fix(update): normalize version strings for correct comparison

The version check was comparing "4.0.8" (no prefix) with "v4.0.8"
(with prefix), causing it to always think an update was available.

Now both versions are normalized to have the "v" prefix before
comparison, so "Already up to date!" works correctly.

deno.json

@@ -1,6 +1,6 @@
 {
   "name": "@serve.zone/nupst",
-  "version": "4.0.7",
+  "version": "4.0.9",
   "exports": "./mod.ts",
   "tasks": {
     "dev": "deno run --allow-all mod.ts",

ts/cli/service-handler.ts

@@ -133,22 +133,47 @@ export class ServiceHandler {
       );
 
       console.log('');
-      logger.info('Updating NUPST to latest version...');
-      console.log('');
+      logger.info('Checking for updates...');
 
       try {
+        // Get current version
+        const currentVersion = this.nupst.getVersion();
+
+        // Fetch latest version from Gitea API
+        const apiUrl = 'https://code.foss.global/api/v1/repos/serve.zone/nupst/releases/latest';
+        const response = execSync(`curl -sSL ${apiUrl}`).toString();
+        const release = JSON.parse(response);
+        const latestVersion = release.tag_name; // e.g., "v4.0.7"
+
+        // Normalize versions for comparison (ensure both have "v" prefix)
+        const normalizedCurrent = currentVersion.startsWith('v') ? currentVersion : `v${currentVersion}`;
+        const normalizedLatest = latestVersion.startsWith('v') ? latestVersion : `v${latestVersion}`;
+
+        logger.dim(`Current version: ${normalizedCurrent}`);
+        logger.dim(`Latest version:  ${normalizedLatest}`);
+        console.log('');
+
+        // Compare normalized versions
+        if (normalizedCurrent === normalizedLatest) {
+          logger.success('Already up to date!');
+          console.log('');
+          return;
+        }
+
+        logger.info(`New version available: ${latestVersion}`);
+        logger.dim('Downloading and installing...');
+        console.log('');
+
         // Download and run the install script
         // This handles everything: download binary, stop service, replace, restart
         const installUrl = 'https://code.foss.global/serve.zone/nupst/raw/branch/main/install.sh';
 
-        logger.dim('Downloading install script...');
         execSync(`curl -sSL ${installUrl} | bash`, {
           stdio: 'inherit', // Show install script output to user
         });
 
         console.log('');
-        logger.success('Update completed successfully!');
-        logger.dim('Run "nupst service status" to verify the update.');
+        logger.success(`Updated to ${latestVersion}`);
         console.log('');
       } catch (error) {
         console.log('');