Improve services widget column headers and value formatting

- Update column headers to be more concise: RAM (GB) → RAM, CPU (%) → CPU, Disk (GB) → Disk
- Change sandbox column "no(ok)" to "-" for excluded services
- Implement smart unit formatting for memory and disk values (kB/MB/GB)
- Display quotas as (XG) format without decimals when limits exist
- Add format_bytes() helper for consistent unit display across metrics

dashboard/src/ui/services.rs

@@ -50,7 +50,7 @@ fn render_metrics(
     let mut data = WidgetData::new(
         title, 
         Some(WidgetStatus::new(widget_status)),
-        vec!["Service".to_string(), "RAM (GB)".to_string(), "CPU (%)".to_string(), "Disk (GB)".to_string(), "SB".to_string()]
+        vec!["Service".to_string(), "RAM".to_string(), "CPU".to_string(), "Disk".to_string(), "SB".to_string()]
     );
 
 
@@ -140,17 +140,26 @@ fn render_metrics(
 
 
 
-fn format_memory_value(used: f32, quota: f32) -> String {
-    let used_gb = used / 1000.0;
-    let quota_gb = quota / 1000.0;
-    
-    // Show usage/quota format only if quota exists, otherwise just usage
-    if quota > 0.05 {
-        format!("{:.1}/{:.1}", used_gb, quota_gb)
-    } else if used > 0.05 {
-        format!("{:.1}", used_gb)
+fn format_bytes(mb: f32) -> String {
+    if mb < 0.1 {
+        "0".to_string()
+    } else if mb < 1.0 {
+        format!("{:.0} kB", mb * 1000.0)
+    } else if mb < 1000.0 {
+        format!("{:.0} MB", mb)
     } else {
-        "0.0".to_string()
+        format!("{:.1} GB", mb / 1000.0)
+    }
+}
+
+fn format_memory_value(used: f32, quota: f32) -> String {
+    let used_value = format_bytes(used);
+    
+    if quota > 0.05 {
+        let quota_gb = quota / 1000.0;
+        format!("{} ({}G)", used_value, quota_gb as u32)
+    } else {
+        used_value
     }
 }
 
@@ -163,11 +172,12 @@ fn format_cpu_value(cpu_percent: f32) -> String {
 }
 
 fn format_disk_value(used: f32, quota: f32) -> String {
-    // Show usage/quota format only if quota exists, otherwise just usage
+    let used_value = format_bytes(used * 1000.0); // Convert GB to MB for format_bytes
+    
     if quota > 0.05 {
-        format!("{:.1}/{:.1}", used, quota)
+        format!("{} ({}G)", used_value, quota as u32)
     } else {
-        format!("{:.1}", used)
+        used_value
     }
 }
 
@@ -175,7 +185,7 @@ fn format_sandbox_value(is_sandboxed: bool, is_excluded: bool) -> String {
     if is_sandboxed {
         "yes".to_string()
     } else if is_excluded {
-        "no(ok)".to_string()  // Excluded services don't need sandboxing
+        "-".to_string()  // Excluded services don't need sandboxing
     } else {
         "no".to_string()      // Services that should be sandboxed but aren't
     }