feat: 引入会议状态枚举并更新相关逻辑

- 新增 `MeetingStatusEnum` 枚举类，定义会议状态及其相关方法
- 更新多个服务和控制器中的会议状态处理逻辑，使用 `MeetingStatusEnum` 代替硬编码的状态值
- 优化会议状态判断和设置的相关代码，提高可读性和维护性

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

@@ -26,6 +26,7 @@ import com.imeeting.dto.biz.UnifiedMeetingStatusVO;
 import com.imeeting.entity.biz.AiTask;
 import com.imeeting.entity.biz.Meeting;
 import com.imeeting.entity.biz.PromptTemplate;
+import com.imeeting.enums.MeetingStatusEnum;
 import com.imeeting.service.android.AndroidAuthService;
 import com.imeeting.service.android.AndroidChunkUploadService;
 import com.imeeting.service.android.legacy.LegacyMeetingAdapterService;
@@ -454,7 +455,7 @@ public class AndroidMeetingController {
         AiTask asrTask = findLatestTask(meetingId, "ASR");
         AiTask summaryTask = findLatestTask(meetingId, "SUMMARY");
         boolean summaryCompleted = summaryTask != null && Integer.valueOf(2).equals(summaryTask.getStatus());
-        MeetingVO detail = (Integer.valueOf(3).equals(meeting.getStatus()) || summaryCompleted)
+        MeetingVO detail = (MeetingStatusEnum.isCode(meeting.getStatus(), MeetingStatusEnum.COMPLETED) || summaryCompleted)
                 ? meetingQueryService.getDetail(meetingId)
                 : null;
         boolean hasSummary = detail != null && detail.getSummaryContent() != null && !detail.getSummaryContent().isBlank();
@@ -736,7 +737,11 @@ public class AndroidMeetingController {
         }
         return meetingService.getOne(new LambdaQueryWrapper<Meeting>()
                 .eq(Meeting::getSourceDeviceCode, deviceId)
-                .in(Meeting::getStatus, 0, 1, 2)
+                .in(Meeting::getStatus, MeetingStatusEnum.codesOf(
+                        MeetingStatusEnum.INITIALIZING,
+                        MeetingStatusEnum.TRANSCRIBING,
+                        MeetingStatusEnum.SUMMARIZING
+                ))
                 .orderByDesc(Meeting::getId)
                 .last("LIMIT 1"));
     }

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

@@ -6,6 +6,7 @@ import com.imeeting.dto.android.AndroidPublicMeetingSessionResultVO;
 import com.imeeting.dto.android.AndroidPublicMeetingSessionRequest;
 import com.imeeting.entity.biz.AndroidPushMessage;
 import com.imeeting.entity.biz.Meeting;
+import com.imeeting.enums.MeetingStatusEnum;
 import com.imeeting.enums.MeetingPushTypeEnum;
 import com.imeeting.mapper.DeviceInfoMapper;
 import com.imeeting.service.android.AndroidAuthService;
@@ -113,7 +114,8 @@ public class AndroidPublicMeetingController {
         if (meeting.getSourceDeviceCode() == null || !meeting.getSourceDeviceCode().equals(authContext.getDeviceId())) {
             throw new RuntimeException("当前会议不属于该设备");
         }
-        if (meeting.getStatus() != null && meeting.getStatus() > 2) {
+        if (MeetingStatusEnum.isCode(meeting.getStatus(), MeetingStatusEnum.COMPLETED)
+                || MeetingStatusEnum.isCode(meeting.getStatus(), MeetingStatusEnum.FAILED)) {
             throw new RuntimeException("当前会议状态不允许删除");
         }
         meetingCommandService.deleteMeeting(meetingId);

backend/src/main/java/com/imeeting/controller/android/legacy/LegacyMeetingController.java

