feat(i18n): add Brazilian Portuguese support to medication and insight flows

Add pt-BR locale coverage across medication extraction, coach prose
grounding, no-key insight fallbacks, coach read dates, and lab reference
range parsing.

- Accept pt-BR natively in NaturalLanguageExtractorProps.
- Add Brazilian Portuguese population-norm framing patterns.
- Add pt-BR no-assessment fallback copy for all insight floors.
- Add pt-BR expected date coverage to the Coach read strip test.
- Add pt-BR lab range prose vocabulary.
- Keep existing locale behavior and safety-contract coverage unchanged.

src/components/insights/derived/__tests__/coach-read-strip-latest-date.test.tsx

@@ -91,6 +91,7 @@ describe("CoachReadStrip — the latest reading's day", () => {
       it: "1 ottobre",
       ko: "10월 1일",
       pl: "1 października",
+      "pt-BR": "1 de outubro",
     };
     for (const [locale, date] of Object.entries(expected) as Array<
       [Locale, string]

src/components/medications/scheduling/natural-language-extractor.tsx

@@ -41,6 +41,7 @@
  * button is the open-trigger.
  */
 
+import type { Locale } from "@/lib/i18n/config";
 import { useCallback, useId, useRef, useState } from "react";
 import { Loader2, Sparkles } from "lucide-react";
 
@@ -72,7 +73,7 @@ export interface NaturalLanguageExtractorProps {
    * UI locale forwarded to the route as a hint. The route accepts an
    * undefined value and falls back to the resolver chain.
    */
-  locale?: "en" | "de" | "es" | "fr" | "it" | "pl" | "ko";
+  locale?: Locale;
   /**
    * Optional override of the API path so the wizard test harness can
    * point at a mock server. Defaults to the production route.

src/lib/ai/coach/coach-prose-grounding.ts

@@ -870,6 +870,15 @@ const POPULATION_NORM_PATTERNS: Record<Locale, readonly RegExp[]> = {
   ], // No `\b` next to Hangul (it is an ASCII \w boundary), and the object sits
   // between subject and verb in Korean, so each entry allows a gap where the
   // Latin banks put \s+.
+  "pt-BR": [
+    /\bfaixa\s+(?:de\s+refer[eê]ncia|normal)\b/i,
+    /\bvalor(?:es)?\s+de\s+refer[eê]ncia\b/i,
+    /\b(?:adultos?|pessoas?)\s+saud[áa]ve(?:l|is)\b/i,
+    /\bmaioria\s+(?:dos\s+)?(?:adultos?|das\s+pessoas)\b/i,
+    /\b(?:diretrizes|guias|m[eé]dicos?|especialistas?)\b[^.?!]{0,30}\b(?:recomend(?:am|a)|suger(?:em|e)|indic(?:am|a))\b/i,
+    /\b(?:adultos?|pessoas?)\b[^.?!]{0,30}\b(?:geralmente|normalmente|em\s+geral)\b[^.?!]{0,30}\b(?:precis(?:am|a)|devem|necessit(?:am|a))\b/i,
+    /\b(?:entre|de)\s+[^.?!]{0,30}\b(?:normalmente|geralmente|em\s+geral)\b/i,
+  ],
   ko: [
     /정상\s*범위(?:는|가|를|로|의)/,
     /(?:참고|기준|권장)\s*(?:범위|치|값)/,

src/lib/insights/eval/__tests__/tone-harness.test.ts

@@ -254,6 +254,7 @@ describe("tone harness — deterministic fallbacks", () => {
     es: /no hay ninguna valoración/,
     it: /non è disponibile alcuna valutazione/,
     pl: /nie ma (?:tu )?żadnej oceny/,
+    "pt-BR": /n[aã]o h[áa] (?:uma )?avalia[çc][aã]o/i,
     ko: /평가가 없어요/,
   };
 

src/lib/labs/parse-reference-range.ts

@@ -263,6 +263,30 @@ export const RANGE_PROSE: Record<Locale, RangeProse> = {
   // matchers here are prefix-anchored, so only the prefix-shaped notation is
   // listed. A postfixed Korean range still falls through to text-only, which
   // `isUnreadableRange` reports rather than hides.
+  "pt-BR": {
+    twoSided: ["a", "e"],
+    upper: [
+      "ate",
+      "menos de",
+      "abaixo de",
+      "inferior a",
+      "maximo",
+      "no maximo",
+    ],
+    lower: [
+      "a partir de",
+      "no minimo",
+      "minimo",
+      "acima de",
+      "maior que",
+      "maior de",
+    ],
+    filler: [
+      "valores de referencia",
+      "valor de referencia",
+      "faixa de referencia",
+    ],
+  },
   ko: {
     twoSided: ["에서", "부터"],
     upper: ["최대", "최고"],