diff --git a/Models/ShellModels.cs b/Models/ShellModels.cs
index 90dac1c..213000c 100644
--- a/Models/ShellModels.cs
+++ b/Models/ShellModels.cs
@@ -194,7 +194,7 @@ namespace RevitHttpControl.Models
         /// <summary>
         /// 处理耗时（秒）
         /// </summary>
-        public double ProcessingTimeSeconds { get; set; }
+        public int ProcessingTimeSeconds { get; set; }
     }
 
     /// <summary>
diff --git a/Services/ShellOptimizer.cs b/Services/ShellOptimizer.cs
index f8cc17b..f01be99 100644
--- a/Services/ShellOptimizer.cs
+++ b/Services/ShellOptimizer.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Collections.Generic;
 using System.Diagnostics;
 using System.IO;
@@ -38,7 +38,7 @@ namespace RevitHttpControl.Services
                 result.OriginalSize = FormatFileSize(originalSize);
 
                 // 2. 分析模型获取删除列表
-                var analysis = _analyzer.AnalyzeModel(doc, mode);
+                _analyzer.AnalyzeModel(doc, mode);
                 var elementsToDelete = GetElementsToDelete(doc, mode);
 
                 // 3. 创建备份（如果需要）
@@ -49,7 +49,8 @@ namespace RevitHttpControl.Services
 
                 // 4. 执行删除操作
                 var deletedCount = DeleteElements(doc, elementsToDelete, mode);
-                result.RemovedCount = deletedCount;
+                var purgedCount = PurgeUnusedFamilyData(doc);
+                result.RemovedCount = deletedCount + purgedCount;
 
                 // 5. 保存文档并计算优化后大小
                 SaveDocument(doc);
@@ -68,14 +69,14 @@ namespace RevitHttpControl.Services
                 }
 
                 stopwatch.Stop();
-                result.ProcessingTimeSeconds = stopwatch.Elapsed.TotalSeconds;
+                result.ProcessingTimeSeconds = (int)Math.Round(stopwatch.Elapsed.TotalSeconds, MidpointRounding.AwayFromZero);
 
                 return result;
             }
             catch (Exception ex)
             {
                 stopwatch.Stop();
-                result.ProcessingTimeSeconds = stopwatch.Elapsed.TotalSeconds;
+                result.ProcessingTimeSeconds = (int)Math.Round(stopwatch.Elapsed.TotalSeconds, MidpointRounding.AwayFromZero);
                 
                 // 如果有备份且操作失败，可以考虑恢复备份
                 throw new InvalidOperationException($"薄壳优化执行失败: {ex.Message}", ex);
@@ -111,9 +112,10 @@ namespace RevitHttpControl.Services
                     result.BackupPath = CreateBackup(doc);
                 }
 
-                // 自定义删除沿用标准安全检查逻辑（非 EnvelopeOnly）
+                // Reuse Standard safety checks for custom category deletion.
                 var deletedCount = DeleteElements(doc, elementsToDelete, ShellOptimizeMode.Standard);
-                result.RemovedCount = deletedCount;
+                var purgedCount = PurgeUnusedFamilyData(doc);
+                result.RemovedCount = deletedCount + purgedCount;
 
                 SaveDocument(doc);
                 var optimizedSize = GetDocumentFileSize(doc);
@@ -130,14 +132,14 @@ namespace RevitHttpControl.Services
                 }
 
                 stopwatch.Stop();
-                result.ProcessingTimeSeconds = stopwatch.Elapsed.TotalSeconds;
+                result.ProcessingTimeSeconds = (int)Math.Round(stopwatch.Elapsed.TotalSeconds, MidpointRounding.AwayFromZero);
 
                 return result;
             }
             catch (Exception ex)
             {
                 stopwatch.Stop();
-                result.ProcessingTimeSeconds = stopwatch.Elapsed.TotalSeconds;
+                result.ProcessingTimeSeconds = (int)Math.Round(stopwatch.Elapsed.TotalSeconds, MidpointRounding.AwayFromZero);
                 throw new InvalidOperationException($"自定义类别删除执行失败: {ex.Message}", ex);
             }
         }
@@ -219,6 +221,7 @@ namespace RevitHttpControl.Services
             using (var transaction = new Transaction(doc, "薄壳优化删除构件"))
             {
                 transaction.Start();
+                ApplyWarningSuppression(transaction);
                 
                 try
                 {
@@ -404,6 +407,12 @@ namespace RevitHttpControl.Services
                     return;
                 }
 
+                // Prefer compact save for normal local documents to reclaim free space.
+                if (TryCompactSaveInPlace(doc))
+                {
+                    return;
+                }
+
                 try
                 {
                     doc.Save();
@@ -421,6 +430,38 @@ namespace RevitHttpControl.Services
             }
         }
 