@@ -21,6 +21,7 @@ import com.imeeting.entity.biz.AiTask;
 import com.imeeting.entity.biz.Meeting;
 import com.imeeting.mapper.biz.MeetingTranscriptMapper;
 import com.imeeting.entity.biz.PromptTemplate;
+import com.imeeting.enums.MeetingStatusEnum;
 import com.imeeting.service.android.legacy.LegacyMeetingAdapterService;
 import com.imeeting.support.AndroidRequestLogHelper;
 import com.imeeting.service.biz.AiTaskService;
@@ -256,7 +257,7 @@ public class LegacyMeetingController {
         AiTask asrTask = findLatestTask(meetingId, "ASR");
         AiTask summaryTask = findLatestTask(meetingId, "SUMMARY");
         boolean summaryCompleted = summaryTask != null && Integer.valueOf(2).equals(summaryTask.getStatus());
-        MeetingVO detail = (Integer.valueOf(3).equals(meeting.getStatus()) || summaryCompleted)
+        MeetingVO detail = (MeetingStatusEnum.isCode(meeting.getStatus(), MeetingStatusEnum.COMPLETED) || summaryCompleted)
                 ? meetingQueryService.getDetail(meetingId)
                 : null;
         boolean hasSummary = detail != null && detail.getSummaryContent() != null && !detail.getSummaryContent().isBlank();
@@ -428,7 +429,7 @@ public class LegacyMeetingController {
         AiTask summaryTask = findLatestTask(meetingId, "SUMMARY");
         boolean summaryCompleted = summaryTask != null && Integer.valueOf(2).equals(summaryTask.getStatus());
 
-        if (Integer.valueOf(3).equals(meeting.getStatus()) || summaryCompleted) {
+        if (MeetingStatusEnum.isCode(meeting.getStatus(), MeetingStatusEnum.COMPLETED) || summaryCompleted) {
             return new LegacyMeetingProcessingStatusResponse("completed", 100, STAGE_COMPLETED);
         }
         if (isFailed(asrTask)) {

backend/src/main/java/com/imeeting/enums/MeetingStatusEnum.java

@@ -0,0 +1,54 @@
+package com.imeeting.enums;
+
+import java.util.Arrays;
+import java.util.List;
+
+public enum MeetingStatusEnum {
+    INITIALIZING(0, "初始化/待处理"),
+    TRANSCRIBING(1, "转写中"),
+    SUMMARIZING(2, "总结中"),
+    COMPLETED(3, "已完成"),
+    FAILED(4, "失败");
+
+    private final int code;
+    private final String description;
+
+    MeetingStatusEnum(int code, String description) {
+        this.code = code;
+        this.description = description;
+    }
+
+    public int getCode() {
+        return code;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public boolean isTerminal() {
+        return this == COMPLETED || this == FAILED;
+    }
+
+    public boolean isUnfinished() {
+        return this == INITIALIZING || this == TRANSCRIBING || this == SUMMARIZING;
+    }
+
+    public static MeetingStatusEnum fromCode(Integer code) {
+        if (code == null) {
+            return null;
+        }
+        return Arrays.stream(values())
+                .filter(item -> item.code == code)
+                .findFirst()
+                .orElse(null);
+    }
+
+    public static boolean isCode(Integer code, MeetingStatusEnum status) {
+        return code != null && status != null && code == status.code;
+    }
+
+    public static List<Integer> codesOf(MeetingStatusEnum... statuses) {
+        return Arrays.stream(statuses).map(MeetingStatusEnum::getCode).toList();
+    }
+}

backend/src/main/java/com/imeeting/listener/MeetingTaskRecoveryListener.java

@@ -2,6 +2,7 @@ package com.imeeting.listener;
 
 import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
 import com.imeeting.entity.biz.Meeting;
+import com.imeeting.enums.MeetingStatusEnum;
 import com.imeeting.mapper.biz.MeetingMapper;
 import com.imeeting.service.biz.AiTaskService;
 import com.imeeting.support.TaskSecurityContextRunner;
@@ -33,7 +34,10 @@ public class MeetingTaskRecoveryListener implements ApplicationRunner {
 
         List<Meeting> pendingMeetings = taskSecurityContextRunner.callAsPlatformAdmin(() ->
                 meetingMapper.selectList(new LambdaQueryWrapper<Meeting>()
-                        .in(Meeting::getStatus, 1, 2)
+                        .in(Meeting::getStatus, MeetingStatusEnum.codesOf(
+                                MeetingStatusEnum.TRANSCRIBING,
+                                MeetingStatusEnum.SUMMARIZING
+                        ))
                         .eq(Meeting::getIsDeleted, 0))
         );
         if (pendingMeetings.isEmpty()) {
@@ -46,10 +50,10 @@ public class MeetingTaskRecoveryListener implements ApplicationRunner {
                 meetingLockCache.clearDispatchLocks(meeting.getId());
                 meetingAsrPermitCache.clearRecoveryState(meeting.getId());
 
