feat: showDate toggle on card via task modal checkbox

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/prisma/schema.prisma

@@ -52,6 +52,7 @@ model Task {
   issueNote   String?
   startDate   DateTime?
   dueDate     DateTime?
+  showDate    Boolean   @default(true)
   creatorId   String
   assigneeId  String?
   createdAt   DateTime   @default(now())

frontend/src/components/common/TaskModal.tsx

@@ -23,6 +23,7 @@ export interface TaskFormData {
   quarter: string;
   startDate: string;
   dueDate: string;
+  showDate: boolean;
 }
 
 interface TaskModalProps {
@@ -53,6 +54,7 @@ export function TaskModal({ mode, task, defaultSection = 'HR', defaultQuarter =
     quarter:     task?.quarter ?? defaultQuarter,
     startDate:   toDateInput(task?.startDate),
     dueDate:     toDateInput(task?.dueDate),
+    showDate:    task?.showDate ?? true,
   });
 
   const set = <K extends keyof TaskFormData>(field: K, value: TaskFormData[K]) =>
@@ -201,18 +203,26 @@ export function TaskModal({ mode, task, defaultSection = 'HR', defaultQuarter =
           </div>
 
           {/* 프로젝트 기간 */}
-          <div className="grid grid-cols-2 gap-3">
-            <div>
-              <label className="block text-sm font-bold text-gray-500 mb-1.5">시작일</label>
+          <div>
+            <div className="flex items-center justify-between mb-1.5">
+              <label className="text-sm font-bold text-gray-500">기간</label>
+              <label className="flex items-center gap-1.5 cursor-pointer select-none">
+                <input
+                  type="checkbox"
+                  checked={form.showDate}
+                  onChange={(e) => set('showDate', e.target.checked)}
+                  className="w-4 h-4 accent-blue-500 cursor-pointer"
+                />
+                <span className="text-sm font-semibold text-gray-500">카드에 기간 표시</span>
+              </label>
+            </div>
+            <div className="grid grid-cols-2 gap-3">
               <input
                 type="date"
                 value={form.startDate}
                 onChange={(e) => set('startDate', e.target.value)}
                 className="w-full border border-gray-200 rounded-xl px-4 py-2.5 outline-none focus:border-blue-400 focus:ring-2 focus:ring-blue-100 transition"
               />
-            </div>
-            <div>
-              <label className="block text-sm font-bold text-gray-500 mb-1.5">종료일</label>
               <input
                 type="date"
                 value={form.dueDate}

frontend/src/components/dashboard/DepartmentColumn.tsx

@@ -202,6 +202,7 @@ export function DepartmentColumn({ title: initialTitle, titleEn, subtitle: initi
       issueNote:   data.issueNote || null,
       startDate:   data.startDate || null,
       dueDate:     data.dueDate || null,
+      showDate:    data.showDate,
       quarter:     data.quarter,
       priority:    'MEDIUM',
       creatorId:   'system',

frontend/src/components/dashboard/TaskCard.tsx

@@ -125,6 +125,7 @@ export function TaskCard({
       issueNote:   data.issueNote || null,
       startDate:   data.startDate || null,
       dueDate:     data.dueDate || null,
+      showDate:    data.showDate,
       quarter:     data.quarter,
       priority:    'MEDIUM',
       creatorId:   'system',
@@ -144,6 +145,7 @@ export function TaskCard({
       issueNote:   data.issueNote || null,
       startDate:   data.startDate || null,
       dueDate:     data.dueDate || null,
+      showDate:    data.showDate,
     });
     setModalMode(null);
   };
@@ -192,7 +194,7 @@ export function TaskCard({
         {/* ── 기간 + 상태 ── */}
         <div className="mt-1 flex items-center gap-2">
           <span className="text-sm text-gray-400 font-medium flex-1 truncate">
-            {(task.startDate || task.dueDate)
+            {task.showDate && (task.startDate || task.dueDate)
               ? `${task.startDate ? fmtDate(task.startDate) : '?'} ~ ${task.dueDate ? fmtDate(task.dueDate) : '?'}`
               : ''}
           </span>

frontend/src/components/dashboard/TaskManager.tsx

@@ -59,6 +59,7 @@ export function TaskManager({ tasks, sectionOptions, quarter, onClose }: TaskMan
       taskType: data.taskType || null, status: data.status, progress: data.progress,
       description: data.description || null, issueNote: data.issueNote || null,
       startDate: data.startDate || null, dueDate: data.dueDate || null,
+      showDate: data.showDate,
       quarter: data.quarter, priority: 'MEDIUM', creatorId: 'system',
     });
     setModalMode(null);
@@ -73,6 +74,7 @@ export function TaskManager({ tasks, sectionOptions, quarter, onClose }: TaskMan
         taskType: data.taskType || null, status: data.status, progress: data.progress,
         description: data.description || null, issueNote: data.issueNote || null,
         startDate: data.startDate || null, dueDate: data.dueDate || null,
+        showDate: data.showDate,
       },
     });
     setModalMode(null);

frontend/src/types/index.ts

@@ -27,6 +27,7 @@ export interface Task {
   issueNote: string | null;
   startDate: string | null;
   dueDate: string | null;
+  showDate: boolean;
   creatorId: string;
   assigneeId: string | null;
   createdAt: string;