fix(insights): convert weight and temperature in the mood/cycle crosstabs and the plateau note

Route the weight and temperature displays in the mood-factor and cycle-phase
crosstabs and the GLP-1 plateau note through the unit transform: absolute phase
averages take the affine conversion, deltas stay factor-only, and the unit
symbol follows the preference. Thread a unit token into the plateau evidence
copy across the six locales so the sentence reads in the user's unit.

messages/de.json

@@ -1885,7 +1885,7 @@
       "levelShift": "Um {date} wurde eine Verschiebung des Niveaus erkannt.",
       "plateau": {
         "title": "Gewichts-Plateau auf aktueller Dosis",
-        "evidence": "Gewichtsveränderung von {delta} kg in den letzten {window} Tagen ({readings} Messungen) — seit {days} Tagen auf {dose}."
+        "evidence": "Gewichtsveränderung von {delta} {unit} in den letzten {window} Tagen ({readings} Messungen) — seit {days} Tagen auf {dose}."
       },
       "retarget": {
         "label": "Nicht der richtige Messwert?",

messages/en.json

@@ -1875,7 +1875,7 @@
       "levelShift": "A shift in the level was detected around {date}.",
       "plateau": {
         "title": "Weight plateau on the current dose",
-        "evidence": "Weight moved by {delta} kg over the last {window} days ({readings} readings) — {days} days on {dose}."
+        "evidence": "Weight moved by {delta} {unit} over the last {window} days ({readings} readings) — {days} days on {dose}."
       },
       "retarget": {
         "label": "Not the right measurement?",

messages/es.json

@@ -1887,7 +1887,7 @@
       "levelShift": "Se detectó un cambio de nivel en torno a {date}.",
       "plateau": {
         "title": "Meseta de peso con la dosis actual",
-        "evidence": "Variación de peso de {delta} kg en los últimos {window} días ({readings} mediciones) — {days} días con {dose}."
+        "evidence": "Variación de peso de {delta} {unit} en los últimos {window} días ({readings} mediciones) — {days} días con {dose}."
       },
       "retarget": {
         "label": "¿No es la medición correcta?",

messages/fr.json

@@ -1889,7 +1889,7 @@
       "levelShift": "Un changement de niveau a été détecté autour du {date}.",
       "plateau": {
         "title": "Plateau de poids à la dose actuelle",
-        "evidence": "Variation de poids de {delta} kg sur les {window} derniers jours ({readings} mesures) — {days} jours sous {dose}."
+        "evidence": "Variation de poids de {delta} {unit} sur les {window} derniers jours ({readings} mesures) — {days} jours sous {dose}."
       },
       "retarget": {
         "label": "Ce n'est pas la bonne mesure ?",

messages/it.json

@@ -1879,7 +1879,7 @@
       "levelShift": "È stato rilevato un cambio di livello intorno al {date}.",
       "plateau": {
         "title": "Plateau del peso alla dose attuale",
-        "evidence": "Variazione di peso di {delta} kg negli ultimi {window} giorni ({readings} misurazioni) — {days} giorni con {dose}."
+        "evidence": "Variazione di peso di {delta} {unit} negli ultimi {window} giorni ({readings} misurazioni) — {days} giorni con {dose}."
       },
       "retarget": {
         "label": "Non è la misurazione giusta?",

messages/pl.json

@@ -1873,7 +1873,7 @@
       "levelShift": "Wykryto zmianę poziomu w okolicach {date}.",
       "plateau": {
         "title": "Plateau masy ciała przy obecnej dawce",
-        "evidence": "Zmiana masy ciała o {delta} kg w ciągu ostatnich {window} dni ({readings} pomiarów) — {days} dni na dawce {dose}."
+        "evidence": "Zmiana masy ciała o {delta} {unit} w ciągu ostatnich {window} dni ({readings} pomiarów) — {days} dni na dawce {dose}."
       },
       "retarget": {
         "label": "To nie ten pomiar?",

src/components/cycle/cycle-phase-crosstab.tsx

@@ -1,6 +1,7 @@
 "use client";
 
 import { useTranslations } from "@/lib/i18n/context";
+import { useUnitDisplay } from "@/hooks/use-unit-display";
 import { cn } from "@/lib/utils";
 
 /**
@@ -77,6 +78,18 @@ function fmt(value: number, display: CyclePhaseCrosstabDisplay): string {
   return display === "steps" ? Math.round(value).toString() : value.toFixed(1);
 }
 
