Improve service selection UI and help text

- Fix service icons to use background color when selected for better visibility against blue selection background
- Combine start/stop service help text entries into single "s/S: Start/Stop Service"
- Change help text keys to lowercase (r: Rebuild Host, q: Quit)
- Bump version to v0.1.34

dashboard/src/ui/mod.rs

@@ -642,12 +642,11 @@ impl TuiApp {
         // Global shortcuts
         shortcuts.push("Tab: Switch Host".to_string());
         shortcuts.push("↑↓/jk: Select Service".to_string());
-        shortcuts.push("R: Rebuild Host".to_string());
-        shortcuts.push("S: Start Service".to_string());
-        shortcuts.push("Shift+S: Stop Service".to_string());
+        shortcuts.push("r: Rebuild Host".to_string());
+        shortcuts.push("s/S: Start/Stop Service".to_string());
         
         // Always show quit
-        shortcuts.push("Q: Quit".to_string());
+        shortcuts.push("q: Quit".to_string());
         
         shortcuts
     }