From ac62057035e2286f6c6409e40e12284e4829103b Mon Sep 17 00:00:00 2001
From: ModerRAS <adqewsx@gmail.com>
Date: Thu, 23 Apr 2026 21:19:47 +0800
Subject: [PATCH] fix: collapse intermediate output to summary

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
---
 .../Helper/MessageFormatHelperTests.cs        | 15 +++++-------
 .../Helper/MessageFormatHelper.cs             | 24 +++++--------------
 2 files changed, 12 insertions(+), 27 deletions(-)

diff --git a/TelegramSearchBot.Test/Helper/MessageFormatHelperTests.cs b/TelegramSearchBot.Test/Helper/MessageFormatHelperTests.cs
index a83d20d0..0cdd03e0 100644
--- a/TelegramSearchBot.Test/Helper/MessageFormatHelperTests.cs
+++ b/TelegramSearchBot.Test/Helper/MessageFormatHelperTests.cs
@@ -33,30 +33,27 @@ public void CollapseLlmIntermediateIterations_WithFinalIteration_CollapsesPrefix
 
             var result = MessageFormatHelper.CollapseLlmIntermediateIterations(input);
 
-            Assert.Contains(":::tg-expandable-blockquote", result);
-            Assert.Contains("第一轮分析", result);
+            Assert.Contains("已折叠前面的中间过程和 1 次工具调用", result);
             Assert.Contains("🔧 `search_messages` [query: telegram collapse]", result);
+            Assert.DoesNotContain("第一轮分析", result);
             Assert.EndsWith("最终回答：可以把中间过程折叠起来。", result);
         }
 
         [Fact]
-        public void ConvertMarkdownToTelegramHtml_WithCollapsedIterations_EmitsSpoiler() {
+        public void ConvertMarkdownToTelegramHtml_WithCollapsedIterations_EmitsCompactSummary() {
             var markdown = """
-:::tg-expandable-blockquote
-第一轮分析
-
-🔧 `search_messages` [query: telegram collapse]
-:::
+💭 已折叠前面的中间过程和 1 次工具调用（最近一次：🔧 `search_messages` [query: telegram collapse]）。
 
 最终回答：可以把中间过程折叠起来。
 """;
 
             var html = MessageFormatHelper.ConvertMarkdownToTelegramHtml(markdown);
 
-            Assert.Contains("<tg-spoiler>", html);
+            Assert.Contains("已折叠前面的中间过程和 1 次工具调用", html);
             Assert.Contains("<code>search_messages</code>", html);
             Assert.Contains("最终回答：可以把中间过程折叠起来。", html);
             Assert.DoesNotContain("<blockquote", html);
+            Assert.DoesNotContain("<tg-spoiler>", html);
         }
 
         [Fact]
diff --git a/TelegramSearchBot/Helper/MessageFormatHelper.cs b/TelegramSearchBot/Helper/MessageFormatHelper.cs
index ff047a27..6c47be39 100644
--- a/TelegramSearchBot/Helper/MessageFormatHelper.cs
+++ b/TelegramSearchBot/Helper/MessageFormatHelper.cs
@@ -61,18 +61,14 @@ private static void ProcessHtmlNode(HtmlNode node, StringBuilder builder) {
                         case "h1": case "h2": case "h3": case "h4": case "h5": case "h6": builder.Append("<b>"); ProcessChildren(node, builder); builder.Append("</b>\n"); break;
                         case "ul": case "ol": ProcessList(node, builder, tagName == "ol" ? 1 : 0); builder.Append("\n"); break;
                         case "blockquote":
-                            if (node.Attributes["expandable"] != null) {
-                                AppendSpoilerBlock(node, builder);
-                            } else {
-                                AppendQuotedBlock(node, builder);
-                            }
+                            AppendQuotedBlock(node, builder);
                             break;
                         case "span":
                         case "div":
                         case "font":
                         case "img":
                             if (tagName == "div" && HasCssClass(node, ExpandableBlockquoteContainerClass)) {
-                                AppendSpoilerBlock(node, builder);
+                                AppendQuotedBlock(node, builder);
                                 break;
                             }
                             if (tagName == "img") {
@@ -104,12 +100,6 @@ private static bool HasCssClass(HtmlNode node, string cssClass) {
                 .Any(x => string.Equals(x, cssClass, StringComparison.Ordinal));
         }
 
-        private static void AppendSpoilerBlock(HtmlNode node, StringBuilder builder) {
-            builder.Append("<tg-spoiler>");
-            ProcessChildren(node, builder);
-            builder.Append("</tg-spoiler>");
-        }
-
         private static void AppendQuotedBlock(HtmlNode node, StringBuilder builder) {
             var quotedContent = new StringBuilder();
             ProcessChildren(node, quotedContent);
@@ -293,13 +283,11 @@ public static string CollapseLlmIntermediateIterations(string markdown) {
                 return markdown;
             }
 
-            return $"""
-:::{ExpandableBlockquoteContainerClass}
-{collapsedPrefix}
-:::
+            var lastToolCall = lastMatch.Value.Trim();
+            var toolCallCountText = matches.Count == 1 ? "1 次工具调用" : $"{matches.Count} 次工具调用";
+            var collapsedSummary = $"💭 已折叠前面的中间过程和 {toolCallCountText}（最近一次：{lastToolCall}）。";
 
-{visibleSuffix}
-""";
+            return $"{collapsedSummary}\n\n{visibleSuffix}";
         }
 
         public static string EscapeMarkdownV2(string text) {