fix: 输入校验忽略多个连续空格与大小写；统一中英文引号与空白规范化

kouyu_english/test/dialogue_task_test.dart

@@ -84,6 +84,25 @@ void main() {
       expect(dialogueTaskLabel(a0MeetDialogue, 9), '完成本轮任务');
     });
 
+    test('输入校验忽略多余空格与大小写', () {
+      expect(
+        matchesDialogueStage(a0MeetDialogue, 0, "   MY    NAME    IS    SHEN   "),
+        isTrue,
+      );
+      expect(
+        matchesDialogueStage(a0Dialogues["a0-02"]!, 1, "  S   H   E   N  "),
+        isTrue,
+      );
+      expect(
+        matchesDialogueStage(a0Dialogues["a0-04"]!, 0, "MY   NUMBER   IS   ONE-THREE-EIGHT"),
+        isTrue,
+      );
+      expect(
+        matchesDialogueStage(a0Dialogues["a0-08"]!, 2, "IT'S    THREE    O'CLOCK"),
+        isTrue,
+      );
+    });
+
     test('给 AI 的可用词表随课程递增且不越界', () {
       final first = taughtLanguageUpTo('a0-01');
       final later = taughtLanguageUpTo('a0-09');

kouyu_english/test/review_feedback_test.dart

@@ -79,4 +79,31 @@ void main() {
       isTrue,
     );
   });
+
+  test('ignores multiple spaces and casing across review items', () {
+    // Multi-space and uppercase on A0-P03
+    expect(
+      ReviewFeedback.check(
+        review('A0-P03', 'Nice to meet you.'),
+        '   NICE    TO    MEET    YOU!   ',
+      ).complete,
+      isTrue,
+    );
+    // Multi-space and uppercase on A0-P08
+    expect(
+      ReviewFeedback.check(
+        review('A0-P08', 'My number is ...'),
+        'MY   NUMBER   IS   ONE   TWO   THREE',
+      ).complete,
+      isTrue,
+    );
+    // Multi-space on word item
+    expect(
+      ReviewFeedback.check(
+        review('A0-W08', 'three'),
+        '   THREE   ',
+      ).complete,
+      isTrue,
+    );
+  });
 }

kouyu_english/test/writing_feedback_test.dart

@@ -31,4 +31,31 @@ void main() {
       isTrue,
     );
   });
+
+  test('ignores multiple spaces, mixed casing and curly apostrophes', () {
+    // a0-01 greeting and name with multiple spaces and uppercase
+    expect(
+      WritingFeedback.check('a0-01', '   HELLO   I   AM   ALEX   ').complete,
+      isTrue,
+    );
+    // a0-01 with curly quote and multiple spaces
+    expect(
+      WritingFeedback.check('a0-01', 'HI    I’M   MIA').complete,
+      isTrue,
+    );
+    // a0-07 with multiple spaces in phrase
+    expect(
+      WritingFeedback.check('a0-07', 'THIS    IS    MY    MOTHER').complete,
+      isTrue,
+    );
+    // a0-08-c with multiple spaces and curly apostrophe
+    expect(
+      WritingFeedback.check(
+        'a0-08-c',
+        'IT’S    THREE    O’CLOCK',
+        segmentId: 'a0-08-c',
+      ).complete,
+      isTrue,
+    );
+  });
 }