Add custom service log file support with L key

- Add ServiceLogConfig structure for per-host service log paths
- Implement L key handler for custom log file viewing via tmux popup
- Update dashboard config to support service_logs HashMap
- Add tail -f command execution over SSH for real-time log streaming
- Update status line to show L: Custom shortcut
- Document configuration format in CLAUDE.md

Each service can now have custom log file paths configured per host,
accessible via L key with same tmux popup interface as journalctl.

CLAUDE.md

@@ -20,12 +20,28 @@ A high-performance Rust-based TUI dashboard for monitoring CMTEC infrastructure.
 - Persistent storage survives agent restarts
 - Automatic flag clearing when services are restarted via dashboard
 
+### Custom Service Logs
+- Configure service-specific log file paths per host in dashboard config
+- Press `L` on any service to view custom log files via `tail -f`
+- Configuration format in dashboard config:
+```toml
+[service_logs]
+hostname1 = [
+  { service_name = "nginx", log_file_path = "/var/log/nginx/access.log" },
+  { service_name = "app", log_file_path = "/var/log/myapp/app.log" }
+]
+hostname2 = [
+  { service_name = "database", log_file_path = "/var/log/postgres/postgres.log" }
+]
+```
+
 ### Service Management
 - **Direct Control**: Arrow keys (↑↓) or vim keys (j/k) navigate services
 - **Service Actions**: 
   - `s` - Start service (sends UserStart command)
   - `S` - Stop service (sends UserStop command)
   - `J` - Show service logs (journalctl in tmux popup)
+  - `L` - Show custom log files (tail -f custom paths in tmux popup)
   - `R` - Rebuild current host
 - **Visual Status**: Green ● (active), Yellow ◐ (inactive), Red ◯ (failed)
 - **Transitional Icons**: Blue arrows during operations
@@ -34,6 +50,7 @@ A high-performance Rust-based TUI dashboard for monitoring CMTEC infrastructure.
 - **Tab**: Switch between hosts
 - **↑↓ or j/k**: Select services
 - **J**: Show service logs (journalctl)
+- **L**: Show custom log files
 - **q**: Quit dashboard
 
 ## Core Architecture Principles

Cargo.lock

@@ -270,7 +270,7 @@ checksum = "a1d728cc89cf3aee9ff92b05e62b19ee65a02b5702cff7d5a377e32c6ae29d8d"
 
 [[package]]
 name = "cm-dashboard"
-version = "0.1.48"
+version = "0.1.49"
 dependencies = [
  "anyhow",
  "chrono",
@@ -291,7 +291,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-agent"
-version = "0.1.48"
+version = "0.1.49"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -314,7 +314,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-shared"
-version = "0.1.48"
+version = "0.1.49"
 dependencies = [
  "chrono",
  "serde",

agent/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-agent"
-version = "0.1.49"
+version = "0.1.50"
 edition = "2021"
 
 [dependencies]

dashboard/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard"
-version = "0.1.49"
+version = "0.1.50"
 edition = "2021"
 
 [dependencies]

dashboard/src/config/mod.rs

@@ -9,6 +9,7 @@ pub struct DashboardConfig {
     pub hosts: HostsConfig,
     pub system: SystemConfig,
     pub ssh: SshConfig,
+    pub service_logs: std::collections::HashMap<String, Vec<ServiceLogConfig>>,
 }
 
 /// ZMQ consumer configuration
@@ -39,6 +40,13 @@ pub struct SshConfig {
     pub rebuild_alias: String,
 }
 
+/// Service log file configuration per host
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ServiceLogConfig {
+    pub service_name: String,
+    pub log_file_path: String,
+}
+
 impl DashboardConfig {
     pub fn load_from_file<P: AsRef<Path>>(path: P) -> Result<Self> {
         let path = path.as_ref();

dashboard/src/ui/mod.rs

@@ -308,6 +308,34 @@ ssh -tt {}@{} 'bash -ic {}'",
                             .ok(); // Ignore errors, tmux will handle them
                     }
                 }
+                KeyCode::Char('L') => {
+                    // Show custom service log file in tmux popup
+                    if let (Some(service_name), Some(hostname)) = (self.get_selected_service(), self.current_host.clone()) {
+                        // Check if this service has a custom log file configured
+                        if let Some(host_logs) = self.config.service_logs.get(&hostname) {
+                            if let Some(log_config) = host_logs.iter().find(|config| config.service_name == service_name) {
+                                let tail_command = format!(
+                                    "ssh -tt {}@{} 'tail -f {}'",
+                                    self.config.ssh.rebuild_user,
+                                    hostname,
+                                    log_config.log_file_path
+                                );
+                                
+                                std::process::Command::new("tmux")
+                                    .arg("display-popup")
+                                    .arg("-w")
+                                    .arg("80%")
+                                    .arg("-h") 
+                                    .arg("80%")
+                                    .arg("-T")
+                                    .arg(format!("Custom Log: {}", service_name))
+                                    .arg(&tail_command)
+                                    .spawn()
+                                    .ok(); // Ignore errors, tmux will handle them
+                            }
+                        }
+                    }
+                }
                 KeyCode::Char('b') => {
                     // Trigger backup
                     if let Some(hostname) = self.current_host.clone() {
@@ -718,6 +746,7 @@ ssh -tt {}@{} 'bash -ic {}'",
         shortcuts.push("r: Rebuild".to_string());
         shortcuts.push("s/S: Start/Stop".to_string());
         shortcuts.push("J: Logs".to_string());
+        shortcuts.push("L: Custom".to_string());
         
         // Always show quit
         shortcuts.push("q: Quit".to_string());

shared/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-shared"
-version = "0.1.49"
+version = "0.1.50"
 edition = "2021"
 
 [dependencies]