feat: 添加 M4A 文件验证和音频播放错误处理

- 在 `MeetingAudioUploadSupport` 中添加 M4A 文件验证逻辑，确保文件可播放
- 更新前端 `MeetingPreview.tsx` 和 `MeetingDetail.tsx` 以处理音频播放错误，并显示相应的警告信息
- 在 `WebMvcConfig` 中配置 M4A 媒

backend/src/main/java/com/imeeting/config/WebMvcConfig.java

@@ -2,6 +2,8 @@ package com.imeeting.config;
 
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.http.MediaType;
+import org.springframework.web.servlet.config.annotation.ContentNegotiationConfigurer;
 import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
 
@@ -16,6 +18,11 @@ public class WebMvcConfig implements WebMvcConfigurer {
     @Value("${unisbase.app.resource-prefix}")
     private String resourcePrefix;
 
+    @Override
+    public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
+        configurer.mediaType("m4a", MediaType.parseMediaType("audio/mp4"));
+    }
+
     @Override
     public void addResourceHandlers(ResourceHandlerRegistry registry) {
         // 确保目录存在

backend/src/main/java/com/imeeting/controller/android/AndroidMeetingRealtimeController.java

@@ -85,6 +85,7 @@ public class AndroidMeetingRealtimeController {
                 command == null ? null : command.getEnableItn(),
                 command == null ? null : command.getEnableTextRefine(),
                 command == null ? null : command.getSaveAudio(),
+                null,
                 command == null ? null : command.getHotWords()
         );
         CreateRealtimeMeetingCommand createCommand = buildCreateCommand(command, authContext, runtimeProfile);

backend/src/main/java/com/imeeting/dto/biz/CreateMeetingCommand.java

@@ -35,6 +35,8 @@ public class CreateMeetingCommand {
     @NotNull(message = "promptId must not be null")
     private Long promptId;
 
+    private Long hotWordGroupId;
+
     @Size(max = 2000, message = "userPrompt length must be <= 2000")
     private String userPrompt;
 

backend/src/main/java/com/imeeting/dto/biz/CreateRealtimeMeetingCommand.java

@@ -32,6 +32,8 @@ public class CreateRealtimeMeetingCommand {
     @NotNull(message = "promptId must not be null")
     private Long promptId;
 
+    private Long hotWordGroupId;
+
     @Size(max = 2000, message = "userPrompt length must be <= 2000")
     private String userPrompt;
 

backend/src/main/java/com/imeeting/service/android/legacy/impl/LegacyMeetingAdapterServiceImpl.java

@@ -137,6 +137,7 @@ public class LegacyMeetingAdapterServiceImpl implements LegacyMeetingAdapterServ
                 null,
                 null,
                 null,
+                null,
                 List.of()
         );
 

backend/src/main/java/com/imeeting/service/biz/MeetingRuntimeProfileResolver.java

@@ -16,5 +16,6 @@ public interface MeetingRuntimeProfileResolver {
                                           Boolean enableItn,
                                           Boolean enableTextRefine,
                                           Boolean saveAudio,
+                                          Long hotWordGroupId,
                                           List<String> hotWords);
 }

backend/src/main/java/com/imeeting/service/biz/impl/MeetingAudioUploadSupport.java

@@ -10,11 +10,14 @@ import org.springframework.web.multipart.MultipartFile;
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.nio.ByteBuffer;
+import java.nio.channels.SeekableByteChannel;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.nio.file.StandardCopyOption;
+import java.nio.file.StandardOpenOption;
 import java.util.Locale;
 import java.util.Set;
 import java.util.UUID;
@@ -31,6 +34,8 @@ public class MeetingAudioUploadSupport {
     private static final Set<String> WAV_MIME_TYPES = Set.of("audio/wav", "audio/x-wav", "audio/wave", "audio/vnd.wave");
     private static final Set<String> MP3_MIME_TYPES = Set.of("audio/mpeg", "audio/mp3", "audio/x-mp3", "audio/x-mpeg");
     private static final Set<String> M4A_MIME_TYPES = Set.of("audio/mp4", "audio/m4a", "audio/x-m4a", "audio/aac", "video/mp4");
+    private static final Set<String> PLAYABLE_M4A_SAMPLE_ENTRY_TYPES = Set.of("mp4a");
+    private static final Set<String> MP4_CONTAINER_TYPES = Set.of("moov", "trak", "mdia", "minf", "stbl");
 
     @Value("${unisbase.app.upload-path}")
     private String uploadPath;
@@ -52,9 +57,15 @@ public class MeetingAudioUploadSupport {
 
         String storedFileName = UUID.randomUUID() + "." + extension;
         Path targetPath = stagingDir.resolve(storedFileName);
+        try {
             try (InputStream inputStream = file.getInputStream()) {
                 Files.copy(inputStream, targetPath, StandardCopyOption.REPLACE_EXISTING);
             }
+            validateStoredAudio(targetPath, extension);
+        } catch (Exception ex) {
+            Files.deleteIfExists(targetPath);
+            throw ex;
+        }
         return buildStagingAudioToken(storedFileName);
     }
 
