fix(schema): case the present label by its language only

page.locale accepts any string. A malformed tag such as "de-DE-" made toLocaleUpperCase throw a RangeError, so parseResumeData failed and the resume could not load. The language code always comes from the parser's word list, so it is a valid tag.

packages/schema/src/resume/dates.test.ts

@@ -96,6 +96,10 @@ describe("getPresentLabel", () => {
 		expect(getPresentLabel("de-DE")).toBe("Heute");
 		expect(getPresentLabel("xx-XX")).toBe("Present");
 	});
+
+	it("reads a malformed locale tag by its language instead of throwing", () => {
+		expect(getPresentLabel("de-DE-")).toBe("Heute");
+	});
 });
 
 describe("upgradeResumeDates", () => {

packages/schema/src/resume/dates.ts

@@ -55,7 +55,8 @@ export function getPresentLabel(locale: string): string {
 
 	const word = ONGOING_TOKENS_BY_LANGUAGE[language]?.[0];
 	if (!word) return "Present";
-	return word.charAt(0).toLocaleUpperCase(locale) + word.slice(1);
+	// Case the word by its language alone: `locale` can be a malformed tag ("de-DE-") that throws a RangeError.
+	return word.charAt(0).toLocaleUpperCase(language) + word.slice(1);
 }
 
 const toEndpoint = (value: YearMonth): PeriodEndpoint => {