refactor(insta): instaUtils(fmtDate)+usePollTask 훅+StatusBadge/TaskStatusBox 추출

src/pages/insta/InstaCards.jsx

@@ -21,81 +21,10 @@ import {
   putInstaPreferences,
 } from '../../api';
 import './InstaCards.css';
-
-/* ────────────────────── 유틸 ────────────────────── */
-function fmtDate(iso) {
-  if (!iso) return '';
-  return new Date(iso).toLocaleDateString('ko-KR', {
-    month: 'short',
-    day: 'numeric',
-    hour: '2-digit',
-    minute: '2-digit',
-  });
-}
-
-function StatusBadge({ status }) {
-  return (
-    <span className={`ic-status-badge ic-status-badge--${status || 'draft'}`}>
-      {status || 'draft'}
-    </span>
-  );
-}
-
-/* ────────────────────── 폴링 훅 ────────────────────── */
-function usePollTask(onDone) {
-  const [taskId, setTaskId] = useState(null);
-  const [task, setTask] = useState(null);
-  const timer = useRef(null);
-
-  useEffect(() => {
-    if (!taskId) return;
-    let cancelled = false;
-    const poll = async () => {
-      try {
-        const t = await getInstaTask(taskId);
-        if (cancelled) return;
-        setTask(t);
-        if (t.status === 'succeeded' || t.status === 'failed') {
-          setTaskId(null);
-          onDone?.(t);
-        } else {
-          timer.current = setTimeout(poll, 3000);
-        }
-      } catch {
-        if (!cancelled) timer.current = setTimeout(poll, 3000);
-      }
-    };
-    poll();
-    return () => {
-      cancelled = true;
-      clearTimeout(timer.current);
-    };
-  }, [taskId]); // eslint-disable-line react-hooks/exhaustive-deps
-
-  return {
-    taskId,
-    task,
-    start: setTaskId,
-    clear: () => { setTaskId(null); setTask(null); },
-  };
-}
-
-/* ────────────────────── TaskStatusBox ────────────────────── */
-function TaskStatusBox({ task }) {
-  if (!task) return null;
-  const pct = task.progress != null ? task.progress : (task.status === 'succeeded' ? 100 : 0);
-  return (
-    <div className="ic-task-status">
-      <div className="ic-task-status__label">
-        {task.status === 'succeeded' ? '완료' : task.status === 'failed' ? '실패' : '진행 중'}
-      </div>
-      <div className="ic-task-status__msg">{task.message || task.error || ''}</div>
-      <div className="ic-task-status__progress">
-        <div className="ic-task-status__fill" style={{ width: `${pct}%` }} />
-      </div>
-    </div>
-  );
-}
+import { fmtDate } from './instaUtils';
+import usePollTask from './hooks/usePollTask';
+import StatusBadge from './components/StatusBadge';
+import TaskStatusBox from './components/TaskStatusBox';
 
 /* ══════════════════════ Trends 탭 패널 1: AccountFocusPanel ══════════════ */
 function AccountFocusPanel() {

src/pages/insta/components/StatusBadge.jsx

@@ -0,0 +1,11 @@
+import React from 'react';
+
+function StatusBadge({ status }) {
+  return (
+    <span className={`ic-status-badge ic-status-badge--${status || 'draft'}`}>
+      {status || 'draft'}
+    </span>
+  );
+}
+
+export default StatusBadge;

src/pages/insta/components/TaskStatusBox.jsx

@@ -0,0 +1,20 @@
+import React from 'react';
+
+/* ────────────────────── TaskStatusBox ────────────────────── */
+function TaskStatusBox({ task }) {
+  if (!task) return null;
+  const pct = task.progress != null ? task.progress : (task.status === 'succeeded' ? 100 : 0);
+  return (
+    <div className="ic-task-status">
+      <div className="ic-task-status__label">
+        {task.status === 'succeeded' ? '완료' : task.status === 'failed' ? '실패' : '진행 중'}
+      </div>
+      <div className="ic-task-status__msg">{task.message || task.error || ''}</div>
+      <div className="ic-task-status__progress">
+        <div className="ic-task-status__fill" style={{ width: `${pct}%` }} />
+      </div>
+    </div>
+  );
+}
+
+export default TaskStatusBox;

src/pages/insta/hooks/usePollTask.js

@@ -0,0 +1,41 @@
+import { useState, useEffect, useRef } from 'react';
+import { getInstaTask } from '../../../api';
+
+/* ────────────────────── 폴링 훅 ────────────────────── */
+export default function usePollTask(onDone) {
+  const [taskId, setTaskId] = useState(null);
+  const [task, setTask] = useState(null);
+  const timer = useRef(null);
+
+  useEffect(() => {
+    if (!taskId) return;
+    let cancelled = false;
+    const poll = async () => {
+      try {
+        const t = await getInstaTask(taskId);
+        if (cancelled) return;
+        setTask(t);
+        if (t.status === 'succeeded' || t.status === 'failed') {
+          setTaskId(null);
+          onDone?.(t);
+        } else {
+          timer.current = setTimeout(poll, 3000);
+        }
+      } catch {
+        if (!cancelled) timer.current = setTimeout(poll, 3000);
+      }
+    };
+    poll();
+    return () => {
+      cancelled = true;
+      clearTimeout(timer.current);
+    };
+  }, [taskId]); // eslint-disable-line react-hooks/exhaustive-deps
+
+  return {
+    taskId,
+    task,
+    start: setTaskId,
+    clear: () => { setTaskId(null); setTask(null); },
+  };
+}

src/pages/insta/instaUtils.js

@@ -0,0 +1,10 @@
+// src/pages/insta/instaUtils.js
+export function fmtDate(iso) {
+  if (!iso) return '';
+  return new Date(iso).toLocaleDateString('ko-KR', {
+    month: 'short',
+    day: 'numeric',
+    hour: '2-digit',
+    minute: '2-digit',
+  });
+}

src/pages/insta/instaUtils.test.js

@@ -0,0 +1,15 @@
+import { describe, it, expect } from 'vitest';
+import { fmtDate } from './instaUtils';
+
+describe('instaUtils.fmtDate', () => {
+  it('returns empty string for falsy input', () => {
+    expect(fmtDate('')).toBe('');
+    expect(fmtDate(null)).toBe('');
+    expect(fmtDate(undefined)).toBe('');
+  });
+  it('returns a non-empty string for a valid ISO date (locale/tz-dependent format)', () => {
+    const out = fmtDate('2026-07-10T09:30:00Z');
+    expect(typeof out).toBe('string');
+    expect(out.length).toBeGreaterThan(0);
+  });
+});