Keep chart ticks readable and insights strings in the reader's language

A word-length unit on the y-axis ticks ('Schritte', 'Atemzüge/min',
'mL/(kg·min)') was wider than the axis gutter and lost its leading
digits; such units stay off the ticks, where the stat strip above
already names them. The sleep stage toggle reads '7T / 14T / 30T' like
every other range control, the 'Mood entries' and '7-day' target sources
are named in the reader's language, and the BMI and medication empty
states ask the coach in that language too.

messages/de.json

@@ -2407,6 +2407,7 @@
     "days7Label": "7T",
     "days7Title": "Letzte 7 Tage",
     "days30Label": "30T",
+    "daysNLabel": "{days}T",
     "days30Title": "Letzte 30 Tage",
     "days90Label": "90T",
     "days90Title": "Letzte 90 Tage",
@@ -4745,6 +4746,12 @@
       "settingsBody": "HealthLog funktioniert vollständig ohne KI. Verbinde unten einen Anbieter, wenn du ein tägliches Briefing, kurze Notizen zu deinen Werten und den Coach möchtest.",
       "action": "KI einrichten",
       "dismiss": "Nicht jetzt"
+    },
+    "bmiHeight": {
+      "coachPrefill": "Ich habe meine Körpergröße noch nicht eingetragen — warum ist der BMI wichtig, und was sollte ich wissen, bevor ich sie eintrage?"
+    },
+    "medicationsEmpty": {
+      "coachPrefill": "Ich habe noch keine Medikamente angelegt — was sollte ich wissen, bevor ich hier anfange, meine Therapietreue zu verfolgen?"
     }
   },
   "thresholds": {
@@ -8497,6 +8504,10 @@
     "currentValue": "Aktuell: {value} {unit}",
     "targetRangeValue": "Zielbereich: {min}–{max} {unit}",
     "sourceLabel": "Quelle: {source}",
+    "sourceNames": {
+      "moodEntries": "Stimmungseinträge",
+      "sevenDays": "7 Tage"
+    },
     "inTarget": "Im Zielbereich",
     "aboveTarget": "{delta} {unit} über Zielbereich",
     "belowTarget": "{delta} {unit} unter Zielbereich",

messages/en.json

@@ -2407,6 +2407,7 @@
     "days7Label": "7d",
     "days7Title": "Last 7 days",
     "days30Label": "30d",
+    "daysNLabel": "{days}d",
     "days30Title": "Last 30 days",
     "days90Label": "90d",
     "days90Title": "Last 90 days",
@@ -4745,6 +4746,12 @@
       "settingsBody": "HealthLog works fully without AI. Connect a provider below if you want a daily briefing, short notes on your readings and the Coach.",
       "action": "Set up AI",
       "dismiss": "Not now"
+    },
+    "bmiHeight": {
+      "coachPrefill": "I haven’t set my height yet — why does BMI matter, and what should I know before I configure it?"
+    },
+    "medicationsEmpty": {
+      "coachPrefill": "I haven’t added any medications yet — what should I know before I start tracking medication compliance here?"
     }
   },
   "thresholds": {
@@ -8497,6 +8504,10 @@
     "currentValue": "Current: {value} {unit}",
     "targetRangeValue": "Target: {min}–{max} {unit}",
     "sourceLabel": "Source: {source}",
+    "sourceNames": {
+      "moodEntries": "Mood entries",
+      "sevenDays": "7 days"
+    },
     "inTarget": "Within target range",
     "aboveTarget": "{delta} {unit} above target",
     "belowTarget": "{delta} {unit} below target",

messages/es.json

@@ -2407,6 +2407,7 @@
     "days7Label": "7 d",
     "days7Title": "Últimos 7 días",
     "days30Label": "30 d",
+    "daysNLabel": "{days} d",
     "days30Title": "Últimos 30 días",
     "days90Label": "90 d",
     "days90Title": "Últimos 90 días",
@@ -4745,6 +4746,12 @@
       "settingsBody": "HealthLog funciona por completo sin IA. Conecta un proveedor abajo si quieres un resumen diario, notas breves sobre tus mediciones y el Coach.",
       "action": "Configurar IA",
       "dismiss": "Ahora no"
+    },
+    "bmiHeight": {
+      "coachPrefill": "Todavía no he indicado mi altura: ¿por qué importa el IMC y qué debería saber antes de configurarla?"
+    },
+    "medicationsEmpty": {
+      "coachPrefill": "Todavía no he añadido medicamentos: ¿qué debería saber antes de empezar a seguir aquí la adherencia?"
     }
   },
   "thresholds": {
@@ -8497,6 +8504,10 @@
     "currentValue": "Actual: {value} {unit}",
     "targetRangeValue": "Rango objetivo: {min}–{max} {unit}",
     "sourceLabel": "Fuente: {source}",
+    "sourceNames": {
+      "moodEntries": "Entradas de ánimo",
+      "sevenDays": "7 días"
+    },
     "inTarget": "En rango objetivo",
     "aboveTarget": "{delta} {unit} por encima del rango",
     "belowTarget": "{delta} {unit} por debajo del rango",

