gui: procs window improvements

- Output panel always visible with placeholder text
- View Output clears panel before refreshing
- Added Dismiss button to close window
- Process list has fixed height, output panel fills remaining space

kde/gui/ProcManagerWindow.qml

@@ -110,7 +110,8 @@ Window {
         ListView {
             id: procList
             Layout.fillWidth: true
-            Layout.fillHeight: true
+            Layout.preferredHeight: 180
+            Layout.minimumHeight: 100
             model: procs
             clip: true
 
@@ -193,22 +194,24 @@ Window {
             }
         }
 
-        // Output pane (expandable)
+        // Output pane (always visible)
         GroupBox {
             Layout.fillWidth: true
-            Layout.preferredHeight: outputText.length > 0 ? 150 : 0
-            visible: outputText.length > 0
-            title: "Output (PID " + selectedPid + ")"
+            Layout.fillHeight: true
+            Layout.minimumHeight: 100
+            title: selectedPid > 0 ? "Output (PID " + selectedPid + ")" : "Output"
 
             ScrollView {
                 anchors.fill: parent
                 TextArea {
+                    id: outputArea
                     text: outputText
                     readOnly: true
                     font.family: "monospace"
                     font.pointSize: 9
                     wrapMode: TextEdit.Wrap
                     selectByMouse: true
+                    placeholderText: "Select a process and click View Output"
                 }
             }
         }
@@ -229,6 +232,7 @@ Window {
                 icon.name: "document-preview"
                 enabled: selectedPid > 0
                 onClicked: {
+                    outputText = ""
                     outputText = ollie.procOutput(currentSessionId, currentAgentId, selectedPid)
                 }
             }
@@ -254,6 +258,12 @@ Window {
                     Qt.callLater(refresh)
                 }
             }
+
+            Button {
+                text: "Dismiss"
+                icon.name: "window-close"
+                onClicked: procWindow.close()
+            }
         }
     }