diff --git a/backend/src/main/java/com/openisle/service/PostService.java b/backend/src/main/java/com/openisle/service/PostService.java
index 0af3758f6..9c4be50f1 100644
--- a/backend/src/main/java/com/openisle/service/PostService.java
+++ b/backend/src/main/java/com/openisle/service/PostService.java
@@ -1,10 +1,17 @@
 package com.openisle.service;
 
 import com.openisle.config.CachingConfig;
-import com.openisle.exception.NotFoundException;
 import com.openisle.exception.RateLimitException;
 import com.openisle.model.*;
 import com.openisle.repository.*;
+import java.time.Duration;
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+import java.util.*;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.ScheduledFuture;
+import java.util.stream.Collectors;
 import lombok.extern.slf4j.Slf4j;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.beans.factory.annotation.Value;
@@ -21,36 +28,6 @@ import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 import org.springframework.util.CollectionUtils;
 
-import java.time.Duration;
-import java.time.LocalDateTime;
-import java.time.ZoneId;
-import java.util.*;
-import com.openisle.exception.RateLimitException;
-import com.openisle.mapper.PostMapper;
-import com.openisle.model.*;
-import com.openisle.repository.CategoryRepository;
-import com.openisle.repository.CommentRepository;
-import com.openisle.repository.LotteryPostRepository;
-import com.openisle.repository.NotificationRepository;
-import com.openisle.repository.PointHistoryRepository;
-import com.openisle.repository.PollPostRepository;
-import com.openisle.repository.PollVoteRepository;
-import com.openisle.repository.PostRepository;
-import com.openisle.repository.PostSubscriptionRepository;
-import com.openisle.repository.ReactionRepository;
-import com.openisle.repository.TagRepository;
-import com.openisle.repository.UserRepository;
-import com.openisle.service.EmailSender;
-import java.time.Duration;
-import java.time.LocalDateTime;
-import java.time.ZoneId;
-import java.time.ZoneOffset;
-import java.util.*;
-import java.util.concurrent.ConcurrentHashMap;
-import java.util.concurrent.ConcurrentMap;
-import java.util.concurrent.ScheduledFuture;
-import java.util.stream.Collectors;
-
 @Slf4j
 @Service
 public class PostService {
@@ -121,6 +98,7 @@ public class PostService {
     this.tagRepository = tagRepository;
     this.lotteryPostRepository = lotteryPostRepository;
     this.pollPostRepository = pollPostRepository;
+    this.categoryProposalPostRepository = categoryProposalPostRepository;
     this.pollVoteRepository = pollVoteRepository;
     this.notificationService = notificationService;
     this.subscriptionService = subscriptionService;
@@ -165,18 +143,23 @@ public class PostService {
     for (PollPost pp : pollPostRepository.findByEndTimeBeforeAndResultAnnouncedFalse(now)) {
       applicationContext.getBean(PostService.class).finalizePoll(pp.getId());
     }
-    for (CategoryProposalPost cp : categoryProposalPostRepository
-            .findByEndTimeAfterAndProposalStatus(now, CategoryProposalStatus.PENDING)) {
-        if (cp.getEndTime() != null) {
-            ScheduledFuture<?> future = taskScheduler.schedule(
-                    () -> applicationContext.getBean(PostService.class).finalizeProposal(cp.getId()),
-                    java.util.Date.from(cp.getEndTime().atZone(ZoneId.systemDefault()).toInstant()));
-            scheduledFinalizations.put(cp.getId(), future);
-        }
+    for (CategoryProposalPost cp : categoryProposalPostRepository.findByEndTimeAfterAndProposalStatus(
+      now,
+      CategoryProposalStatus.PENDING
+    )) {
+      if (cp.getEndTime() != null) {
+        ScheduledFuture<?> future = taskScheduler.schedule(
+          () -> applicationContext.getBean(PostService.class).finalizeProposal(cp.getId()),
+          java.util.Date.from(cp.getEndTime().atZone(ZoneId.systemDefault()).toInstant())
+        );
+        scheduledFinalizations.put(cp.getId(), future);
+      }
     }
-    for (CategoryProposalPost cp : categoryProposalPostRepository
-            .findByEndTimeBeforeAndProposalStatus(now, CategoryProposalStatus.PENDING)) {
-        applicationContext.getBean(PostService.class).finalizeProposal(cp.getId());
+    for (CategoryProposalPost cp : categoryProposalPostRepository.findByEndTimeBeforeAndProposalStatus(
+      now,
+      CategoryProposalStatus.PENDING
+    )) {
+      applicationContext.getBean(PostService.class).finalizeProposal(cp.getId());
     }
   }
 