-                if (Integer.valueOf(1).equals(meeting.getStatus())) {
+                if (MeetingStatusEnum.isCode(meeting.getStatus(), MeetingStatusEnum.TRANSCRIBING)) {
                     log.info("Recovering ASR task for meeting {}", meeting.getId());
                     aiTaskService.dispatchTasks(meeting.getId(), meeting.getTenantId(), meeting.getCreatorId());
-                } else if (Integer.valueOf(2).equals(meeting.getStatus())) {
+                } else if (MeetingStatusEnum.isCode(meeting.getStatus(), MeetingStatusEnum.SUMMARIZING)) {
                     log.info("Recovering summary task for meeting {}", meeting.getId());
                     aiTaskService.dispatchSummaryTask(meeting.getId(), meeting.getTenantId(), meeting.getCreatorId());
                 }

backend/src/main/java/com/imeeting/mapper/biz/MeetingMapper.java

@@ -39,6 +39,7 @@ public interface MeetingMapper extends BaseMapper<Meeting> {
         FROM biz_meetings
         WHERE tenant_id = #{tenantId}
           AND source_device_code = #{deviceCode}
+          AND status=3
           AND is_deleted = 0
         <if test="resetAt != null">
             AND created_at &gt;= #{resetAt}

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

@@ -12,6 +12,7 @@ import com.imeeting.entity.biz.AiTask;
 import com.imeeting.entity.biz.LlmModel;
 import com.imeeting.entity.biz.Meeting;
 import com.imeeting.entity.biz.MeetingTranscript;
+import com.imeeting.enums.MeetingStatusEnum;
 import com.imeeting.mapper.biz.LlmModelMapper;
 import com.imeeting.mapper.biz.MeetingTranscriptMapper;
 import com.imeeting.service.android.legacy.LegacyMeetingAdapterService;
@@ -183,7 +184,7 @@ public class LegacyMeetingAdapterServiceImpl implements LegacyMeetingAdapterServ
             meeting.setAudioSaveStatus(RealtimeMeetingAudioStorageService.STATUS_SUCCESS);
             meeting.setAudioSaveMessage(null);
             meeting.setOfflineRecordingStatus(MeetingConstants.OFFLINE_RECORDING_UPLOAD_FINISHED);
-            meeting.setStatus(1);
+            meeting.setStatus(MeetingStatusEnum.TRANSCRIBING.getCode());
             meetingService.updateById(meeting);
 
             resetOrCreateAsrTask(meetingId, profile);
@@ -252,7 +253,7 @@ public class LegacyMeetingAdapterServiceImpl implements LegacyMeetingAdapterServ
             meeting.setAudioSaveStatus(RealtimeMeetingAudioStorageService.STATUS_SUCCESS);
             meeting.setAudioSaveMessage(null);
             meeting.setOfflineRecordingStatus(MeetingConstants.OFFLINE_RECORDING_UPLOAD_FINISHED);
-            meeting.setStatus(1);
+            meeting.setStatus(MeetingStatusEnum.TRANSCRIBING.getCode());
             meetingService.updateById(meeting);
 
             resetOrCreateAsrTask(meetingId, profile);

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

@@ -14,6 +14,7 @@ import com.imeeting.entity.biz.AiTask;
 import com.imeeting.entity.biz.HotWord;
 import com.imeeting.entity.biz.Meeting;
 import com.imeeting.entity.biz.MeetingTranscript;
+import com.imeeting.enums.MeetingStatusEnum;
 import com.imeeting.mapper.biz.AiTaskMapper;
 import com.imeeting.mapper.biz.MeetingMapper;
 import com.imeeting.mapper.biz.MeetingTranscriptMapper;
@@ -953,7 +954,7 @@ public class AiTaskServiceImpl extends ServiceImpl<AiTaskMapper, AiTask> impleme
 
             Files.writeString(filePath, markdownContent, StandardCharsets.UTF_8);
 
-            boolean alreadyCompleted = Integer.valueOf(3).equals(meeting.getStatus());
+            boolean alreadyCompleted = MeetingStatusEnum.isCode(meeting.getStatus(), MeetingStatusEnum.COMPLETED);
             taskRecord.setResultFilePath("meetings/" + meeting.getId() + "/summaries/" + fileName);
             Map<String, Object> responseData = objectMapper.convertValue(respNode, Map.class);
             responseData.put("summarySource", summarySource.toSnapshot());
@@ -1206,22 +1207,22 @@ public class AiTaskServiceImpl extends ServiceImpl<AiTaskMapper, AiTask> impleme
         int meetingStatus;
         if (percent < 0) {
             stage = MeetingProgressStage.FAILED;
-            meetingStatus = 4;
+            meetingStatus = MeetingStatusEnum.FAILED.getCode();
         } else if (percent >= 100) {
             stage = MeetingProgressStage.COMPLETED;
-            meetingStatus = 3;
+            meetingStatus = MeetingStatusEnum.COMPLETED.getCode();
         } else if (percent >= 90) {
             stage = MeetingProgressStage.SUMMARY_RUNNING;
-            meetingStatus = 2;
+            meetingStatus = MeetingStatusEnum.SUMMARIZING.getCode();
         } else if (percent >= 85) {
             stage = MeetingProgressStage.CHAPTER_RUNNING;
-            meetingStatus = 2;
+            meetingStatus = MeetingStatusEnum.SUMMARIZING.getCode();
         } else if (percent >= 5) {
             stage = MeetingProgressStage.ASR_RUNNING;
-            meetingStatus = 1;
+            meetingStatus = MeetingStatusEnum.TRANSCRIBING.getCode();
         } else {
             stage = MeetingProgressStage.QUEUED;
-            meetingStatus = 1;
+            meetingStatus = MeetingStatusEnum.TRANSCRIBING.getCode();
         }
         meetingProgressService.markStage(meetingId, findLatestTaskForProgress(meetingId), meetingStatus, stage, percent, msg, eta);
     }

