feat: enhance DND nesting & promotion, isolated tags API, fix completion bounce UI, add Admin i18n switcher, refine typography & polish UX (v0.7.2)

.cline-context.md

@@ -15,6 +15,11 @@
   - `src/middleware.ts`: Route-level auth and admin role verification guard.
 
 - **Completed So Far:**
+  - Standardized user-isolated Tag database REST API (`/api/tags`) ensuring private custom tags per account, preventing cross-user data leakage and providing live tag autocomplete (v0.7.2).
+  - Streamlined Task Drag-and-Drop (DND) interaction model: hovering over a task nests as a subtask, dropping on blank list background elevates to root level, and prevents duplicate/looping trees (v0.7.2).
+  - Fixed completed task toggle button layout shift and centered list loader animations (v0.7.2).
+  - Constrained inline title edit double-click trigger zone strictly to task title text span (v0.7.2).
+  - Integrated i18n localization with language switcher in Admin console (`/admin`), and upgraded placeholders/dialogs across EN/KO/JA to polite, natural phrasing (v0.7.2).
   - Standardized complete localization across all 3 supported languages (EN, KO, JA) without partial fallback leaks; translated all Settings Modal tabs (Profile, Preferences, Labs, Sync Integrations, Admin) and interactive guides (v0.7.1).
   - Resolved list header rename layout shift bug where editing list title pushed the completed items toggle button (v0.7.1).
   - Enhanced Markdown Note Editor preview/editor canvas alignment and unified description typography heights (v0.7.1).

AGENTS.md

@@ -85,7 +85,8 @@ src/
 | `checkpoint-v0.6.3` | 노션 스타일 6도트 드래그 핸들(`⋮⋮`) & DND 태스크 재정렬, F2 단축키 인라인 제목 수정, 우측 호버 서브태스크 추가 버튼, 6초 플로팅 인터랙티브 실행 취소(Undo) 토스트 배너 탑재, 휴지통 및 로컬 스토리지 트리 중복 버그 수정 | 2026-08-21 |
 | `checkpoint-v0.6.4` | i18n 모듈러 사전 아키텍처(`types.ts`, `locales/en.ts`, `locales/ko.ts`, `locales/ja.ts`) 분리 및 번역 완성도 100%, 어드민 콘솔(`/admin`) 데모 프리뷰 및 멀티유저 게이트 연동, 설정 모달 Admin 탭 정보 고도화, 사이드바 프로필 메뉴 내 Admin Console 진입점 추가 | 2026-08-21 |
 | `checkpoint-v0.7.0` | 좌측 사이드바 UI/UX 전면 리디자인(브랜드 로고 SVG, 중앙정렬 매트 검색창, 바닥 밀착 프로필), 뷰 전환(리스트/칸반) 미니멀 원터치 토글 및 실험실 연동 버그 수정, 휴지통 카운트 실시간 동기화 & 기본화면 튕김 버그 수정, 첫 가입 계정 자동 ADMIN 승격 및 실시간 Admin API(/api/admin/users, /api/admin/stats) 구축, 서브태스크 인라인 추가 및 체크박스 Optimistic UI 실시간 렌더링, 메모장 기본 Preview 모드 & 원터치 토글, N-depth 계층형 DND 드래그 앤 드롭 재정렬 및 재귀 하위 태스크 캐스케이드 삭제 지원 | 2026-08-21 |
-| `checkpoint-v0.7.1` | **(현재 최신)** 설정 모달(5개 탭 및 가이드/프리뷰 전면) i18n 3개국어(EN/KO/JA) 100% 완전 번역 및 언어 로컬스토리지 영구 기억/자동 감지 적용, 태스크 목록 제목 인라인 수정 시 완료항목 토글 버튼 밀림 flexbox 레이아웃 버그 수정, 메모장 프리뷰/에디터 높이 및 플레이스홀더 타이포그래피 일관성 보정, 우측 상세 패널 우선순위 브라우저 기본 드롭다운을 중앙 퀵애드와 동일한 세련된 컬러 팝오버 칩 UI로 통일 | 2026-08-22 |
+| `checkpoint-v0.7.1` | 설정 모달(5개 탭 및 가이드/프리뷰 전면) i18n 3개국어(EN/KO/JA) 100% 완전 번역 및 언어 로컬스토리지 영구 기억/자동 감지 적용, 태스크 목록 제목 인라인 수정 시 완료항목 토글 버튼 밀림 flexbox 레이아웃 버그 수정, 메모장 프리뷰/에디터 높이 및 플레이스홀더 타이포그래피 일관성 보정, 우측 상세 패널 우선순위 브라우저 기본 드롭다운을 중앙 퀵애드와 동일한 세련된 컬러 팝오버 칩 UI로 통일 | 2026-08-22 |
+| `checkpoint-v0.7.2` | **(현재 최신)** 태그(Tag) 사용자 계정별 데이터베이스 격리 API 구축(/api/tags), DND 드래그앤드롭 상위 태스크 하위 편입 단일화 및 빈 배경 드롭 1단계 승격 지원, 완료항목 토글 시 로딩 UI 밀림 버그 수정, 인라인 제목 수정 더블클릭 영역 텍스트 한정, 어드민 콘솔 다국어(i18n) 언어 선택기 지원, 친절하고 간결한 톤앤매너 플레이스홀더 전면 적용 | 2026-08-22 |
 