@@ -198,4 +209,121 @@ public class MeetingAudioUploadSupport {
         }
         return new String(header, startInclusive, endExclusive - startInclusive, StandardCharsets.US_ASCII);
     }
+
+    private void validateStoredAudio(Path audioPath, String extension) throws IOException {
+        if (!"m4a".equals(extension)) {
+            return;
+        }
+        String sampleEntryType = resolveM4aSampleEntryType(audioPath);
+        if (!StringUtils.hasText(sampleEntryType)) {
+            throw new RuntimeException("当前 m4a 文件未找到可识别的音频轨道，无法在网页中播放，请转为 mp3、wav 或 AAC 编码的 m4a 后重试");
+        }
+        if (!PLAYABLE_M4A_SAMPLE_ENTRY_TYPES.contains(sampleEntryType)) {
+            throw new RuntimeException("当前 m4a 文件音频编码为 " + sampleEntryType + "，浏览器通常只支持 AAC（mp4a）编码，请转为 mp3、wav 或 AAC 编码的 m4a 后重试");
+        }
+    }
+
+    private String resolveM4aSampleEntryType(Path audioPath) throws IOException {
+        try (SeekableByteChannel channel = Files.newByteChannel(audioPath, StandardOpenOption.READ)) {
+            return findM4aSampleEntryType(channel, 0, channel.size());
+        }
+    }
+
+    private String findM4aSampleEntryType(SeekableByteChannel channel, long start, long end) throws IOException {
+        long position = start;
+        while (position + 8 <= end) {
+            Mp4AtomHeader header = readAtomHeader(channel, position, end);
+            if (header == null || header.endPosition() <= position) {
+                return null;
+            }
+            if ("stsd".equals(header.type())) {
+                return readSampleEntryType(channel, header.payloadPosition(), header.endPosition());
+            }
+            if (MP4_CONTAINER_TYPES.contains(header.type())) {
+                String nestedType = findM4aSampleEntryType(channel, header.payloadPosition(), header.endPosition());
+                if (StringUtils.hasText(nestedType)) {
+                    return nestedType;
+                }
+            }
+            position = header.endPosition();
+        }
+        return null;
+    }
+
+    private Mp4AtomHeader readAtomHeader(SeekableByteChannel channel, long position, long parentEnd) throws IOException {
+        ByteBuffer buffer = ByteBuffer.allocate(16);
+        if (!readFully(channel, buffer, position, 8)) {
+            return null;
+        }
+        long size = Integer.toUnsignedLong(buffer.getInt());
+        String type = readFourCc(buffer);
+        long headerLength = 8;
+        if (size == 1) {
+            if (!readFully(channel, buffer, position + 8, 8)) {
+                return null;
+            }
+            size = buffer.getLong();
+            headerLength = 16;
+        } else if (size == 0) {
+            size = parentEnd - position;
+        }
+        if (size < headerLength) {
+            return null;
+        }
+        long endPosition = position + size;
+        if (endPosition > parentEnd) {
+            return null;
+        }
+        return new Mp4AtomHeader(type, position + headerLength, endPosition);
+    }
+
+    private String readSampleEntryType(SeekableByteChannel channel, long payloadStart, long atomEnd) throws IOException {
+        if (payloadStart + 8 > atomEnd) {
+            return null;
+        }
+        ByteBuffer stsdHeader = ByteBuffer.allocate(8);
+        if (!readFully(channel, stsdHeader, payloadStart, 8)) {
+            return null;
+        }
+        long entryCount = Integer.toUnsignedLong(stsdHeader.getInt(4));
+        long entryPosition = payloadStart + 8;
+        for (long index = 0; index < entryCount && entryPosition + 8 <= atomEnd; index++) {
+            ByteBuffer entryHeader = ByteBuffer.allocate(8);
+            if (!readFully(channel, entryHeader, entryPosition, 8)) {
+                return null;
+            }
+            long entrySize = Integer.toUnsignedLong(entryHeader.getInt());
+            String entryType = readFourCc(entryHeader);
+            if (entrySize < 8) {
+                return null;
+            }
+            if (StringUtils.hasText(entryType)) {
+                return entryType;
+            }
+            entryPosition += entrySize;
+        }
+        return null;
+    }
+
+    private boolean readFully(SeekableByteChannel channel, ByteBuffer buffer, long position, int length) throws IOException {
+        buffer.clear();
+        buffer.limit(length);
+        channel.position(position);
+        while (buffer.hasRemaining()) {
+            if (channel.read(buffer) < 0) {
+                return false;
+            }
+        }
+        buffer.flip();
+        return true;
+    }
+
+    private String readFourCc(ByteBuffer buffer) {
+        byte[] typeBytes = new byte[4];
+        buffer.get(typeBytes);
+        return new String(typeBytes, StandardCharsets.US_ASCII);
+    }
+
+    private record Mp4AtomHeader(String type, long payloadPosition, long endPosition) {
+    }
 }

backend/src/main/java/com/imeeting/service/biz/impl/MeetingCommandServiceImpl.java

@@ -627,6 +627,7 @@ public class MeetingCommandServiceImpl implements MeetingCommandService {
                 null,
                 command.getEnableTextRefine(),
                 null,
+                command.getHotWordGroupId(),
                 command.getHotWords()
         );
     }
@@ -644,6 +645,7 @@ public class MeetingCommandServiceImpl implements MeetingCommandService {
                 command.getEnableItn(),
                 command.getEnableTextRefine(),
                 command.getSaveAudio(),
+                command.getHotWordGroupId(),
                 command.getHotWords()
         );
     }

backend/src/main/java/com/imeeting/service/biz/impl/MeetingRuntimeProfileResolverImpl.java

@@ -2,6 +2,7 @@ package com.imeeting.service.biz.impl;
 
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.imeeting.dto.biz.AiModelVO;
+import com.imeeting.dto.biz.HotWordGroupVO;
 import com.imeeting.dto.biz.RealtimeMeetingRuntimeProfile;
 import com.imeeting.entity.biz.HotWord;
 import com.imeeting.entity.biz.AsrModel;
@@ -10,6 +11,7 @@ import com.imeeting.entity.biz.PromptTemplate;
 import com.imeeting.mapper.biz.AsrModelMapper;
 import com.imeeting.mapper.biz.LlmModelMapper;
 import com.imeeting.service.biz.AiModelService;
+import com.imeeting.service.biz.HotWordGroupService;
 import com.imeeting.service.biz.HotWordService;
 import com.imeeting.service.biz.MeetingRuntimeProfileResolver;
 import com.imeeting.service.biz.PromptTemplateService;
@@ -25,6 +27,7 @@ public class MeetingRuntimeProfileResolverImpl implements MeetingRuntimeProfileR
 
     private final AiModelService aiModelService;
     private final PromptTemplateService promptTemplateService;
+    private final HotWordGroupService hotWordGroupService;
     private final HotWordService hotWordService;
     private final AsrModelMapper asrModelMapper;
     private final LlmModelMapper llmModelMapper;
@@ -41,6 +44,7 @@ public class MeetingRuntimeProfileResolverImpl implements MeetingRuntimeProfileR
                                                  Boolean enableItn,
                                                  Boolean enableTextRefine,
                                                  Boolean saveAudio,
+                                                 Long hotWordGroupId,
                                                  List<String> hotWords) {
         long resolvedTenantId = tenantId == null ? 0L : tenantId;
         AiModelVO asrModel = resolveModel("ASR", asrModelId, resolvedTenantId);
@@ -54,7 +58,7 @@ public class MeetingRuntimeProfileResolverImpl implements MeetingRuntimeProfileR
         profile.setResolvedSummaryModelName(summaryModel.getModelName());
         profile.setResolvedPromptId(promptTemplate.getId());
         profile.setResolvedPromptName(promptTemplate.getTemplateName());
-        profile.setResolvedHotWordGroupId(resolveHotWordGroupId(promptTemplate, hotWords));
+        profile.setResolvedHotWordGroupId(resolveHotWordGroupId(resolvedTenantId, promptTemplate, hotWordGroupId, hotWords));
         profile.setResolvedMode(nonBlank(mode, "2pass"));
         profile.setResolvedLanguage(nonBlank(language, "auto"));
         profile.setResolvedUseSpkId(useSpkId != null ? useSpkId : 1);
@@ -62,11 +66,18 @@ public class MeetingRuntimeProfileResolverImpl implements MeetingRuntimeProfileR
         profile.setResolvedEnableItn(enableItn != null ? enableItn : Boolean.TRUE);
         profile.setResolvedEnableTextRefine(Boolean.TRUE.equals(enableTextRefine));
         profile.setResolvedSaveAudio(Boolean.TRUE.equals(saveAudio));
-        profile.setResolvedHotWords(resolveHotWords(promptTemplate, hotWords));
+        profile.setResolvedHotWords(resolveHotWords(resolvedTenantId, promptTemplate, hotWordGroupId, hotWords));
         return profile;
     }
 
