0.527 → 0.484 at the demo's 182 cm: the ratio
+      // crosses the threshold inside the seeded span, which is what
+      // makes the pillar worth looking at rather than flat green.
+      const daysBack = days - i;
+      if (daysBack % 14 === 0) {
+        const waistCm = 96 - (8 * i) / (span - 1);
+        await client.query(
+          `INSERT INTO measurements (id, user_id, type, value, unit, source, measured_at, created_at, updated_at)
+           VALUES ($1, $2, 'WAIST_CIRCUMFERENCE', $3, 'cm', 'MANUAL', $4, $4, $4)`,
+          [cuid(), userId, Math.round(waistCm * 10) / 10, date],
+        );
+      }
+    }
+
+    // ── Mental-wellbeing screeners ────────────
+    // WHO-5, PHQ-9 and GAD-7 over the same 90-day window. The score's
+    // wellbeing pillar reads the FRESHEST completed screener, so the last
+    // one written decides what that area of health says; the earlier ones
+    // give the history view something to draw. Totals sit in the calm
+    // bands on purpose — a demo is not the place to model a person in
+    // distress, and item 9 is answered zero throughout, which also keeps
+    // the pillar out of its crisis-signposting arm.
+    //
+    // Item answers are encrypted the way the check-in route writes them
+    // (`{ items, schema: 1 }` through the shared Bytes codec), and each
+    // administration gets its COMPUTED projection measurement so the
+    // trend chart and the assessment history agree.
+    console.log("Creating mental-wellbeing screeners...");
+    const screeners: Array<{
+      instrument: "WHO5" | "PHQ9" | "GAD7";
+      items: number[];
+      daysAgo: number;
+    }> = [
+      { instrument: "WHO5", items: [3, 3, 3, 2, 3], daysAgo: 76 },
+      { instrument: "PHQ9", items: [1, 1, 0, 1, 0, 0, 1, 0, 0], daysAgo: 62 },
+      { instrument: "GAD7", items: [1, 1, 0, 1, 0, 0, 0], daysAgo: 48 },
+      { instrument: "WHO5", items: [4, 3, 4, 3, 3], daysAgo: 34 },
+      { instrument: "PHQ9", items: [0, 1, 0, 0, 0, 0, 1, 0, 0], daysAgo: 20 },
+      { instrument: "WHO5", items: [4, 4, 4, 3, 4], daysAgo: 6 },
+    ];
+    for (const screener of screeners) {
+      const total = scoreTotal(screener.instrument, screener.items);
+      const takenAt = daysAgoAt(screener.daysAgo, 20, 15);
+      const assessmentId = cuid();
+      await client.query(
+        `INSERT INTO mental_health_assessments
+           (id, user_id, instrument, locale, version, responses_encrypted, total_score, severity_band,
+            item9_flagged, taken_at, tz, source, created_at, updated_at)
+         VALUES ($1, $2, $3, 'en', 'standard', $4, $5, $6, false, $7, 'Europe/Berlin', 'WEB', $7, $7)`,
+        [
+          assessmentId,
+          userId,
+          screener.instrument,
+          Buffer.from(
+            encryptToBytes(
+              JSON.stringify({ items: screener.items, schema: 1 }),
+            ),
+          ),
+          total,
+          severityBand(screener.instrument, total),
+          takenAt,
+        ],
+      );
+      await client.query(
+        `INSERT INTO measurements (id, user_id, type, value, unit, source, external_id, measured_at, created_at, updated_at)
+         VALUES ($1, $2, $3, $4, 'score', 'COMPUTED', $5, $6, $6, $6)`,
+        [
+          cuid(),
+          userId,
+          INSTRUMENT_MEASUREMENT_TYPE[screener.instrument],
+          total,
+          `assessment:${assessmentId}`,
+          takenAt,
+        ],
+      );
     }
 
     // ── Per-stage sleep nights (last 7 nights, incl. last night) ──
@@ -2122,7 +2224,7 @@ async function seed() {
     console.log("\nDemo data seeded successfully!");
     console.log(`  User: demo / demo123demo123`);
     console.log(
-      `  Measurements: weight, BP, pulse, resting HR, body fat, steps, sleep`,
+      `  Measurements: weight, BP, pulse, resting HR, body fat, steps, sleep, waist`,
     );
     console.log(
       `  Body composition: fat/lean/muscle mass, water, bone, visceral fat, BMI`,
@@ -2147,6 +2249,7 @@ async function seed() {
       `  Workouts: ~3-4/week (running, strength, cycling) with HR samples`,
     );
     console.log(`  Mood: ~${Math.round(span * 0.95)} entries`);
+    console.log(`  Wellbeing screeners: 6 (WHO-5, PHQ-9, GAD-7)`);
     console.log(`  Vorsorge reminders: 2 (dental, annual physical)`);
     console.log(
       `  Lab panels: ${labResults.length} rows across 2 panels (incl. ${recentQual.length} qualitative)`,