 ---
 

src/app/admin/page.tsx

@@ -4,6 +4,7 @@ import Link from "next/link";
 import { useSession } from "next-auth/react";
 import { getDemoStore } from "@/lib/mockData";
 import { useI18n } from "@/lib/i18n";
+import { LanguageSelector } from "@/components/ui/LanguageSelector";
 
 interface AdminUser {
   id: string;
@@ -47,7 +48,7 @@ const INITIAL_DEMO_USERS: AdminUser[] = [
 
 export default function AdminPage() {
   const { data: session, status } = useSession();
-  const { t } = useI18n();
+  const { t, lang } = useI18n();
 
   const isDemo = status === "unauthenticated" || !session;
 
@@ -232,18 +233,19 @@ export default function AdminPage() {
           </div>
         </div>
 
-        <div style={{ display: "flex", gap: 8 }}>
+        <div style={{ display: "flex", alignItems: "center", gap: 8 }}>
+          <LanguageSelector />
           {isDemo ? (
             <Link href="/demo" className="btn btn-ghost btn-sm">
-              ← Back to Demo
+              ← {lang === "ko" ? "데모로 돌아가기" : lang === "ja" ? "デモに戻る" : "Back to Demo"}
             </Link>
           ) : (
             <button type="button" className="btn btn-ghost btn-sm" onClick={fetchAdminData}>
-              🔄 Refresh Data
+              🔄 {lang === "ko" ? "새로고침" : lang === "ja" ? "更新" : "Refresh"}
             </button>
           )}
           <Link href="/" className="btn btn-primary btn-sm">
-            🚀 Open Dashboard
+            🚀 {lang === "ko" ? "할 일 대시보드" : lang === "ja" ? "タスク一覧" : "Open Dashboard"}
           </Link>
         </div>
       </div>

src/components/layout/AppShell.tsx

@@ -5,6 +5,7 @@ import { TaskList, Task, List, User } from "../tasks/TaskList";
 import { useUserPrefs, usePrefsStyle } from "@/lib/useUserPrefs";
 import { TaskDetail } from "../tasks/TaskDetail";
 import { CommandPalette } from "../ui/CommandPalette";
+import { useI18n } from "@/lib/i18n";
 import {
   getDemoStore,
   saveDemoStore,
@@ -58,6 +59,7 @@ export function AppShell({ user, isDemo = false }: AppShellProps) {
   const [showCompleted, setShowCompleted] = useState(false);
   const [cmdPaletteOpen, setCmdPaletteOpen] = useState(false);
   const [refreshKey, setRefreshKey] = useState(0);
+  const { t } = useI18n();
 
   // Global user preferences (reactive)
   const { prefs, updatePrefs } = useUserPrefs();
@@ -677,12 +679,12 @@ export function AppShell({ user, isDemo = false }: AppShellProps) {
           <div className="undo-toast-content">
             <span className="undo-toast-icon">🗑️</span>
             <span className="undo-toast-msg">
-              <strong>{undoToast.title || "할 일"}</strong>이(가) 삭제되었습니다.
+              <strong>{undoToast.title || t("tasks")}</strong> {t("taskUndoHint")}
             </span>
           </div>
           <div className="undo-toast-actions">
             <button type="button" className="undo-toast-btn" onClick={handleUndoDelete}>
-              실행 취소
+              {t("undoDelete")}
             </button>
             <button
               type="button"

src/components/tasks/KanbanView.tsx

@@ -101,6 +101,27 @@ export function KanbanView({
                 </span>
               )}
 
