feat: complete i18n translation for remaining components

- Translate pages: Projects, ProjectHealthPage, ProjectSettings
- Translate components: TaskDetailModal, KanbanBoard, Comments,
  SubtaskList, CalendarView, BlockerDialog
- Add translation keys for tasks namespace: kanban, calendar,
  subtasks.error, comments.error, blockers (full translation)
- Add common.labels.task translation key
- Fix task creation: use original_estimate instead of time_estimate

Translation coverage:
- 10 locale files updated (zh-TW & en)
- 6 page/component files translated
- ~100 new translation keys added

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/public/locales/zh-TW/common.json

@@ -52,7 +52,8 @@
     "selectAssignee": "選擇負責人...",
     "searchUsers": "搜尋使用者...",
     "noUsersFound": "找不到使用者",
-    "typeToSearch": "輸入以搜尋使用者"
+    "typeToSearch": "輸入以搜尋使用者",
+    "task": "任務"
   },
   "messages": {
     "success": "操作成功",

frontend/public/locales/zh-TW/health.json

@@ -1,12 +1,29 @@
 {
-  "title": "專案健康度",
-  "subtitle": "監控專案的整體健康狀況",
+  "title": "專案健康度儀表板",
+  "subtitle": "監控所有專案的健康狀況與風險等級",
   "overall": {
     "title": "整體健康度",
     "healthy": "健康",
     "atRisk": "風險中",
     "critical": "危急"
   },
+  "summary": {
+    "totalProjects": "專案總數",
+    "healthy": "健康",
+    "atRisk": "風險中",
+    "critical": "危急",
+    "avgHealth": "平均健康度",
+    "withBlockers": "有阻擋問題",
+    "delayed": "延遲"
+  },
+  "sort": {
+    "label": "排序方式",
+    "riskHigh": "風險：高到低",
+    "riskLow": "風險：低到高",
+    "healthHigh": "健康度：高到低",
+    "healthLow": "健康度：低到高",
+    "name": "名稱：A 到 Z"
+  },
   "metrics": {
     "schedule": "進度",
     "budget": "預算",
@@ -34,15 +51,21 @@
     "high": "高風險",
     "medium": "中風險",
     "low": "低風險",
+    "critical": "危急",
     "mitigated": "已緩解"
   },
   "actions": {
     "viewDetails": "查看詳情",
     "exportReport": "匯出報告",
-    "setAlert": "設定警示"
+    "setAlert": "設定警示",
+    "retry": "重試"
   },
+  "projectCount": "{{count}} 個專案",
   "empty": {
-    "title": "沒有健康度資料",
-    "description": "專案需要更多資料才能顯示健康度指標"
+    "title": "沒有專案",
+    "description": "建立專案以開始追蹤健康狀態"
+  },
+  "error": {
+    "loadFailed": "載入專案健康度資料失敗，請重試。"
   }
 }

frontend/public/locales/zh-TW/projects.json

@@ -4,16 +4,26 @@
   "editProject": "編輯專案",
   "deleteProject": "刪除專案",
   "projectSettings": "專案設定",
+  "newProject": "新增專案",
   "fields": {
     "name": "名稱",
     "namePlaceholder": "輸入專案名稱",
+    "title": "專案標題",
+    "titlePlaceholder": "輸入專案標題",
     "description": "描述",
-    "descriptionPlaceholder": "輸入專案描述",
+    "descriptionPlaceholder": "輸入專案描述（選填）",
     "status": "狀態",
     "startDate": "開始日期",
     "endDate": "結束日期",
     "owner": "專案負責人",
-    "space": "工作空間"
+    "space": "工作空間",
+    "securityLevel": "安全等級"
+  },
+  "securityLevel": {
+    "label": "安全等級",
+    "public": "公開 - 所有使用者",
+    "department": "部門 - 僅同部門",
+    "confidential": "機密 - 僅負責人"
   },
   "status": {
     "planning": "規劃中",
@@ -37,10 +47,18 @@
     "overdue": "逾期",
     "progress": "整體進度"
   },
+  "card": {
+    "tasks": "{{count}} 個任務",
+    "owner": "負責人",
+    "noDescription": "沒有描述",
+    "unknown": "未知"
+  },
   "messages": {
     "created": "專案已建立",
     "updated": "專案已更新",
     "deleted": "專案已刪除",
+    "loadFailed": "載入專案失敗",
+    "createFailed": "建立專案失敗",
     "confirmDelete": "確定要刪除此專案嗎？此操作將刪除所有相關任務。"
   },
   "empty": {

