feat(i18n): 实现门诊增强和门诊财务国际化功能

- 在门诊增强页面添加表格列的国际化标签
- 在门诊增强页面添加操作按钮的国际化文本
- 在门诊财务日结结算页面实现表单字段的国际化
- 在门诊财务日结结算页面实现表格列标题的国际化
- 在门诊财务日结结算页面添加操作按钮的国际化
- 集成 vue-i18n 并在组件中使用国际化方法
- 更新日结详情提示消息为国际化文本
- 实现导出文件名和成功消息的国际化

md/specs/MULTILANGUAGE_I18N_DESIGN.md

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+# Multi-Language Internationalization (i18n) Design Specification
+
+> **Date:** 2026-06-24
+> **Status:** Approved
+> **Scope:** Backend (Spring), Frontend (Vue 3), Miniapp, Database Dictionaries
+
+---
+
+## [S1] Backend i18n
+
+### Current State
+- Spring MessageSource configured at I18nConfig with SessionLocaleResolver
+- Param name: lang
+- Existing: messages.properties (fallback), messages_zh_CN.properties (56 keys)
+- Miniapp: messages.properties (46 keys)
+
+### Design
+- Create messages_en_US.properties and messages_vi_VN.properties in both main app and miniapp
+- Translate all 56+ keys per language
+- No code changes needed Spring already supports this via MessageUtils.message(key, args)
+
+---
+
+## [S2] Database Dictionary Multi-Language
+
+### Current State
+- sys_dict_data table with fields: dictCode, dictSort, dictLabel, dictValue, dictType, cssClass, listClass, isDefault, status, pyStr
+- 124+ Java files reference SysDictData and DictUtils
+
+### Design
+- Flyway migration: ADD COLUMN dict_value_en VARCHAR(200), dict_value_vi VARCHAR(200)
+- Entity: Add dictValueEn, dictValueVi fields to SysDictData.java
+- Service: Update DictUtils.getDictLabel() to return locale-aware label
+- Query fallback: if target language field is null use dictLabel (Chinese)
+- Management UI: Add en/vi input fields to dict data edit dialog
+
+---
+
+## [S3] Frontend i18n
+
+### Current State
+- 724 Vue files with hardcoded Chinese text
+- Element Plus hardcoded to zhCn in main.js:120
+- No vue-i18n dependency
+- No i18n directory structure
+
+### Design
+- Install vue-i18n@latest (v11, Composition API mode)
+- Directory: src/i18n/ with index.js + locales/{zhCN,enUS,viVN}.json
+- Language switching: Cookie + localStorage + user preference
+- Component: LanguageSwitcher dropdown in navbar
+- Element Plus: Dynamic locale switching via ElLocale.use()
+- VXE Table: Dynamic locale via VxeUI.setLang()
+- Extraction: Node.js script to scan all .vue/.js for Chinese text
+- Migration: Module-by-module replacement of hardcoded Chinese with $t(key)
+
+### JSON Structure
+nav.*        Navigation menu labels
+common.*     Buttons, labels, messages (shared)
+login.*      Login page
+dict.*       Dictionary values (gender, status, etc.)
+module.*     Business module specific (registration, pharmacy, etc.)
+
+---
+
+## [S4] Dictionary Management UI
+
+- Add multilanguage tab to src/views/system/dict/data.vue
+- Input fields for dict_value_en and dict_value_vi
+- Save to backend via existing dict update API extended with new fields
+
+---
+
+## [S5] Testing
+
+### Backend
+- mvn clean compile -DskipTests BUILD SUCCESS
+- mvn test all tests pass
+- API test: curl -H Accept-Language: en returns English messages
+
+### Frontend
+- npm run build:dev BUILD SUCCESS
+- npm run lint no errors
+- Manual: Switch language all UI text changes refresh persists
+
+---
+
+## Execution Preference
+
+execution-style: subagent Each task executed by a fresh subagent.