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/views/hermes/SettingsView.vue

@@ -13,6 +13,7 @@ import MemorySettings from "@/components/hermes/settings/MemorySettings.vue";
 import SessionSettings from "@/components/hermes/settings/SessionSettings.vue";
 import PrivacySettings from "@/components/hermes/settings/PrivacySettings.vue";
 import ModelSettings from "@/components/hermes/settings/ModelSettings.vue";
+import AccountSettings from "@/components/hermes/settings/AccountSettings.vue";
 
 const settingsStore = useSettingsStore();
 const { t } = useI18n();
@@ -35,6 +36,9 @@ onMounted(() => {
         :description="t('common.loading')"
       >
         <NTabs type="line" animated>
+          <NTabPane name="account" :tab="t('settings.tabs.account')">
+            <AccountSettings />
+          </NTabPane>
           <NTabPane name="display" :tab="t('settings.tabs.display')">
             <DisplaySettings />
           </NTabPane>