chore(i18n): drop dead format.dateShort timeShort dateTime keys across six locales

The runtime never reads the format namespace — every locale-aware
formatter routes through Intl.DateTimeFormat directly via
src/lib/format-locale.ts. The keys were only verified by their own
ordering smoke test, which is also removed.

messages/de.json

@@ -33,11 +33,6 @@
     "showPassword": "Passwort anzeigen",
     "hidePassword": "Passwort verbergen"
   },
-  "format": {
-    "dateShort": "{day}.{month}.{year}",
-    "timeShort": "{hour}:{minute}",
-    "dateTime": "{day}.{month}.{year} {hour}:{minute}"
-  },
   "doctorReport": {
     "title": "Gesundheitsbericht",
     "subtitle": "HealthLog — Persönlicher Gesundheitsbericht",

messages/en.json

@@ -33,11 +33,6 @@
     "showPassword": "Show password",
     "hidePassword": "Hide password"
   },
-  "format": {
-    "dateShort": "{month}/{day}/{year}",
-    "timeShort": "{hour}:{minute}",
-    "dateTime": "{month}/{day}/{year} {hour}:{minute}"
-  },
   "doctorReport": {
     "title": "Health Report",
     "subtitle": "HealthLog — Personal Health Report",

messages/es.json

@@ -33,11 +33,6 @@
     "showPassword": "Mostrar contraseña",
     "hidePassword": "Ocultar contraseña"
   },
-  "format": {
-    "dateShort": "{day}/{month}/{year}",
-    "timeShort": "{hour}:{minute}",
-    "dateTime": "{day}/{month}/{year} {hour}:{minute}"
-  },
   "doctorReport": {
     "title": "Informe de salud",
     "subtitle": "HealthLog — Informe personal de salud",

messages/fr.json

@@ -33,11 +33,6 @@
     "showPassword": "Afficher le mot de passe",
     "hidePassword": "Masquer le mot de passe"
   },
-  "format": {
-    "dateShort": "{day}/{month}/{year}",
-    "timeShort": "{hour}:{minute}",
-    "dateTime": "{day}/{month}/{year} {hour}:{minute}"
-  },
   "doctorReport": {
     "title": "Rapport de santé",
     "subtitle": "HealthLog — Rapport personnel de santé",

messages/it.json

@@ -33,11 +33,6 @@
     "showPassword": "Mostra password",
     "hidePassword": "Nascondi password"
   },
-  "format": {
-    "dateShort": "{day}/{month}/{year}",
-    "timeShort": "{hour}:{minute}",
-    "dateTime": "{day}/{month}/{year} {hour}:{minute}"
-  },
   "doctorReport": {
     "title": "Rapporto sanitario",
     "subtitle": "HealthLog — Rapporto personale di salute",

messages/pl.json

@@ -33,11 +33,6 @@
     "showPassword": "Pokaż hasło",
     "hidePassword": "Ukryj hasło"
   },
-  "format": {
-    "dateShort": "{day}.{month}.{year}",
-    "timeShort": "{hour}:{minute}",
-    "dateTime": "{day}.{month}.{year} {hour}:{minute}"
-  },
   "doctorReport": {
     "title": "Raport zdrowotny",
     "subtitle": "HealthLog — Osobisty raport zdrowotny",

src/lib/i18n/__tests__/format-locale-order.test.ts

@@ -1,69 +0,0 @@
-/**
- * v1.4.27 B6 — `format.dateShort` / `timeShort` / `dateTime` ordering.
- *
- * Each shipped locale carries a `format.*` namespace that documents
- * its native date-pattern ordering as i18n strings. The actual
- * formatting still routes through `Intl.*` via
- * `src/lib/format-locale.ts`; the format keys exist so downstream
- * surfaces (PDF export, email templates, CSV docstrings) can render
- * the date hint without a JS context.
- *
- * This smoke test pins the ordering per locale so a copy-paste
- * regression that flips DD/MM to MM/DD on the French bundle would
- * fail fast.
- */
-import { readFileSync } from "node:fs";
-import { join } from "node:path";
-import { describe, expect, it } from "vitest";
-
-const MESSAGES = join(__dirname, "../../../../messages");
-
-function loadFormat(locale: string): {
-  dateShort: string;
-  timeShort: string;
-  dateTime: string;
-} {
-  const bundle = JSON.parse(
-    readFileSync(join(MESSAGES, `${locale}.json`), "utf8"),
-  );
-  const fmt = bundle.format as
-    | { dateShort?: string; timeShort?: string; dateTime?: string }
-    | undefined;
-  if (!fmt || !fmt.dateShort || !fmt.timeShort || !fmt.dateTime) {
-    throw new Error(`Locale ${locale} is missing the format namespace`);
-  }
-  return fmt as { dateShort: string; timeShort: string; dateTime: string };
-}
-
-describe("locale-native format ordering", () => {
-  it("DE renders day-month-year with dot separators", () => {
-    const fmt = loadFormat("de");
-    expect(fmt.dateShort).toBe("{day}.{month}.{year}");
-    expect(fmt.dateTime).toBe("{day}.{month}.{year} {hour}:{minute}");
-    expect(fmt.timeShort).toBe("{hour}:{minute}");
-  });
-
-  it("EN renders month-day-year with slash separators", () => {
-    const fmt = loadFormat("en");
-    expect(fmt.dateShort).toBe("{month}/{day}/{year}");
-    expect(fmt.dateTime).toBe("{month}/{day}/{year} {hour}:{minute}");
-    expect(fmt.timeShort).toBe("{hour}:{minute}");
-  });
-
-  it.each([["fr"], ["es"], ["it"]])(
-    "%s renders day-month-year with slash separators (native ordering)",
-    (locale) => {
-      const fmt = loadFormat(locale);
-      expect(fmt.dateShort).toBe("{day}/{month}/{year}");
-      expect(fmt.dateTime).toBe("{day}/{month}/{year} {hour}:{minute}");
-      expect(fmt.timeShort).toBe("{hour}:{minute}");
-    },
-  );
-
-  it("PL renders day-month-year with dot separators (native ordering)", () => {
-    const fmt = loadFormat("pl");
-    expect(fmt.dateShort).toBe("{day}.{month}.{year}");
-    expect(fmt.dateTime).toBe("{day}.{month}.{year} {hour}:{minute}");
-    expect(fmt.timeShort).toBe("{hour}:{minute}");
-  });
-});