-    private Long resolveHotWordGroupId(PromptTemplate promptTemplate, List<String> hotWords) {
+    private Long resolveHotWordGroupId(Long tenantId, PromptTemplate promptTemplate, Long hotWordGroupId, List<String> hotWords) {
+        if (hotWordGroupId != null) {
+            if (hotWordGroupId <= 0) {
+                return null;
+            }
+            assertHotWordGroupAvailable(hotWordGroupId, tenantId);
+            return hotWordGroupId;
+        }
         List<String> normalized = normalizeHotWords(hotWords);
         if (!normalized.isEmpty()) {
             return null;
@@ -74,7 +85,20 @@ public class MeetingRuntimeProfileResolverImpl implements MeetingRuntimeProfileR
         return promptTemplate == null ? null : promptTemplate.getHotWordGroupId();
     }
 
-    private List<String> resolveHotWords(PromptTemplate promptTemplate, List<String> hotWords) {
+    private List<String> resolveHotWords(Long tenantId, PromptTemplate promptTemplate, Long hotWordGroupId, List<String> hotWords) {
+        if (hotWordGroupId != null) {
+            if (hotWordGroupId <= 0) {
+                return List.of();
+            }
+            assertHotWordGroupAvailable(hotWordGroupId, tenantId);
+            return hotWordService.listEnabledByGroupIdIgnoreTenant(hotWordGroupId).stream()
+                    .map(HotWord::getWord)
+                    .filter(Objects::nonNull)
+                    .map(String::trim)
+                    .filter(item -> !item.isEmpty())
+                    .distinct()
+                    .toList();
+        }
         List<String> normalized = normalizeHotWords(hotWords);
         if (!normalized.isEmpty()) {
             return normalized;
@@ -92,6 +116,15 @@ public class MeetingRuntimeProfileResolverImpl implements MeetingRuntimeProfileR
                 .toList();
     }
 
+    private void assertHotWordGroupAvailable(Long hotWordGroupId, Long tenantId) {
+        boolean visible = hotWordGroupService.listVisibleOptions(tenantId).stream()
+                .map(HotWordGroupVO::getId)
+                .anyMatch(id -> Objects.equals(id, hotWordGroupId));
+        if (!visible) {
+            throw new RuntimeException("热词组不存在或不可用");
+        }
+    }
+
     private List<String> normalizeHotWords(List<String> hotWords) {
         return hotWords == null ? List.of() : hotWords.stream()
                 .filter(Objects::nonNull)

backend/src/test/java/com/imeeting/service/biz/impl/MeetingAccessServiceImplTest.java

@@ -40,6 +40,26 @@ class MeetingAccessServiceImplTest {
                 () -> service.assertCanControlRealtimeMeeting(meeting, loginUser, MeetingConstants.SOURCE_WEB));
     }
 
+    @Test
+    void allowsParticipantToViewAndExportButNotEdit() {
+        Meeting meeting = buildMeeting(MeetingConstants.TYPE_OFFLINE, MeetingConstants.SOURCE_WEB);
+        meeting.setParticipants("201,202,203");
+        LoginUser participant = new LoginUser(202L, 100L, "participant", false, false, null);
+
+        assertDoesNotThrow(() -> service.assertCanViewMeeting(meeting, participant));
+        assertDoesNotThrow(() -> service.assertCanExportMeeting(meeting, participant));
+        assertThrows(RuntimeException.class, () -> service.assertCanEditMeeting(meeting, participant));
+        assertThrows(RuntimeException.class, () -> service.assertCanManageRealtimeMeeting(meeting, participant));
+    }
+
+    @Test
+    void allowsTenantAdminToEditMeeting() {
+        Meeting meeting = buildMeeting(MeetingConstants.TYPE_OFFLINE, MeetingConstants.SOURCE_WEB);
+        LoginUser tenantAdmin = new LoginUser(300L, 100L, "tenant-admin", false, true, null);
+
+        assertDoesNotThrow(() -> service.assertCanEditMeeting(meeting, tenantAdmin));
+    }
+
     private Meeting buildMeeting(String meetingType, String meetingSource) {
         Meeting meeting = new Meeting();
         meeting.setTenantId(100L);

backend/src/test/java/com/imeeting/service/biz/impl/MeetingRuntimeProfileResolverImplTest.java

@@ -2,6 +2,7 @@ package com.imeeting.service.biz.impl;
 
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.imeeting.dto.biz.AiModelVO;
+import com.imeeting.dto.biz.HotWordGroupVO;
 import com.imeeting.dto.biz.RealtimeMeetingRuntimeProfile;
 import com.imeeting.entity.biz.AsrModel;
 import com.imeeting.entity.biz.HotWord;
@@ -10,6 +11,7 @@ import com.imeeting.entity.biz.PromptTemplate;
 import com.imeeting.mapper.biz.AsrModelMapper;
 import com.imeeting.mapper.biz.LlmModelMapper;
 import com.imeeting.service.biz.AiModelService;
+import com.imeeting.service.biz.HotWordGroupService;
 import com.imeeting.service.biz.HotWordService;
 import com.imeeting.service.biz.PromptTemplateService;
 import org.junit.jupiter.api.Test;
@@ -30,10 +32,12 @@ class MeetingRuntimeProfileResolverImplTest {
     void resolveShouldUseRequestedResourcesAndNormalizeHotWords() {
         AiModelService aiModelService = mock(AiModelService.class);
         PromptTemplateService promptTemplateService = mock(PromptTemplateService.class);
+        HotWordGroupService hotWordGroupService = mock(HotWordGroupService.class);
         HotWordService hotWordService = mock(HotWordService.class);
         MeetingRuntimeProfileResolverImpl resolver = new MeetingRuntimeProfileResolverImpl(
                 aiModelService,
                 promptTemplateService,
+                hotWordGroupService,
                 hotWordService,
                 mock(AsrModelMapper.class),
                 mock(LlmModelMapper.class)
@@ -55,6 +59,7 @@ class MeetingRuntimeProfileResolverImplTest {
                 null,
                 Boolean.TRUE,
                 Boolean.TRUE,
+                null,
                 Arrays.asList(" alpha ", "", "alpha", "beta", null)
         );
 
@@ -78,10 +83,12 @@ class MeetingRuntimeProfileResolverImplTest {
     void resolveShouldRejectCrossTenantModel() {
         AiModelService aiModelService = mock(AiModelService.class);
         PromptTemplateService promptTemplateService = mock(PromptTemplateService.class);
+        HotWordGroupService hotWordGroupService = mock(HotWordGroupService.class);
         HotWordService hotWordService = mock(HotWordService.class);
         MeetingRuntimeProfileResolverImpl resolver = new MeetingRuntimeProfileResolverImpl(
                 aiModelService,
                 promptTemplateService,
+                hotWordGroupService,
                 hotWordService,
                 mock(AsrModelMapper.class),
                 mock(LlmModelMapper.class)
@@ -101,6 +108,7 @@ class MeetingRuntimeProfileResolverImplTest {
                 null,
                 null,
                 null,
+                null,
                 List.of()
         ));
     }
@@ -109,10 +117,12 @@ class MeetingRuntimeProfileResolverImplTest {
     void resolveShouldUseTemplateBoundGroupWhenNoExplicitHotWords() {
         AiModelService aiModelService = mock(AiModelService.class);
         PromptTemplateService promptTemplateService = mock(PromptTemplateService.class);
+        HotWordGroupService hotWordGroupService = mock(HotWordGroupService.class);
         HotWordService hotWordService = mock(HotWordService.class);
         MeetingRuntimeProfileResolverImpl resolver = new MeetingRuntimeProfileResolverImpl(
                 aiModelService,
                 promptTemplateService,
+                hotWordGroupService,
                 hotWordService,
                 mock(AsrModelMapper.class),
                 mock(LlmModelMapper.class)
@@ -142,6 +152,7 @@ class MeetingRuntimeProfileResolverImplTest {
                 null,
                 Boolean.FALSE,
                 Boolean.FALSE,
+                null,
                 null
         );
 
