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

shared/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-shared"
-version = "0.1.149"
+version = "0.1.150"
 edition = "2021"
 
 [dependencies]

shared/src/agent_data.rs

@@ -138,12 +138,11 @@ pub struct SubServiceMetric {
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct BackupData {
     pub status: String,
-    pub last_run: Option<u64>,
-    pub next_scheduled: Option<u64>,
     pub total_size_gb: Option<f32>,
     pub repository_health: Option<String>,
     pub repository_disk: Option<BackupDiskData>,
     pub last_backup_size_gb: Option<f32>,
+    pub start_time_raw: Option<String>,
 }
 
 /// Backup repository disk information
@@ -193,12 +192,11 @@ impl AgentData {
             services: Vec::new(),
             backup: BackupData {
                 status: "unknown".to_string(),
-                last_run: None,
-                next_scheduled: None,
                 total_size_gb: None,
                 repository_health: None,
                 repository_disk: None,
                 last_backup_size_gb: None,
+                start_time_raw: None,
             },
         }
     }