+/**
+ * v1.32.26 — the two displays whose values follow the metric/imperial
+ * preference, mapped to the measurement type that carries the transform. Weight
+ * is offset-free (kg→lb); temperature is affine (°C→°F), so an ABSOLUTE phase
+ * average takes `toDisplay` while a phase DELTA takes `toDisplayDelta` (the
+ * offset must never leak into a difference).
+ */
+const DISPLAY_TO_TYPE: Partial<Record<CyclePhaseCrosstabDisplay, string>> = {
+  kg: "WEIGHT",
+  celsius: "BODY_TEMPERATURE",
+};
+
 const HEADLINE_KEY: Record<string, string> = {
   restingHeartRate: "cycle.insights.headline.restingHeartRate",
   heartRateVariability: "cycle.insights.headline.heartRateVariability",
@@ -93,6 +106,7 @@ export function CyclePhaseHeadline({
   headline: CyclePhaseCrosstabRow | null;
 }) {
   const { t } = useTranslations();
+  const unitDisplay = useUnitDisplay();
   if (!headline) {
     return (
       <p
@@ -108,8 +122,9 @@ export function CyclePhaseHeadline({
   );
   // Defensive: an unmapped display must never pass undefined to `t` (whose
   // resolver does `key.split(".")`). An empty unit is the honest degrade.
+  const mt = DISPLAY_TO_TYPE[headline.display];
   const unitKey = UNIT_KEY[headline.display];
-  const unit = unitKey ? t(unitKey) : "";
+  const unit = mt ? unitDisplay.unitFor(mt) : unitKey ? t(unitKey) : "";
   const up = headline.delta >= 0;
   const dir = t(
     up
@@ -118,7 +133,13 @@ export function CyclePhaseHeadline({
   );
   const params = {
     metric: metricLabel,
-    delta: fmt(Math.abs(headline.delta), headline.display),
+    // A phase delta → factor-only conversion (no affine offset).
+    delta: fmt(
+      Math.abs(
+        mt ? unitDisplay.toDisplayDelta(mt, headline.delta) : headline.delta,
+      ),
+      headline.display,
+    ),
     unit,
     dir,
   };
@@ -141,6 +162,7 @@ export function CyclePhaseCrosstab({
   rows: CyclePhaseCrosstabRow[];
 }) {
   const { t } = useTranslations();
+  const unitDisplay = useUnitDisplay();
   if (rows.length === 0) return null;
 
   return (
@@ -155,15 +177,20 @@ export function CyclePhaseCrosstab({
           );
           // Defensive: an unmapped display must never pass undefined to `t`
           // (whose resolver does `key.split(".")`). Empty unit on a miss.
+          const mt = DISPLAY_TO_TYPE[row.display];
           const unitKey = UNIT_KEY[row.display];
-          const unit = unitKey ? t(unitKey) : "";
+          const unit = mt ? unitDisplay.unitFor(mt) : unitKey ? t(unitKey) : "";
+          const absConv = (v: number) =>
+            mt ? unitDisplay.toDisplay(mt, v) : v;
+          const deltaConv = (v: number) =>
+            mt ? unitDisplay.toDisplayDelta(mt, v) : v;
           // `delta` = lutealAvg − follicularAvg: positive = the vital runs
           // higher in the luteal phase. The number stays NEUTRAL — higher is
           // good for steps but bad for resting HR, and this board is
           // observational, so colouring it would imply a verdict the data
           // doesn't support. The sign prefix + `data-direction` carry it.
           const up = row.delta >= 0;
-          const deltaText = `${up ? "+" : ""}${fmt(row.delta, row.display)} ${unit}`;
+          const deltaText = `${up ? "+" : ""}${fmt(deltaConv(row.delta), row.display)} ${unit}`;
           return (
             <li
               key={row.metricKey}
@@ -197,8 +224,8 @@ export function CyclePhaseCrosstab({
               <p className="text-muted-foreground text-xs">
                 {t("cycle.insights.crosstab.detail", {
                   metric: metricLabel,
-                  lutealAvg: fmt(row.lutealAvg, row.display),
-                  follicularAvg: fmt(row.follicularAvg, row.display),
+                  lutealAvg: fmt(absConv(row.lutealAvg), row.display),
+                  follicularAvg: fmt(absConv(row.follicularAvg), row.display),
                   unit,
                   lutealDays: row.lutealDays,
                   follicularDays: row.follicularDays,

src/components/insights/glp1-plateau-note.tsx

@@ -27,6 +27,7 @@ import { TileHeader } from "@/components/insights/tile-header";
 import { queryKeys } from "@/lib/query-keys";
 import { apiGet } from "@/lib/api/api-fetch";
 import { useTranslations } from "@/lib/i18n/context";
+import { useUnitDisplay } from "@/hooks/use-unit-display";
 import type { Glp1PlateauContext } from "@/lib/insights/glp1-plateau";
 
