Adjust subject label shortening to keep prefix before hyphen

Author: alvin000009238

frontend/dashboard.js

@@ -267,17 +267,11 @@ function getScoreClass(score) {
     return 'low';
 }
 
-// 縮短科目名稱
-export function shortenName(name) {
-    const shortNames = {
-        '英語文': '英文',
-        '公民與社會': '公民',
-        '選修化學-物質與能量': '化學',
-        '選修物理-力學一': '物理',
-        '選修化學': '化學',
-        '選修物理': '物理'
-    };
-    return shortNames[name] || name;
+// 縮短科目名稱（僅保留 '-' 前的文字）
+export function shortenName(name = '') {
+    const cleanedName = cleanSubjectName(String(name));
+    const [baseName] = cleanedName.split('-');
+    return baseName.trim() || cleanedName;
 }
 
 // 生成五標表格

tests/frontend/dashboard.test.js

@@ -17,13 +17,14 @@ describe('dashboard.js', () => {
     });
 
     describe('shortenName', () => {
-        it('should shorten known subjects', () => {
-            assert.equal(shortenName('英語文'), '英文');
-            assert.equal(shortenName('選修化學-物質與能量'), '化學');
+        it('should keep only the text before hyphen', () => {
+            assert.equal(shortenName('選修化學-物質構造與反應速率'), '選修化學');
+            assert.equal(shortenName('選修物理-力學二與熱學'), '選修物理');
         });
 
-        it('should return original name if unknown', () => {
+        it('should return original name when no hyphen exists', () => {
             assert.equal(shortenName('數學A'), '數學A');
+            assert.equal(shortenName('英語文'), '英語文');
         });
     });
 });