feat(mcp-server): make Recent Activity rows collapsible by default

CHANGELOG.md

@@ -2,6 +2,22 @@
 
 ## [Unreleased]
 
+### Added
+- **Funplay > MCP Settings > Recent Activity** now includes a per-project **Expand all entries by default** preference. It is enabled by default for new and previously unconfigured projects, persists across Editor reloads (including an explicit off choice), and updates the open panel immediately without restarting MCP. Manually expanded or collapsed rows retain their state until the panel is reopened.
+
+### Changed
+- The MCP Server window's Recent Activity panel supports collapsing entries to one-line summaries by clicking their headers, and reopening them from either the header or summary. With **Expand all entries by default** disabled, history is collapsed and only the latest result expands automatically; manually expanded or collapsed rows keep their state as new entries arrive. Summaries resize with the panel's available width in both directions, and hovering either the header or summary consistently shows the same formatted, multi-line detail text.
+
+- Collapsed summaries use the human-readable formatted result instead of raw JSON and retain text beyond the compact resource summary's 200-character limit, while keeping the existing 4,000-character display bound. Plain-text results use that same display budget.
+- Detail controls and screenshot textures are created only when a row expands and released when it collapses, is cleared, or is evicted. The panel mirrors the activity log's bounded capacity, and queued callbacks cannot resurrect cleared rows or duplicate rows after a rebuild.
+
+### Pull requests and issues
+- [PR #57](https://github.com/FunplayAI/funplay-unity-mcp/pull/57): collapsible Recent Activity, with a persistent expand-all preference, readable summaries, lazy detail loading, resource cleanup, and Editor UI regression tests.
+- No GitHub issues were closed by these changes.
+
+### Contributors
+- Thanks [@dehuaichendragonplus](https://github.com/dehuaichendragonplus) for PR #57.
+
 ## [0.6.6] - 2026-09-07
 
 ### Added

Editor/MCP/Server/FunplayMCPWindow.cs

@@ -99,7 +99,7 @@ private void BuildUI()
                     BuildUI)
                 .AddTo(mainContainer);
 
-            _activityPanel = new FunplayMCPRecentActivityPanel(_mcpServer);
+            _activityPanel = new FunplayMCPRecentActivityPanel(_mcpServer, _settingsController);
             _activityPanel.AddTo(mainContainer);
         }
 

Editor/MCP/Server/FunplayPluginSettingsWindow.cs

@@ -19,6 +19,7 @@ namespace Funplay.Editor.MCP.Server
     internal class FunplayPluginSettingsWindow : EditorWindow
     {
         private ISettingsController _settingsController;
+        private Toggle _recentActivityExpandedToggle;
         private Toggle _debugLoggingToggle;
         private Label _debugStatusLabel;
 
@@ -32,6 +33,8 @@ public static void ShowWindow()
 
         public void CreateGUI()
         {
+            if (_settingsController != null)
+                _settingsController.OnSettingsChanged -= RefreshStatus;
             _settingsController = RootScopeServices.Services?.GetService(typeof(ISettingsController))
                 as ISettingsController;
 
@@ -68,17 +71,41 @@ private void BuildUI()
             title.style.marginBottom = 4;
             rootVisualElement.Add(title);
 
-            var hint = new Label("Project-level settings for the Funplay Unity MCP plugin. Safety checks and debug logging are stored per project.");
+            var hint = new Label("Project-level settings for the Funplay Unity MCP plugin. Preferences are saved per project.");
             hint.style.fontSize = 11;
             hint.style.color = new Color(0.65f, 0.65f, 0.65f);
             hint.style.whiteSpace = WhiteSpace.Normal;
             hint.style.marginBottom = 10;
             rootVisualElement.Add(hint);
 
+            var content = new ScrollView(ScrollViewMode.Vertical) { name = "mcp-settings-scroll" };
+            content.style.flexGrow = 1;
+            content.style.minHeight = 0;
+            rootVisualElement.Add(content);
+
             var safetySection = CreateSection();
             safetySection.style.marginBottom = 8;
             FunplayMCPSafetyPanel.AddTo(safetySection, _settingsController);
-            rootVisualElement.Add(safetySection);
+            content.Add(safetySection);
+
+            var activitySection = CreateSection();
+            activitySection.style.marginBottom = 8;
+            activitySection.Add(CreateSectionHeader("Recent Activity"));
+            _recentActivityExpandedToggle = new Toggle("Expand all entries by default")
+            {
+                name = "recent-activity-expanded-by-default"
+            };
+            _recentActivityExpandedToggle.style.marginBottom = 5;
+            _recentActivityExpandedToggle.labelElement.style.whiteSpace = WhiteSpace.Normal;
+            _recentActivityExpandedToggle.labelElement.style.flexShrink = 1;
+            _recentActivityExpandedToggle.SetValueWithoutNotify(_settingsController.MCPRecentActivityExpandedByDefault);
+            _recentActivityExpandedToggle.RegisterValueChangedCallback(evt =>
+                _settingsController.MCPRecentActivityExpandedByDefault = evt.newValue);
+            activitySection.Add(_recentActivityExpandedToggle);
+            activitySection.Add(CreateHint(
+                "On: expand all entries. Off: collapse history and expand only the latest entry. " +
+                "Applies immediately; manually expanded or collapsed entries keep your choice until the panel is reopened."));
+            content.Add(activitySection);
 
             var debugSection = CreateSection();
             debugSection.Add(CreateSectionHeader("Debug"));
@@ -96,7 +123,7 @@ private void BuildUI()
             _debugStatusLabel = CreateHint(string.Empty);
             debugSection.Add(_debugStatusLabel);
 
