fix(insights): plot the trends row and log fevers in the reader's units

Two more surfaces carried a fixed unit. The insights trends row labelled
weight in kg and body temperature in °C for every reader, and plotted
walking distance as raw metres under a km label; its trend caption
said the same. A single transformed series there now takes unit, scale
and offset from the preference, and the caption describes the converted
series against a converted noise floor.

The illness day sheet and timeline showed and took a fever in °C. The
fever is now seeded, typed and shown in the reader's temperature unit
and stored in °C as before.

Refs #1067

messages/de.json

@@ -9405,7 +9405,7 @@
       "severity": "Stärke {severity}",
       "noSymptoms": "Keine Symptome erfasst.",
       "impact": "Befinden: {impact}",
-      "fever": "Temperatur: {value} °C",
+      "fever": "Temperatur: {value} {unit}",
       "empty": "Noch keine Tage erfasst."
     },
     "loadError": "Diese Episode konnte nicht geladen werden.",

messages/en.json

@@ -9405,7 +9405,7 @@
       "severity": "Severity {severity}",
       "noSymptoms": "No symptoms logged.",
       "impact": "How you functioned: {impact}",
-      "fever": "Temperature: {value} °C",
+      "fever": "Temperature: {value} {unit}",
       "empty": "No days logged yet."
     },
     "loadError": "Could not load this episode.",

messages/es.json

@@ -9405,7 +9405,7 @@
       "severity": "Intensidad {severity}",
       "noSymptoms": "Sin síntomas registrados.",
       "impact": "Cómo funcionaste: {impact}",
-      "fever": "Temperatura: {value} °C",
+      "fever": "Temperatura: {value} {unit}",
       "empty": "Todavía no hay días registrados."
     },
     "loadError": "No se pudo cargar este episodio.",

messages/fr.json

@@ -9405,7 +9405,7 @@
       "severity": "Intensité {severity}",
       "noSymptoms": "Aucun symptôme enregistré.",
       "impact": "Votre forme : {impact}",
-      "fever": "Température : {value} °C",
+      "fever": "Température : {value} {unit}",
       "empty": "Aucun jour enregistré pour l’instant."
     },
     "loadError": "Impossible de charger cet épisode.",

messages/it.json

@@ -9405,7 +9405,7 @@
       "severity": "Intensità {severity}",
       "noSymptoms": "Nessun sintomo registrato.",
       "impact": "Come ti sei sentito: {impact}",
-      "fever": "Temperatura: {value} °C",
+      "fever": "Temperatura: {value} {unit}",
       "empty": "Nessun giorno registrato finora."
     },
     "loadError": "Impossibile caricare questo episodio.",

messages/ko.json

@@ -9405,7 +9405,7 @@
       "severity": "심각도 {severity}",
       "noSymptoms": "기록한 증상이 없어요.",
       "impact": "활동 정도: {impact}",
-      "fever": "체온: {value}°C",
+      "fever": "체온: {value}{unit}",
       "empty": "아직 기록한 날이 없어요."
     },
     "loadError": "이 에피소드를 불러오지 못했어요.",

messages/pl.json

@@ -9405,7 +9405,7 @@
       "severity": "Nasilenie {severity}",
       "noSymptoms": "Nie zapisano objawów.",
       "impact": "Jak funkcjonowałeś: {impact}",
-      "fever": "Temperatura: {value} °C",
+      "fever": "Temperatura: {value} {unit}",
       "empty": "Nie zapisano jeszcze żadnych dni."
     },
     "loadError": "Nie udało się wczytać tego epizodu.",