Add sudo support and line count to log viewing commands

- Add sudo to journalctl command for proper systemd log access
- Add sudo to tail command for system log file access
- Add -n 50 to tail command to match journalctl behavior
- Both J and L keys now show last 50 lines before following

Ensures consistent behavior and proper permissions for all log viewing.

Cargo.lock

@@ -270,7 +270,7 @@ checksum = "a1d728cc89cf3aee9ff92b05e62b19ee65a02b5702cff7d5a377e32c6ae29d8d"
 
 [[package]]
 name = "cm-dashboard"
-version = "0.1.49"
+version = "0.1.50"
 dependencies = [
  "anyhow",
  "chrono",
@@ -291,7 +291,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-agent"
-version = "0.1.49"
+version = "0.1.50"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -314,7 +314,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-shared"
-version = "0.1.49"
+version = "0.1.50"
 dependencies = [
  "chrono",
  "serde",