@@ -302,41 +285,41 @@ public class PostService {
       pp.setMultiple(multiple != null && multiple);
       post = pp;
     } else if (actualType == PostType.PROPOSAL) {
-        CategoryProposalPost cp = new CategoryProposalPost();
-        if (proposedName == null || proposedName.isBlank()) {
-            throw new IllegalArgumentException("Proposed name required");
+      CategoryProposalPost cp = new CategoryProposalPost();
+      if (proposedName == null || proposedName.isBlank()) {
+        throw new IllegalArgumentException("Proposed name required");
+      }
+      if (proposedSlug == null || proposedSlug.isBlank()) {
+        throw new IllegalArgumentException("Proposed slug required");
+      }
+      if (categoryProposalPostRepository.existsByProposedSlug(proposedSlug)) {
+        throw new IllegalArgumentException("Proposed slug already exists: " + proposedSlug);
+      }
+      cp.setProposedName(proposedName);
+      cp.setProposedSlug(proposedSlug);
+      cp.setDescription(proposalDescription);
+      if (approveThreshold != null) {
+        if (approveThreshold < 0 || approveThreshold > 100) {
+          throw new IllegalArgumentException("approveThreshold must be between 0 and 100");
         }
-        if (proposedSlug == null || proposedSlug.isBlank()) {
-            throw new IllegalArgumentException("Proposed slug required");
+        cp.setApproveThreshold(approveThreshold);
+      }
+      if (quorum != null) {
+        if (quorum < 0) {
+          throw new IllegalArgumentException("quorum must be >= 0");
         }
-        if (categoryProposalPostRepository.existsByProposedSlug(proposedSlug)) {
-            throw new IllegalArgumentException("Proposed slug already exists: " + proposedSlug);
-        }
-        cp.setProposedName(proposedName);
-        cp.setProposedSlug(proposedSlug);
-        cp.setDescription(proposalDescription);
-        if (approveThreshold != null) {
-            if (approveThreshold < 0 || approveThreshold > 100) {
-                throw new IllegalArgumentException("approveThreshold must be between 0 and 100");
-            }
-            cp.setApproveThreshold(approveThreshold);
-        }
-        if (quorum != null) {
-            if (quorum < 0) {
-                throw new IllegalArgumentException("quorum must be >= 0");
-            }
-            cp.setQuorum(quorum);
-        }
-        cp.setStartAt(startTime);
-        cp.setEndTime(endTime);
-        // default yes/no options if not provided
-        if (options == null || options.size() < 2) {
-            cp.setOptions(List.of("同意", "反对"));
-        } else {
-            cp.setOptions(options);
-        }
-        cp.setMultiple(false);
-        post = cp;
+        cp.setQuorum(quorum);
+      }
+      cp.setStartAt(startTime);
+      cp.setEndTime(endTime);
+      // default yes/no options if not provided
+      if (options == null || options.size() < 2) {
+        cp.setOptions(List.of("同意", "反对"));
+      } else {
+        cp.setOptions(options);
+      }
+      cp.setMultiple(false);
+      post = cp;
     } else {
       post = new Post();
     }
@@ -349,8 +332,8 @@ public class PostService {
     post.setStatus(publishMode == PublishMode.REVIEW ? PostStatus.PENDING : PostStatus.PUBLISHED);
     if (post instanceof LotteryPost) {
       post = lotteryPostRepository.save((LotteryPost) post);
-    }else if (post instanceof CategoryProposalPost categoryProposalPost) {
-        post = categoryProposalPostRepository.save(categoryProposalPost);
+    } else if (post instanceof CategoryProposalPost categoryProposalPost) {
+      post = categoryProposalPostRepository.save(categoryProposalPost);
     } else if (post instanceof PollPost) {
       post = pollPostRepository.save((PollPost) post);
     } else {
@@ -406,10 +389,11 @@ public class PostService {
       );
       scheduledFinalizations.put(lp.getId(), future);
     } else if (post instanceof CategoryProposalPost cp && cp.getEndTime() != null) {
-        ScheduledFuture<?> future = taskScheduler.schedule(
-                () -> applicationContext.getBean(PostService.class).finalizeProposal(cp.getId()),
-                java.util.Date.from(cp.getEndTime().atZone(ZoneId.systemDefault()).toInstant()));
-        scheduledFinalizations.put(cp.getId(), future);
+      ScheduledFuture<?> future = taskScheduler.schedule(
+        () -> applicationContext.getBean(PostService.class).finalizeProposal(cp.getId()),
+        java.util.Date.from(cp.getEndTime().atZone(ZoneId.systemDefault()).toInstant())
+      );
+      scheduledFinalizations.put(cp.getId(), future);
     } else if (post instanceof PollPost pp && pp.getEndTime() != null) {
       ScheduledFuture<?> future = taskScheduler.schedule(
         () -> applicationContext.getBean(PostService.class).finalizePoll(pp.getId()),
@@ -420,47 +404,72 @@ public class PostService {
     return post;
   }
 
