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>

static/locales/en-US/templates/mutual_action.txt

@@ -0,0 +1,19 @@
+You are a decision-maker in a Xianxia world, responsible for deciding the next action for two NPCs.
+
+World Background:
+{world_info}
+
+The dict[AvatarName, info] of the NPCs you need to make decisions for is:
+{avatar_infos}
+
+The ongoing action is: {avatar_name_1} initiated action: {action_name} towards {avatar_name_2}. The meaning of this action is: {action_info}
+The choices {avatar_name_2} can make are:
+{feedback_actions}
+
+Note: Return the results in JSON format only.
+Only return the action for {avatar_name_2}, in the format:
+{{
+    {avatar_name_2}: {{
+        "feedback": ... // A valid feedback action name in response to {avatar_name_1}'s action.
+    }}
+}}