+              {task.tags && task.tags.length > 0 && task.tags.map((tg) => {
+                const tagName = typeof tg === "string" ? tg : tg.tag?.name;
+                const tagKey = typeof tg === "string" ? tg : tg.tag?.id || tg.tag?.name;
+                if (!tagName) return null;
+                return (
+                  <span
+                    key={tagKey}
+                    style={{
+                      fontSize: 10,
+                      fontWeight: 600,
+                      padding: "2px 6px",
+                      borderRadius: "var(--radius-sm)",
+                      background: "rgba(59, 130, 246, 0.12)",
+                      color: "#3B82F6",
+                    }}
+                  >
+                    #{tagName}
+                  </span>
+                );
+              })}
+
               {subtaskCount > 0 && (
                 <span
                   style={{

src/components/tasks/TaskDetail.tsx

@@ -40,12 +40,30 @@ export function TaskDetail({
   const [dueDate, setDueDate] = useState(task.dueDate ? task.dueDate.split("T")[0] : "");
   const [priority, setPriority] = useState(task.priority);
   const [tags, setTags] = useState<{ tag: Tag }[]>(task.tags || []);
-  const [allAvailableTags, setAllAvailableTags] = useState<MockTag[]>(() => (typeof window !== "undefined" ? getCustomTags() : []));
+  const [allAvailableTags, setAllAvailableTags] = useState<MockTag[]>(() => (isDemo && typeof window !== "undefined" ? getCustomTags() : []));
   const [showTagPicker, setShowTagPicker] = useState(false);
   const [showListPicker, setShowListPicker] = useState(false);
   const [showPriorityPicker, setShowPriorityPicker] = useState(false);
   const [newTagName, setNewTagName] = useState("");
 
+  // Load user's actual tags in non-demo mode
+  useEffect(() => {
+    if (isDemo) {
+      if (typeof window !== "undefined") {
+        setAllAvailableTags(getCustomTags());
+      }
+    } else {
+      fetch("/api/tags")
+        .then((res) => (res.ok ? res.json() : []))
+        .then((data) => {
+          if (Array.isArray(data)) {
+            setAllAvailableTags(data);
+          }
+        })
+        .catch((err) => console.error("Failed to fetch user tags", err));
+    }
+  }, [isDemo]);
+
   // Modular Blocks Customization via global prefs
   const { prefs, updatePrefs } = useUserPrefs();
   const blockOrder = prefs.detailBlockOrder;
@@ -244,22 +262,43 @@ export function TaskDetail({
     save(task.id, { tags: nextTags });
   };
 
-  const addCustomTag = () => {
+  const addCustomTag = async () => {
     const trimmed = newTagName.trim().replace(/^#/, "");
     if (!trimmed) return;
-    const newTag: MockTag = {
-      id: "tag-" + Date.now(),
-      name: trimmed,
-      color: ["#4B7BF5", "#10B981", "#EF4444", "#F59E0B", "#8B5CF6"][Math.floor(Math.random() * 5)],
-    };
-    const updatedAvailable = [...allAvailableTags, newTag];
-    setAllAvailableTags(updatedAvailable);
-    if (typeof window !== "undefined") {
-      const { saveCustomTags } = require("@/lib/mockData");
-      saveCustomTags(updatedAvailable);
+    const randomColor = ["#4B7BF5", "#10B981", "#EF4444", "#F59E0B", "#8B5CF6"][Math.floor(Math.random() * 5)];
+
+    if (isDemo) {
+      const newTag: MockTag = {
+        id: "tag-" + Date.now(),
+        name: trimmed,
+        color: randomColor,
+      };
+      const updatedAvailable = [...allAvailableTags, newTag];
+      setAllAvailableTags(updatedAvailable);
+      if (typeof window !== "undefined") {
+        const { saveCustomTags } = require("@/lib/mockData");
+        saveCustomTags(updatedAvailable);
+      }
+      toggleTag(newTag);
+      setNewTagName("");
+      return;
+    }
+
+    try {
+      const res = await fetch("/api/tags", {
+        method: "POST",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ name: trimmed, color: randomColor }),
+      });
+      if (res.ok) {
+        const createdTag = await res.json();
+        setAllAvailableTags((prev) => [...prev.filter((tItem) => tItem.id !== createdTag.id), createdTag]);
+        toggleTag(createdTag);
+        setNewTagName("");
+      }
+    } catch (err) {
+      console.error("Failed to create tag", err);
     }
-    toggleTag(newTag);
-    setNewTagName("");
   };
 
   const addSubtask = useCallback(async () => {

src/components/tasks/TaskList.tsx

@@ -44,7 +44,7 @@ interface TaskItemProps {
   isTrashMode?: boolean;
   onRestore?: (id: string) => void;
   onPermanentDelete?: (id: string) => void;
-  onDragTask?: (draggedId: string, targetId: string, position: "before" | "after" | "inside") => void;
+  onDragTask?: (draggedId: string, targetId: string, position: "before" | "after" | "inside" | "root") => void;
 }
 
