feat: 添加旧版Android API支持和会议预览功能

- 添加 `LegacyLoginResponse`, `LegacyRefreshTokenResponse`, `LegacyLoginUserResponse` 和 `LegacyMeetingTagResponse` DTO
- 添加 `LegacyAuthController` 以处理旧版登录和刷新令牌请求
- 更新 `MeetingAccessServiceImpl` 中的异常信息为英文
- 在前端 `MeetingPreview.tsx` 中添加多语言文本和分享功能

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

@@ -0,0 +1,96 @@
+package com.imeeting.controller.android.legacy;
+
+import com.imeeting.dto.android.legacy.LegacyApiResponse;
+import com.imeeting.dto.android.legacy.LegacyLoginResponse;
+import com.imeeting.dto.android.legacy.LegacyLoginUserResponse;
+import com.imeeting.dto.android.legacy.LegacyRefreshTokenResponse;
+import com.unisbase.dto.LoginRequest;
+import com.unisbase.dto.RefreshRequest;
+import com.unisbase.dto.SysRoleDTO;
+import com.unisbase.dto.SysUserDTO;
+import com.unisbase.dto.TokenResponse;
+import com.unisbase.service.AuthService;
+import jakarta.validation.Valid;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestHeader;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.util.StringUtils;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/api/auth")
+@RequiredArgsConstructor
+public class LegacyAuthController {
+
+    private final AuthService authService;
+
+    @PostMapping("/login")
+    public LegacyApiResponse<LegacyLoginResponse> login(@Valid @RequestBody LoginRequest request) {
+        TokenResponse tokenResponse = authService.login(request, true);
+        return LegacyApiResponse.ok(new LegacyLoginResponse(
+                tokenResponse.getAccessToken(),
+                tokenResponse.getRefreshToken(),
+                toLegacyUser(tokenResponse.getUser())
+        ));
+    }
+
+    @PostMapping("/refresh")
+    public LegacyApiResponse<LegacyRefreshTokenResponse> refresh(@RequestBody(required = false) RefreshRequest request,
+                                                                 @RequestHeader(value = "Authorization", required = false) String authorization,
+                                                                 @RequestHeader(value = "X-Android-Access-Token", required = false) String androidAccessToken) {
+        TokenResponse tokenResponse = authService.refresh(resolveRefreshToken(request, authorization, androidAccessToken));
+        return LegacyApiResponse.ok(new LegacyRefreshTokenResponse(tokenResponse.getAccessToken(),tokenResponse.getRefreshToken()));
+    }
+
+    private LegacyLoginUserResponse toLegacyUser(SysUserDTO user) {
+        if (user == null) {
+            return null;
+        }
+        SysRoleDTO primaryRole = resolvePrimaryRole(user);
+        return new LegacyLoginUserResponse(
+                user.getUserId(),
+                user.getUsername(),
+                user.getDisplayName(),
+                user.getAvatarUrl(),
+                user.getEmail(),
+                primaryRole == null ? null : primaryRole.getRoleId(),
+                primaryRole == null ? null : primaryRole.getRoleName(),
+                user.getCreatedAt()
+        );
+    }
+
+    private SysRoleDTO resolvePrimaryRole(SysUserDTO user) {
+        List<SysRoleDTO> roles = user.getRoles();
+        if (roles != null && !roles.isEmpty()) {
+            return roles.get(0);
+        }
+        List<Long> roleIds = user.getRoleIds();
+        if (roleIds != null && !roleIds.isEmpty()) {
+            SysRoleDTO role = new SysRoleDTO();
+            role.setRoleId(roleIds.get(0));
+            return role;
+        }
+        return null;
+    }
+
+    private String resolveRefreshToken(RefreshRequest request, String authorization, String androidAccessToken) {
+        if (request != null && StringUtils.hasText(request.getRefreshToken())) {
+            return request.getRefreshToken().trim();
+        }
+        if (StringUtils.hasText(androidAccessToken)) {
+            return androidAccessToken.trim();
+        }
+        if (StringUtils.hasText(authorization)) {
+            String value = authorization.trim();
+            if (value.startsWith("Bearer ")) {
+                return value.substring(7).trim();
+            }
+            return value;
+        }
+        throw new IllegalArgumentException("refreshToken不能为空");
+    }
+}

backend/src/main/java/com/imeeting/controller/biz/MeetingPublicPreviewController.java

