fix(import): match the molar-mass annotation by the shape Apple writes

The catch-all angle-bracket pattern read as an HTML sanitiser to static analysis. The annotation Apple writes is a number, so the pattern now matches exactly that, and a unit with anything else between the brackets stays unknown instead of being silently trimmed into a lookup.

src/lib/measurements/__tests__/hk-units.test.ts

@@ -30,6 +30,8 @@ describe("convertHkValue", () => {
       99.0858,
       4,
     );
+    expect(isConvertibleHkUnit("mmol<180>/L")).toBe(true);
+    expect(isConvertibleHkUnit("mmol<x>/L")).toBe(false);
   });
 
   it("keeps the small calorie apart from the large one", () => {

src/lib/measurements/hk-units.ts

@@ -120,10 +120,12 @@ const HK_UNITS: Record<string, HkUnitSpec> = {
 
 /**
  * Apple writes molar units with the substance's molar mass inline —
- * `mmol<180.156>/L` for blood glucose. The annotation is informational;
- * strip it so the lookup sees the plain unit.
+ * `mmol<180.156>/L` for blood glucose. The annotation is a number and
+ * informational; strip exactly that shape so the lookup sees the plain
+ * unit. Anything else between angle brackets is not a unit Apple writes
+ * and stays unknown.
  */
-const MOLAR_MASS_ANNOTATION = /<[^>]*>/g;
+const MOLAR_MASS_ANNOTATION = /<\d+(?:\.\d+)?>/g;
 
 function normaliseUnitString(unit: string): string {
   return unit.trim().replace(MOLAR_MASS_ANNOTATION, "");