 // Recursive Task Tree Item (Supports 1st, 2nd, 3rd, N-level sub-tasks seamlessly)
@@ -157,12 +157,12 @@ function RecursiveTaskItem({
     touchStartX.current = null;
   };
 
-  const [dragOverPos, setDragOverPos] = useState<"top" | "bottom" | "inside" | null>(null);
+  const [isDragOver, setIsDragOver] = useState(false);
 
   return (
     <div style={{ paddingLeft: depth > 0 ? 24 : 0, position: "relative" }}>
       <div
-        className={`task-item${task.completed ? " completed" : ""}${isSelected ? " selected" : ""}${dragOverPos ? ` drag-over-${dragOverPos}` : ""}`}
+        className={`task-item${task.completed ? " completed" : ""}${isSelected ? " selected" : ""}${isDragOver ? " drag-over-nested" : ""}`}
         onClick={() => onSelect(task)}
         tabIndex={0}
         onKeyDown={(e) => {
@@ -183,29 +183,25 @@ function RecursiveTaskItem({
         onDragOver={(e) => {
           if (isTrashMode) return;
           e.preventDefault();
+          e.stopPropagation();
           e.dataTransfer.dropEffect = "move";
-          const rect = e.currentTarget.getBoundingClientRect();
-          const relY = e.clientY - rect.top;
-          const h = rect.height;
-          if (relY < h * 0.25) {
-            setDragOverPos("top");
-          } else if (relY > h * 0.75) {
-            setDragOverPos("bottom");
-          } else {
-            setDragOverPos("inside");
-          }
+          if (!isDragOver) setIsDragOver(true);
+        }}
+        onDragLeave={(e) => {
+          e.preventDefault();
+          e.stopPropagation();
+          setIsDragOver(false);
         }}
-        onDragLeave={() => setDragOverPos(null)}
         onDrop={(e) => {
           if (isTrashMode) return;
           e.preventDefault();
+          e.stopPropagation();
+          setIsDragOver(false);
           const draggedId = e.dataTransfer.getData("text/plain");
           if (draggedId && draggedId !== task.id && onDragTask) {
-            const pos: "before" | "after" | "inside" =
-              dragOverPos === "top" ? "before" : dragOverPos === "bottom" ? "after" : "inside";
-            onDragTask(draggedId, task.id, pos);
+            // Unified interaction: drop on task to nest as subtask
+            onDragTask(draggedId, task.id, "inside");
           }
-          setDragOverPos(null);
         }}
         id={`task-${task.id}`}
         style={{
@@ -213,9 +209,9 @@ function RecursiveTaskItem({
           marginLeft: depth > 0 ? 8 : 0,
           transform: `translateX(${swipeOffset}px)`,
           transition: swipeOffset === 0 ? "transform 0.2s cubic-bezier(0.16, 1, 0.3, 1)" : "none",
-          outline: dragOverPos === "inside" ? "2px dashed var(--accent)" : undefined,
+          outline: isDragOver ? "2px dashed var(--accent)" : undefined,
           outlineOffset: -2,
-          background: dragOverPos === "inside" ? "var(--accent-light, rgba(75, 123, 245, 0.12))" : undefined,
+          background: isDragOver ? "var(--accent-light, rgba(75, 123, 245, 0.12))" : undefined,
         }}
       >
         {/* Notion-style 6-dot Drag Handle */}
@@ -307,17 +303,24 @@ function RecursiveTaskItem({
               style={{ padding: "2px 6px", fontSize: depth > 0 ? 13 : 14, fontWeight: 500, height: 26, width: "100%" }}
             />
           ) : (
-            <div
-              className="task-title"
-              onDoubleClick={(e) => {
-                if (isTrashMode) return;
-                e.stopPropagation();
-                setEditingTitle(true);
-              }}
-              title="Double click or press F2 to edit"
-              style={{ fontSize: depth > 0 ? 13 : 14, fontWeight: depth === 0 ? 600 : 500 }}
-            >
-              {task.title}
+            <div style={{ display: "inline-flex", alignItems: "center", maxWidth: "100%" }}>
+              <span
+                className="task-title"
+                onDoubleClick={(e) => {
+                  if (isTrashMode) return;
+                  e.stopPropagation();
+                  setEditingTitle(true);
+                }}
+                title="Double click or press F2 to edit"
+                style={{
+                  fontSize: depth > 0 ? 13 : 14,
+                  fontWeight: depth === 0 ? 600 : 500,
+                  cursor: "text",
+                  display: "inline-block",
+                }}
+              >
+                {task.title}
+              </span>
             </div>
           )}
 
