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/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard"
-version = "0.1.79"
+version = "0.1.80"
 edition = "2021"
 
 [dependencies]