fix(i18n): translate the illness labels left in English

The illness screens showed "Weight", "Pulse", "Recovery" and "Day" in
English in German, French, Spanish, Italian and Polish: the four keys
had been copied from English into those catalogs, while their
neighbours were translated. The same copy left the medication wizard's
"Name" step in French, Spanish, Italian and Polish and the dashboard
layout's "Chart" column in German in English. A test now holds the
illness keys translated in every locale.

src/components/illness/__tests__/illness-labels-i18n.test.ts

@@ -0,0 +1,55 @@
+import { readFileSync } from "node:fs";
+import { join } from "node:path";
+
+import { describe, expect, it } from "vitest";
+
+import { resolveKey } from "@/lib/i18n/resolve-key";
+
+/**
+ * The illness screens name the vital that drives a recovery gap and label the
+ * day picker of the log sheet through these keys. They were once copied from
+ * English into five catalogs, so a German reader saw "Weight", "Pulse",
+ * "Recovery" and "Day" among translated neighbours. The English leak guard
+ * skips single words, so it cannot see this; the pin below can.
+ */
+const MESSAGES_DIR = join(__dirname, "../../../../messages");
+
+function catalog(locale: string): Record<string, unknown> {
+  return JSON.parse(
+    readFileSync(join(MESSAGES_DIR, `${locale}.json`), "utf8"),
+  ) as Record<string, unknown>;
+}
+
+const KEYS = [
+  "illness.vital.WEIGHT",
+  "illness.vital.PULSE",
+  "illness.vital.RECOVERY_SCORE",
+  "illness.sheet.day",
+] as const;
+
+const english = catalog("en");
+
+describe("illness labels", () => {
+  for (const locale of [
+    "de",
+    "fr",
+    "es",
+    "it",
+    "pl",
+    "nl",
+    "pt-BR",
+    "ko",
+    "ru",
+  ]) {
+    it(`are translated in ${locale}`, () => {
+      const messages = catalog(locale);
+      for (const key of KEYS) {
+        const value = resolveKey(messages, key);
+        expect(value, `${locale} ${key}`).toBeTruthy();
+        expect(value, `${locale} ${key} is still English`).not.toBe(
+          resolveKey(english, key),
+        );
+      }
+    });
+  }
+});