fix(parser): classify 9-16 as lower half

Author: linull24

app/scripts/selftest-jwxt-parsers.ts

@@ -9,6 +9,7 @@ import {
 	parseSelectionRoundTabs,
 	parseEnrollmentBreakdownHtml
 } from '../shared/jwxtCrawler';
+import { resolveParser } from '../src/lib/data/parsers';
 
 async function readFixture(relativePathFromRepoRoot: string): Promise<string> {
 	const __filename = fileURLToPath(import.meta.url);
@@ -48,6 +49,36 @@ async function main() {
 	assert.equal(breakdown.total, 18, 'breakdown total should parse');
 	assert.equal(breakdown.userBatchLabel, '其他已选人数', 'should capture ★ user batch label');
 
+	{
+		const parser = resolveParser('2025-2026 春');
+		assert.ok(parser, 'should resolve 2025Spring parser');
+		const raw = {
+			backendOrigin: 'selftest',
+			termName: '2025-2026 春',
+			updateTimeMs: Date.now(),
+			hash: 'selftest',
+			courses: [
+				{
+					courseId: 'C1',
+					courseName: '编译原理',
+					credit: '1',
+					teacherId: 'T1',
+					teacherName: 'Teacher',
+					classTime: '星期一第1节{第9-16周}',
+					campus: '宝山',
+					position: 'A-101',
+					capacity: '1',
+					number: '0',
+					limitations: [],
+					teachingClassId: 'S1'
+				}
+			]
+		};
+		const data = parser.parse(raw as any);
+		const slot = data.courses[0]!.sections[0]!.classtime[0]![0]!;
+		assert.equal(slot.weekPattern.span, '下半学期', '9-16 weeks should be 下半学期');
+	}
+
 	// eslint-disable-next-line no-console
 	console.log('[selftest] jwxt parsers ok');
 }

app/src/lib/data/parsers/2025Spring.ts

@@ -45,8 +45,9 @@ export const parser2025Spring: CourseParser = {
 			timezone: 'Asia/Shanghai'
 		};
 		const calendar = extendCalendar(baseCalendar, stats);
-		// 2025-16 is a 16-week term; this value affects upper/lower splitting for clip-path rendering.
-		const weeks = stats.maxWeek > 0 ? stats.maxWeek : 16;
+		// 2025-16 is a 16-week term; do NOT infer the term length from week tokens, as some entries may
+		// contain out-of-band numbers that would break half-term classification (e.g. 9-16 should be 下半学期).
+		const weeks = 16;
 
 		const courses = new Map<string, CourseRecord>();
 		const courseHashMap = new Map<string, string>();
@@ -315,14 +316,16 @@ function projectToMatrix(chunks: ScheduleChunk[], calendar: CalendarConfig, maxW
 
 function buildWeekPattern(descriptor: WeekDescriptor, maxWeeks: number): WeekPattern {
 	const weeks = expandWeeks(descriptor, maxWeeks);
-	const half = Math.ceil(maxWeeks / 2);
+	// SHU half-term convention: the "second half" starts at week floor(maxWeeks/2)+1.
+	// Example (16 weeks): upper = 1-8, lower = 9-16, so "9-16" should be 下半学期.
+	const secondHalfStart = Math.floor(maxWeeks / 2) + 1;
 
 	const span: WeekPattern['span'] =
 		!weeks || weeks.length === 0
 			? '全学期'
-			: weeks.every((week) => week <= half)
+			: weeks.every((week) => week < secondHalfStart)
 				? '上半学期'
-				: weeks.every((week) => week > half)
+				: weeks.every((week) => week >= secondHalfStart)
 					? '下半学期'
 					: '全学期';