Feat/i18n (#92)

* feat: add vue-i18n

* feat: add vue-i18n

* feat: add vue-i18n

* feat: add language class

* add: en templates and configs

* add: en names

* refactor: name gender id and sect id

* feat(i18n): add gettext infrastructure for dynamic text translation (#81)

* feat(i18n): add gettext infrastructure for dynamic text translation

- Add src/i18n/ module with t() translation function
- Add .po/.mo files for zh_CN and en_US locales
- Update LanguageManager to reload translations on language change
- Add comprehensive tests (14 tests, all passing)
- Add implementation spec at docs/specs/i18n-dynamic-text.md

Phase 1 of i18n dynamic text implementation.

* feat(i18n): expand .po files with comprehensive translation entries

Add translation messages for:
- Battle result messages (fatal/non-fatal outcomes)
- Fortune event messages (item discovery, cultivation gains)
- Misfortune event messages (losses, damage, regression)
- Death reason messages
- Item exchange messages (equip, sell, discard)
- Single choice context and option labels
- Common labels (weapon, auxiliary, technique, elixir)

Both zh_CN and en_US locales updated with matching entries.

* test: add .po file integrity tests

* feat: i18n for actions

* feat: i18n for effects

* feat: i18n for gathering

* feat: i18n for classes

* feat: i18n for classes

* feat: i18n for classes

* feat: i18n for classes

* fix bugs

* fix bugs

* fix bugs

* fix bugs

* fix bugs

* fix bugs

* fix bugs

* fix bugs

* update csv

* update world info

* update prompt

* update prompt

* fix bug

* fix bug

* fix bug

* fix bug

* fix bug

* fix bug

* fix bug

* fix bug

* fix bug

* update

* update

* update

* update

* update

* update

* update

---------

Co-authored-by: Zihao Xu <xzhseh@gmail.com>

src/classes/language.py

@@ -0,0 +1,43 @@
+from enum import Enum
+
+class LanguageType(Enum):
+    ZH_CN = "zh-CN"
+    EN_US = "en-US"
+
+class LanguageManager:
+    def __init__(self):
+        self._current = LanguageType.ZH_CN
+
+    @property
+    def current(self) -> LanguageType:
+        return self._current
+
+    def set_language(self, lang_code: str):
+        try:
+            # 尝试直接通过值匹配.
+            self._current = LanguageType(lang_code)
+        except ValueError:
+            # 如果匹配失败，默认为 zh-CN.
+            self._current = LanguageType.ZH_CN
+        
+        # Reload i18n translations when language changes.
+        from src.i18n import reload_translations
+        reload_translations()
+
+        # Update paths and reload game configs
+        from src.utils.config import update_paths_for_language
+        update_paths_for_language(self._current.value)
+
+        try:
+            from src.utils.df import reload_game_configs
+            reload_game_configs()
+        except ImportError:
+            # Prevent circular import crash during initialization
+            pass
+
+
+    def __str__(self):
+        return self._current.value
+
+# 全局单例
+language_manager = LanguageManager()