diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..73a2a6b
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,37 @@
+# Changelog
+
+All notable changes to CloudCLI UI will be documented in this file.
+
+
+## [1.20.1](https://github.com/siteboon/claudecodeui/compare/v1.19.1...v1.20.1) (2026-02-23)
+
+### New Features
+
+* implement install mode detection and update commands in version upgrade process ([f986004](https://github.com/siteboon/claudecodeui/commit/f986004319207b068431f9f6adf338a8ce8decfc))
+* migrate legacy database to new location and improve last login update handling ([50e097d](https://github.com/siteboon/claudecodeui/commit/50e097d4ac498aa9f1803ef3564843721833dc19))
+
+## [1.19.1](https://github.com/siteboon/claudecodeui/compare/v1.19.0...v1.19.1) (2026-02-23)
+
+### Bug Fixes
+
+* add prepublishOnly script to build before publishing ([82efac4](https://github.com/siteboon/claudecodeui/commit/82efac4704cab11ed8d1a05fe84f41312140b223))
+
+## [1.19.0](https://github.com/siteboon/claudecodeui/compare/v1.18.2...v1.19.0) (2026-02-23)
+
+### New Features
+
+* add HOST environment variable for configurable bind address ([#360](https://github.com/siteboon/claudecodeui/issues/360)) ([cccd915](https://github.com/siteboon/claudecodeui/commit/cccd915c336192216b6e6f68e2b5f3ece0ccf966))
+* subagent tool grouping ([#398](https://github.com/siteboon/claudecodeui/issues/398)) ([0207a1f](https://github.com/siteboon/claudecodeui/commit/0207a1f3a3c87f1c6c1aee8213be999b23289386))
+
+### Bug Fixes
+
+* **macos:** fix node-pty posix_spawnp error with postinstall script ([#347](https://github.com/siteboon/claudecodeui/issues/347)) ([38a593c](https://github.com/siteboon/claudecodeui/commit/38a593c97fdb2bb7f051e09e8e99c16035448655)), closes [#284](https://github.com/siteboon/claudecodeui/issues/284)
+* slash commands with arguments bypass command execution ([#392](https://github.com/siteboon/claudecodeui/issues/392)) ([597e9c5](https://github.com/siteboon/claudecodeui/commit/597e9c54b76e7c6cd1947299c668c78d24019cab))
+
+### Refactoring
+
+* **releases:** Create a contributing guide and proper release notes using a release-it plugin ([fc369d0](https://github.com/siteboon/claudecodeui/commit/fc369d047e13cba9443fe36c0b6bb2ce3beaf61c))
+
+### Maintenance
+
+* update @anthropic-ai/claude-agent-sdk to version 0.1.77 in package-lock.json ([#410](https://github.com/siteboon/claudecodeui/issues/410)) ([7ccbc8d](https://github.com/siteboon/claudecodeui/commit/7ccbc8d92d440e18c157b656c9ea2635044a64f6))
diff --git a/package-lock.json b/package-lock.json
index 762f59f..4b54657 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@siteboon/claude-code-ui",
-  "version": "1.18.2",
+  "version": "1.20.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@siteboon/claude-code-ui",
-      "version": "1.18.2",
+      "version": "1.20.1",
       "hasInstallScript": true,
       "license": "GPL-3.0",
       "dependencies": {
diff --git a/package.json b/package.json
index 3331568..82dd5a8 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@siteboon/claude-code-ui",
-  "version": "1.18.2",
+  "version": "1.20.1",
   "description": "A web-based UI for Claude Code CLI",
   "type": "module",
   "main": "server/index.js",
@@ -32,6 +32,7 @@
     "typecheck": "tsc --noEmit -p tsconfig.json",
     "start": "npm run build && npm run server",
     "release": "./release.sh",
+    "prepublishOnly": "npm run build",
     "postinstall": "node scripts/fix-node-pty.js"
   },
   "keywords": [
diff --git a/server/database/db.js b/server/database/db.js
index dbb9d37..e805545 100644
--- a/server/database/db.js
+++ b/server/database/db.js
@@ -40,6 +40,22 @@ if (process.env.DATABASE_PATH) {
   }
 }
 
+// As part of 1.19.2 we are introducing a new location for auth.db. The below handles exisitng moving legacy database from install directory to new location
+const LEGACY_DB_PATH = path.join(__dirname, 'auth.db');
+if (DB_PATH !== LEGACY_DB_PATH && !fs.existsSync(DB_PATH) && fs.existsSync(LEGACY_DB_PATH)) {
+  try {
+    fs.copyFileSync(LEGACY_DB_PATH, DB_PATH);
+    console.log(`[MIGRATION] Copied database from ${LEGACY_DB_PATH} to ${DB_PATH}`);
+    for (const suffix of ['-wal', '-shm']) {
+      if (fs.existsSync(LEGACY_DB_PATH + suffix)) {
+        fs.copyFileSync(LEGACY_DB_PATH + suffix, DB_PATH + suffix);
+      }
+    }
+  } catch (err) {
+    console.warn(`[MIGRATION] Could not copy legacy database: ${err.message}`);
+  }
+}
+
 // Create database connection
 const db = new Database(DB_PATH);
 