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

@@ -27,6 +27,7 @@ import com.imeeting.entity.biz.HotWord;
 import com.imeeting.entity.biz.Meeting;
 import com.imeeting.entity.biz.MeetingTranscript;
 import com.imeeting.entity.biz.MeetingTranscriptChapterVersion;
+import com.imeeting.enums.MeetingStatusEnum;
 import com.imeeting.service.android.AndroidMeetingPushService;
 import com.imeeting.service.android.AndroidPendingMeetingDraftService;
 import com.imeeting.service.android.AndroidPushMessageService;
@@ -485,7 +486,7 @@ public class MeetingCommandServiceImpl implements MeetingCommandService {
         }
 
         realtimeMeetingSessionStateService.clear(meetingId);
-        meeting.setStatus(2);
+        meeting.setStatus(MeetingStatusEnum.SUMMARIZING.getCode());
         meetingService.updateById(meeting);
         updateMeetingProgress(meetingId, 85, "正在生成 AI 目录与总结...", 0);
         meetingDomainSupport.prewarmPlaybackAudioAfterCommit(meeting.getAudioUrl());
@@ -824,7 +825,7 @@ public class MeetingCommandServiceImpl implements MeetingCommandService {
                     "RESUMMARY"
             );
             meeting.setLatestSummaryTaskId(createdSummaryTask.getId());
-            meeting.setStatus(2);
+            meeting.setStatus(MeetingStatusEnum.SUMMARIZING.getCode());
             meetingService.updateById(meeting);
             aiTaskService.dispatchSummaryTask(meeting.getId(), meeting.getTenantId(), meeting.getCreatorId());
 
@@ -885,7 +886,7 @@ public class MeetingCommandServiceImpl implements MeetingCommandService {
         aiTaskService.updateById(summaryTask);
         meetingPointsService.recordSummarySuccessCharge(meeting, summaryTask);
 
-        boolean alreadyCompleted = Integer.valueOf(3).equals(meeting.getStatus());
+        boolean alreadyCompleted = MeetingStatusEnum.isCode(meeting.getStatus(), MeetingStatusEnum.COMPLETED);
         meeting.setLatestSummaryTaskId(summaryTask.getId());
         meetingService.updateById(meeting);
         aiTaskService.reconcileMeetingStatus(meeting.getId());
@@ -1012,7 +1013,7 @@ public class MeetingCommandServiceImpl implements MeetingCommandService {
                 "RESUMMARY"
         );
         meeting.setSummaryDetailLevel(effectiveSummaryDetailLevel);
-        meeting.setStatus(2);
+        meeting.setStatus(MeetingStatusEnum.SUMMARIZING.getCode());
         meetingService.updateById(meeting);
         if ("EXTERNAL_N8N".equalsIgnoreCase(summaryOrchestrationMode)) {
             updateMeetingProgress(meetingId, 95, "等待外部总结编排...", 0);
@@ -1047,7 +1048,7 @@ public class MeetingCommandServiceImpl implements MeetingCommandService {
         if (asrTask == null || asrTask.getTaskConfig() == null || asrTask.getTaskConfig().get("asrModelId") == null) {
             throw new RuntimeException("未找到可用的识别任务配置");
         }
-        if (Integer.valueOf(1).equals(asrTask.getStatus()) && !Integer.valueOf(4).equals(meeting.getStatus())) {
+        if (Integer.valueOf(1).equals(asrTask.getStatus()) && !MeetingStatusEnum.isCode(meeting.getStatus(), MeetingStatusEnum.FAILED)) {
             throw new RuntimeException("当前会议转写任务仍在处理中，请勿重复重试");
         }
 