@@ -0,0 +1,53 @@
+package com.imeeting.controller.biz;
+
+import com.imeeting.dto.biz.MeetingPreviewAccessVO;
+import com.imeeting.dto.biz.PublicMeetingPreviewVO;
+import com.imeeting.entity.biz.Meeting;
+import com.imeeting.service.biz.MeetingAccessService;
+import com.imeeting.service.biz.MeetingQueryService;
+import com.unisbase.common.ApiResponse;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api/public/meetings")
+public class MeetingPublicPreviewController {
+
+    private final MeetingQueryService meetingQueryService;
+    private final MeetingAccessService meetingAccessService;
+
+    public MeetingPublicPreviewController(MeetingQueryService meetingQueryService,
+                                          MeetingAccessService meetingAccessService) {
+        this.meetingQueryService = meetingQueryService;
+        this.meetingAccessService = meetingAccessService;
+    }
+
+    @GetMapping("/{id}/preview/access")
+    public ApiResponse<MeetingPreviewAccessVO> getPreviewAccess(@PathVariable Long id) {
+        try {
+            Meeting meeting = meetingAccessService.requireMeeting(id);
+            return ApiResponse.ok(new MeetingPreviewAccessVO(meetingAccessService.isPreviewPasswordRequired(meeting)));
+        } catch (RuntimeException ex) {
+            return ApiResponse.error(ex.getMessage());
+        }
+    }
+
+    @GetMapping("/{id}/preview")
+    public ApiResponse<PublicMeetingPreviewVO> getPreview(@PathVariable Long id,
+                                                          @RequestParam(required = false) String accessPassword) {
+        try {
+            Meeting meeting = meetingAccessService.requireMeeting(id);
+            meetingAccessService.assertCanPreviewMeeting(meeting, accessPassword);
+
+            PublicMeetingPreviewVO data = new PublicMeetingPreviewVO();
+            data.setMeeting(meetingQueryService.getDetail(id));
+            data.setTranscripts(meetingQueryService.getTranscripts(id));
+            return ApiResponse.ok(data);
+        } catch (RuntimeException ex) {
+            return ApiResponse.error(ex.getMessage());
+        }
+    }
+}

backend/src/main/java/com/imeeting/dto/android/legacy/LegacyLoginResponse.java

@@ -0,0 +1,14 @@
+package com.imeeting.dto.android.legacy;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class LegacyLoginResponse {
+    private String token;
+    private String refreshToken;
+    private LegacyLoginUserResponse user;
+}

backend/src/main/java/com/imeeting/dto/android/legacy/LegacyLoginUserResponse.java

@@ -0,0 +1,21 @@
+package com.imeeting.dto.android.legacy;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+import java.time.LocalDateTime;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class LegacyLoginUserResponse {
+    private Long user_id;
+    private String username;
+    private String caption;
+    private String avatar_url;
+    private String email;
+    private Long role_id;
+    private String role_name;
+    private LocalDateTime created_at;
+}

backend/src/main/java/com/imeeting/dto/android/legacy/LegacyMeetingTagResponse.java

@@ -0,0 +1,13 @@
+package com.imeeting.dto.android.legacy;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class LegacyMeetingTagResponse {
+    private Long id;
+    private String name;
+}

backend/src/main/java/com/imeeting/dto/android/legacy/LegacyRefreshTokenResponse.java

@@ -0,0 +1,13 @@
+package com.imeeting.dto.android.legacy;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class LegacyRefreshTokenResponse {
+    private String token;
+    private String refreshToken;
+}

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

@@ -0,0 +1,10 @@
+package com.imeeting.dto.biz;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+@Data
+@AllArgsConstructor
+public class MeetingPreviewAccessVO {
+    private boolean passwordRequired;
+}

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

@@ -0,0 +1,11 @@
+package com.imeeting.dto.biz;
+
+import lombok.Data;
+
+import java.util.List;
+
+@Data
+public class PublicMeetingPreviewVO {
+    private MeetingVO meeting;
+    private List<MeetingTranscriptVO> transcripts;
+}

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

@@ -17,7 +17,7 @@ public class MeetingAccessServiceImpl implements MeetingAccessService {
     public Meeting requireMeeting(Long meetingId) {
         Meeting meeting = meetingMapper.selectById(meetingId);
         if (meeting == null) {
-            throw new RuntimeException("会议不存在");
+            throw new RuntimeException("Meeting not found");
         }
         return meeting;
     }
@@ -35,10 +35,10 @@ public class MeetingAccessServiceImpl implements MeetingAccessService {
         }
         String providedPassword = normalizePreviewPassword(accessPassword);
         if (providedPassword == null) {
-            throw new RuntimeException("该会议需要访问密码");
+            throw new RuntimeException("Access password is required");
         }
         if (!expectedPassword.equals(providedPassword)) {
-            throw new RuntimeException("访问密码错误");
+            throw new RuntimeException("Access password is incorrect");
         }
     }
 