messages/fr.json

@@ -2407,6 +2407,7 @@
     "days7Label": "7 j",
     "days7Title": "7 derniers jours",
     "days30Label": "30 j",
+    "daysNLabel": "{days} j",
     "days30Title": "30 derniers jours",
     "days90Label": "90 j",
     "days90Title": "90 derniers jours",
@@ -4745,6 +4746,12 @@
       "settingsBody": "HealthLog fonctionne entièrement sans IA. Connectez un fournisseur ci-dessous si vous voulez un briefing quotidien, de courtes notes sur vos mesures et le Coach.",
       "action": "Configurer l'IA",
       "dismiss": "Pas maintenant"
+    },
+    "bmiHeight": {
+      "coachPrefill": "Je n’ai pas encore indiqué ma taille — pourquoi l’IMC compte-t-il, et que dois-je savoir avant de la renseigner ?"
+    },
+    "medicationsEmpty": {
+      "coachPrefill": "Je n’ai encore ajouté aucun médicament — que dois-je savoir avant de suivre ici l’observance ?"
     }
   },
   "thresholds": {
@@ -8497,6 +8504,10 @@
     "currentValue": "Actuel : {value} {unit}",
     "targetRangeValue": "Plage cible : {min}–{max} {unit}",
     "sourceLabel": "Source : {source}",
+    "sourceNames": {
+      "moodEntries": "Entrées d’humeur",
+      "sevenDays": "7 jours"
+    },
     "inTarget": "Dans la plage cible",
     "aboveTarget": "{delta} {unit} au-dessus de la plage",
     "belowTarget": "{delta} {unit} en dessous de la plage",

messages/it.json

@@ -2407,6 +2407,7 @@
     "days7Label": "7 g",
     "days7Title": "Ultimi 7 giorni",
     "days30Label": "30 g",
+    "daysNLabel": "{days} g",
     "days30Title": "Ultimi 30 giorni",
     "days90Label": "90 g",
     "days90Title": "Ultimi 90 giorni",
@@ -4745,6 +4746,12 @@
       "settingsBody": "HealthLog funziona completamente senza IA. Collega un fornitore qui sotto se vuoi un riepilogo giornaliero, brevi note sulle tue misurazioni e il Coach.",
       "action": "Configura IA",
       "dismiss": "Non ora"
+    },
+    "bmiHeight": {
+      "coachPrefill": "Non ho ancora inserito la mia altezza: perché conta il BMI e cosa dovrei sapere prima di impostarla?"
+    },
+    "medicationsEmpty": {
+      "coachPrefill": "Non ho ancora aggiunto farmaci: cosa dovrei sapere prima di iniziare a monitorare qui l’aderenza?"
     }
   },
   "thresholds": {
@@ -8497,6 +8504,10 @@
     "currentValue": "Attuale: {value} {unit}",
     "targetRangeValue": "Range obiettivo: {min}–{max} {unit}",
     "sourceLabel": "Fonte: {source}",
+    "sourceNames": {
+      "moodEntries": "Voci dell’umore",
+      "sevenDays": "7 giorni"
+    },
     "inTarget": "Nel range obiettivo",
     "aboveTarget": "{delta} {unit} sopra il range",
     "belowTarget": "{delta} {unit} sotto il range",

messages/ko.json

@@ -2498,6 +2498,7 @@
     "days7Label": "7일",
     "days7Title": "최근 7일",
     "days30Label": "30일",
+    "daysNLabel": "{days}일",
     "days30Title": "최근 30일",
     "days90Label": "90일",
     "days90Title": "최근 90일",
@@ -4745,6 +4746,12 @@
       "settingsBody": "HealthLog는 AI 없이도 모든 기능이 작동합니다. 일일 브리핑, 측정값에 대한 짧은 메모, 코치를 원하시면 아래에서 제공자를 연결하세요.",
       "action": "AI 설정",
       "dismiss": "나중에"
+    },
+    "bmiHeight": {
+      "coachPrefill": "아직 키를 입력하지 않았어요. BMI가 왜 중요하고, 입력하기 전에 무엇을 알아야 하나요?"
+    },
+    "medicationsEmpty": {
+      "coachPrefill": "아직 약을 추가하지 않았어요. 여기서 복약 순응도를 기록하기 전에 무엇을 알아야 하나요?"
     }
   },
   "thresholds": {
@@ -8497,6 +8504,10 @@
     "currentValue": "현재: {value} {unit}",
     "targetRangeValue": "목표: {min}–{max} {unit}",
     "sourceLabel": "출처: {source}",
+    "sourceNames": {
+      "moodEntries": "기분 기록",
+      "sevenDays": "7일"
+    },
     "inTarget": "목표 범위 안",
     "aboveTarget": "목표보다 {delta} {unit} 높음",
     "belowTarget": "목표보다 {delta} {unit} 낮음",