@@ -128,12 +144,12 @@ const userDb = {
     }
   },
 
-  // Update last login time
+  // Update last login time (non-fatal — logged but not thrown)
   updateLastLogin: (userId) => {
     try {
       db.prepare('UPDATE users SET last_login = CURRENT_TIMESTAMP WHERE id = ?').run(userId);
     } catch (err) {
-      throw err;
+      console.warn('Failed to update last login:', err.message);
     }
   },
 
diff --git a/server/index.js b/server/index.js
index cbf68b2..4b70cd3 100755
--- a/server/index.js
+++ b/server/index.js
@@ -9,6 +9,8 @@ import { dirname } from 'path';
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = dirname(__filename);
 
+const installMode = fs.existsSync(path.join(__dirname, '..', '.git')) ? 'git' : 'npm';
+
 // ANSI color codes for terminal output
 const colors = {
     reset: '\x1b[0m',
@@ -333,7 +335,8 @@ app.use(express.urlencoded({ limit: '50mb', extended: true }));
 app.get('/health', (req, res) => {
   res.json({
     status: 'ok',
-    timestamp: new Date().toISOString()
+    timestamp: new Date().toISOString(),
+    installMode
   });
 });
 
@@ -410,11 +413,13 @@ app.post('/api/system/update', authenticateToken, async (req, res) => {
 
         console.log('Starting system update from directory:', projectRoot);
 
-        // Run the update command
-        const updateCommand = 'git checkout main && git pull && npm install';
+        // Run the update command based on install mode
+        const updateCommand = installMode === 'git'
+            ? 'git checkout main && git pull && npm install'
+            : 'npm install -g @siteboon/claude-code-ui@latest';
 
         const child = spawn('sh', ['-c', updateCommand], {
-            cwd: projectRoot,
+            cwd: installMode === 'git' ? projectRoot : os.homedir(),
             env: process.env
         });
 
diff --git a/server/load-env.js b/server/load-env.js
index 21280a4..ad9ccbb 100644
--- a/server/load-env.js
+++ b/server/load-env.js
@@ -1,5 +1,6 @@
 // Load environment variables from .env before other imports execute.
 import fs from 'fs';
+import os from 'os';
 import path from 'path';
 import { fileURLToPath } from 'url';
 import { dirname } from 'path';
@@ -22,3 +23,7 @@ try {
 } catch (e) {
   console.log('No .env file found or error reading it:', e.message);
 }
+
+if (!process.env.DATABASE_PATH) {
+  process.env.DATABASE_PATH = path.join(os.homedir(), '.cloudcli', 'auth.db');
+}
diff --git a/server/routes/auth.js b/server/routes/auth.js
index 82a7c0d..be4c38c 100644
--- a/server/routes/auth.js
+++ b/server/routes/auth.js
@@ -53,11 +53,11 @@ router.post('/register', async (req, res) => {
       // Generate token
       const token = generateToken(user);
       
-      // Update last login
+      db.prepare('COMMIT').run();
+
+      // Update last login (non-fatal, outside transaction)
       userDb.updateLastLogin(user.id);
 
-      db.prepare('COMMIT').run();
-      
       res.json({
         success: true,
         user: { id: user.id, username: user.username },
diff --git a/shared/modelConstants.js b/shared/modelConstants.js
index 1f6ec1d..4022340 100644
--- a/shared/modelConstants.js
+++ b/shared/modelConstants.js
@@ -63,5 +63,5 @@ export const CODEX_MODELS = {
     { value: 'o4-mini', label: 'O4-mini' }
   ],
 
-  DEFAULT: 'gpt-5.2'
+  DEFAULT: 'gpt-5.3-codex'
 };
diff --git a/src/components/sidebar/view/Sidebar.tsx b/src/components/sidebar/view/Sidebar.tsx
index d8633c9..842bda8 100644
--- a/src/components/sidebar/view/Sidebar.tsx
+++ b/src/components/sidebar/view/Sidebar.tsx
@@ -38,7 +38,7 @@ function Sidebar({
 }: SidebarProps) {
   const { t } = useTranslation(['sidebar', 'common']);
   const { isPWA } = useDeviceSettings({ trackMobile: false });
-  const { updateAvailable, latestVersion, currentVersion, releaseInfo } = useVersionCheck(
+  const { updateAvailable, latestVersion, currentVersion, releaseInfo, installMode } = useVersionCheck(
     'siteboon',
     'claudecodeui',
   );
@@ -200,6 +200,7 @@ function Sidebar({
         releaseInfo={releaseInfo}
         currentVersion={currentVersion}
         latestVersion={latestVersion}
+        installMode={installMode}
         t={t}
       />
 