@@ -1087,7 +1088,7 @@ public class MeetingCommandServiceImpl implements MeetingCommandService {
         resetAiTask(summaryTask, new HashMap<>(summaryTask.getTaskConfig()));
         aiTaskService.updateById(summaryTask);
 
-        meeting.setStatus(1);
+        meeting.setStatus(MeetingStatusEnum.TRANSCRIBING.getCode());
         meetingService.updateById(meeting);
         clearLegacyDispatchState(meetingId);
         updateMeetingProgress(meetingId, 0, "已重新提交识别任务，等待 ASR 处理...", 0);
@@ -1101,7 +1102,7 @@ public class MeetingCommandServiceImpl implements MeetingCommandService {
         if (meeting == null) {
             throw new RuntimeException("会议不存在");
         }
-        if (meeting.getStatus() == 2) {
+        if (MeetingStatusEnum.isCode(meeting.getStatus(), MeetingStatusEnum.SUMMARIZING)) {
             throw new RuntimeException("当前会议仍在处理中，请稍后再试");
         }
         long transcriptCount = transcriptMapper.selectCount(new LambdaQueryWrapper<MeetingTranscript>()
@@ -1122,7 +1123,7 @@ public class MeetingCommandServiceImpl implements MeetingCommandService {
         }
         resetAiTask(summaryTask, new HashMap<>(summaryTask.getTaskConfig()));
         aiTaskService.updateById(summaryTask);
-        meeting.setStatus(2);
+        meeting.setStatus(MeetingStatusEnum.SUMMARIZING.getCode());
         meetingService.updateById(meeting);
         updateMeetingProgress(meetingId, 90, "已重新提交总结任务，正在生成总结...", 0);
         dispatchSummaryTaskAfterCommit(meetingId, meeting.getTenantId(), meeting.getCreatorId());
@@ -1135,7 +1136,7 @@ public class MeetingCommandServiceImpl implements MeetingCommandService {
         if (meeting == null) {
             throw new RuntimeException("会议不存在");
         }
-        if (meeting.getStatus() == 2) {
+        if (MeetingStatusEnum.isCode(meeting.getStatus(), MeetingStatusEnum.SUMMARIZING)) {
             throw new RuntimeException("当前会议仍在处理中，请稍后再试");
         }
         long transcriptCount = transcriptMapper.selectCount(new LambdaQueryWrapper<MeetingTranscript>()
@@ -1156,7 +1157,7 @@ public class MeetingCommandServiceImpl implements MeetingCommandService {
         }
         resetAiTask(chapterTask, new HashMap<>(chapterTask.getTaskConfig()));
         aiTaskService.updateById(chapterTask);
-        meeting.setStatus(2);
+        meeting.setStatus(MeetingStatusEnum.SUMMARIZING.getCode());
         meetingService.updateById(meeting);
         updateMeetingProgress(meetingId, 85, "已重新提交 AI 目录任务，正在生成目录...", 0);
         dispatchChapterTaskAfterCommit(meetingId, meeting.getTenantId(), meeting.getCreatorId());
@@ -1340,22 +1341,22 @@ public class MeetingCommandServiceImpl implements MeetingCommandService {
         int meetingStatus;
         if (percent < 0) {
             stage = com.imeeting.common.MeetingProgressStage.FAILED;
-            meetingStatus = 4;
+            meetingStatus = MeetingStatusEnum.FAILED.getCode();
         } else if (percent >= 100) {
             stage = com.imeeting.common.MeetingProgressStage.COMPLETED;
-            meetingStatus = 3;
+            meetingStatus = MeetingStatusEnum.COMPLETED.getCode();
         } else if (percent >= 90) {
             stage = com.imeeting.common.MeetingProgressStage.SUMMARY_RUNNING;
-            meetingStatus = 2;
+            meetingStatus = MeetingStatusEnum.SUMMARIZING.getCode();
         } else if (percent >= 85) {
             stage = com.imeeting.common.MeetingProgressStage.CHAPTER_RUNNING;
-            meetingStatus = 2;
+            meetingStatus = MeetingStatusEnum.SUMMARIZING.getCode();
         } else if (percent >= 5) {
             stage = com.imeeting.common.MeetingProgressStage.ASR_RUNNING;
-            meetingStatus = 1;
+            meetingStatus = MeetingStatusEnum.TRANSCRIBING.getCode();
         } else {
             stage = com.imeeting.common.MeetingProgressStage.QUEUED;
-            meetingStatus = 1;
+            meetingStatus = MeetingStatusEnum.TRANSCRIBING.getCode();
         }
         meetingProgressService.markStageAfterCommitOrNow(meetingId, null, meetingStatus, stage, percent, message, eta);
     }

