fix: import unpublished exam rooms and add opt-in school HTML feedback

mobile/test/features/feedback_http_sender_test.dart

@@ -33,6 +33,31 @@ class FakeFeedbackHttpTransport implements FeedbackHttpTransport {
 }
 
 void main() {
+  test('HTML diagnostics use independent attachment field with an immutable payload', () async {
+    final transport = FakeFeedbackHttpTransport();
+    final html = Uint8List.fromList(
+      utf8.encode('<!doctype html><!-- TPSchedule school diagnostic -->'),
+    );
+    final submission = FeedbackSubmission.problem(
+      id: 'same-id',
+      message: '无法导入',
+      diagnosticHtml: html,
+    );
+    html.fillRange(0, html.length, 0);
+    await HttpFeedbackSender(
+      endpoint: 'https://example.com/v1/feedback',
+      transport: transport,
+    ).send(submission);
+    final body = utf8.decode(transport.body!);
+    expect(
+      body,
+      contains(
+        'name="diagnostic_html"; filename="TPSchedule-school-page.html"',
+      ),
+    );
+    expect(body, contains('TPSchedule school diagnostic'));
+    expect(submission.attachments, isEmpty);
+  });
   test(
     'old feedback service gets a specific diagnostic-upgrade hint',
     () async {

mobile/test/features/feedback_test.dart

@@ -1,10 +1,12 @@
 import 'dart:async';
 import 'dart:typed_data';
+import 'dart:convert';
 
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:hepan_everyday/features/feedback/feedback_page.dart';
 import 'package:hepan_everyday/features/feedback/feedback_submission.dart';
+import 'package:hepan_everyday/services/school_page_diagnostic.dart';
 
 class RecordingSender implements FeedbackSender {
   final submissions = <FeedbackSubmission>[];
@@ -35,6 +37,47 @@ Future<void> reveal(
 }
 
 void main() {
+  testWidgets('HTML is opt in, confirmed, and stays identical on retry', (
+    tester,
+  ) async {
+    final store = SchoolPageDiagnostic.instance;
+    addTearDown(store.clear);
+    store.remember(
+      '<input name="semester.id" value="523"><table id="manualArrangeCourseTable"><tr><td>课程内容</td></tr></table>',
+      Uri.parse('https://eams.uestc.edu.cn/eams/courseTableForStd.action'),
+    );
+    final sender = RecordingSender()..fail = true;
+    await tester.pumpWidget(MaterialApp(home: FeedbackPage(sender: sender)));
+    await tester.enterText(find.byKey(const Key('feedback-message')), '不能导入');
+    await reveal(tester, find.byKey(const Key('feedback-html')));
+    expect(
+      tester
+          .widget<CheckboxListTile>(find.byKey(const Key('feedback-html')))
+          .value,
+      isFalse,
+    );
+    await tester.tap(find.byKey(const Key('feedback-logs')));
+    await tester.pump();
+    await tester.tap(find.byKey(const Key('feedback-html')));
+    await tester.pumpAndSettle();
+    expect(find.text('附带网页排查资料？'), findsOneWidget);
+    await tester.tap(find.text('同意附带'));
+    await tester.pumpAndSettle();
+    await reveal(tester, find.byKey(const Key('feedback-submit')));
+    await tester.tap(find.byKey(const Key('feedback-submit')));
+    await tester.pumpAndSettle();
+    expect(
+      utf8.decode(sender.submissions.single.diagnosticHtml!),
+      contains('课程内容'),
+    );
+    store.clear();
+    await tester.tap(find.byKey(const Key('feedback-submit')));
+    await tester.pumpAndSettle();
+    expect(
+      identical(sender.submissions.first, sender.submissions.last),
+      isTrue,
+    );
+  });
   testWidgets('logs are opt in and included only when checked', (tester) async {
     final sender = RecordingSender();
     await tester.pumpWidget(MaterialApp(home: FeedbackPage(sender: sender)));
@@ -52,6 +95,7 @@ void main() {
     await tester.tap(find.byKey(const Key('feedback-submit')));
     await tester.pumpAndSettle();
     expect(sender.submissions.single.diagnosticLog, isNotNull);
+    expect(sender.submissions.single.diagnosticHtml, isNull);
     expect(sender.submissions.single.attachments, isEmpty);
   });
   testWidgets('uncertain delivery retains original payload for status check', (
@@ -186,6 +230,8 @@ void main() {
       backwards: true,
     );
     await tester.enterText(find.byKey(const Key('feedback-message')), ' 建议内容 ');
+    // Validation removes the error label after the tap, changing list height.
+    await tester.pumpAndSettle();
     await reveal(tester, find.byKey(const Key('feedback-submit')));
     await tester.tap(find.byKey(const Key('feedback-submit')));
     await tester.pumpAndSettle();