Portal: add reusable 12-hour TimeInput component

TimeInput displays and accepts AM/PM times, offers the 5-minute options as
suggestions, and allows typing any minute 00-59; its value model is a 24h
HH:MM string. Adds isomorphic parseTimeInput/hmToMinutes/fiveMinuteOptions
helpers and unit + component tests for them.

src/lib/schedule-utils.spec.ts

@@ -3,8 +3,11 @@ import {
 	blockDuration,
 	blockSegments,
 	findOverlap,
+	fiveMinuteOptions,
 	formatTime,
+	hmToMinutes,
 	isOvernight,
+	parseTimeInput,
 	snapMinutes,
 	toHm,
 	validateBlock,
@@ -44,6 +47,52 @@ describe('toHm', () => {
 	});
 });
 
+describe('hmToMinutes', () => {
+	it('parses 24-hour HH:MM strings', () => {
+		expect(hmToMinutes('00:00')).toBe(0);
+		expect(hmToMinutes('07:05')).toBe(7 * 60 + 5);
+		expect(hmToMinutes('23:59')).toBe(23 * 60 + 59);
+	});
+
+	it('rejects malformed or out-of-range values', () => {
+		expect(hmToMinutes('7:05')).toBeNull();
+		expect(hmToMinutes('24:00')).toBeNull();
+		expect(hmToMinutes('12:60')).toBeNull();
+		expect(hmToMinutes('')).toBeNull();
+	});
+});
+
+describe('parseTimeInput', () => {
+	it('parses tolerant 12-hour input', () => {
+		expect(parseTimeInput('7:05 pm')).toEqual({ ok: true, minutes: 19 * 60 + 5 });
+		expect(parseTimeInput('7:05PM')).toEqual({ ok: true, minutes: 19 * 60 + 5 });
+		expect(parseTimeInput('7pm')).toEqual({ ok: true, minutes: 19 * 60 });
+		expect(parseTimeInput('7:7')).toEqual({ ok: true, minutes: 7 * 60 + 7 });
+		expect(parseTimeInput('12:00 am')).toEqual({ ok: true, minutes: 0 });
+		expect(parseTimeInput('12:30 PM')).toEqual({ ok: true, minutes: 12 * 60 + 30 });
+		expect(parseTimeInput('11:59 pm')).toEqual({ ok: true, minutes: 23 * 60 + 59 });
+		expect(parseTimeInput('0:30')).toEqual({ ok: true, minutes: 30 });
+	});
+
+	it('rejects ambiguous or out-of-range input', () => {
+		expect(parseTimeInput('13:00 PM').ok).toBe(false);
+		expect(parseTimeInput('7:70').ok).toBe(false);
+		expect(parseTimeInput('25:00').ok).toBe(false);
+		expect(parseTimeInput('').ok).toBe(false);
+		expect(parseTimeInput('noon').ok).toBe(false);
+	});
+});
+
+describe('fiveMinuteOptions', () => {
+	it('lists every 5-minute step across the day', () => {
+		const options = fiveMinuteOptions();
+		expect(options[0]).toBe(0);
+		expect(options[1]).toBe(5);
+		expect(options[options.length - 1]).toBe(23 * 60 + 55);
+		expect(options).toHaveLength((24 * 60) / 5);
+	});
+});
+
 describe('snapMinutes', () => {
 	it('rounds to the nearest 15 minutes and clamps to the day', () => {
 		expect(snapMinutes(0)).toBe(0);