fix(i18n): make the Korean locale actually work end to end

Registering `ko` in the `Locale` union left seven locale-keyed tables
without an entry, so the build could not type-check and the safety
screens, the citation-coverage grader and the reference-range parser
read nothing at all for a Korean reader.

Three failures were not missing keys but wrong assumptions:

- The shared fold decomposes with NFD and strips U+0300-U+036F. Latin
  accents become plain letters, but Hangul decomposes into jamo, which
  are not in that range and survived — so folded Korean text was a jamo
  sequence no precomposed table entry could ever match. It recomposes to
  NFC now; every Latin, Polish and German fold is byte-identical.
- `normaliseLabKey` kept `[a-z0-9]`, which reduced every Korean analyte
  name to the empty string, so the derived index held none of them and a
  Korean cholesterol result reached a FHIR export uncoded.
- The reference-range parser had the hyphen and the dashes but not the
  tilde a Korean lab actually prints (`3.5~5.0`).

The Korean safety banks carry no `\b` next to a Hangul token — `\b` is
an ASCII `\w` boundary and Hangul is not `\w`, so `/\b증량/` matches
nothing — and the clause order is the mirror of the Latin banks, since
Korean closes with the verb. The dose patterns require a target-marking
particle for the same reason the Latin banks require "to"/"by": without
it the permitted restatement "7.5mg을 복용 중이고, 체중은 내려가고
있어요" tripped the lowering pattern.

The Coach and Insights prompts route `ko` down the reviewed English body
plus a Korean reply directive; there is no `safety-contracts.ko.yaml`, so
the native builder has no Korean ground rules to compose from.

src/components/clinician/__tests__/clinician-view-locales.test.tsx

@@ -223,9 +223,9 @@ const FULL_RECORD = {
 const DOTTED_KEY = /\b[a-z][A-Za-z0-9]*(\.[A-Za-z0-9_]+){2,}\b/g;
 
 describe("<ClinicianView> resolves every label in every locale", () => {
-  it("covers all six shipped locales", () => {
+  it("covers all seven shipped locales", () => {
     // A floor: an empty locale list would make the loop below assert nothing.
-    expect(locales.length).toBe(6);
+    expect(locales.length).toBe(7);
   });
 
   for (const locale of locales) {

src/components/measurement-reminders/__tests__/type-labels-i18n.test.ts

@@ -41,13 +41,14 @@ const REQUIRED_KEYS = [
 ];
 
 describe("measurement-reminder + bulk-share dynamic i18n keys", () => {
-  it("discovers all six shipped locales", () => {
+  it("discovers all seven shipped locales", () => {
     expect(LOCALES.map((l) => l.locale).sort()).toEqual([
       "de",
       "en",
       "es",
       "fr",
       "it",
+      "ko",
       "pl",
     ]);
   });

src/components/settings/access/__tests__/managed-profile-affordances.test.tsx

@@ -276,7 +276,7 @@ describe("the managed-profile card, in the shared-access section", () => {
       /<select[^>]*data-slot="managed-profile-locale"[\s\S]*?<\/select>/
         .exec(html)?.[0]
         .match(/<option/g) ?? [];
-    expect(options).toHaveLength(6);
+    expect(options).toHaveLength(7);
   });
 
   it("lists the profiles this account looks after, and only those", () => {