Simplify backup timestamp display with raw TOML format and remove spacing

Replace timestamp parsing with direct display of start_time from backup TOML file to ensure timestamp always appears regardless of format. Remove empty line spacing above backup section for compact layout.

Changes:
- Remove parsed timestamp fields and use raw start_time string from TOML
- Display backup time directly from TOML file without parsing
- Remove blank line above backup section for tighter layout
- Simplify BackupData structure by removing last_run and next_scheduled fields

Version bump to v0.1.150

dashboard/src/ui/widgets/system.rs

@@ -39,8 +39,7 @@ pub struct SystemWidget {
     
     // Backup metrics
     backup_status: String,
-    backup_last_run: Option<u64>,
-    backup_next_scheduled: Option<u64>,
+    backup_start_time_raw: Option<String>,
     backup_disk_serial: Option<String>,
     backup_disk_usage_percent: Option<f32>,
     backup_disk_used_gb: Option<f32>,
@@ -104,8 +103,7 @@ impl SystemWidget {
             tmpfs_mounts: Vec::new(),
             storage_pools: Vec::new(),
             backup_status: "unknown".to_string(),
-            backup_last_run: None,
-            backup_next_scheduled: None,
+            backup_start_time_raw: None,
             backup_disk_serial: None,
             backup_disk_usage_percent: None,
             backup_disk_used_gb: None,
@@ -196,8 +194,7 @@ impl Widget for SystemWidget {
         // Extract backup data
         let backup = &agent_data.backup;
         self.backup_status = backup.status.clone();
-        self.backup_last_run = backup.last_run;
-        self.backup_next_scheduled = backup.next_scheduled;
+        self.backup_start_time_raw = backup.start_time_raw.clone();
         self.backup_last_size_gb = backup.last_backup_size_gb;
 
         if let Some(disk) = &backup.repository_disk {
@@ -427,27 +424,17 @@ impl SystemWidget {
             let disk_spans = StatusIcons::create_status_spans(backup_status, &disk_text);
             lines.push(Line::from(disk_spans));
 
-            // Last backup time
-            if let Some(last_run) = self.backup_last_run {
-                let time_ago = self.format_time_ago(last_run);
-                let last_text = if let Some(size) = self.backup_last_size_gb {
-                    format!("Last: {} ({:.1}GB)", time_ago, size)
+            // Show backup time from TOML if available
+            if let Some(start_time) = &self.backup_start_time_raw {
+                let time_text = if let Some(size) = self.backup_last_size_gb {
+                    format!("Time: {} ({:.1}GB)", start_time, size)
                 } else {
-                    format!("Last: {}", time_ago)
+                    format!("Time: {}", start_time)
                 };
                 
                 lines.push(Line::from(vec![
                     Span::styled("  ├─ ", Typography::tree()),
-                    Span::styled(last_text, Typography::secondary())
-                ]));
-            }
-
-            // Next backup time
-            if let Some(next_scheduled) = self.backup_next_scheduled {
-                let next_text = format!("Next: {}", self.format_time_until(next_scheduled));
-                lines.push(Line::from(vec![
-                    Span::styled("  ├─ ", Typography::tree()),
-                    Span::styled(next_text, Typography::secondary())
+                    Span::styled(time_text, Typography::secondary())
                 ]));
             }
 
@@ -602,9 +589,6 @@ impl SystemWidget {
 
         // Backup section (if available)
         if self.backup_status != "unavailable" && self.backup_status != "unknown" {
-            lines.push(Line::from(vec![
-                Span::styled("", Typography::secondary()) // Empty line for spacing
-            ]));
             lines.push(Line::from(vec![
                 Span::styled("Backup:", Typography::widget_title())
             ]));