-  @CacheEvict(
-    value = CachingConfig.POST_CACHE_NAME, allEntries = true
-  )
+  @CacheEvict(value = CachingConfig.POST_CACHE_NAME, allEntries = true)
   @Transactional
   public void finalizeProposal(Long postId) {
     scheduledFinalizations.remove(postId);
-    categoryProposalPostRepository.findById(postId).ifPresent(cp -> {
-    if (cp.getProposalStatus() != CategoryProposalStatus.PENDING) {
-      return;
-    }
-    int totalParticipants = cp.getParticipants() != null ? cp.getParticipants().size() : 0;
-    int approveVotes = 0;
-    if (cp.getVotes() != null) {
-      approveVotes = cp.getVotes().getOrDefault(0, 0);
-    }
-    boolean quorumMet = totalParticipants >= cp.getQuorum();
-    int approvePercent = totalParticipants > 0 ? (approveVotes * 100) / totalParticipants : 0;
-    boolean thresholdMet = approvePercent >= cp.getApproveThreshold();
-    if (quorumMet && thresholdMet) {
-      cp.setProposalStatus(CategoryProposalStatus.APPROVED);
-    } else {
-      cp.setProposalStatus(CategoryProposalStatus.REJECTED);
-      String reason;
-      if (!quorumMet && !thresholdMet) {
-        reason = "未达到法定人数且赞成率不足";
-      } else if (!quorumMet) {
-        reason = "未达到法定人数";
-      } else {
-        reason = "赞成率不足";
-      }
-        cp.setRejectReason(reason);
-    }
-    cp.setResultSnapshot("approveVotes=" + approveVotes + ", totalParticipants=" + totalParticipants + ", approvePercent=" + approvePercent);
-    categoryProposalPostRepository.save(cp);
-    if (cp.getAuthor() != null) {
-      notificationService.createNotification(cp.getAuthor(), NotificationType.POLL_RESULT_OWNER, cp, null, null, null, null, null);
-    }
-    for (User participant : cp.getParticipants()) {
-      notificationService.createNotification(participant, NotificationType.POLL_RESULT_PARTICIPANT, cp, null, null, null, null, null);
-    }
-    postChangeLogService.recordVoteResult(cp);
+    categoryProposalPostRepository
+      .findById(postId)
+      .ifPresent(cp -> {
+        if (cp.getProposalStatus() != CategoryProposalStatus.PENDING) {
+          return;
+        }
+        int totalParticipants = cp.getParticipants() != null ? cp.getParticipants().size() : 0;
+        int approveVotes = 0;
+        if (cp.getVotes() != null) {
+          approveVotes = cp.getVotes().getOrDefault(0, 0);
+        }
+        boolean quorumMet = totalParticipants >= cp.getQuorum();
+        int approvePercent = totalParticipants > 0 ? (approveVotes * 100) / totalParticipants : 0;
+        boolean thresholdMet = approvePercent >= cp.getApproveThreshold();
+        if (quorumMet && thresholdMet) {
+          cp.setProposalStatus(CategoryProposalStatus.APPROVED);
+        } else {
+          cp.setProposalStatus(CategoryProposalStatus.REJECTED);
+          String reason;
+          if (!quorumMet && !thresholdMet) {
+            reason = "未达到法定人数且赞成率不足";
+          } else if (!quorumMet) {
+            reason = "未达到法定人数";
+          } else {
+            reason = "赞成率不足";
+          }
+          cp.setRejectReason(reason);
+        }
+        cp.setResultSnapshot(
+          "approveVotes=" +
+            approveVotes +
+            ", totalParticipants=" +
+            totalParticipants +
+            ", approvePercent=" +
+            approvePercent
+        );
+        categoryProposalPostRepository.save(cp);
+        if (cp.getAuthor() != null) {
+          notificationService.createNotification(
+            cp.getAuthor(),
+            NotificationType.POLL_RESULT_OWNER,
+            cp,
+            null,
+            null,
+            null,
+            null,
+            null
+          );
+        }
+        for (User participant : cp.getParticipants()) {
+          notificationService.createNotification(
+            participant,
+            NotificationType.POLL_RESULT_PARTICIPANT,
+            cp,
+            null,
+            null,
+            null,
+            null,
+            null
+          );
+        }
+        postChangeLogService.recordVoteResult(cp);
       });
   }
 