diff --git a/src/components/sidebar/view/modals/VersionUpgradeModal.tsx b/src/components/sidebar/view/modals/VersionUpgradeModal.tsx
index e787dee..bdf765b 100644
--- a/src/components/sidebar/view/modals/VersionUpgradeModal.tsx
+++ b/src/components/sidebar/view/modals/VersionUpgradeModal.tsx
@@ -3,6 +3,7 @@ import { useTranslation } from "react-i18next";
 import { authenticatedFetch } from "../../../../utils/api";
 import { ReleaseInfo } from "../../../../types/sharedTypes";
 import { copyTextToClipboard } from "../../../../utils/clipboard";
+import type { InstallMode } from "../../../../hooks/useVersionCheck";
 
 interface VersionUpgradeModalProps {
     isOpen: boolean;
@@ -10,6 +11,7 @@ interface VersionUpgradeModalProps {
     releaseInfo: ReleaseInfo | null;
     currentVersion: string;
     latestVersion: string | null;
+    installMode: InstallMode;
 }
 
 export default function VersionUpgradeModal({
@@ -17,9 +19,13 @@ export default function VersionUpgradeModal({
     onClose,
     releaseInfo,
     currentVersion,
-    latestVersion
+    latestVersion,
+    installMode
 }: VersionUpgradeModalProps) {
     const { t } = useTranslation('common');
+    const upgradeCommand = installMode === 'npm'
+        ? t('versionUpdate.npmUpgradeCommand')
+        : 'git checkout main && git pull && npm install';
     const [isUpdating, setIsUpdating] = useState(false);
     const [updateOutput, setUpdateOutput] = useState('');
     const [updateError, setUpdateError] = useState('');
@@ -151,7 +157,7 @@ export default function VersionUpgradeModal({
                         <h3 className="text-sm font-medium text-gray-900 dark:text-white">{t('versionUpdate.manualUpgrade')}</h3>
                         <div className="bg-gray-100 dark:bg-gray-800 rounded-lg p-3 border">
                             <code className="text-sm text-gray-800 dark:text-gray-200 font-mono">
-                                git checkout main && git pull && npm install
+                                {upgradeCommand}
                             </code>
                         </div>
                         <p className="text-xs text-gray-600 dark:text-gray-400">
@@ -171,7 +177,7 @@ export default function VersionUpgradeModal({
                     {!updateOutput && (
                         <>
                             <button
-                                onClick={() => copyTextToClipboard('git checkout main && git pull && npm install')}
+                                onClick={() => copyTextToClipboard(upgradeCommand)}
                                 className="flex-1 px-4 py-2 text-sm font-medium text-gray-700 dark:text-gray-300 bg-gray-100 dark:bg-gray-700 hover:bg-gray-200 dark:hover:bg-gray-600 rounded-md transition-colors"
                             >
                                 {t('versionUpdate.buttons.copyCommand')}
diff --git a/src/components/sidebar/view/subcomponents/SidebarModals.tsx b/src/components/sidebar/view/subcomponents/SidebarModals.tsx
index 1a024c6..a102878 100644
--- a/src/components/sidebar/view/subcomponents/SidebarModals.tsx
+++ b/src/components/sidebar/view/subcomponents/SidebarModals.tsx
@@ -8,6 +8,7 @@ import Settings from '../../../settings/view/Settings';
 import VersionUpgradeModal from '../modals/VersionUpgradeModal';
 import type { Project } from '../../../../types/app';
 import type { ReleaseInfo } from '../../../../types/sharedTypes';
+import type { InstallMode } from '../../../../hooks/useVersionCheck';
 import { normalizeProjectForSettings } from '../../utils/utils';
 import type { DeleteProjectConfirmation, SessionDeleteConfirmation, SettingsProject } from '../../types/types';
 
@@ -30,6 +31,7 @@ type SidebarModalsProps = {
   releaseInfo: ReleaseInfo | null;
   currentVersion: string;
   latestVersion: string | null;
+  installMode: InstallMode;
   t: TFunction;
 };
 
