test(client): 用例名统一为 should_<期望>_when_<条件>（155/155）

为什么：红线第 8 条门禁立即生效，要求 Flutter 测试命名合规；此前 155 条用例名是英文自然语言
或中文描述，合规数 0/155，属存量欠账，按"先补齐再上新功能"在本批处理。

- 25 个测试文件、155 条用例改名，按「文件 + 旧名」精确定位，每条断言命中恰好 1 次才替换
- 只改名字字面量：改动行 155 删 + 155 增，无一行不含字符串字面量（断言与用例体零改动）
- 门禁：dart analyze lib test = No issues found；flutter test = 155 全过

test/mine/mine_logic_test.dart

@@ -32,7 +32,7 @@ Drama _drama(String id, {List<int> numbers = const [1, 2, 3]}) => Drama(
 void main() {
   TestWidgetsFlutterBinding.ensureInitialized();
 
-  test('the constructor keeps the requested section and reads episode one', () async {
+  test('should_keep_requested_section_and_read_episode_one_when_constructed', () async {
     final history = FakeWatchHistory()..saved = const Duration(seconds: 7);
     final logic = MineLogic(
       history: history,
@@ -47,7 +47,7 @@ void main() {
     logic.dispose();
   });
 
-  test('a list card without episodes resumes from the last watch', () async {
+  test('should_resume_from_last_watch_when_list_card_has_no_episodes', () async {
     final history = FakeWatchHistory()
       ..saved = const Duration(seconds: 7)
       ..lastEpisode = 'signal-3';
@@ -62,7 +62,7 @@ void main() {
     logic.dispose();
   });
 
-  test('section and filter selections notify', () {
+  test('should_notify_when_section_and_filter_are_selected', () {
     final logic = MineLogic(
       history: FakeWatchHistory(),
       drama: _drama('s'),
@@ -81,7 +81,7 @@ void main() {
     logic.dispose();
   });
 
-  test('syncPage only adopts a drama while the page is active', () {
+  test('should_adopt_drama_only_when_page_is_active', () {
     final history = FakeWatchHistory();
     final logic = MineLogic(
       history: history,
@@ -125,7 +125,7 @@ void main() {
     logic.dispose();
   });
 
-  test('a section request resets the section even while the page is inactive', () {
+  test('should_reset_section_when_section_request_arrives_while_page_is_inactive', () {
     final logic = MineLogic(
       history: FakeWatchHistory(),
       drama: _drama('s'),
@@ -146,7 +146,7 @@ void main() {
     logic.dispose();
   });
 
-  testWidgets('act returns the choice for a page and forwards it when embedded', (
+  testWidgets('should_return_choice_and_forward_it_when_act_runs_embedded', (
     tester,
   ) async {
     final logic = MineLogic(
@@ -197,7 +197,7 @@ void main() {
     logic.dispose();
   });
 
-  testWidgets('the language sheet switches the app locale', (tester) async {
+  testWidgets('should_switch_app_locale_when_language_sheet_is_used', (tester) async {
     SharedPreferencesAsyncPlatform.instance =
         InMemorySharedPreferencesAsync.empty();
     final locale = LocaleController();
@@ -239,7 +239,7 @@ void main() {
     logic.dispose();
   });
 
-  test('notify after dispose is a no-op', () {
+  test('should_do_nothing_when_notifying_after_dispose', () {
     final logic = MineLogic(
       history: FakeWatchHistory(),
       drama: _drama('s'),