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

@@ -568,25 +568,32 @@ public class MeetingDomainSupport {
         );
         try {
             ProcessBuilder processBuilder = new ProcessBuilder(command);
-            processBuilder.redirectErrorStream(true);
             Process process = processBuilder.start();
-            byte[] output;
+            byte[] stdout;
-            try (InputStream processStream = process.getInputStream()) {
+            byte[] stderr;
-                output = processStream.readAllBytes();
+            try (InputStream stdoutStream = process.getInputStream();
+                 InputStream stderrStream = process.getErrorStream()) {
+                stdout = stdoutStream.readAllBytes();
+                stderr = stderrStream.readAllBytes();
             }
             if (!process.waitFor(30, TimeUnit.SECONDS)) {
                 process.destroyForcibly();
                 return null;
             }
-            if (process.exitValue() != 0) {
+            String stdoutText = new String(stdout, StandardCharsets.UTF_8).trim();
-                return null;
+            String stderrText = new String(stderr, StandardCharsets.UTF_8).trim();
+            Double duration = extractDurationSeconds(stdoutText);
+            if (duration == null) {
+                duration = extractDurationSeconds(stderrText);
             }
-            String raw = new String(output, StandardCharsets.UTF_8).trim();
+            if (duration != null && duration > 0D) {
-            if (raw.isBlank()) {
+                return (int) Math.ceil(duration);
-                return null;
             }
-            double duration = Double.parseDouble(raw);
+            if (process.exitValue() != 0 || !stderrText.isBlank() || !stdoutText.isBlank()) {
-            return duration > 0 ? (int) Math.ceil(duration) : null;
+                log.warn("ffprobe returned no parsable duration, path={}, exitCode={}, stdout={}, stderr={}",
+                        audioPath, process.exitValue(), stdoutText, stderrText);
+            }
+            return null;
         } catch (Exception ex) {
             log.warn("ffprobe failed to resolve audio duration from path={}", audioPath, ex);
             return null;
@@ -599,12 +606,21 @@ public class MeetingDomainSupport {
         }
         String trimmed = ffmpegPath.trim();
         try {
-            Path ffmpeg = Paths.get(trimmed);
+            Path configuredPath = Paths.get(trimmed);
-            Path fileName = ffmpeg.getFileName();
+            if (Files.isDirectory(configuredPath)) {
+                Path ffprobeInDir = configuredPath.resolve(isWindowsLikePath(trimmed) ? "ffprobe.exe" : "ffprobe");
+                if (Files.exists(ffprobeInDir)) {
+                    return ffprobeInDir.toString();
+                }
+            }
+            Path fileName = configuredPath.getFileName();
             if (fileName != null) {
                 String normalizedName = fileName.toString().toLowerCase();
+                if ("ffprobe".equals(normalizedName) || "ffprobe.exe".equals(normalizedName)) {
+                    return configuredPath.toString();
+                }
                 if ("ffmpeg".equals(normalizedName) || "ffmpeg.exe".equals(normalizedName)) {
-                    Path sibling = ffmpeg.resolveSibling(normalizedName.endsWith(".exe") ? "ffprobe.exe" : "ffprobe");
+                    Path sibling = configuredPath.resolveSibling(normalizedName.endsWith(".exe") ? "ffprobe.exe" : "ffprobe");
                     if (Files.exists(sibling)) {
                         return sibling.toString();
                     }
@@ -616,6 +632,29 @@ public class MeetingDomainSupport {
         return "ffprobe";
     }
 
+    private Double extractDurationSeconds(String rawOutput) {
+        if (rawOutput == null || rawOutput.isBlank()) {
+            return null;
+        }
+        String[] lines = rawOutput.split("\\R");
+        for (int i = lines.length - 1; i >= 0; i--) {
+            String candidate = lines[i] == null ? null : lines[i].trim();
+            if (candidate == null || candidate.isEmpty()) {
+                continue;
+            }
+            try {
+                return Double.parseDouble(candidate);
+            } catch (NumberFormatException ignored) {
+                // Keep scanning upward until a numeric duration line is found.
+            }
+        }
+        return null;
+    }
+
+    private boolean isWindowsLikePath(String path) {
+        return path != null && path.contains("\\");
+    }
+
     private Path resolvePublicAudioPath(String audioUrl) {
         if (audioUrl == null || audioUrl.isBlank()) {
             return null;

