fix(insights): localise the Coach scope pill and clarify the return-to-baseline copy

The "the Coach is already on …" pill resolved its metric label through the
brand-free English domain vocabulary, so it read in English on every
non-English locale. It now prefers the existing localised measurements.type*
name for each measurement-backed source, keeping the English phrase only for
the gait/audio long tail that rarely becomes a scoped launch. Also rewords the
English return-to-baseline line so the day count reads as the in-range run
length rather than the time since.

messages/en.json

@@ -3600,7 +3600,7 @@
       }
     },
     "streak": {
-      "returnLabel": "Your {metric} is back inside your usual range after {count} days — whatever that was, it's passed.",
+      "returnLabel": "Your {metric} has been back inside your usual range for {count} days now — whatever that was, it's passed.",
       "daysInside": "{count} days inside",
       "daysOutside": "{count} days outside"
     }

src/components/insights/coach-metric-scope.ts

@@ -168,7 +168,7 @@ export function scopeSourceFromMetricKey(
 }
 
 /**
- * v1.22.0 (A2) — the human label for a launch scope's primary metric, for
+ * v1.21.2 (A2) — the human label for a launch scope's primary metric, for
  * the VISIBLE "the Coach is already on …" pill. The caller resolves the
  * i18n string via `t("insights.coach.scope.metric.<source>")`; this helper
  * supplies the English domain phrase as the deterministic fallback for any
@@ -182,3 +182,42 @@ export function metricScopeLabelFallback(
   if (!metric) return null;
   return COACH_SOURCE_DOMAIN_LABEL[metric] ?? (metric as string);
 }
+
+/**
+ * v1.21.2 (A2) — map a launch-scope source onto the EXISTING localised
+ * `measurements.type*` metric-name key. The scope pill reads in the user's
+ * own language for every measurement-backed source, instead of the English
+ * `COACH_SOURCE_DOMAIN_LABEL` fallback that only carries the brand-free
+ * domain phrase. Sources without a measurement name (mood, the gait / audio
+ * long tail) keep that English fallback — they almost never become a scoped
+ * launch. Returns the key, or null when the source has no localised name.
+ */
+const SCOPE_SOURCE_METRIC_LABEL_KEY: Partial<Record<CoachScopeSource, string>> =
+  {
+    bp: "measurements.typeBloodPressure",
+    weight: "measurements.typeWeight",
+    pulse: "measurements.typePulse",
+    hrv: "measurements.typeHeartRateVariability",
+    resting_hr: "measurements.typeRestingHeartRate",
+    respiratory_rate: "measurements.typeRespiratoryRate",
+    spo2: "measurements.typeOxygenSaturation",
+    bmi: "measurements.typeBodyMassIndex",
+    body_temp: "measurements.typeBodyTemperature",
+    vo2_max: "measurements.typeVo2Max",
+    sleep: "measurements.typeSleep",
+    body_fat: "measurements.typeBodyFat",
+    fat_mass: "measurements.typeFatMass",
+    fat_free_mass: "measurements.typeFatFreeMass",
+    muscle_mass: "measurements.typeMuscleMass",
+    lean_body_mass: "measurements.typeLeanBodyMass",
+    bone_mass: "measurements.typeBoneMass",
+    active_energy: "measurements.typeActiveEnergyBurned",
+    flights: "measurements.typeFlightsClimbed",
+  };
+
+export function scopeSourceMetricLabelKey(
+  metric: CoachScopeSource | undefined | null,
+): string | null {
+  if (!metric) return null;
+  return SCOPE_SOURCE_METRIC_LABEL_KEY[metric] ?? null;
+}

src/components/insights/coach-panel/coach-conversation.tsx

@@ -20,7 +20,10 @@ import { apiDelete, apiGet } from "@/lib/api/api-fetch";
 import type { CoachScope } from "@/lib/ai/coach/types";
 import type { CoachLaunchScope } from "@/lib/insights/coach-launch-context";
 import type { CoachSeededQuestionDTO } from "@/app/api/insights/coach/seeded-question/route";
-import { metricScopeLabelFallback } from "@/components/insights/coach-metric-scope";
+import {
+  metricScopeLabelFallback,
+  scopeSourceMetricLabelKey,
+} from "@/components/insights/coach-metric-scope";
 
 import { CoachDrawerBody } from "./coach-drawer-body";
 import { CoachHero } from "./coach-hero";
@@ -444,7 +447,7 @@ export function CoachConversation({
     pendingQuestions.length === 0 &&
     !pendingAdopt;
 
-  // v1.22.0 (A2 + A3) — the visible scope/opener affordance for the hero.
+  // v1.21.2 (A2 + A3) — the visible scope/opener affordance for the hero.
   //
   // A2 (scoped launch): the Coach was opened narrowed to a metric. Make it
   // visible — a "the Coach is already on <metric>" pill plus the data-aware
@@ -482,8 +485,10 @@ export function CoachConversation({
   // to the brand-free English domain phrase so every source has a label.
   // Hoisted so both the hero hint (page) and the sources rail (drawer) read
   // the same string. Null when the launch carried no metric.
+  const a2LabelKey = scopeSourceMetricLabelKey(a2Metric);
   const a2MetricLabel = a2Metric
     ? (tOrNull(`insights.coach.scope.metric.${a2Metric}`) ??
+      (a2LabelKey ? tOrNull(a2LabelKey) : null) ??
       metricScopeLabelFallback(a2Metric) ??
       a2Metric)
     : null;
@@ -787,7 +792,7 @@ export function CoachConversation({
         onSourcesOpenChange={setSourcesTrayOpen}
         sourcesRail={
           <SourcesRail
-            // v1.22.0 (A2) — surface the launch scope on the drawer surface;
+            // v1.21.2 (A2) — surface the launch scope on the drawer surface;
             // only set for a fresh, scoped, not-yet-sent conversation so a
             // continued thread (its own established scope) shows no stale line.
             activeScopeLabel={