- Simplified command cases by removing unnecessary semicolons.

- Improved error handling in rebuild.nix for clarity and consistency.

modules/ncli/commands/maintenance.nix

@@ -1,10 +1,7 @@
 # ncli/commands/maintenance.nix — cleanup, diag, list-gens, trim, home-backups
-lib:
-
-let
+lib: let
   inherit (lib) project;
-in
-{
+in {
   cleanup_case = ''
     echo "Warning! This will remove old generations of your system."
     read -p "How many generations to keep (default: all)? " keep_count
@@ -33,7 +30,6 @@ in
     echo "Cleaning up old log files..." >> "$LOG_FILE"
     find "$LOG_DIR" -type f -mtime +3 -name "*.log" -delete >> "$LOG_FILE" 2>&1
     echo "Cleanup process logged to $LOG_FILE"
-    ;;
   '';
 
   diag_case = ''
@@ -50,7 +46,6 @@ in
       echo ""
     } > "$HOME/diag.txt"
     echo "Diagnostic report saved to $HOME/diag.txt"
-    ;;
   '';
 
   list_gens_case = ''
@@ -59,7 +54,6 @@ in
     echo ""
     echo "--- System Generations ---"
     nix profile history --profile /nix/var/nix/profiles/system | cat || echo "Could not list system generations."
-    ;;
   '';
 
   trim_case = ''
@@ -73,11 +67,9 @@ in
     else
       echo "Trim operation cancelled."
     fi
-    ;;
   '';
 
   home_backups_case = ''
     ls -a ~ | grep backup
-    ;;
   '';
 }