-            rootVisualElement.Add(debugSection);
+            content.Add(debugSection);
             RefreshStatus();
         }
 
@@ -105,6 +132,8 @@ private void RefreshStatus()
             if (_settingsController == null)
                 return;
 
+            _recentActivityExpandedToggle?.SetValueWithoutNotify(_settingsController.MCPRecentActivityExpandedByDefault);
+
             var enabled = _settingsController.PluginDebugLoggingEnabled;
             if (_debugLoggingToggle != null)
                 _debugLoggingToggle.SetValueWithoutNotify(enabled);
@@ -123,6 +152,7 @@ private void RefreshStatus()
         private static VisualElement CreateSection()
         {
             var section = new VisualElement();
+            section.style.flexShrink = 0;
             section.style.backgroundColor = new Color(0.14f, 0.14f, 0.14f);
             section.style.borderTopLeftRadius = 4;
             section.style.borderTopRightRadius = 4;

Editor/MCP/Server/MCPInteractionLog.cs

@@ -43,6 +43,7 @@ internal class MCPInteractionLog
         private readonly object _lock = new object();
 
         public event Action<MCPLogEntry> OnEntryAdded;
+        internal int Capacity => _buffer.Length;
 
         public MCPInteractionLog(int capacity = 200)
         {
@@ -57,7 +58,11 @@ public void Add(string toolName, MCPToolCallStatus status, string resultSummary)
             var compactSummary = imageDataUri != null
                 ? "Screenshot captured successfully."
                 : CreateCompactSummary(resultSummary);
-            var displayResult = compactSummary;
+            // Keep the compact resource/log summary bounded at 200 characters, but do not
+            // irreversibly truncate the panel's plain-text display at that smaller limit.
+            var displayResult = imageDataUri != null
+                ? compactSummary
+                : TruncateDisplayResult(resultSummary ?? "");
             var isJsonResult = false;
 
             if (imageDataUri == null && TryFormatJsonForDisplay(resultSummary, out var formattedJson))

Editor/Settings/ISettingsController.cs

@@ -30,6 +30,7 @@ internal interface ISettingsController
         bool ExecuteCodeStrictFilesystemSafetyEnabled { get; set; }
         bool ExecuteCodeProjectNamespaceInjectionEnabled { get; set; }
         bool PluginDebugLoggingEnabled { get; set; }
+        bool MCPRecentActivityExpandedByDefault { get; set; }
         bool MCPBrokerModeEnabled { get; set; }
         string MCPBrokerMonoPath { get; set; }
 

Editor/Settings/SettingsController.cs

@@ -23,6 +23,7 @@ internal class SettingsController : ISettingsController
         private const bool DefaultExecuteCodeStrictFilesystemSafetyEnabled = true;
         private const bool DefaultExecuteCodeProjectNamespaceInjectionEnabled = false;
         private const bool DefaultPluginDebugLoggingEnabled = false;
+        private const bool DefaultMCPRecentActivityExpandedByDefault = true;
         private const bool DefaultMCPBrokerModeEnabled = false;
 
         private readonly string _settingsPath;
@@ -254,6 +255,23 @@ public bool PluginDebugLoggingEnabled
             }
         }
 
+        public bool MCPRecentActivityExpandedByDefault
+        {
+            get
+            {
+                lock (_lock)
+                    return _settings.mcpRecentActivityExpandedByDefault;
+            }
+            set
+            {
+                UpdateSettings(data =>
+                {
+                    data.mcpRecentActivityExpandedByDefault = value;
+                    data.mcpRecentActivityExpansionConfigured = true;
+                });
+            }
+        }
+
         public bool MCPBrokerModeEnabled
         {
             get
@@ -413,6 +431,8 @@ private static SettingsData CreateDefaultSettings()
                 executeCodeProjectNamespaceInjectionConfigured = true,
                 pluginDebugLoggingEnabled = DefaultPluginDebugLoggingEnabled,
                 pluginDebugLoggingConfigured = true,
+                mcpRecentActivityExpandedByDefault = DefaultMCPRecentActivityExpandedByDefault,
+                mcpRecentActivityExpansionConfigured = true,
                 mcpBrokerModeEnabled = DefaultMCPBrokerModeEnabled,
                 mcpBrokerMonoPath = string.Empty
             };
@@ -468,6 +488,11 @@ private static void NormalizeInPlace(SettingsData settings)
                 settings.pluginDebugLoggingEnabled = DefaultPluginDebugLoggingEnabled;
                 settings.pluginDebugLoggingConfigured = true;
             }
+            if (!settings.mcpRecentActivityExpansionConfigured)
+            {
+                settings.mcpRecentActivityExpandedByDefault = DefaultMCPRecentActivityExpandedByDefault;
+                settings.mcpRecentActivityExpansionConfigured = true;
+            }
         }
 
         private static string NormalizeToolExportProfile(string value)
@@ -519,6 +544,8 @@ private class SettingsData
             public bool executeCodeProjectNamespaceInjectionConfigured = false;
             public bool pluginDebugLoggingEnabled = DefaultPluginDebugLoggingEnabled;
             public bool pluginDebugLoggingConfigured = false;
+            public bool mcpRecentActivityExpandedByDefault = DefaultMCPRecentActivityExpandedByDefault;
+            public bool mcpRecentActivityExpansionConfigured = false;
             public bool mcpBrokerModeEnabled = DefaultMCPBrokerModeEnabled;
             public string mcpBrokerMonoPath = string.Empty;
             public List<string> mcpLastClientConfigKeys;