Fix unified pool visualization filesystem children display issues

- Fix extract_pool_name() to handle filesystem metrics (_fs_) correctly
- Prevent individual filesystem pools (nvme0n1_fs_boot, nvme0n1_fs_root) from being created
- Fix incorrect mount point names (was showing /root/mount instead of /)
- Only create filesystem entries when receiving mount_point metrics
- Add available_gb field to FileSystem struct for proper available space handling
- Ensure filesystem children show correct usage data instead of —% —GB/—GB

Cargo.lock

@@ -279,7 +279,7 @@ checksum = "a1d728cc89cf3aee9ff92b05e62b19ee65a02b5702cff7d5a377e32c6ae29d8d"
 
 [[package]]
 name = "cm-dashboard"
-version = "0.1.102"
+version = "0.1.103"
 dependencies = [
  "anyhow",
  "chrono",
@@ -301,7 +301,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-agent"
-version = "0.1.102"
+version = "0.1.103"
 dependencies = [
  "anyhow",
  "async-trait",

agent/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-agent"
-version = "0.1.103"
+version = "0.1.104"
 edition = "2021"
 
 [dependencies]

dashboard/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard"
-version = "0.1.103"
+version = "0.1.104"
 edition = "2021"
 
 [dependencies]

dashboard/src/ui/widgets/system.rs

@@ -70,6 +70,7 @@ struct FileSystem {
     usage_percent: Option<f32>,
     used_gb: Option<f32>,
     total_gb: Option<f32>,
+    available_gb: Option<f32>,
     status: Status,
 }
 
@@ -255,15 +256,21 @@ impl SystemWidget {
                             });
 
                             if !fs_exists {
-                                // Extract actual mount point from mount_point metric if available
-                                let mount_point = if metric_type == "mount_point" {
-                                    if let MetricValue::String(mount) = &metric.value {
-                                        mount.clone()
+                                // Only create filesystem entry if we have the mount_point metric
+                                // This ensures we get the correct mount point path
+                                if metric_type != "mount_point" {
+                                    continue; // Skip non-mount_point metrics if filesystem doesn't exist yet
+                                }
+                                
+                                let mount_point = if let MetricValue::String(mount) = &metric.value {
+                                    mount.clone()
+                                } else {
+                                    // Fallback: handle special cases
+                                    if fs_name == "root" {
+                                        "/".to_string()
                                     } else {
                                         format!("/{}", fs_name.replace('_', "/"))
                                     }
-                                } else {
-                                    format!("/{}", fs_name.replace('_', "/"))
                                 };
 
                                 pool.filesystems.push(FileSystem {
@@ -271,6 +278,7 @@ impl SystemWidget {
                                     usage_percent: None,
                                     used_gb: None,
                                     total_gb: None,
+                                    available_gb: None,
                                     status: Status::Unknown,
                                 });
                             }
@@ -301,6 +309,11 @@ impl SystemWidget {
                                             filesystem.total_gb = Some(total);
                                         }
                                     }
+                                    "available_gb" => {
+                                        if let MetricValue::Float(available) = metric.value {
+                                            filesystem.available_gb = Some(available);
+                                        }
+                                    }
                                     "mount_point" => {
                                         if let MetricValue::String(mount) = &metric.value {
                                             filesystem.mount_point = mount.clone();
@@ -336,10 +349,17 @@ impl SystemWidget {
                     return Some(metric_name[5..drive_start].to_string()); // Skip "disk_"
                 }
             }
+            // Handle filesystem metrics: disk_{pool}_fs_{filesystem}_{metric}
+            else if metric_name.contains("_fs_") {
+                if let Some(fs_pos) = metric_name.find("_fs_") {
+                    return Some(metric_name[5..fs_pos].to_string()); // Skip "disk_", extract pool name before "_fs_"
+                }
+            }
             // For pool-level metrics (usage_percent, used_gb, total_gb), take everything before the metric suffix
             else if let Some(suffix_pos) = metric_name.rfind("_usage_percent")
                 .or_else(|| metric_name.rfind("_used_gb"))
-                .or_else(|| metric_name.rfind("_total_gb")) {
+                .or_else(|| metric_name.rfind("_total_gb"))
+                .or_else(|| metric_name.rfind("_available_gb")) {
                 return Some(metric_name[5..suffix_pos].to_string()); // Skip "disk_"
             }
             // Fallback to old behavior for unknown patterns

shared/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-shared"
-version = "0.1.103"
+version = "0.1.104"
 edition = "2021"
 
 [dependencies]