@@ -153,12 +164,14 @@ class MeetingRuntimeProfileResolverImplTest {
     void resolveShouldFallbackToFirstEnabledModelUsingSortOrder() {
         AiModelService aiModelService = mock(AiModelService.class);
         PromptTemplateService promptTemplateService = mock(PromptTemplateService.class);
+        HotWordGroupService hotWordGroupService = mock(HotWordGroupService.class);
         HotWordService hotWordService = mock(HotWordService.class);
         AsrModelMapper asrModelMapper = mock(AsrModelMapper.class);
         LlmModelMapper llmModelMapper = mock(LlmModelMapper.class);
         MeetingRuntimeProfileResolverImpl resolver = new MeetingRuntimeProfileResolverImpl(
                 aiModelService,
                 promptTemplateService,
+                hotWordGroupService,
                 hotWordService,
                 asrModelMapper,
                 llmModelMapper
@@ -184,6 +197,7 @@ class MeetingRuntimeProfileResolverImplTest {
                 null,
                 null,
                 null,
+                null,
                 List.of()
         );
 
@@ -191,6 +205,55 @@ class MeetingRuntimeProfileResolverImplTest {
         assertEquals(22L, profile.getResolvedSummaryModelId());
     }
 
+    @Test
+    void resolveShouldPreferExplicitHotWordGroupOverTemplateBinding() {
+        AiModelService aiModelService = mock(AiModelService.class);
+        PromptTemplateService promptTemplateService = mock(PromptTemplateService.class);
+        HotWordGroupService hotWordGroupService = mock(HotWordGroupService.class);
+        HotWordService hotWordService = mock(HotWordService.class);
+        MeetingRuntimeProfileResolverImpl resolver = new MeetingRuntimeProfileResolverImpl(
+                aiModelService,
+                promptTemplateService,
+                hotWordGroupService,
+                hotWordService,
+                mock(AsrModelMapper.class),
+                mock(LlmModelMapper.class)
+        );
+
+        when(aiModelService.getModelById(11L, "ASR")).thenReturn(enabledModel(11L, 1L, "ASR-Model"));
+        when(aiModelService.getModelById(22L, "LLM")).thenReturn(enabledModel(22L, 1L, "LLM-Model"));
+        PromptTemplate template = enabledPrompt(33L, 1L, "Summary Prompt");
+        template.setHotWordGroupId(99L);
+        when(promptTemplateService.getById(33L)).thenReturn(template);
+
+        HotWordGroupVO explicitGroup = new HotWordGroupVO();
+        explicitGroup.setId(88L);
+        when(hotWordGroupService.listVisibleOptions(1L)).thenReturn(List.of(explicitGroup));
+
+        HotWord hotWord = new HotWord();
+        hotWord.setWord("override");
+        when(hotWordService.listEnabledByGroupIdIgnoreTenant(88L)).thenReturn(List.of(hotWord));
+
+        RealtimeMeetingRuntimeProfile profile = resolver.resolve(
+                1L,
+                11L,
+                22L,
+                33L,
+                null,
+                null,
+                null,
+                null,
+                null,
+                null,
+                null,
+                88L,
+                List.of()
+        );
+
+        assertEquals(88L, profile.getResolvedHotWordGroupId());
+        assertIterableEquals(List.of("override"), profile.getResolvedHotWords());
+    }
+
     private AiModelVO enabledModel(Long id, Long tenantId, String name) {
         AiModelVO model = new AiModelVO();
         model.setId(id);

frontend/src/api/business/meeting.ts

@@ -37,6 +37,23 @@ export interface MeetingVO {
   createdAt: string;
 }
 
+const AUDIO_MIME_TYPE_BY_EXTENSION: Record<string, string> = {
+  mp3: "audio/mpeg",
+  wav: "audio/wav",
+  m4a: "audio/mp4",
+  mp4: "audio/mp4",
+  aac: "audio/aac",
+};
+
+export const resolveAudioMimeType = (audioUrl?: string) => {
+  if (!audioUrl) {
+    return undefined;
+  }
+  const normalizedUrl = audioUrl.split("#")[0]?.split("?")[0] || "";
+  const extension = normalizedUrl.match(/\.([a-z0-9]+)$/i)?.[1]?.toLowerCase();
+  return extension ? AUDIO_MIME_TYPE_BY_EXTENSION[extension] : undefined;
+};
+
 export interface CreateMeetingCommand {
   id?: number;
   title: string;
@@ -49,6 +66,7 @@ export interface CreateMeetingCommand {
   asrModelId: number;
   summaryModelId?: number;
   promptId: number;
+  hotWordGroupId?: number;
   userPrompt?: string;
   useSpkId?: number;
   enableTextRefine?: boolean;
@@ -67,6 +85,7 @@ export interface CreateRealtimeMeetingCommand {
   asrModelId: number;
   summaryModelId?: number;
   promptId: number;
+  hotWordGroupId?: number;
   userPrompt?: string;
   mode?: string;
   language?: string;

frontend/src/components/business/MeetingCreateDrawer.tsx

@@ -7,6 +7,7 @@ import { useNavigate } from 'react-router-dom';
 import { getAiModelPage, getAiModelDefault, AiModelVO } from '../../api/business/aimodel';
 import { getPromptPage, PromptTemplateVO } from '../../api/business/prompt';
 import { getHotWordPage, HotWordVO } from '../../api/business/hotword';
+import { getHotWordGroupOptions, HotWordGroupVO } from '../../api/business/hotwordGroup';
 import { listUsers, pageParams } from '../../api';
 import { createMeeting, createRealtimeMeeting, uploadAudio, CreateRealtimeMeetingCommand } from '../../api/business/meeting';
 import { SysUser } from '../../types';
@@ -71,7 +72,9 @@ export const MeetingCreateDrawer: React.FC<MeetingCreateDrawerProps> = ({ open,
   const [llmModels, setLlmModels] = useState<AiModelVO[]>([]);
   const [prompts, setPrompts] = useState<PromptTemplateVO[]>([]);
   const [hotwordList, setHotwordList] = useState<HotWordVO[]>([]);
+  const [hotWordGroups, setHotWordGroups] = useState<HotWordGroupVO[]>([]);
   const [userList, setUserList] = useState<SysUser[]>([]);
+  const [hotWordGroupTouched, setHotWordGroupTouched] = useState(false);
   
