Update services widget memory display and formatting

Improve services widget to show consistent usage/total format for both
RAM and Disk columns, using system totals when no service quotas exist.

Changes:
- Change column header from "Memory (GB)" to "RAM (GB)"
- Remove "GB" units from memory values (units now in header)
- Add system memory total detection from /proc/meminfo
- Use system memory total as default quota for services without limits
- Services now show "5.2/32.0" format for both RAM and disk

Both RAM and Disk columns now consistently display usage/quota format
where quota is either service-specific limit or system total capacity.

agent/src/collectors/service.rs

@@ -286,6 +286,30 @@ impl ServiceCollector {
     }
 
 
+    async fn get_system_memory_total(&self) -> Result<f32, CollectorError> {
+        // Read /proc/meminfo to get total system memory
+        let meminfo = fs::read_to_string("/proc/meminfo")
+            .await
+            .map_err(|e| CollectorError::IoError {
+                message: e.to_string(),
+            })?;
+            
+        for line in meminfo.lines() {
+            if let Some(mem_total_line) = line.strip_prefix("MemTotal:") {
+                let parts: Vec<&str> = mem_total_line.trim().split_whitespace().collect();
+                if let Some(mem_kb_str) = parts.first() {
+                    if let Ok(mem_kb) = mem_kb_str.parse::<f32>() {
+                        return Ok(mem_kb / 1024.0); // Convert KB to MB
+                    }
+                }
+            }
+        }
+        
+        Err(CollectorError::ParseError {
+            message: "Could not parse total memory".to_string(),
+        })
+    }
+
     async fn get_disk_usage(&self) -> Result<DiskUsage, CollectorError> {
         let output = Command::new("/run/current-system/sw/bin/df")
             .args(["-BG", "--output=size,used,avail", "/"])
@@ -1185,12 +1209,18 @@ impl Collector for ServiceCollector {
             used_gb: 0.0,
         });
 
-        // Set disk quota to system total capacity for services that don't have specific quotas
+        // Get system memory total for services without memory quotas
+        let system_memory_total_mb = self.get_system_memory_total().await.unwrap_or(8192.0); // Default 8GB
+
+        // Set quotas to system totals for services that don't have specific quotas
         let system_disk_capacity_gb = disk_usage.total_capacity_gb;
         for service in &mut services {
             if service.disk_quota_gb == 0.0 {
                 service.disk_quota_gb = system_disk_capacity_gb;
             }
+            if service.memory_quota_mb == 0.0 {
+                service.memory_quota_mb = system_memory_total_mb;
+            }
         }
         
         // Calculate overall services status

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(), "Memory (GB)".to_string(), "CPU".to_string(), "Disk".to_string()]
+        vec!["Service".to_string(), "RAM (GB)".to_string(), "CPU".to_string(), "Disk".to_string()]
     );
 
 
@@ -142,11 +142,11 @@ fn format_memory_value(used: f32, quota: f32) -> String {
     let quota_gb = quota / 1000.0;
     
     if quota > 0.05 {
-        format!("{:.1}/{:.1} GB", used_gb, quota_gb)
+        format!("{:.1}/{:.1}", used_gb, quota_gb)
     } else if used > 0.05 {
-        format!("{:.1} GB", used_gb)
+        format!("{:.1}", used_gb)
     } else {
-        "0.0 GB".to_string()
+        "0.0".to_string()
     }
 }