 interface Glp1PlateauResponse {
@@ -36,6 +37,7 @@ interface Glp1PlateauResponse {
 
 export function Glp1PlateauNote() {
   const { t } = useTranslations();
+  const unitDisplay = useUnitDisplay();
   const { data } = useQuery({
     queryKey: queryKeys.insightsGlp1Plateau(),
     queryFn: () => apiGet<Glp1PlateauResponse>("/api/insights/glp1-plateau"),
@@ -45,10 +47,13 @@ export function Glp1PlateauNote() {
   if (!data?.plateau) return null;
   const plateau = data.plateau;
 
-  const delta =
-    plateau.weightDeltaKg > 0
-      ? `+${plateau.weightDeltaKg}`
-      : `${plateau.weightDeltaKg}`;
+  // The weight change is a DELTA → factor-only conversion (no affine offset).
+  const deltaValue =
+    Math.round(
+      unitDisplay.toDisplayDelta("WEIGHT", plateau.weightDeltaKg) * 10,
+    ) / 10;
+  const delta = deltaValue > 0 ? `+${deltaValue}` : `${deltaValue}`;
+  const unit = unitDisplay.unitFor("WEIGHT");
   const dose = `${plateau.drug} ${plateau.doseValue} ${plateau.doseUnit}`;
 
   return (
@@ -64,6 +69,7 @@ export function Glp1PlateauNote() {
         <p className="text-muted-foreground text-sm">
           {t("medications.efficacy.plateau.evidence", {
             delta,
+            unit,
             window: data.windowDays,
             readings: plateau.readingsCount,
             days: plateau.daysOnDose,

src/components/insights/mood/mood-factor-metric-crosstab.tsx

@@ -1,6 +1,7 @@
 "use client";
 
 import { useTranslations } from "@/lib/i18n/context";
+import { useUnitDisplay } from "@/hooks/use-unit-display";
 import { moodTagIcon } from "@/components/mood/mood-tag-icons";
 import { cn } from "@/lib/utils";
 import type { MoodInfluenceConfidence } from "./mood-tag-influence";
@@ -85,6 +86,7 @@ export function MoodFactorMetricCrosstab({
   rows: MoodFactorMetricCrosstabRow[];
 }) {
   const { t } = useTranslations();
+  const unitDisplay = useUnitDisplay();
   if (rows.length === 0) return null;
 
   return (
@@ -99,7 +101,16 @@ export function MoodFactorMetricCrosstab({
           const metricLabel = t(
             METRIC_LABEL_KEY[row.metricKey] ?? row.metricKey,
           );
-          const unit = t(UNIT_KEY[row.display]);
+          // v1.32.26 — the weight ("kg") row follows the metric/imperial
+          // preference: the unit symbol + the values (averages + delta, all in
+          // kg, offset-free) convert together. Every other display is unitless
+          // to the preference and keeps its i18n label + raw value.
+          const isWeightRow = row.display === "kg";
+          const unit = isWeightRow
+            ? unitDisplay.unitFor("WEIGHT")
+            : t(UNIT_KEY[row.display]);
+          const conv = (v: number) =>
+            isWeightRow ? unitDisplay.toDisplay("WEIGHT", v) : v;
           // `delta` = lowAvg − highAvg: positive = the vital runs higher on the
           // low-factor (worse) days. The number stays NEUTRAL — a higher value
           // is good for steps but bad for resting HR, and this board is
@@ -107,7 +118,7 @@ export function MoodFactorMetricCrosstab({
           // green/red would imply a health verdict the data doesn't support.
           // The sign prefix + `data-direction` carry the direction.
           const up = row.delta >= 0;
-          const deltaText = `${up ? "+" : ""}${fmt(row.delta, row.display)} ${unit}`;
+          const deltaText = `${up ? "+" : ""}${fmt(conv(row.delta), row.display)} ${unit}`;
           return (
             <li
               key={`${row.metricKey}:${row.factor}`}
@@ -153,8 +164,8 @@ export function MoodFactorMetricCrosstab({
                   {
                     factor: factorLabel,
                     metric: metricLabel,
-                    lowAvg: fmt(row.lowAvg, row.display),
-                    highAvg: fmt(row.highAvg, row.display),
+                    lowAvg: fmt(conv(row.lowAvg), row.display),
+                    highAvg: fmt(conv(row.highAvg), row.display),
                     unit,
                     lowDays: row.lowDays,
                   },