   const [audioUrl, setAudioUrl] = useState('');
   const [uploadProgress, setUploadProgress] = useState(0);
@@ -80,15 +83,18 @@ export const MeetingCreateDrawer: React.FC<MeetingCreateDrawerProps> = ({ open,
 
   const watchedAsrModelId = Form.useWatch("asrModelId", form);
   const watchedPromptId = Form.useWatch("promptId", form);
+  const watchedHotWordGroupId = Form.useWatch("hotWordGroupId", form);
   const watchedSummaryModelId = Form.useWatch("summaryModelId", form);
 
   const selectedAsrModel = useMemo(() => asrModels.find((item) => item.id === watchedAsrModelId) || null, [asrModels, watchedAsrModelId]);
   const selectedSummaryModel = useMemo(() => llmModels.find((item) => item.id === watchedSummaryModelId) || null, [llmModels, watchedSummaryModelId]);
+  const selectedPrompt = useMemo(() => prompts.find((item) => item.id === watchedPromptId) || null, [prompts, watchedPromptId]);
   const offlineAudioMaxSizeBytes = useMemo(() => offlineAudioMaxSizeMb * 1024 * 1024, [offlineAudioMaxSizeMb]);
 
   useEffect(() => {
     if (open) {
       setType(initialType);
+      setHotWordGroupTouched(false);
       loadInitialData();
       setAudioUrl('');
       setUploadProgress(0);
@@ -96,14 +102,22 @@ export const MeetingCreateDrawer: React.FC<MeetingCreateDrawerProps> = ({ open,
     }
   }, [open, initialType]);
 
+  useEffect(() => {
+    if (!open || hotWordGroupTouched) {
+      return;
+    }
+    form.setFieldValue('hotWordGroupId', selectedPrompt?.hotWordGroupId);
+  }, [form, hotWordGroupTouched, open, selectedPrompt]);
+
   const loadInitialData = async () => {
     setLoading(true);
     try {
-      const [asrRes, llmRes, promptRes, hotwordRes, users, defaultAsr, defaultLlm] = await Promise.all([
+      const [asrRes, llmRes, promptRes, hotwordRes, hotWordGroupRes, users, defaultAsr, defaultLlm] = await Promise.all([
         getAiModelPage({ current: 1, size: 100, type: 'ASR' }),
         getAiModelPage({ current: 1, size: 100, type: 'LLM' }),
         getPromptPage({ current: 1, size: 100 }),
         getHotWordPage({ current: 1, size: 1000 }),
+        getHotWordGroupOptions(),
         listUsers(),
         getAiModelDefault("ASR"),
         getAiModelDefault("LLM"),
@@ -118,15 +132,18 @@ export const MeetingCreateDrawer: React.FC<MeetingCreateDrawerProps> = ({ open,
       setLlmModels(activeLlmModels);
       setPrompts(activePrompts);
       setHotwordList(activeHotwords);
+      setHotWordGroups((hotWordGroupRes.data.data || []).filter((item: HotWordGroupVO) => item.status === 1));
       setUserList(users || []);
       setOfflineAudioMaxSizeMb(await loadOfflineAudioMaxSizeMb());
+      const defaultPrompt = activePrompts.length > 0 ? activePrompts[0] : undefined;
 
       form.setFieldsValue({
         title: type === 'upload' ? `文件会议 ${dayjs().format("MM-DD HH:mm")}` : `实时会议 ${dayjs().format("MM-DD HH:mm")}`,
         meetingTime: dayjs(),
         asrModelId: defaultAsr.data.data?.id,
         summaryModelId: defaultLlm.data.data?.id,
-        promptId: activePrompts.length > 0 ? activePrompts[0].id : undefined,
+        promptId: defaultPrompt?.id,
+        hotWordGroupId: defaultPrompt?.hotWordGroupId,
         useSpkId: 1,
         enableTextRefine: false,
         mode: "2pass",
@@ -223,6 +240,12 @@ export const MeetingCreateDrawer: React.FC<MeetingCreateDrawerProps> = ({ open,
     setSubmitting(true);
     try {
       const { hostUserId, ...meetingValues } = values;
+      const selectedHotWords = meetingValues.hotWordGroupId == null || meetingValues.hotWordGroupId === 0
+        ? undefined
+        : hotwordList
+            .filter((item) => item.hotWordGroupId === meetingValues.hotWordGroupId)
+            .map((item) => item.word)
+            .filter((word) => !!word?.trim());
       
       if (type === 'upload') {
         await createMeeting({
@@ -231,13 +254,16 @@ export const MeetingCreateDrawer: React.FC<MeetingCreateDrawerProps> = ({ open,
           meetingTime: meetingValues.meetingTime.format('YYYY-MM-DD HH:mm:ss'),
           audioUrl,
           participants: meetingValues.participants?.join(','),
-          tags: meetingValues.tags?.join(',')
+          tags: meetingValues.tags?.join(','),
+          hotWords: selectedHotWords
         });
         message.success('会议发起成功');
         onSuccess();
         onCancel();
       } else {
-        const selectedHotwords = hotwordList.map((item) => ({
+        const selectedHotwords = hotwordList
+          .filter((item) => item.hotWordGroupId === meetingValues.hotWordGroupId && meetingValues.hotWordGroupId !== 0)
+          .map((item) => ({
             hotword: item.word,
             weight: Number(item.weight || 2) / 10,
           }));
@@ -255,6 +281,7 @@ export const MeetingCreateDrawer: React.FC<MeetingCreateDrawerProps> = ({ open,
           enableItn: meetingValues.enableItn !== false,
           enableTextRefine: !!meetingValues.enableTextRefine,
           saveAudio: !!meetingValues.saveAudio,
+          hotWords: selectedHotWords,
         };
 
         const res = await createRealtimeMeeting(payload);
@@ -426,6 +453,71 @@ export const MeetingCreateDrawer: React.FC<MeetingCreateDrawerProps> = ({ open,
             )}
           </Form.Item>
 
