fix(i18n): complete zh_TW locale coverage (#13792)

This updates the Traditional Chinese (`zh_TW`) locale coverage across
Chatwoot so the app no longer falls back to English for missing backend,
dashboard, widget, and survey strings.

## How to test

1. Start Chatwoot locally and switch the UI locale to Traditional
Chinese (`zh_TW`).
2. Walk through the main product areas: dashboard, settings, inbox
management, help center, automations, reports, widget, and survey flows.
3. Confirm the UI surfaces translated Traditional Chinese copy instead
of English fallbacks.
4. Spot-check newly added locale surfaces such as secure password
messaging and snooze UI copy.

---------

Co-authored-by: Sojan Jose <sojan@pepalo.com>

app/javascript/widget/i18n/locale/zh_TW.json

@@ -14,50 +14,50 @@
   },
   "THUMBNAIL": {
     "AUTHOR": {
-      "NOT_AVAILABLE": "Not available"
+      "NOT_AVAILABLE": "不可用"
     }
   },
   "TEAM_AVAILABILITY": {
     "ONLINE": "我們在線上",
     "OFFLINE": "我們目前不在線上",
-    "BACK_AS_SOON_AS_POSSIBLE": "We will be back as soon as possible"
+    "BACK_AS_SOON_AS_POSSIBLE": "我們會盡快回來"
   },
   "REPLY_TIME": {
     "IN_A_FEW_MINUTES": "通常在幾分鐘內回覆",
     "IN_A_FEW_HOURS": "通常在幾小時內回覆",
     "IN_A_DAY": "通常在一天內回覆",
-    "BACK_IN_HOURS": "We will be back online in {n} hour | We will be back online in {n} hours",
-    "BACK_IN_MINUTES": "We will be back online in {time} minutes",
-    "BACK_AT_TIME": "We will be back online at {time}",
-    "BACK_ON_DAY": "We will be back online on {day}",
-    "BACK_TOMORROW": "We will be back online tomorrow",
-    "BACK_IN_SOME_TIME": "We will be back online in some time"
+    "BACK_IN_HOURS": "我們將在 {n} 小時後恢復在線 | 我們將在 {n} 小時後恢復在線",
+    "BACK_IN_MINUTES": "我們將在 {time} 分鐘後恢復在線",
+    "BACK_AT_TIME": "我們將在 {time} 恢復在線",
+    "BACK_ON_DAY": "我們將在 {day} 恢復在線",
+    "BACK_TOMORROW": "我們將於明天恢復在線",
+    "BACK_IN_SOME_TIME": "我們將在一段時間後恢復在線"
   },
   "DAY_NAMES": {
     "SUNDAY": "星期日",
     "MONDAY": "星期一",
-    "TUESDAY": "Tuesday",
-    "WEDNESDAY": "Wednesday",
-    "THURSDAY": "Thursday",
-    "FRIDAY": "Friday",
-    "SATURDAY": "Saturday"
+    "TUESDAY": "週二",
+    "WEDNESDAY": "週三",
+    "THURSDAY": "週四",
+    "FRIDAY": "週五",
+    "SATURDAY": "週六"
   },
   "START_CONVERSATION": "開始對話",
   "END_CONVERSATION": "結束對話",
   "CONTINUE_CONVERSATION": "繼續對話",
-  "YOU": "You",
+  "YOU": "您",
   "START_NEW_CONVERSATION": "開始一個新對話",
-  "VIEW_UNREAD_MESSAGES": "You have unread messages",
+  "VIEW_UNREAD_MESSAGES": "您有未讀訊息",
   "UNREAD_VIEW": {
     "VIEW_MESSAGES_BUTTON": "查看新訊息",
     "CLOSE_MESSAGES_BUTTON": "關閉",
-    "COMPANY_FROM": "from",
+    "COMPANY_FROM": "發自",
     "BOT": "機器人"
   },
   "BUBBLE": {
     "LABEL": "與我們對話"
   },
-  "POWERED_BY": "Powered by Chatwoot",
+  "POWERED_BY": "由 Chatwoot 支援",
   "EMAIL_PLACEHOLDER": "請輸入您的電子信箱",
   "CHAT_PLACEHOLDER": "輸入你的訊息",
   "TODAY": "今天",
@@ -79,10 +79,10 @@
         "LABEL": "聯絡人電話",
         "PLACEHOLDER": "請輸入您的電話號碼",
         "REQUIRED_ERROR": "電話號碼為必填",
-        "DIAL_CODE_VALID_ERROR": "Please select a country code",
-        "VALID_ERROR": "Please enter a valid phone number",
-        "DROPDOWN_EMPTY": "No results found",
-        "DROPDOWN_SEARCH": "Search country"
+        "DIAL_CODE_VALID_ERROR": "請選擇國家程式碼",
+        "VALID_ERROR": "請輸入一個有效的電話號碼",
+        "DROPDOWN_EMPTY": "沒有檢索到相關資訊",
+        "DROPDOWN_SEARCH": "搜尋國家/地區"
       },
       "MESSAGE": {
         "LABEL": "訊息",
@@ -92,7 +92,7 @@
     },
     "CAMPAIGN_HEADER": "在開始對話之前請提供您的名字及電郵",
     "IS_REQUIRED": "必填",
-    "REQUIRED": "Required",
+    "REQUIRED": "必填項",
     "REGEX_ERROR": "請輸入有效的字符"
   },
   "FILE_SIZE_LIMIT": "{MAXIMUM_FILE_UPLOAD_SIZE} 已超出檔案大小限制",