Remove all scrolling code and user-stopped tracking logic

- Remove scroll offset fields from HostWidgets struct
- Replace scrolling with simple "X more below" indicators in all widgets
- Remove user-stopped service tracking from agent (now uses SSH control)
- Inactive services now consistently show Status::Inactive with empty circles
- Simplify widget render methods by removing scroll parameters
- Clean up unused imports and legacy scrolling infrastructure
- Fix journalctl command to use -fu for proper log following

dashboard/src/ui/widgets/system.rs

@@ -438,8 +438,8 @@ impl Widget for SystemWidget {
 }
 
 impl SystemWidget {
-    /// Render with scroll offset support
-    pub fn render_with_scroll(&mut self, frame: &mut Frame, area: Rect, scroll_offset: usize, hostname: &str, config: Option<&crate::config::DashboardConfig>) {
+    /// Render system widget  
+    pub fn render(&mut self, frame: &mut Frame, area: Rect, hostname: &str, config: Option<&crate::config::DashboardConfig>) {
         let mut lines = Vec::new();
 
         // NixOS section
@@ -560,22 +560,22 @@ impl SystemWidget {
         let total_lines = lines.len();
         let available_height = area.height as usize;
         
-        // Always apply scrolling if scroll_offset > 0, even if content fits
-        if scroll_offset > 0 || total_lines > available_height {
-            let max_scroll = if total_lines > available_height {
-                total_lines - available_height
-            } else {
-                total_lines.saturating_sub(1)
-            };
-            let effective_scroll = scroll_offset.min(max_scroll);
-            
-            // Take only the visible portion after scrolling
-            let visible_lines: Vec<Line> = lines
+        // Show only what fits, with "X more below" if needed
+        if total_lines > available_height {
+            let lines_for_content = available_height.saturating_sub(1); // Reserve one line for "more below"
+            let mut visible_lines: Vec<Line> = lines
                 .into_iter()
-                .skip(effective_scroll)
-                .take(available_height)
+                .take(lines_for_content)
                 .collect();
-                
+            
+            let hidden_below = total_lines.saturating_sub(lines_for_content);
+            if hidden_below > 0 {
+                let more_line = Line::from(vec![
+                    Span::styled(format!("... {} more below", hidden_below), Typography::muted())
+                ]);
+                visible_lines.push(more_line);
+            }
+            
             let paragraph = Paragraph::new(Text::from(visible_lines));
             frame.render_widget(paragraph, area);
         } else {