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

@@ -8,6 +8,7 @@ import com.imeeting.dto.biz.MeetingVO;
 import com.imeeting.dto.biz.UnifiedMeetingStatusVO;
 import com.imeeting.entity.biz.AiTask;
 import com.imeeting.entity.biz.Meeting;
+import com.imeeting.enums.MeetingStatusEnum;
 import com.imeeting.mapper.biz.AiTaskMapper;
 import com.imeeting.mapper.biz.MeetingMapper;
 import com.imeeting.service.android.AndroidMeetingPushService;
@@ -222,10 +223,10 @@ public class MeetingProgressServiceImpl implements MeetingProgressService {
                 .eq(AiTask::getMeetingId, meetingId)
                 .orderByDesc(AiTask::getId)
                 .last("LIMIT 1"));
-        if (meeting.getStatus() != null && meeting.getStatus() == 3) {
+        if (MeetingStatusEnum.isCode(meeting.getStatus(), MeetingStatusEnum.COMPLETED)) {
             return buildSnapshot(meetingId, latestTask, meeting.getStatus(), MeetingProgressStage.COMPLETED, 100, "处理完成", 0);
         }
-        if (meeting.getStatus() != null && meeting.getStatus() == 4) {
+        if (MeetingStatusEnum.isCode(meeting.getStatus(), MeetingStatusEnum.FAILED)) {
             String message = latestTask != null && latestTask.getErrorMsg() != null && !latestTask.getErrorMsg().isBlank()
                     ? latestTask.getErrorMsg()
                     : "处理失败";

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

@@ -10,6 +10,7 @@ import com.imeeting.dto.biz.MeetingVO;
 import com.imeeting.entity.biz.AiTask;
 import com.imeeting.entity.biz.Meeting;
 import com.imeeting.entity.biz.MeetingTranscript;
+import com.imeeting.enums.MeetingStatusEnum;
 import com.imeeting.service.biz.AiTaskService;
 import com.imeeting.mapper.biz.MeetingMapper;
 import com.imeeting.mapper.biz.MeetingTranscriptMapper;
@@ -186,12 +187,18 @@ public class MeetingQueryServiceImpl implements MeetingQueryService {
         }
 
         stats.put("totalMeetings", meetingService.count(baseWrapper.clone()));
-        stats.put("processingTasks", meetingService.count(baseWrapper.clone().in(Meeting::getStatus, 1, 2)));
+        stats.put("processingTasks", meetingService.count(baseWrapper.clone().in(
+                Meeting::getStatus,
+                MeetingStatusEnum.codesOf(MeetingStatusEnum.TRANSCRIBING, MeetingStatusEnum.SUMMARIZING)
+        )));
         LocalDateTime todayStart = LocalDateTime.now().withHour(0).withMinute(0).withSecond(0);
         stats.put("todayNew", meetingService.count(baseWrapper.clone().ge(Meeting::getCreatedAt, todayStart)));
 
-        long totalFinished = meetingService.count(baseWrapper.clone().in(Meeting::getStatus, 3, 4));
+        long totalFinished = meetingService.count(baseWrapper.clone().in(
-        long success = meetingService.count(baseWrapper.clone().eq(Meeting::getStatus, 3));
+                Meeting::getStatus,
+                MeetingStatusEnum.codesOf(MeetingStatusEnum.COMPLETED, MeetingStatusEnum.FAILED)
+        ));
+        long success = meetingService.count(baseWrapper.clone().eq(Meeting::getStatus, MeetingStatusEnum.COMPLETED.getCode()));
         stats.put("successRate", totalFinished == 0 ? 100 : (int) ((double) success / totalFinished * 100));
         return stats;
     }

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

@@ -10,6 +10,7 @@ import com.imeeting.entity.biz.AiTask;
 import com.imeeting.entity.biz.Meeting;
 import com.imeeting.entity.biz.MeetingTranscript;
 import com.imeeting.entity.biz.MeetingTranscriptChapterVersion;
+import com.imeeting.enums.MeetingStatusEnum;
 import com.imeeting.mapper.biz.AiTaskMapper;
 import com.imeeting.mapper.biz.MeetingMapper;
 import com.imeeting.mapper.biz.MeetingTranscriptChapterVersionMapper;
@@ -80,7 +81,7 @@ public class MeetingUnifiedStatusServiceImpl implements MeetingUnifiedStatusServ
         if (meeting == null) {
             return UnifiedMeetingStatusStage.INITIALIZING;
         }
-        if (Integer.valueOf(3).equals(meeting.getStatus())) {
+        if (MeetingStatusEnum.isCode(meeting.getStatus(), MeetingStatusEnum.COMPLETED)) {
             return UnifiedMeetingStatusStage.COMPLETED;
         }
         UnifiedMeetingStatusStage stageFromSnapshot = resolveStageFromSnapshot(snapshot);
@@ -117,7 +118,7 @@ public class MeetingUnifiedStatusServiceImpl implements MeetingUnifiedStatusServ
     }
 
