pin reaction badge on assistant blocks, hide reaction buttons after reacting

gui/ChatPane.qml

@@ -683,14 +683,26 @@ Item {
                     Behavior on opacity { NumberAnimation { duration: 150 } }
                 }
 
-                // Reaction buttons
-                Row {
+                // Reaction badge (pinned when reacted)
+                Label {
                     anchors.bottom: parent.bottom
                     anchors.right: parent.right
                     anchors.margins: 4
                     z: 10
+                    text: block.reaction || ""
+                    font.pixelSize: 18
+                    visible: block.reaction !== ""
+                }
+
+                // Reaction buttons (hover only, hidden when already reacted)
+                Row {
+                    anchors.bottom: parent.bottom
+                    anchors.right: parent.right
+                    anchors.rightMargin: block.reaction !== "" ? 36 : 4
+                    anchors.margins: 4
+                    z: 10
                     spacing: 2
-                    opacity: assistantHover.hovered ? 0.9 : 0
+                    opacity: (assistantHover.hovered && block.reaction === "") ? 0.9 : 0
                     Behavior on opacity { NumberAnimation { duration: 150 } }
 
                     Repeater {

gui/chatblockmodel.cpp

@@ -66,6 +66,8 @@ QVariant ChatBlockModel::data(const QModelIndex &index, int role) const
         return block.content;
     case ResponseIdRole:
         return block.responseId;
+    case ReactionRole:
+        return block.reaction;
     case SubBlocksRole:
         if (block.cachedContent != block.content) {
             block.cachedSubBlocks = parseSubBlocks(block.content);
@@ -105,6 +107,7 @@ QHash<int, QByteArray> ChatBlockModel::roleNames() const
         {SubBlocksRole, "subBlocks"},
         {FormattedContentRole, "formattedContent"},
         {ResponseIdRole, "responseId"},
+        {ReactionRole, "reaction"},
     };
 }
 
@@ -236,6 +239,8 @@ QList<ChatBlock> ChatBlockModel::parseBlocks(const QString &text) const
     static const QRegularExpression headerRe(
         R"(^\[(user|assistant|reasoning|call|tool|error|info)(?::([^\]]*))?\](.*)$)",
         QRegularExpression::MultilineOption);
+    static const QRegularExpression reactionRe(
+        R"(^\[reaction to assistant response ([^ ]+): ([^ ]+) \(([^)]+)\)\])");
 
     auto it = headerRe.globalMatch(text);
     QList<QPair<int, QRegularExpressionMatch>> headers;
@@ -253,6 +258,15 @@ QList<ChatBlock> ChatBlockModel::parseBlocks(const QString &text) const
         return blocks;
     }
 
+    // First pass: collect reaction-to-response mappings.
+    QHash<QString, QString> reactionMap;
+    for (const auto &[pos, match] : headers) {
+        auto rm = reactionRe.match(match.captured(0));
+        if (rm.hasMatch()) {
+            reactionMap[rm.captured(1)] = rm.captured(3);
+        }
+    }
+
     for (int i = 0; i < headers.size(); ++i) {
         const auto &[pos, match] = headers[i];
         QString typeStr = match.captured(1);
@@ -284,10 +298,14 @@ QList<ChatBlock> ChatBlockModel::parseBlocks(const QString &text) const
         else if (typeStr == "error")     b.type = ChatBlock::Error;
         else if (typeStr == "info")      b.type = ChatBlock::Info;
 
-        if (b.type == ChatBlock::Assistant)
+        if (b.type == ChatBlock::Assistant) {
             b.responseId = name;
-        else
+            auto it = reactionMap.constFind(name);
+            if (it != reactionMap.constEnd())
+                b.reaction = it.value();
+        } else {
             b.name = name;
+        }
         b.content = content;
         blocks.append(b);
     }

gui/chatblockmodel.h

@@ -20,6 +20,7 @@ struct ChatBlock {
     Type type;
     QString name;       // tool/call name, empty for others
     QString responseId; // stable assistant response ID
+    QString reaction;   // emoji reaction text (empty if not reacted)
     QString content;    // raw text content
     mutable QVariantList cachedSubBlocks; // cached parseSubBlocks result
     mutable QString cachedContent;        // content when subBlocks were cached
@@ -53,6 +54,7 @@ public:
         SubBlocksRole,  // QVariantList of sub-block maps
         FormattedContentRole, // pre-formatted HTML for call/tool expanded view
         ResponseIdRole,
+        ReactionRole,
     };
 
     explicit ChatBlockModel(QObject *parent = nullptr);

gui/main-kf5.qml

@@ -1508,14 +1508,26 @@ ApplicationWindow {
                     Behavior on opacity { NumberAnimation { duration: 150 } }
                 }
 
-                // Reaction buttons
-                Row {
+                // Reaction badge (pinned when reacted)
+                Label {
                     anchors.bottom: parent.bottom
                     anchors.right: parent.right
                     anchors.margins: 4
                     z: 10
+                    text: block.reaction || ""
+                    font.pixelSize: 18
+                    visible: block.reaction !== ""
+                }
+
+                // Reaction buttons (hover only, hidden when already reacted)
+                Row {
+                    anchors.bottom: parent.bottom
+                    anchors.right: parent.right
+                    anchors.rightMargin: block.reaction !== "" ? 36 : 4
+                    anchors.margins: 4
+                    z: 10
                     spacing: 2
-                    opacity: assistantHover.hovered ? 0.9 : 0
+                    opacity: (assistantHover.hovered && block.reaction === "") ? 0.9 : 0
                     Behavior on opacity { NumberAnimation { duration: 150 } }
 
                     Repeater {