+          {/*
+          <Form.Item
+            name="hotWordGroupId"
+            label="热词组"
+            tooltip={selectedPrompt?.hotWordGroupName ? `默认跟随模板：${selectedPrompt.hotWordGroupName}` : '模板未绑定热词组时可手动选择'}
+            extra={watchedHotWordGroupId != null ? '创建会议时会优先使用这里选中的热词组' : undefined}
+          >
+            <Select
+              placeholder={selectedPrompt?.hotWordGroupId ? '默认已带出模板热词组，可按需修改' : '请选择热词组'}
+              size="large"
+              options={[
+                { label: '不使用热词组', value: 0 },
+                ...hotWordGroups.map((item) => ({
+                  label: `${item.groupName} (${item.hotWordCount}/200)`,
+                  value: item.id,
+                })),
+              ]}
+              onChange={() => setHotWordGroupTouched(true)}
+            />
+          </Form.Item>
+          */}
+
+          {/*
+
+          <Form.Item
+            name="hotWordGroupId"
+            label="热词组"
+            tooltip={selectedPrompt?.hotWordGroupName ? `默认跟随模板：${selectedPrompt.hotWordGroupName}` : '模板未绑定热词组时可手动选择'}
+            extra={watchedHotWordGroupId != null ? '创建会议时会优先使用这里选中的热词组' : undefined}
+          >
+            <Select
+              placeholder={selectedPrompt?.hotWordGroupId ? '默认已带出模板热词组，可按需修改' : '请选择热词组'}
+              size="large"
+              options={[
+                { label: '不使用热词组', value: 0 },
+                ...hotWordGroups.map((item) => ({
+                  label: `${item.groupName} (${item.hotWordCount}/200)`,
+                  value: item.id,
+                })),
+              ]}
+              onChange={() => setHotWordGroupTouched(true)}
+            />
+          </Form.Item>
+          */}
+
+          <Form.Item
+            name="hotWordGroupId"
+            label={"\u70ed\u8bcd\u7ec4"}
+            tooltip={selectedPrompt?.hotWordGroupName ? `\u9ed8\u8ba4\u8ddf\u968f\u6a21\u677f\uff1a${selectedPrompt.hotWordGroupName}` : '\u6a21\u677f\u672a\u7ed1\u5b9a\u70ed\u8bcd\u7ec4\u65f6\u53ef\u624b\u52a8\u9009\u62e9'}
+            extra={watchedHotWordGroupId != null ? '\u521b\u5efa\u4f1a\u8bae\u65f6\u4f1a\u4f18\u5148\u4f7f\u7528\u8fd9\u91cc\u9009\u4e2d\u7684\u70ed\u8bcd\u7ec4' : undefined}
+          >
+            <Select
+              placeholder={selectedPrompt?.hotWordGroupId ? '\u9ed8\u8ba4\u5df2\u5e26\u51fa\u6a21\u677f\u70ed\u8bcd\u7ec4\uff0c\u53ef\u6309\u9700\u4fee\u6539' : '\u8bf7\u9009\u62e9\u70ed\u8bcd\u7ec4'}
+              size="large"
+              options={[
+                { label: '\u4e0d\u4f7f\u7528\u70ed\u8bcd\u7ec4', value: 0 },
+                ...hotWordGroups.map((item) => ({
+                  label: `${item.groupName} (${item.hotWordCount}/200)`,
+                  value: item.id,
+                })),
+              ]}
+              onChange={() => setHotWordGroupTouched(true)}
+            />
+          </Form.Item>
+
           <Collapse
             ghost
             expandIconPosition="end"
@@ -514,7 +606,7 @@ export const MeetingCreateDrawer: React.FC<MeetingCreateDrawerProps> = ({ open,
                 <div>
                   <p className="ant-upload-drag-icon" style={{ marginBottom: 16 }}><CloudUploadOutlined style={{ fontSize: 56, color: '#1890ff' }} /></p>
                   <p className="ant-upload-text" style={{ fontSize: 18, fontWeight: 500, color: 'var(--app-text-main)' }}>点击或拖拽录音文件到此处</p>
-                  <p className="ant-upload-hint" style={{ fontSize: 14, marginTop: 12, color: 'var(--app-text-secondary)' }}>支持高质量 .mp3, .wav, .m4a 格式音频</p>
+                  <p className="ant-upload-hint" style={{ fontSize: 14, marginTop: 12, color: 'var(--app-text-secondary)' }}>支持 .mp3、.wav，以及 AAC 编码的 .m4a 音频</p>
                   <p className="ant-upload-hint" style={{ fontSize: 13, marginTop: 8, color: 'var(--app-text-secondary)' }}>文件大小不超过 {offlineAudioMaxSizeMb}MB，取值来自系统参数配置</p>
                   {uploadProgress > 0 && uploadProgress < 100 && (
                     <div style={{ width: '60%', margin: '32px auto 0' }}>

frontend/src/pages/business/MeetingDetail.tsx

@@ -35,6 +35,7 @@ import {
   MeetingTranscriptVO,
   MeetingVO,
   reSummary,
+  resolveAudioMimeType,
   retryMeetingTranscription,
   updateMeetingBasic,
   updateMeetingTranscript,
@@ -655,6 +656,8 @@ const MeetingDetail: React.FC = () => {
   const [shareSaving, setShareSaving] = useState(false);
   const [sharePasswordEnabled, setSharePasswordEnabled] = useState(false);
   const [sharePasswordDraft, setSharePasswordDraft] = useState('');
+  const emptyTranscriptNoticeShownRef = useRef<number | null>(null);
+  const audioPlaybackErrorShownRef = useRef<string | null>(null);
 
 
   const audioRef = useRef<HTMLAudioElement>(null);
@@ -709,13 +712,26 @@ const MeetingDetail: React.FC = () => {
     const profileStr = sessionStorage.getItem('userProfile');
     if (profileStr) {
       const profile = JSON.parse(profileStr);
-      return profile.isPlatformAdmin === true || profile.userId === meeting.creatorId;
+      return profile.isPlatformAdmin === true || profile.isTenantAdmin === true || profile.userId === meeting.creatorId;
     }
     return false;
   }, [meeting]);
 
   const canRetrySummary = isOwner && transcripts.length > 0 && meeting?.status !== 1 && meeting?.status !== 2;
   const canRetryTranscription = isOwner && meeting?.status === 4 && transcripts.length === 0 && !!meeting?.audioUrl;
+  const emptyTranscriptFailureNotice = useMemo(() => {
+    if (!meeting || meeting.status !== 4 || transcripts.length > 0) {
+      return null;
+    }
+
+    return {
+      title: '识别已结束，但没有生成可用转录',
+      description: canRetryTranscription
+        ? 'ASR 调用已返回，但当前没有写入任何转录文本，所以列表状态仍显示失败。你可以直接重新识别，或先检查录音是否静音、时长过短、音量过低。'
+        : 'ASR 调用已返回，但当前没有写入任何转录文本，所以列表状态仍显示失败。建议先检查录音是否静音、时长过短、音量过低或音质异常。',
+      hint: canRetryTranscription ? '可以直接点击“重新识别”继续处理。' : '当前没有可重试的音频入口，请先确认原始录音文件是否有效。',
+    };
+  }, [canRetryTranscription, meeting, transcripts.length]);
 
   useEffect(() => {
     if (!meeting?.audioUrl) {
@@ -788,6 +804,21 @@ const MeetingDetail: React.FC = () => {
     }
   }, [meeting?.id, meeting?.audioSaveStatus, meeting?.audioSaveMessage]);
 
+  useEffect(() => {
+    if (!meeting?.id || !emptyTranscriptFailureNotice) {
+      return;
+    }
+    if (emptyTranscriptNoticeShownRef.current === meeting.id) {
+      return;
+    }
+
+    message.warning({
+      content: emptyTranscriptFailureNotice.title,
+      duration: 4,
+    });
+    emptyTranscriptNoticeShownRef.current = meeting.id;
+  }, [emptyTranscriptFailureNotice, meeting?.id, message]);
+
   useEffect(() => {
     if (!sharePopoverOpen) {
       return;
@@ -797,39 +828,6 @@ const MeetingDetail: React.FC = () => {
     setSharePasswordDraft(normalizedPassword);
   }, [sharePopoverOpen, meeting?.accessPassword]);
 
