Fix tmux popup title flag for service logs feature

Fix journalctl popup that was failing with 'can't find session' error:

Issue Resolution:
- Change tmux display-popup flag from -t to -T for setting popup title
- -t flag was incorrectly trying to target a session named 'Logs: servicename'
- -T flag correctly sets the popup window title

The J key (Shift+j) service logs feature now works properly, opening
an 80% tmux popup with journalctl -f for real-time log viewing.

Bump version to v0.1.49

agent/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-agent"
-version = "0.1.48"
+version = "0.1.49"
 edition = "2021"
 
 [dependencies]