@@ -804,9 +807,9 @@ export function TaskList({
   };
 
   // Robust Tree-aware reordering function (1st, 2nd, 3rd depth task reordering, promoting to top-level, and demoting into subtask)
-  const handleReorderTasks = useCallback((draggedId: string, targetId: string, position: "before" | "after" | "inside") => {
+  const handleReorderTasks = useCallback((draggedId: string, targetId: string, position: "before" | "after" | "inside" | "root") => {
     // Prevent dropping onto itself or into its own subtree (which causes loops/disappearing tasks)
-    if (draggedId === targetId) return;
+    if (draggedId === targetId && position !== "root") return;
 
     setTasks((prev) => {
       if (isDescendantNode(prev, draggedId, targetId)) {
@@ -837,6 +840,25 @@ export function TaskList({
 
       let determinedParentId: string | null = null;
 
+      if (position === "root") {
+        // Promote directly to top-level (1st depth root task)
+        determinedParentId = null;
+        const nodeAsRoot: Task = { ...safeExtractedNode, parentId: null };
+        const finalTree = [...treeWithoutDragged, nodeAsRoot];
+
+        if (isDemo && typeof window !== "undefined") {
+          const store = getDemoStore();
+          saveDemoStore(store.lists, finalTree as unknown as MockTask[]);
+        } else {
+          fetch(`/api/tasks/${draggedId}`, {
+            method: "PATCH",
+            headers: { "Content-Type": "application/json" },
+            body: JSON.stringify({ parentId: null }),
+          }).catch((err) => console.error("Failed to promote task to root", err));
+        }
+        return finalTree;
+      }
+
       // 2. Insert into the target position
       if (position === "inside") {
         determinedParentId = targetId;
@@ -1100,17 +1122,38 @@ export function TaskList({
           />
         </div>
       ) : (
-        /* Task list container */
+        /* Task list container with background drop support for promoting subtask to 1st depth */
         <div
           className="task-list-container"
+          onDragOver={(e) => {
+            if (e.target === e.currentTarget) {
+              e.preventDefault();
+              e.dataTransfer.dropEffect = "move";
+            }
+          }}
+          onDrop={(e) => {
+            if (e.target === e.currentTarget) {
+              e.preventDefault();
+              const draggedId = e.dataTransfer.getData("text/plain");
+              if (draggedId) {
+                // Promote to 1st depth root task
+                handleReorderTasks(draggedId, "", "root");
+              }
+            }
+          }}
           onContextMenu={(e) => {
             if (e.target === e.currentTarget) {
               e.preventDefault();
             }
           }}
         >
-          {loading && (
-            <div style={{ padding: "20px", textAlign: "center", color: "var(--text-tertiary)" }}>{t("loading")}</div>
+          {loading && tasks.length === 0 && (
+            <div style={{ flex: 1, display: "flex", alignItems: "center", justifyContent: "center", padding: "40px", color: "var(--text-tertiary)" }}>
+              <div style={{ display: "flex", flexDirection: "column", alignItems: "center", gap: 10 }}>
+                <div style={{ width: 24, height: 24, border: "2px solid var(--border)", borderTopColor: "var(--accent)", borderRadius: "50%", animation: "spin 0.8s linear infinite" }} />
+                <span style={{ fontSize: 13 }}>{t("loading")}</span>
+              </div>
+            </div>
           )}
           {!loading && tasks.length === 0 && (
             <div className="task-list-empty">

src/lib/i18n/locales/en.ts

@@ -155,16 +155,16 @@ export const en: TranslationDict = {
   hideDone: "Hide Done",
   showDone: "Show Done",
   completedSection: "Completed",
-  addTaskPlaceholder: "Add a task, press Enter...",
+  addTaskPlaceholder: "What would you like to accomplish?",
   add: "Add",
-  noTasksYet: "No tasks in this list yet",
+  noTasksYet: "No tasks in this list",
   selectListToStart: "Select a list to get started",
-  loading: "Loading...",
+  loading: "Loading tasks...",
   today: "Today",
   tomorrow: "Tomorrow",
 