-  useEffect(() => {
-    const audio = audioRef.current;
-    if (!audio) return undefined;
-
-    const handleLoadedMetadata = () => {
-      setAudioDuration(Number.isFinite(audio.duration) ? audio.duration : 0);
-      setAudioCurrentTime(audio.currentTime || 0);
-      audio.playbackRate = audioPlaybackRate;
-    };
-    const handleTimeUpdate = () => {
-      setAudioCurrentTime(audio.currentTime || 0);
-    };
-    const handlePlay = () => setAudioPlaying(true);
-    const handlePause = () => setAudioPlaying(false);
-    const handleEnded = () => setAudioPlaying(false);
-
-    audio.addEventListener('loadedmetadata', handleLoadedMetadata);
-    audio.addEventListener('timeupdate', handleTimeUpdate);
-    audio.addEventListener('play', handlePlay);
-    audio.addEventListener('pause', handlePause);
-    audio.addEventListener('ended', handleEnded);
-
-    handleLoadedMetadata();
-
-    return () => {
-      audio.removeEventListener('loadedmetadata', handleLoadedMetadata);
-      audio.removeEventListener('timeupdate', handleTimeUpdate);
-      audio.removeEventListener('play', handlePlay);
-      audio.removeEventListener('pause', handlePause);
-      audio.removeEventListener('ended', handleEnded);
-    };
-  }, [meeting?.audioUrl, audioPlaybackRate, meeting?.status]);
-
   const loadAiConfigs = async () => {
     try {
       const [modelRes, promptRes, defaultRes] = await Promise.all([
@@ -1078,6 +1076,62 @@ const MeetingDetail: React.FC = () => {
     audioRef.current.play();
   }, []);
 
+  const handleAudioPlaybackError = useCallback(() => {
+    const currentAudioUrl = meeting?.audioUrl || '';
+    if (!currentAudioUrl || audioPlaybackErrorShownRef.current === currentAudioUrl) {
+      return;
+    }
+    const normalizedUrl = currentAudioUrl.split('#')[0]?.split('?')[0]?.toLowerCase() || '';
+    const isM4a = normalizedUrl.endsWith('.m4a');
+    message.warning(
+      isM4a
+        ? '当前 m4a 文件在本机浏览器中无法直接播放。已确认文件与服务端响应基本正常，更可能是浏览器对该录音参数或容器实现的兼容性问题。建议优先使用 mp3、wav，或下载到本地播放。'
+        : '当前音频文件无法播放，请检查文件是否损坏或格式是否兼容。',
+    );
+    audioPlaybackErrorShownRef.current = currentAudioUrl;
+    setAudioPlaying(false);
+  }, [meeting?.audioUrl, message]);
+
+  useEffect(() => {
+    const audio = audioRef.current;
+    if (!audio) return undefined;
+
+    const handleLoadedMetadata = () => {
+      setAudioDuration(Number.isFinite(audio.duration) ? audio.duration : 0);
+      setAudioCurrentTime(audio.currentTime || 0);
+      audio.playbackRate = audioPlaybackRate;
+    };
+    const handleTimeUpdate = () => {
+      setAudioCurrentTime(audio.currentTime || 0);
+    };
+    const handlePlay = () => setAudioPlaying(true);
+    const handlePause = () => setAudioPlaying(false);
+    const handleEnded = () => setAudioPlaying(false);
+    const handleError = () => handleAudioPlaybackError();
+
+    audio.addEventListener('loadedmetadata', handleLoadedMetadata);
+    audio.addEventListener('durationchange', handleLoadedMetadata);
+    audio.addEventListener('canplay', handleLoadedMetadata);
+    audio.addEventListener('timeupdate', handleTimeUpdate);
+    audio.addEventListener('play', handlePlay);
+    audio.addEventListener('pause', handlePause);
+    audio.addEventListener('ended', handleEnded);
+    audio.addEventListener('error', handleError);
+
+    handleLoadedMetadata();
+
+    return () => {
+      audio.removeEventListener('loadedmetadata', handleLoadedMetadata);
+      audio.removeEventListener('durationchange', handleLoadedMetadata);
+      audio.removeEventListener('canplay', handleLoadedMetadata);
+      audio.removeEventListener('timeupdate', handleTimeUpdate);
+      audio.removeEventListener('play', handlePlay);
+      audio.removeEventListener('pause', handlePause);
+      audio.removeEventListener('ended', handleEnded);
+      audio.removeEventListener('error', handleError);
+    };
+  }, [meeting?.audioUrl, audioPlaybackRate, meeting?.status, handleAudioPlaybackError]);
+
   const toggleAudioPlayback = () => {
     if (!audioRef.current) return;
     if (audioRef.current.paused) {
@@ -1413,7 +1467,6 @@ const MeetingDetail: React.FC = () => {
           </Col>
         </Row>
       </Card>
-
       <div style={{ flex: 1, minHeight: 0 }}>
         {meeting.status === 1 ? (
           <MeetingProgressDisplay
@@ -1427,8 +1480,9 @@ const MeetingDetail: React.FC = () => {
           />
         ) : (
           <Row gutter={24} style={{ height: '100%' }}>
-            <Col xs={24} lg={14} style={{ height: '100%' }}>
+            <Col xs={24} lg={emptyTranscriptFailureNotice ? 24 : 14} style={{ height: '100%' }}>
               <div ref={leftColumnRef} className="detail-side-column detail-left-column">
+                {!emptyTranscriptFailureNotice && (
                 <Card className="left-flow-card summary-panel" variant="borderless">
                   <div className="summary-head">
                     <div className="summary-title">
@@ -1600,7 +1654,9 @@ const MeetingDetail: React.FC = () => {
                     )}
                   </div>
                 </Card>
+                )}
 
+                {!emptyTranscriptFailureNotice && (
                 <div className="section-divider-note">
                   <div className="section-divider-line" />
                   <div className="section-divider-text">
@@ -1608,10 +1664,21 @@ const MeetingDetail: React.FC = () => {
                   </div>
                   <div className="section-divider-line" />
                 </div>
+                )}
 
                 <div ref={transcriptSectionRef} className="transcript-player-anchor">
                   <Card className="left-flow-card" variant="borderless" title={<span><AudioOutlined /> 原文</span>}>
-                    {meeting.audioUrl && <audio ref={audioRef} src={meeting.audioUrl} style={{ display: 'none' }} preload="metadata" />}
+                    {meeting.audioUrl && (
+                      <audio ref={audioRef} style={{ display: 'none' }} preload="auto">
+                        <source src={meeting.audioUrl} type={resolveAudioMimeType(meeting.audioUrl)} />
+                      </audio>
+                    )}
+                    {emptyTranscriptFailureNotice && (
+                      <div className="empty-transcript-inline-note">
+                        <div className="empty-transcript-inline-note__title">当前没有可展示的转录内容</div>
+                        <div className="empty-transcript-inline-note__text">{emptyTranscriptFailureNotice.description}</div>
+                      </div>
+                    )}
                     {meeting.audioSaveStatus === 'FAILED' && (
                       <Alert
                         type="warning"
@@ -1653,6 +1720,7 @@ const MeetingDetail: React.FC = () => {
               </div>
             </Col>
 
