feat: add username/password login, account settings, and changelog (#133) (#134)

- Add username/password login as additional auth mechanism alongside existing token
- First login must use token; password can be configured in Settings > Account
- Password login returns the existing static token (no auth middleware changes)
- Add account settings: setup, change password, change username, remove password
- Add logout button to sidebar footer
- Add version changelog popup (click version number in sidebar)
- Support all 8 locales (en, zh, de, es, fr, ja, ko, pt)
- Bump version to 0.4.3

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

packages/client/src/i18n/locales/en.ts

@@ -8,6 +8,32 @@ export default {
     tokenRequired: 'Please enter your access token',
     invalidToken: 'Invalid token',
     connectionFailed: 'Cannot connect to server',
+    passwordLogin: 'Password',
+    tokenLogin: 'Token',
+    usernamePlaceholder: 'Username',
+    passwordPlaceholder: 'Password',
+    credentialsRequired: 'Please enter username and password',
+    invalidCredentials: 'Invalid username or password',
+    passwordMismatch: 'Passwords do not match',
+    passwordTooShort: 'Password must be at least 6 characters',
+    setupSuccess: 'Password login configured successfully',
+    passwordChanged: 'Password changed successfully',
+    passwordRemoved: 'Password login removed',
+    setupPassword: 'Set Up Password Login',
+    changePassword: 'Change Password',
+    changeUsername: 'Change Username',
+    removePasswordLogin: 'Remove',
+    username: 'Username',
+    currentPassword: 'Current Password',
+    newPassword: 'New Password',
+    confirmPassword: 'Confirm Password',
+    newUsername: 'New Username',
+    usernameChanged: 'Username changed successfully',
+    usernameTooShort: 'Username must be at least 2 characters',
+    setupDescription: 'Set up a username and password for convenient login. The access token will continue to work as a backup.',
+    removeConfirm: 'Are you sure you want to remove password login? You will need to use the access token to log in.',
+    passwordLoginNotConfigured: 'Password login is not configured',
+    passwordLoginConfigured: 'Password login enabled ({username})',
   },
 
   // Common
@@ -69,6 +95,9 @@ export default {
     updating: 'Updating...',
     updateSuccess: 'Update complete, please restart the server',
     updateFailed: 'Update failed',
+    logout: 'Sign Out',
+    changelog: 'Changelog',
+    noChangelog: 'No changelog available',
   },
 
   // Chat
@@ -324,6 +353,7 @@ export default {
     saveFailed: 'Save failed',
     tabs: {
       display: 'Display',
+      account: 'Account',
       agent: 'Agent',
       memory: 'Memory',
       session: 'Session',
@@ -511,4 +541,18 @@ export default {
     cost: 'Cost',
     noData: 'No usage data',
   },
+
+  // Changelog
+  changelog: {
+    new_0_4_3_1: 'Add username/password login alongside token authentication',
+    new_0_4_3_2: 'Add account settings for managing credentials (setup, change password, change username)',
+    new_0_4_3_3: 'Add logout button to sidebar',
+    new_0_4_3_4: 'Add version changelog popup (click version number)',
+    new_0_4_2_1: 'Add token usage tracking, context display, and dynamic context length',
+    new_0_4_2_2: 'Add session search modal',
+    new_0_4_2_3: 'Restore group chat system with Socket.IO and SQLite persistence',
+    new_0_4_2_4: 'Add pinned sessions and live monitor in Chat page',
+    new_0_4_2_5: 'Fix builtin provider detection and model matching',
+    new_0_4_1_1: 'Fix auth bypass, SPA serving, and provider improvements',
+  },
 }