fix: 修复新 UI 语言与文案显示问题 (#4876)

* chore(dev): add local setup state reset target

- add a reset-setup make target to clear setup records, root users, and related options.
- support both docker dev PostgreSQL and local SQLite development databases.
- restart the docker dev backend so setup status is recalculated after reset.

* fix(chat): prevent preset menu text overflow

- add truncation layout for chat preset names to keep long labels inside the sidebar menu.
- prevent loading and external-link icons from shrinking in constrained menu rows.

* fix(i18n): translate dashboard granularity options

- call t() for granularity option labels in dashboard system settings.
- keep localized text consistent between the select trigger and dropdown items.

* chore(dev): add backend dev service rebuild target

- add a dev-api-rebuild make target to rebuild and start the docker backend service.
- reuse DEV_COMPOSE_FILE and DEV_BACKEND_SERVICE variables to avoid repeated compose config literals.

* fix(i18n): align interface language option labels

- add shared interface language options to keep display names consistent.
- reuse the shared options in the header switcher and profile preferences.
- normalize language codes so zh-CN and zh_CN resolve to Simplified Chinese.

* fix(i18n): add missing frontend translation keys

- route channel key prompts, form validation messages, and channel fallback text through i18n.
- add missing translations across six locales for channels, rankings, billing, and logs.
- update i18n sync reports so literal t() keys are present in the base locale.

web/default/src/i18n/languages.ts

@@ -0,0 +1,41 @@
+/*
+Copyright (C) 2023-2026 QuantumNous
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+For commercial licensing, please contact support@quantumnous.com
+*/
+
+export const INTERFACE_LANGUAGE_OPTIONS = [
+  { code: 'zh', label: '简体中文' },
+  { code: 'en', label: 'English' },
+  { code: 'fr', label: 'Français' },
+  { code: 'ru', label: 'Русский' },
+  { code: 'ja', label: '日本語' },
+  { code: 'vi', label: 'Tiếng Việt' },
+] as const
+
+export type InterfaceLanguageCode =
+  (typeof INTERFACE_LANGUAGE_OPTIONS)[number]['code']
+
+export function normalizeInterfaceLanguage(value?: string | null): string {
+  if (!value) return 'en'
+
+  const normalized = value.trim().replace(/_/g, '-').toLowerCase()
+  if (normalized.startsWith('zh')) return 'zh'
+
+  return INTERFACE_LANGUAGE_OPTIONS.some((lang) => lang.code === normalized)
+    ? normalized
+    : 'en'
+}