messages/pl.json

@@ -2407,6 +2407,7 @@
     "days7Label": "7 dni",
     "days7Title": "Ostatnie 7 dni",
     "days30Label": "30 dni",
+    "daysNLabel": "{days} dni",
     "days30Title": "Ostatnie 30 dni",
     "days90Label": "90 dni",
     "days90Title": "Ostatnie 90 dni",
@@ -4745,6 +4746,12 @@
       "settingsBody": "HealthLog działa w pełni bez AI. Podłącz dostawcę poniżej, jeśli chcesz codzienne podsumowanie, krótkie notatki o pomiarach i Coacha.",
       "action": "Skonfiguruj AI",
       "dismiss": "Nie teraz"
+    },
+    "bmiHeight": {
+      "coachPrefill": "Nie podałem jeszcze wzrostu — dlaczego BMI ma znaczenie i co powinienem wiedzieć, zanim go ustawię?"
+    },
+    "medicationsEmpty": {
+      "coachPrefill": "Nie dodałem jeszcze żadnych leków — co powinienem wiedzieć, zanim zacznę tu śledzić przestrzeganie zaleceń?"
     }
   },
   "thresholds": {
@@ -8497,6 +8504,10 @@
     "currentValue": "Aktualnie: {value} {unit}",
     "targetRangeValue": "Zakres docelowy: {min}–{max} {unit}",
     "sourceLabel": "Źródło: {source}",
+    "sourceNames": {
+      "moodEntries": "Wpisy nastroju",
+      "sevenDays": "7 dni"
+    },
     "inTarget": "W zakresie docelowym",
     "aboveTarget": "{delta} {unit} powyżej zakresu",
     "belowTarget": "{delta} {unit} poniżej zakresu",

src/app/insights/bmi/page.tsx

@@ -95,7 +95,7 @@ export default function InsightsBmiPage() {
             </Button>
           }
         />
-        <CoachLaunchButton prefill="I haven't set my height yet — why does BMI matter, and what should I know before I configure it?" />
+        <CoachLaunchButton prefill={t("insights.bmiHeight.coachPrefill")} />
       </SubPageShell>
     );
   }

src/app/insights/medications/page.tsx

@@ -208,7 +208,9 @@ export default function InsightsMedikamentePage() {
             </Button>
           }
         />
-        <CoachLaunchButton prefill="I haven't added any medications yet — what should I know before I start tracking medication compliance here?" />
+        <CoachLaunchButton
+          prefill={t("insights.medicationsEmpty.coachPrefill")}
+        />
       </SubPageShell>
     );
   }

src/components/charts/health-chart.tsx

@@ -76,7 +76,7 @@ import {
   type MetricWindowStats,
 } from "@/lib/charts/window-stats";
 import { shouldFireDataReady } from "@/lib/charts/data-ready-latch";
-import { axisUnitSuffix } from "@/lib/charts/axis-unit";
+import { axisTickUnitSuffix } from "@/lib/charts/axis-unit";
 import { chartPointDayKey } from "@/components/day/chart-day";
 import {
   ChartDayFooter,
@@ -2078,7 +2078,7 @@ export function HealthChart({
                     }
                     unit={
                       showYAxisUnit
-                        ? axisUnitSuffix(yAxisUnit ?? unit)
+                        ? axisTickUnitSuffix(yAxisUnit ?? unit)
                         : undefined
                     }
                   />

src/components/insights/__tests__/metric-target-source-name.test.ts

@@ -0,0 +1,16 @@
+import { describe, expect, it } from "vitest";
+
+import { sourceName } from "../metric-target-summary";
+
+describe("sourceName", () => {
+  const t = (key: string) => `t:${key}`;
+  it("names the plain-description sources in the reader's language", () => {
+    expect(sourceName("Mood entries", t)).toBe(
+      "t:targets.sourceNames.moodEntries",
+    );
+    expect(sourceName("7-day", t)).toBe("t:targets.sourceNames.sevenDays");
+  });
+  it("leaves a citation as it is", () => {
+    expect(sourceName("ESH 2023", t)).toBe("ESH 2023");
+  });
+});