   // Task Detail
-  taskTitlePlaceholder: "Task title...",
+  taskTitlePlaceholder: "Task title",
   priority: "Priority",
   priorityNone: "None",
   priorityLow: "Low",
@@ -173,10 +173,10 @@ export const en: TranslationDict = {
   dueDate: "Due date",
   clear: "Clear",
   notes: "Notes",
-  notesPlaceholder: "Add detailed notes, markdown supported...",
+  notesPlaceholder: "Add details, markdown supported...",
   subtasks: "Subtasks",
-  addSubtaskPlaceholder: "Add a subtask, press Enter...",
-  deleteTaskConfirm: "Are you sure you want to delete this task?",
+  addSubtaskPlaceholder: "Add a subtask...",
+  deleteTaskConfirm: "Delete this task?",
   autoSaved: "Saved",
   saving: "Saving...",
   created: "Created",

src/lib/i18n/locales/ja.ts

@@ -155,28 +155,28 @@ export const ja: TranslationDict = {
   hideDone: "完了項目を非表示",
   showDone: "完了項目を表示",
   completedSection: "完了済み",
-  addTaskPlaceholder: "新しいタスクを入力してEnter...",
+  addTaskPlaceholder: "新しいタスクを書き留めましょう",
   add: "追加",
   noTasksYet: "このリストにはタスクがありません",
-  selectListToStart: "リストを選択して始めましょう",
+  selectListToStart: "リストを選択して開始してください",
   loading: "読み込み中...",
   today: "今日",
   tomorrow: "明日",
 
   // Task Detail
-  taskTitlePlaceholder: "タスク名を入力...",
+  taskTitlePlaceholder: "タスク名",
   priority: "優先度",
   priorityNone: "なし",
   priorityLow: "低",
   priorityMedium: "中",
   priorityHigh: "高",
-  dueDate: "期日",
+  dueDate: "期限日",
   clear: "クリア",
   notes: "メモ",
-  notesPlaceholder: "詳細なメモを入力 (Markdown対応)...",
+  notesPlaceholder: "詳細を入力 (Markdown対応)...",
   subtasks: "サブタスク",
-  addSubtaskPlaceholder: "サブタスクを入力してEnter...",
-  deleteTaskConfirm: "このタスクを削除してもよろしいですか？",
+  addSubtaskPlaceholder: "サブタスクを追加...",
+  deleteTaskConfirm: "タスクを削除しますか？",
   autoSaved: "保存済み",
   saving: "保存中...",
   created: "作成日時",

src/lib/i18n/locales/ko.ts

@@ -155,7 +155,7 @@ export const ko: TranslationDict = {
   hideDone: "완료항목 숨기기",
   showDone: "완료항목 표시",
   completedSection: "완료됨",
-  addTaskPlaceholder: "새 할 일 입력 후 Enter...",
+  addTaskPlaceholder: "새로운 할 일을 적어볼까요?",
   add: "추가",
   noTasksYet: "이 목록에 등록된 할 일이 없습니다",
   selectListToStart: "시작할 목록을 선택하세요",
@@ -164,7 +164,7 @@ export const ko: TranslationDict = {
   tomorrow: "내일",
 
   // Task Detail
-  taskTitlePlaceholder: "작업 제목 입력...",
+  taskTitlePlaceholder: "할 일 제목",
   priority: "우선순위",
   priorityNone: "없음",
   priorityLow: "낮음",
@@ -175,8 +175,8 @@ export const ko: TranslationDict = {
   notes: "메모",
   notesPlaceholder: "상세 내용을 입력하세요 (마크다운 지원)...",
   subtasks: "하위작업",
-  addSubtaskPlaceholder: "하위작업 추가 후 Enter...",
-  deleteTaskConfirm: "이 작업을 정말 삭제하시겠습니까?",
+  addSubtaskPlaceholder: "하위 작업을 적어보세요...",
+  deleteTaskConfirm: "태스크를 삭제하시겠습니까?",
   autoSaved: "저장됨",
   saving: "저장 중...",
   created: "생성일",