     private UnifiedMeetingStatusStage resolveFailedStage(MeetingVO meeting) {
-        if (meeting == null || !Integer.valueOf(4).equals(meeting.getStatus())) {
+        if (meeting == null || !MeetingStatusEnum.isCode(meeting.getStatus(), MeetingStatusEnum.FAILED)) {
             return null;
         }
 

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

@@ -6,6 +6,7 @@ import com.imeeting.dto.biz.RealtimeMeetingSessionState;
 import com.imeeting.dto.biz.RealtimeMeetingSessionStatusVO;
 import com.imeeting.entity.biz.Meeting;
 import com.imeeting.entity.biz.MeetingTranscript;
+import com.imeeting.enums.MeetingStatusEnum;
 import com.imeeting.mapper.biz.MeetingMapper;
 import com.imeeting.mapper.biz.MeetingTranscriptMapper;
 import com.imeeting.service.biz.RealtimeMeetingSessionStateService;
@@ -299,7 +300,7 @@ public class RealtimeMeetingSessionStateServiceImpl implements RealtimeMeetingSe
             return vo;
         }
 
-        if (Integer.valueOf(2).equals(meeting.getStatus())) {
+        if (MeetingStatusEnum.isCode(meeting.getStatus(), MeetingStatusEnum.SUMMARIZING)) {
             vo.setStatus("COMPLETING");
         } else if (isDatabaseTerminalStatus(meeting.getStatus())) {
             vo.setStatus("COMPLETED");
@@ -322,7 +323,8 @@ public class RealtimeMeetingSessionStateServiceImpl implements RealtimeMeetingSe
     }
 
     private boolean isDatabaseTerminalStatus(Integer status) {
-        return Integer.valueOf(3).equals(status) || Integer.valueOf(4).equals(status);
+        return MeetingStatusEnum.isCode(status, MeetingStatusEnum.COMPLETED)
+                || MeetingStatusEnum.isCode(status, MeetingStatusEnum.FAILED);
     }
 
     private boolean isRedisTerminalStatus(String status) {

backend/src/main/java/com/imeeting/service/mcp/MeetingMcpToolService.java

@@ -17,6 +17,7 @@ import com.imeeting.dto.biz.MeetingVO;
 import com.imeeting.entity.biz.AiTask;
 import com.imeeting.entity.biz.Meeting;
 import com.imeeting.entity.biz.PromptTemplate;
+import com.imeeting.enums.MeetingStatusEnum;
 import com.imeeting.service.biz.AiTaskService;
 import com.imeeting.service.biz.MeetingAccessService;
 import com.imeeting.service.biz.MeetingProgressService;
@@ -188,7 +189,7 @@ public class MeetingMcpToolService {
         AiTask asrTask = findLatestTask(meetingId, "ASR");
         AiTask summaryTask = findLatestTask(meetingId, "SUMMARY");
         boolean summaryCompleted = summaryTask != null && Integer.valueOf(2).equals(summaryTask.getStatus());
-        MeetingVO detail = (Integer.valueOf(3).equals(meeting.getStatus()) || summaryCompleted)
+        MeetingVO detail = (MeetingStatusEnum.isCode(meeting.getStatus(), MeetingStatusEnum.COMPLETED) || summaryCompleted)
                 ? meetingQueryService.getDetail(meetingId)
                 : null;
         boolean hasSummary = detail != null && detail.getSummaryContent() != null && !detail.getSummaryContent().isBlank();
@@ -340,7 +341,7 @@ public class MeetingMcpToolService {
         AiTask summaryTask = findLatestTask(meetingId, "SUMMARY");
         boolean summaryCompleted = summaryTask != null && Integer.valueOf(2).equals(summaryTask.getStatus());
 
-        if (Integer.valueOf(3).equals(meeting.getStatus()) || summaryCompleted) {
+        if (MeetingStatusEnum.isCode(meeting.getStatus(), MeetingStatusEnum.COMPLETED) || summaryCompleted) {
             return new LegacyMeetingProcessingStatusResponse("completed", 100, STAGE_COMPLETED);
         }
         if (isFailed(asrTask)) {