gui: remove reaction UI artifacts

Reactions were removed from the core runtime. Remove the dead QML code:
- 3x setReactions/getReactions dbus calls
- blockReaction property on delegate loader
- Reaction badge label and reaction buttons row

gui/main-kf5.qml

@@ -909,7 +909,7 @@ ApplicationWindow {
                     if (chat) {
                     paneModel.rawText = chat.text
                     chatOffset = chat.offset
-                    paneModel.setReactions(dbus.getReactions(sessionId))
+
                     }
                     var cfg = dbus.getConfig(sessionId)
                     if (cfg && cfg.cwd) paneCwd = cfg.cwd
@@ -940,13 +940,11 @@ ApplicationWindow {
                     if (offset === paneRoot.chatOffset) {
                         paneRoot.paneModel.rawText = paneRoot.paneModel.rawText + text
                         paneRoot.chatOffset += text.length
-                        paneRoot.paneModel.setReactions(dbus.getReactions(paneRoot.sessionId))
                     } else {
                         var chat = dbus.getChat(paneRoot.sessionId, 0)
                         if (chat) {
                             paneRoot.paneModel.rawText = chat.text
                             paneRoot.chatOffset = chat.offset
-                            paneRoot.paneModel.setReactions(dbus.getReactions(paneRoot.sessionId))
                         }
                     }
                 }
@@ -1151,7 +1149,6 @@ ApplicationWindow {
                                 delegate: Loader {
                                     width: paneColumn.width
                                     property var block: model
-                                    property string blockReaction: model.reaction || ""
                                     sourceComponent: {
                                         switch (blockType) {
                                         case "user":      return userDelegate
@@ -1539,47 +1536,7 @@ ApplicationWindow {
                     Behavior on opacity { NumberAnimation { duration: 150 } }
                 }
 
-                // Reaction badge (pinned when reacted)
-                Label {
-                    anchors.bottom: parent.bottom
-                    anchors.right: parent.right
-                    anchors.margins: 4
-                    z: 10
-                    text: blockReaction
-                    font.pixelSize: 18
-                    visible: blockReaction !== ""
-                }
 
-                // Reaction buttons (hover only, hidden when already reacted)
-                Row {
-                    anchors.bottom: parent.bottom
-                    anchors.right: parent.right
-                    anchors.rightMargin: blockReaction !== "" ? 36 : 4
-                    anchors.margins: 4
-                    z: 10
-                    spacing: 2
-                    opacity: (assistantHover.hovered && blockReaction === "") ? 0.9 : 0
-                    Behavior on opacity { NumberAnimation { duration: 150 } }
-
-                    Repeater {
-                        model: [
-                            { emoji: "\uD83D\uDC4D", tip: "Good" },
-                            { emoji: "\uD83D\uDC4E", tip: "Bad" },
-                            { emoji: "\uD83D\uDE80", tip: "Excellent" },
-                            { emoji: "\uD83D\uDCA9", tip: "Very bad" },
-                            { emoji: "\uD83E\uDD14", tip: "Confused" }
-                        ]
-                        ToolButton {
-                            text: modelData.emoji
-                            font.pixelSize: 14
-                            implicitWidth: 28
-                            implicitHeight: 28
-                            onClicked: { dbus.reactTo(paneRoot.sessionId, block.responseId, modelData.emoji); paneRoot.paneModel.setReactions(dbus.getReactions(paneRoot.sessionId)) }
-                            ToolTip.text: modelData.tip
-                            ToolTip.visible: hovered
-                        }
-                    }
-                }
 
                 ColumnLayout {
                     id: assistantContent