style: configure deno fmt to use single quotes

- Add singleQuote: true to deno.json fmt configuration
- Reformat all files with single quotes using deno fmt

ts/cli.ts

@@ -1,4 +1,4 @@
-import { execSync } from "node:child_process";
+import { execSync } from 'node:child_process';
 import { Nupst } from './nupst.ts';
 import { logger } from './logger.ts';
 
@@ -62,7 +62,11 @@ export class NupstCli {
    * @param commandArgs Additional command arguments
    * @param debugMode Whether debug mode is enabled
    */
-  private async executeCommand(command: string, commandArgs: string[], debugMode: boolean): Promise<void> {
+  private async executeCommand(
+    command: string,
+    commandArgs: string[],
+    debugMode: boolean,
+  ): Promise<void> {
     // Get access to the handlers
     const upsHandler = this.nupst.getUpsHandler();
     const groupHandler = this.nupst.getGroupHandler();
@@ -87,7 +91,7 @@ export class NupstCli {
           break;
         case 'restart':
           await serviceHandler.stop();
-          await new Promise(resolve => setTimeout(resolve, 2000)); // Wait 2s
+          await new Promise((resolve) => setTimeout(resolve, 2000)); // Wait 2s
           await serviceHandler.start();
           break;
         case 'status':
@@ -263,7 +267,9 @@ export class NupstCli {
         await serviceHandler.logs();
         break;
       case 'daemon-start':
-        logger.log("Note: 'nupst daemon-start' is deprecated. Use 'nupst service start-daemon' instead.");
+        logger.log(
+          "Note: 'nupst daemon-start' is deprecated. Use 'nupst service start-daemon' instead.",
+        );
         await serviceHandler.daemonStart(debugMode);
         break;
 
@@ -328,8 +334,12 @@ export class NupstCli {
             logger.logBoxLine(`${ups.name} (${ups.id}):`);
             logger.logBoxLine(`  Host: ${ups.snmp.host}:${ups.snmp.port}`);
             logger.logBoxLine(`  Model: ${ups.snmp.upsModel}`);
-            logger.logBoxLine(`  Thresholds: ${ups.thresholds.battery}% battery, ${ups.thresholds.runtime} min runtime`);
-            logger.logBoxLine(`  Groups: ${ups.groups.length > 0 ? ups.groups.join(', ') : 'None'}`);
+            logger.logBoxLine(
+              `  Thresholds: ${ups.thresholds.battery}% battery, ${ups.thresholds.runtime} min runtime`,
+            );
+            logger.logBoxLine(
+              `  Groups: ${ups.groups.length > 0 ? ups.groups.join(', ') : 'None'}`,
+            );
             logger.logBoxLine('');
           }
           logger.logBoxEnd();
@@ -344,11 +354,16 @@ export class NupstCli {
             if (group.description) {
               logger.logBoxLine(`  Description: ${group.description}`);
             }
-            
+
             // List UPS devices in this group
-            const upsInGroup = config.upsDevices.filter(ups => ups.groups && ups.groups.includes(group.id));
-            logger.logBoxLine(`  UPS Devices: ${upsInGroup.length > 0 ? 
-              upsInGroup.map(ups => ups.name).join(', ') : 'None'}`);
+            const upsInGroup = config.upsDevices.filter((ups) =>
+              ups.groups && ups.groups.includes(group.id)
+            );
+            logger.logBoxLine(
+              `  UPS Devices: ${
+                upsInGroup.length > 0 ? upsInGroup.map((ups) => ups.name).join(', ') : 'None'
+              }`,
+            );
             logger.logBoxLine('');
           }
           logger.logBoxEnd();
@@ -390,11 +405,15 @@ export class NupstCli {
           // Show OIDs if custom model is selected
           if (config.snmp.upsModel === 'custom' && config.snmp.customOIDs) {
             logger.logBoxLine('Custom OIDs:');
-            logger.logBoxLine(`  Power Status: ${config.snmp.customOIDs.POWER_STATUS || 'Not set'}`);
             logger.logBoxLine(
-              `  Battery Capacity: ${config.snmp.customOIDs.BATTERY_CAPACITY || 'Not set'}`
+              `  Power Status: ${config.snmp.customOIDs.POWER_STATUS || 'Not set'}`,
+            );
+            logger.logBoxLine(
+              `  Battery Capacity: ${config.snmp.customOIDs.BATTERY_CAPACITY || 'Not set'}`,
+            );
+            logger.logBoxLine(
+              `  Battery Runtime: ${config.snmp.customOIDs.BATTERY_RUNTIME || 'Not set'}`,
             );
-            logger.logBoxLine(`  Battery Runtime: ${config.snmp.customOIDs.BATTERY_RUNTIME || 'Not set'}`);
           }
         }
 
@@ -435,7 +454,11 @@ export class NupstCli {
         // Ignore errors checking service status
       }
     } catch (error) {
-      logger.error(`Failed to display configuration: ${error instanceof Error ? error.message : String(error)}`);
+      logger.error(
+        `Failed to display configuration: ${
+          error instanceof Error ? error.message : String(error)
+        }`,
+      );
     }
   }
 
@@ -584,4 +607,4 @@ Examples:
   nupst group remove dc-1 - Remove group with ID 'dc-1'
 `);
   }
-}
+}