gui: add Clear button next to Compact

- Clear button sends /clear command
- /clear now resets history, chat log, and block counter
- Completely fresh start without creating a new session
- Button disabled while agent is running

cmd/olliesrv/internal/agent/agent.go

@@ -305,12 +305,19 @@ func (ag *Agent) Compact(ctx context.Context) error {
 	return nil
 }
 
-// Clear resets the agent history. Returns an error if the agent is running.
+// Clear resets the agent history and chat log. Returns an error if the agent is running.
 func (ag *Agent) Clear() error {
 	if ag.IsRunning() {
 		return fmt.Errorf("cannot clear while agent is running")
 	}
 	ag.history = nil
+	ag.chatMu.Lock()
+	ag.chatLog = nil
+	ag.chatStart = 0
+	ag.chatVers++
+	ag.blockCounter = 0
+	ag.chatMu.Unlock()
+	ag.chatCond.Broadcast()
 	return nil
 }
 

kde/gui/ChatPane.qml

@@ -381,6 +381,19 @@ Item {
                     ToolTip.text: "Compact context window"
                 }
 
+                ToolButton {
+                    text: "🗑 Clear"
+                    font.pixelSize: theme.fontSize > 0 ? theme.fontSize * 0.9 : 11
+                    implicitHeight: 28
+                    enabled: ollie.activeState === "idle"
+                    onClicked: {
+                        ollie.submit("/clear")
+                        chatPane.loadChat()  // Refresh the view
+                    }
+                    ToolTip.visible: hovered
+                    ToolTip.text: "Clear history and start fresh"
+                }
+
                 ToolButton {
                     text: "📋 Copy Last"
                     font.pixelSize: theme.fontSize > 0 ? theme.fontSize * 0.9 : 11