Remove hardcoded /tmp autodetection and implement proper tmpfs monitoring

- Remove /tmp autodetection from disk collector (57 lines removed)
- Add tmpfs monitoring to memory collector with get_tmpfs_metrics() method
- Generate memory_tmp_* metrics for proper RAM-based tmpfs monitoring
- Fix type annotations in tmpfs parsing for compilation
- System widget now correctly displays tmpfs usage in RAM section

dashboard/src/ui/widgets/system.rs

@@ -202,7 +202,10 @@ impl SystemWidget {
             }
         }
 
-        self.storage_pools = pools.into_values().collect();
+        // Convert to sorted vec for consistent ordering
+        let mut pool_list: Vec<StoragePool> = pools.into_values().collect();
+        pool_list.sort_by(|a, b| a.name.cmp(&b.name)); // Sort alphabetically by name
+        self.storage_pools = pool_list;
     }
 
     /// Extract pool name from disk metric name
@@ -354,21 +357,6 @@ impl Widget for SystemWidget {
                         self.memory_total_gb = Some(total);
                     }
                 }
-                "disk_tmp_usage_percent" => {
-                    if let MetricValue::Float(usage) = metric.value {
-                        self.tmp_usage_percent = Some(usage);
-                    }
-                }
-                "disk_tmp_used_gb" => {
-                    if let MetricValue::Float(used) = metric.value {
-                        self.tmp_used_gb = Some(used);
-                    }
-                }
-                "disk_tmp_total_gb" => {
-                    if let MetricValue::Float(total) = metric.value {
-                        self.tmp_total_gb = Some(total);
-                    }
-                }
                 _ => {}
             }
         }
@@ -430,8 +418,7 @@ impl Widget for SystemWidget {
         // Storage section with tree structure
         lines.extend(self.render_storage());
 
-        let paragraph = Paragraph::new(Text::from(lines))
-            .block(Block::default().borders(Borders::ALL).title("System"));
+        let paragraph = Paragraph::new(Text::from(lines));
 
         frame.render_widget(paragraph, area);
     }