diff --git a/backend/src/test/java/com/openisle/controller/PostControllerTest.java b/backend/src/test/java/com/openisle/controller/PostControllerTest.java
index 12180eecc..6a5cdfdc5 100644
--- a/backend/src/test/java/com/openisle/controller/PostControllerTest.java
+++ b/backend/src/test/java/com/openisle/controller/PostControllerTest.java
@@ -76,6 +76,15 @@ class PostControllerTest {
   @MockBean
   private MedalService medalService;
 
+  @MockBean
+  private CategoryService categoryService;
+
+  @MockBean
+  private TagService tagService;
+
+  @MockBean
+  private PointService pointService;
+
   @MockBean
   private com.openisle.repository.PollVoteRepository pollVoteRepository;
 
@@ -275,6 +284,7 @@ class PostControllerTest {
       any(),
       any(),
       any(),
+      any(),
       any()
     );
   }
diff --git a/backend/src/test/resources/application.properties b/backend/src/test/resources/application.properties
index b65fb13f2..a7bbe101e 100644
--- a/backend/src/test/resources/application.properties
+++ b/backend/src/test/resources/application.properties
@@ -46,3 +46,4 @@ app.avatar.base-url=${AVATAR_BASE_URL:https://api.dicebear.com/6.x}
 # Web push configuration
 app.webpush.public-key=${WEBPUSH_PUBLIC_KEY:}
 app.webpush.private-key=${WEBPUSH_PRIVATE_KEY:}
+app.snippet-length=${SNIPPET_LENGTH:200}