@@ -48,7 +48,7 @@ public class MeetingAccessServiceImpl implements MeetingAccessService {
             return;
         }
         if (!isSameTenant(meeting, loginUser)) {
-            throw new RuntimeException("无权查看此会议");
+            throw new RuntimeException("No permission to view this meeting");
         }
         if (isTenantAdmin(loginUser)) {
             return;
@@ -56,7 +56,7 @@ public class MeetingAccessServiceImpl implements MeetingAccessService {
         if (isCreator(meeting, loginUser) || isParticipant(meeting, loginUser)) {
             return;
         }
-        throw new RuntimeException("无权查看此会议");
+        throw new RuntimeException("No permission to view this meeting");
     }
 
     @Override
@@ -65,12 +65,12 @@ public class MeetingAccessServiceImpl implements MeetingAccessService {
             return;
         }
         if (!isSameTenant(meeting, loginUser)) {
-            throw new RuntimeException("无权修改此会议");
+            throw new RuntimeException("No permission to edit this meeting");
         }
         if (isTenantAdmin(loginUser) || isCreator(meeting, loginUser)) {
             return;
         }
-        throw new RuntimeException("无权修改此会议");
+        throw new RuntimeException("No permission to edit this meeting");
     }
 
     @Override
@@ -79,12 +79,12 @@ public class MeetingAccessServiceImpl implements MeetingAccessService {
             return;
         }
         if (!isSameTenant(meeting, loginUser)) {
-            throw new RuntimeException("无权操作此实时会议");
+            throw new RuntimeException("No permission to manage this realtime meeting");
         }
         if (isTenantAdmin(loginUser) || isCreator(meeting, loginUser)) {
             return;
         }
-        throw new RuntimeException("无权操作此实时会议");
+        throw new RuntimeException("No permission to manage this realtime meeting");
     }
 
     @Override
@@ -93,12 +93,12 @@ public class MeetingAccessServiceImpl implements MeetingAccessService {
             return;
         }
         if (!isSameTenant(meeting, loginUser)) {
-            throw new RuntimeException("无权导出此会议");
+            throw new RuntimeException("No permission to export this meeting");
         }
         if (isTenantAdmin(loginUser) || isCreator(meeting, loginUser) || isParticipant(meeting, loginUser)) {
             return;
         }
-        throw new RuntimeException("无权导出此会议");
+        throw new RuntimeException("No permission to export this meeting");
     }
 
     private boolean isPlatformAdmin(LoginUser loginUser) {

backend/src/main/resources/application.yml

@@ -50,6 +50,7 @@ unisbase:
     token-prefix: "Bearer "
     permit-all-urls:
       - /actuator/health
+      - /api/auth/**
       - /api/static/**
       - /api/public/meetings/**
       - /ws/**

frontend/src/pages/business/MeetingPreview.css

@@ -151,6 +151,23 @@
   letter-spacing: -0.04em;
 }
 
+.meeting-preview-title-number {
+  font-family: "Segoe UI", "SF Pro Display", "Helvetica Neue", sans-serif;
+  font-variant-numeric: lining-nums proportional-nums;
+  letter-spacing: -0.02em;
+}
+
+.meeting-preview-hero-toolbar {
+  display: grid;
+  gap: 18px;
+}
+
+.meeting-preview-hero-actions {
+  display: flex;
+  flex-wrap: wrap;
+  gap: 12px;
+}
+
 .meeting-preview-subtitle {
   margin: 14px 0 0;
   color: var(--preview-muted);
@@ -193,6 +210,19 @@
   margin-top: 18px;
 }
 
+.meeting-preview-page-tabs .ant-tabs-nav {
+  margin-bottom: 18px;
+}
+
+.meeting-preview-page-tabs .ant-tabs-tab {
+  font-weight: 600;
+}
+
+.meeting-preview-tab-panel {
+  display: grid;
+  gap: 18px;
+}
+
 .meeting-preview-section {
   padding: 22px 18px;
 }
@@ -501,10 +531,17 @@
 }
 
 .meeting-preview-transcript-item.is-active {
+  transform: translateY(-2px);
   border-color: rgba(184, 100, 50, 0.28);
+  box-shadow: 0 12px 26px rgba(105, 72, 40, 0.08);
   background: linear-gradient(180deg, rgba(255, 255, 255, 0.88), rgba(255, 244, 235, 0.92));
 }
 
+.meeting-preview-transcript-item.is-active .meeting-preview-transcript-copy {
+  color: #5a3113;
+  font-weight: 600;
+}
+
 .meeting-preview-transcript-head {
   display: flex;
   align-items: center;
@@ -589,3 +626,10 @@
     gap: 22px;
   }
 }
+
+@media (max-width: 767px) {
+  .meeting-preview-hero-actions {
+    display: grid;
+    grid-template-columns: 1fr;
+  }
+}