frontend/public/locales/zh-TW/settings.json

@@ -1,6 +1,7 @@
 {
   "title": "設定",
   "projectSettings": "專案設定",
+  "backToTasks": "返回任務",
   "tabs": {
     "general": "一般",
     "members": "成員",
@@ -13,10 +14,13 @@
     "title": "一般設定",
     "projectName": "專案名稱",
     "description": "描述",
+    "noDescription": "沒有描述",
+    "securityLevel": "安全等級",
     "status": "狀態",
     "visibility": "可見性",
     "public": "公開",
-    "private": "私人"
+    "private": "私人",
+    "helpText": "如需編輯專案詳情，請聯繫專案負責人。"
   },
   "members": {
     "title": "成員管理",

frontend/public/locales/zh-TW/tasks.json

@@ -23,7 +23,8 @@
     "attachments": "附件",
     "comments": "留言",
     "watchers": "關注者",
-    "blockers": "阻擋項目"
+    "blockers": "阻擋項目",
+    "hours": "{{count}} 小時"
   },
   "status": {
     "todo": "待處理",
@@ -31,7 +32,11 @@
     "review": "審核中",
     "done": "已完成",
     "cancelled": "已取消",
-    "blocked": "被阻擋"
+    "blocked": "被阻擋",
+    "noStatus": "無狀態",
+    "unassigned": "未指派",
+    "noDueDate": "無截止日期",
+    "notEstimated": "未預估"
   },
   "priority": {
     "low": "低",
@@ -86,17 +91,32 @@
     "add": "新增子任務",
     "placeholder": "輸入子任務標題",
     "completed": "已完成 {{count}} / {{total}}",
-    "empty": "沒有子任務"
+    "count": "{{count}} 個子任務",
+    "empty": "沒有子任務",
+    "adding": "新增中...",
+    "error": {
+      "load": "載入子任務失敗",
+      "create": "建立子任務失敗"
+    }
   },
   "comments": {
     "title": "留言",
-    "add": "新增留言",
-    "placeholder": "輸入您的留言...",
+    "add": "發表留言",
+    "placeholder": "新增留言... 使用 @name 來提及某人",
     "edited": "已編輯",
     "delete": "刪除留言",
-    "confirmDelete": "確定要刪除此留言嗎？",
+    "confirmDelete": "確定要刪除此留言嗎？此操作無法復原。",
     "empty": "還沒有留言",
-    "reply": "回覆"
+    "reply": "回覆",
+    "mentioned": "提及",
+    "replyingTo": "回覆留言中",
+    "posting": "發送中...",
+    "error": {
+      "load": "載入留言失敗",
+      "post": "發表留言失敗",
+      "update": "更新留言失敗",
+      "delete": "刪除留言失敗"
+    }
   },
   "attachments": {
     "title": "附件",
@@ -113,7 +133,26 @@
     "blockedBy": "被以下任務阻擋",
     "blocking": "正在阻擋以下任務",
     "remove": "移除阻擋關係",
-    "empty": "沒有阻擋項目"
+    "empty": "沒有阻擋項目",
+    "taskBlocked": "任務被阻擋",
+    "markAsBlocked": "標記為阻擋",
+    "activeBlocker": "進行中的阻擋",
+    "reportedBy": "回報者",
+    "on": "於",
+    "resolutionNote": "解決說明",
+    "resolutionPlaceholder": "描述如何解決阻擋問題...",
+    "resolving": "解決中...",
+    "resolveBlocker": "解決阻擋",
+    "blockerReason": "阻擋原因",
+    "reasonPlaceholder": "描述阻擋此任務的原因...",
+    "history": "阻擋歷史",
+    "reported": "回報",
+    "resolved": "已解決",
+    "error": {
+      "load": "載入阻擋項目失敗",
+      "create": "建立阻擋項目失敗",
+      "resolve": "解決阻擋項目失敗"
+    }
   },
   "messages": {
     "created": "任務已建立",
@@ -126,6 +165,18 @@
     "attachmentUploaded": "附件已上傳",
     "confirmDelete": "確定要刪除此任務嗎？此操作無法復原。"
   },
+  "kanban": {
+    "dropHere": "將任務拖放至此"
+  },
+  "calendar": {
+    "allAssignees": "所有負責人",
+    "allPriorities": "所有優先順序",
+    "activeOnly": "僅進行中",
+    "completedOnly": "僅已完成",
+    "clearFilters": "清除篩選",
+    "overdue": "逾期",
+    "completed": "已完成"
+  },
   "empty": {
     "title": "沒有任務",
     "description": "目前沒有任務。建立您的第一個任務開始吧！",