+        private bool TryCompactSaveInPlace(Document doc)
+        {
+            if (doc == null)
+                return false;
+
+            if (doc.IsWorkshared)
+                return false;
+
+            var originalPath = doc.PathName;
+            if (string.IsNullOrWhiteSpace(originalPath))
+                return false;
+
+            if (!File.Exists(originalPath))
+                return false;
+
+            try
+            {
+                var options = new SaveAsOptions
+                {
+                    OverwriteExistingFile = true,
+                    Compact = true
+                };
+
+                doc.SaveAs(originalPath, options);
+                return true;
+            }
+            catch
+            {
+                return false;
+            }
+        }
+
         private bool IsReadOnlySaveError(Exception ex)
         {
             if (ex == null) return false;
@@ -453,6 +494,118 @@ namespace RevitHttpControl.Services
             doc.SaveAs(outputPath, saveAsOptions);
         }
 
+        /// <summary>
+        /// Remove unused family symbols and empty families after instance deletion.
+        /// </summary>
+        private int PurgeUnusedFamilyData(Document doc)
+        {
+            if (doc == null)
+                return 0;
+
+            var usedSymbolIds = new HashSet<int>();
+            var instances = new FilteredElementCollector(doc)
+                .OfClass(typeof(FamilyInstance))
+                .WhereElementIsNotElementType()
+                .Cast<FamilyInstance>();
+
+            foreach (var instance in instances)
+            {
+                var symbolId = instance?.Symbol?.Id?.IntegerValue;
+                if (symbolId.HasValue)
+                {
+                    usedSymbolIds.Add(symbolId.Value);
+                }
+            }
+
+            var unusedSymbolIds = new FilteredElementCollector(doc)
+                .OfClass(typeof(FamilySymbol))
+                .Cast<FamilySymbol>()
+                .Where(symbol => symbol != null && !usedSymbolIds.Contains(symbol.Id.IntegerValue))
+                .Select(symbol => symbol.Id)
+                .ToList();
+
+            var removedSymbolCount = DeleteElementIdsInBatches(doc, unusedSymbolIds, "清理未使用族类型");
+
+            var emptyFamilyIds = new FilteredElementCollector(doc)
+                .OfClass(typeof(Family))
+                .Cast<Family>()
+                .Where(family => family != null && !family.GetFamilySymbolIds().Any())
+                .Select(family => family.Id)
+                .ToList();
+
+            var removedFamilyCount = DeleteElementIdsInBatches(doc, emptyFamilyIds, "清理空族定义");
+            return removedSymbolCount + removedFamilyCount;
+        }
+
+        private int DeleteElementIdsInBatches(Document doc, List<ElementId> elementIds, string transactionName)
+        {
+            if (doc == null || elementIds == null || elementIds.Count == 0)
+                return 0;
+
+            const int batchSize = 100;
+            int totalRemoved = 0;
+
+            for (int i = 0; i < elementIds.Count; i += batchSize)
+            {
+                var batchIds = elementIds.Skip(i).Take(batchSize).ToList();
+                if (batchIds.Count == 0)
+                    continue;
+
+                using (var transaction = new Transaction(doc, transactionName))
+                {
+                    transaction.Start();
+                    ApplyWarningSuppression(transaction);
+
+                    try
+                    {
+                        var deletedIds = doc.Delete(batchIds);
+                        transaction.Commit();
+                        totalRemoved += deletedIds.Count;
+                    }
+                    catch
+                    {
+                        transaction.RollBack();
+                    }
+                }
+            }
+
+            return totalRemoved;
+        }
+
+        private void ApplyWarningSuppression(Transaction transaction)
+        {
+            if (transaction == null)
+                return;
+
+            var options = transaction.GetFailureHandlingOptions();
+            options.SetFailuresPreprocessor(new WarningFailurePreprocessor());
+            options.SetClearAfterRollback(true);
+            transaction.SetFailureHandlingOptions(options);
+        }
+
+        private class WarningFailurePreprocessor : IFailuresPreprocessor
+        {
+            public FailureProcessingResult PreprocessFailures(FailuresAccessor failuresAccessor)
+            {
+                if (failuresAccessor == null)
+                    return FailureProcessingResult.Continue;
+
+                var failures = failuresAccessor.GetFailureMessages();
+                if (failures == null || failures.Count == 0)
+                    return FailureProcessingResult.Continue;
+
+                foreach (var failure in failures)
+                {
+                    if (failure != null && failure.GetSeverity() == FailureSeverity.Warning)
+                    {
+                        failuresAccessor.DeleteWarning(failure);
+                    }
+                }
+
+                return FailureProcessingResult.Continue;
+            }
+        }
+
         /// <summary>
         /// 获取文档文件大小
         /// </summary>
diff --git a/app.config b/app.config
index 1729791..1ec619e 100644
--- a/app.config
+++ b/app.config
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="utf-8"?>
 <configuration>
   <appSettings>
-    <add key="PluginCallbackBaseUrl" value="" />
-    <add key="PluginCallbackToken" value="" />
+    <add key="PluginCallbackBaseUrl" value="http://localhost:8000" />
+    <add key="PluginCallbackToken" value="revit-callback-token" />
     <add key="PluginSoftwareId" value="revit" />
   </appSettings>
   <runtime>