feat: i18n system, lang switch component, english subtitles, UI improvements, roadmap update

src/locales/zh.json

@@ -0,0 +1,79 @@
+{
+  "ui": {
+    "start": "开始游戏",
+    "resume": "继续上次进度",
+    "chapters": "章节选择",
+    "menu": "菜单",
+    "save": "保存",
+    "load": "读取",
+    "close": "关闭",
+    "skip": "跳过",
+    "fullscreen": "全屏",
+    "exitFullscreen": "退出全屏",
+    "gameEnd": "游戏结束",
+    "choose": "做出你的选择",
+    "back": "返回",
+    "autoSave": "自动存档",
+    "empty": "空",
+    "loading": "加载中...",
+    "speed": "倍速",
+    "noAutoSave": "暂无自动存档",
+    "autoSaveHint": "游戏会在每次场景切换时自动保存到槽位 0"
+  },
+  "scene": {
+    "intro": {
+      "choice": {
+        "left_door": "走向左边那扇发光的门",
+        "right_door": "走向右边那扇普通的门",
+        "search": "仔细搜索房间",
+        "stay": "留在原地，什么也不做"
+      }
+    },
+    "left_door": {
+      "choice": {
+        "handshake": "与陌生人握手",
+        "reject": "拒绝握手，保持警惕"
+      }
+    },
+    "right_door": {
+      "choice": {
+        "continue": "继续前进",
+        "back": "回头"
+      }
+    },
+    "trust_ending": {
+      "choice": {
+        "journey": "开启信任的旅程（需要 trust >= 80）",
+        "leave": "离开这里"
+      }
+    },
+    "investigation_site": {
+      "choice": {
+        "leave": "离开房间"
+      }
+    },
+    "desk_detail": {
+      "choice": {
+        "return": "返回调查现场",
+        "leave": "离开"
+      }
+    },
+    "stay": {
+      "choice": {
+        "stand": "站起来离开"
+      }
+    },
+    "qte_success": {
+      "choice": {
+        "continue": "继续前进",
+        "back": "回头"
+      }
+    },
+    "qte_fail": {
+      "choice": {
+        "continue": "继续前进",
+        "back": "回头"
+      }
+    }
+  }
+}