@@ -65,6 +67,7 @@ export default function SidebarModals({
   releaseInfo,
   currentVersion,
   latestVersion,
+  installMode,
   t,
 }: SidebarModalsProps) {
   // Settings expects project identity/path fields to be present for dropdown labels and local-scope MCP config.
@@ -199,6 +202,7 @@ export default function SidebarModals({
         releaseInfo={releaseInfo}
         currentVersion={currentVersion}
         latestVersion={latestVersion}
+        installMode={installMode}
       />
     </>
   );
diff --git a/src/hooks/useVersionCheck.ts b/src/hooks/useVersionCheck.ts
index 9ce8e92..ba3a894 100644
--- a/src/hooks/useVersionCheck.ts
+++ b/src/hooks/useVersionCheck.ts
@@ -21,10 +21,28 @@ const compareVersions = (v1: string, v2: string) => {
   return 0;
 };
 
+export type InstallMode = 'git' | 'npm';
+
 export const useVersionCheck = (owner: string, repo: string) => {
   const [updateAvailable, setUpdateAvailable] = useState(false);
   const [latestVersion, setLatestVersion] = useState<string | null>(null);
   const [releaseInfo, setReleaseInfo] = useState<ReleaseInfo | null>(null);
+  const [installMode, setInstallMode] = useState<InstallMode>('git');
+
+  useEffect(() => {
+    const fetchInstallMode = async () => {
+      try {
+        const response = await fetch('/health');
+        const data = await response.json();
+        if (data.installMode === 'npm' || data.installMode === 'git') {
+          setInstallMode(data.installMode);
+        }
+      } catch {
+        // Default to git on error
+      }
+    };
+    fetchInstallMode();
+  }, []);
 
   useEffect(() => {
     const checkVersion = async () => {
@@ -66,5 +84,5 @@ export const useVersionCheck = (owner: string, repo: string) => {
     return () => clearInterval(interval);
   }, [owner, repo]);
 
-  return { updateAvailable, latestVersion, currentVersion: version, releaseInfo };
+  return { updateAvailable, latestVersion, currentVersion: version, releaseInfo, installMode };
 }; 
\ No newline at end of file
diff --git a/src/i18n/locales/en/common.json b/src/i18n/locales/en/common.json
index 18f2b80..ac64eda 100644
--- a/src/i18n/locales/en/common.json
+++ b/src/i18n/locales/en/common.json
@@ -200,6 +200,7 @@
     "viewFullRelease": "View full release",
     "updateProgress": "Update Progress:",
     "manualUpgrade": "Manual upgrade:",
+    "npmUpgradeCommand": "npm install -g @siteboon/claude-code-ui@latest",
     "manualUpgradeHint": "Or click \"Update Now\" to run the update automatically.",
     "updateCompleted": "Update completed successfully!",
     "restartServer": "Please restart the server to apply changes.",
diff --git a/src/i18n/locales/ja/common.json b/src/i18n/locales/ja/common.json
index 7a101eb..10d991d 100644
--- a/src/i18n/locales/ja/common.json
+++ b/src/i18n/locales/ja/common.json
@@ -200,6 +200,7 @@
     "viewFullRelease": "リリース全文を見る",
     "updateProgress": "アップデートの進捗:",
     "manualUpgrade": "手動アップグレード:",
+    "npmUpgradeCommand": "npm install -g @siteboon/claude-code-ui@latest",
     "manualUpgradeHint": "または「今すぐ更新」をクリックして自動的にアップデートを実行できます。",
     "updateCompleted": "アップデートが完了しました！",
     "restartServer": "変更を適用するにはサーバーを再起動してください。",
diff --git a/src/i18n/locales/ko/common.json b/src/i18n/locales/ko/common.json
index 01b2461..d3e95ac 100644
--- a/src/i18n/locales/ko/common.json
+++ b/src/i18n/locales/ko/common.json
@@ -200,6 +200,7 @@
     "viewFullRelease": "전체 릴리스 보기",
     "updateProgress": "업데이트 진행 상황:",
     "manualUpgrade": "수동 업그레이드:",
+    "npmUpgradeCommand": "npm install -g @siteboon/claude-code-ui@latest",
     "manualUpgradeHint": "또는 \"지금 업데이트\"를 클릭하여 자동으로 업데이트합니다.",
     "updateCompleted": "업데이트가 완료되었습니다!",
     "restartServer": "변경사항을 적용하려면 서버를 재시작하세요.",
diff --git a/src/i18n/locales/zh-CN/common.json b/src/i18n/locales/zh-CN/common.json
index c5db190..f02127e 100644
--- a/src/i18n/locales/zh-CN/common.json
+++ b/src/i18n/locales/zh-CN/common.json
@@ -200,6 +200,7 @@
     "viewFullRelease": "查看完整发布",
     "updateProgress": "更新进度：",
     "manualUpgrade": "手动升级：",
+    "npmUpgradeCommand": "npm install -g @siteboon/claude-code-ui@latest",
     "manualUpgradeHint": "或点击'立即更新'以自动运行更新。",
     "updateCompleted": "更新成功完成！",
     "restartServer": "请重启服务器以应用更改。",