+            {!emptyTranscriptFailureNotice && (
             <Col xs={24} lg={10} style={{ height: '100%' }}>
               <div className="detail-side-column ai-summary-column">
                 <Card
@@ -1716,6 +1784,7 @@ const MeetingDetail: React.FC = () => {
                 </Card>
               </div>
             </Col>
+            )}
           </Row>
         )}
       </div>
@@ -1831,6 +1900,83 @@ const MeetingDetail: React.FC = () => {
             radial-gradient(circle at top left, rgba(252, 208, 157, 0.18), transparent 26%),
             linear-gradient(180deg, rgba(255, 252, 247, 0.98), rgba(248, 241, 231, 0.98));
         }
+        .empty-transcript-hero {
+          margin-bottom: 16px;
+          padding: 18px 20px;
+          border-radius: 24px;
+          border: 1px solid rgba(220, 170, 77, 0.24);
+          background:
+            radial-gradient(circle at top right, rgba(255, 233, 188, 0.72), transparent 34%),
+            linear-gradient(135deg, rgba(255, 252, 245, 0.98), rgba(255, 245, 223, 0.98));
+          box-shadow: 0 22px 48px rgba(188, 148, 68, 0.14);
+        }
+        .empty-transcript-hero__badge {
+          display: inline-flex;
+          align-items: center;
+          padding: 6px 10px;
+          border-radius: 999px;
+          background: rgba(122, 80, 14, 0.08);
+          color: #9a6700;
+          font-size: 11px;
+          font-weight: 800;
+          letter-spacing: 0.12em;
+          text-transform: uppercase;
+        }
+        .empty-transcript-hero__content {
+          margin-top: 14px;
+          display: flex;
+          align-items: flex-start;
+          justify-content: space-between;
+          gap: 18px;
+        }
+        .empty-transcript-hero__title {
+          color: #7a4f0f;
+          font-size: 20px;
+          font-weight: 800;
+          line-height: 1.3;
+        }
+        .empty-transcript-hero__description {
+          margin-top: 8px;
+          max-width: 760px;
+          color: #7a5b27;
+          font-size: 14px;
+          line-height: 1.8;
+        }
+        .empty-transcript-hero__hint {
+          margin-top: 8px;
+          color: #b26a00;
+          font-size: 13px;
+          font-weight: 600;
+        }
+        .empty-transcript-hero__actions {
+          display: flex;
+          flex-shrink: 0;
+          align-items: center;
+          gap: 10px;
+        }
+        .empty-transcript-player {
+          margin-top: 16px;
+          max-width: 480px;
+          background: rgba(255, 255, 255, 0.8);
+        }
+        .empty-transcript-inline-note {
+          margin-bottom: 16px;
+          padding: 14px 16px;
+          border-radius: 18px;
+          border: 1px solid rgba(220, 170, 77, 0.22);
+          background: linear-gradient(135deg, rgba(255, 250, 240, 0.96), rgba(255, 245, 224, 0.92));
+        }
+        .empty-transcript-inline-note__title {
+          color: #8a5a00;
+          font-size: 14px;
+          font-weight: 700;
+        }
+        .empty-transcript-inline-note__text {
+          margin-top: 6px;
+          color: #876537;
+          font-size: 13px;
+          line-height: 1.7;
+        }
         .meeting-share-popover .ant-popover-inner-content {
           padding: 0;
         }
@@ -2508,6 +2654,13 @@ const MeetingDetail: React.FC = () => {
           }
         }
         @media (max-width: 992px) {
+          .empty-transcript-hero__content {
+            flex-direction: column;
+          }
+          .empty-transcript-hero__actions {
+            width: 100%;
+            flex-wrap: wrap;
+          }
           .meeting-share-card {
             width: min(86vw, 292px);
           }

frontend/src/pages/business/MeetingPreview.tsx

@@ -23,6 +23,7 @@ import ReactMarkdown from "react-markdown";
 import {
   getMeetingPreviewAccess,
   getPublicMeetingPreview,
+  resolveAudioMimeType,
   type MeetingTranscriptVO,
   type MeetingVO,
 } from "../../api/business/meeting";
@@ -163,6 +164,7 @@ export default function MeetingPreview() {
   const { id } = useParams();
   const [searchParams] = useSearchParams();
   const audioRef = useRef<HTMLAudioElement | null>(null);
+  const audioPlaybackErrorShownRef = useRef<string | null>(null);
   const transcriptItemRefs = useRef<Record<number, HTMLDivElement | null>>({});
   const [meeting, setMeeting] = useState<MeetingVO | null>(null);
   const [transcripts, setTranscripts] = useState<MeetingTranscriptVO[]>([]);
@@ -411,6 +413,22 @@ export default function MeetingPreview() {
     }
   };
 
+  const handleAudioError = () => {
+    const currentAudioUrl = meeting?.audioUrl || "";
+    if (!currentAudioUrl || audioPlaybackErrorShownRef.current === currentAudioUrl) {
+      return;
+    }
+    const normalizedUrl = currentAudioUrl.split("#")[0]?.split("?")[0]?.toLowerCase() || "";
+    const isM4a = normalizedUrl.endsWith(".m4a");
+    message.warning(
+      isM4a
+        ? "当前 m4a 文件在本机浏览器中无法直接播放。已确认文件与服务端响应基本正常，更可能是浏览器对该录音参数或容器实现的兼容性问题。建议优先使用 mp3、wav，或下载到本地播放。"
+        : TEXT.audioUnavailable,
+    );
+    audioPlaybackErrorShownRef.current = currentAudioUrl;
+    setAudioPlaying(false);
+  };
+
   const renderMeetingTitle = (title?: string) => {
     const safeTitle = title || TEXT.untitledMeeting;
     return safeTitle.split(/(\d+)/).map((part, index) =>
@@ -885,15 +903,17 @@ export default function MeetingPreview() {
       {meeting.audioUrl && (
         <audio
           ref={audioRef}
-          src={meeting.audioUrl}
           onTimeUpdate={handleAudioTimeUpdate}
           onPlay={handleAudioPlay}
           onPause={handleAudioPause}
           onEnded={handleAudioEnded}
           onLoadedMetadata={handleAudioLoadedMetadata}
+          onError={handleAudioError}
           style={{ display: 'none' }}
-          preload="metadata"
+          preload="auto"
-        />
+        >
+          <source src={meeting.audioUrl} type={resolveAudioMimeType(meeting.audioUrl)} />
+        </audio>
       )}
 
       {meeting.audioUrl && pageTab === 'transcript' ? (