src/components/insights/__tests__/sleep-stage-stacked-bar.test.tsx

@@ -88,6 +88,9 @@ describe("<SleepStageStackedBar>", () => {
     const html = render(<SleepStageStackedBar breakdown={breakdown} />, "de");
     expect(html).toContain("Phasen-Verteilung");
     expect(html).toContain("Letzte 7 Nächte");
+    // The window toggle speaks the app's range vocabulary, not "7d".
+    expect(html).toContain(">7T<");
+    expect(html).not.toContain(">7d<");
   });
 
   it("does not crash when the breakdown carries unknown stage keys", () => {

src/components/insights/metric-target-summary.tsx

@@ -421,12 +421,18 @@ function TargetReferencePanel({
               rel="noopener noreferrer"
               className="text-muted-foreground hover:text-foreground inline-flex items-center gap-1 text-xs"
             >
-              <span>{t("targets.sourceLabel", { source: target.source })}</span>
+              <span>
+                {t("targets.sourceLabel", {
+                  source: sourceName(target.source, t),
+                })}
+              </span>
               <ExternalLink className="size-3" aria-hidden="true" />
             </a>
           ) : (
             <span className="text-muted-foreground text-xs">
-              {t("targets.sourceLabel", { source: target.source })}
+              {t("targets.sourceLabel", {
+                source: sourceName(target.source, t),
+              })}
             </span>
           )}
         </div>
@@ -434,3 +440,19 @@ function TargetReferencePanel({
     </Card>
   );
 }
+
+/**
+ * Two target sources are plain descriptions rather than a citation ("Mood
+ * entries", "7-day"); the server sends them in English, so they are named in
+ * the reader's language here. Every other source is a citation (ESH 2023,
+ * WHO, AASM/SRS) and reads as it is.
+ */
+const SOURCE_NAME_KEYS: Record<string, string> = {
+  "Mood entries": "targets.sourceNames.moodEntries",
+  "7-day": "targets.sourceNames.sevenDays",
+};
+
+export function sourceName(source: string, t: (key: string) => string): string {
+  const key = SOURCE_NAME_KEYS[source];
+  return key ? t(key) : source;
+}

src/components/insights/sleep-stage-stacked-bar.tsx

@@ -396,7 +396,9 @@ export function SleepStageStackedBar({ breakdown }: SleepStageStackedBarProps) {
                 aria-pressed={windowDays === w}
                 data-slot={`sleep-stage-window-${w}`}
               >
-                {w}d
+                {/* The page's other range controls read "7T / 30T"; this
+                    one printed an English "7d" beside them. */}
+                {t("charts.daysNLabel", { days: w })}
               </Button>
             ))}
           </div>

src/lib/charts/__tests__/axis-unit.test.ts

@@ -7,7 +7,7 @@ import {
   stripComments,
   walkSourceFiles,
 } from "@/__tests__/helpers/source-files";
-import { axisUnitSuffix } from "../axis-unit";
+import { axisTickUnitSuffix, axisUnitSuffix } from "../axis-unit";
 
 const COMPONENTS = join(process.cwd(), "src", "components");
 
@@ -54,3 +54,15 @@ describe("axis unit suffix", () => {
     expect(offenders).toEqual([]);
   });
 });
+
+describe("axisTickUnitSuffix", () => {
+  it("keeps a short unit on the ticks", () => {
+    expect(axisTickUnitSuffix("bpm")).toBe(axisUnitSuffix("bpm"));
+    expect(axisTickUnitSuffix("mg/dL")).toBe(axisUnitSuffix("mg/dL"));
+  });
+  it("keeps a word-length unit off the ticks, where it was clipped", () => {
+    expect(axisTickUnitSuffix("Schritte")).toBeUndefined();
+    expect(axisTickUnitSuffix("Atemzüge/min")).toBeUndefined();
+    expect(axisTickUnitSuffix("mL/(kg·min)")).toBeUndefined();
+  });
+});

src/lib/charts/axis-unit.ts

@@ -13,3 +13,20 @@ export function axisUnitSuffix(
 ): string | undefined {
   return unit ? ` ${unit}` : undefined;
 }
+
+/**
+ * The longest unit a tick label carries. A word-length unit ("Schritte",
+ * "Atemzüge/min", "mL/(kg·min)") made every tick wider than the fixed y-axis
+ * gutter, and the label was clipped at its left edge (".744 Schritte"). Such
+ * a unit stays off the ticks; the stat strip and the tile above the chart
+ * already name it.
+ */
+export const MAX_TICK_UNIT_LENGTH = 5;
+
+/** The tick suffix for `unit`, or none when the unit is too long to fit. */
+export function axisTickUnitSuffix(
+  unit: string | null | undefined,
+): string | undefined {
+  if (!unit || unit.length > MAX_TICK_UNIT_LENGTH) return undefined;
+  return axisUnitSuffix(unit);
+}