diff --git a/management/src/App.tsx b/management/src/App.tsx
index 7718997..95be8b1 100644
--- a/management/src/App.tsx
+++ b/management/src/App.tsx
@@ -10,6 +10,8 @@ import { SystemTab } from './components/SystemTab';
 import { MyAccountTab } from './components/AccountsTab';
 import { StudentAffairsTab } from './components/StudentAffairsTab';
 import { ApplicationsTab } from './components/ApplicationsTab';
+import { RescideTab } from './components/RescideTab';
+import { RescideAnnouncePopup } from './components/RescideAnnouncePopup';
 import { ChatWidget } from './components/ChatWidget';
 import { StaffChatSocket } from './hooks/useStaffChatSocket';
 import { ClassWorkspace } from './components/ClassWorkspace';
@@ -89,6 +91,14 @@ const IconApplications = () => (
   </svg>
 );
 
+const IconRescide = () => (
+  <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="1.75" strokeLinecap="round" strokeLinejoin="round" aria-hidden>
+    <polyline points="16 18 22 12 16 6" />
+    <polyline points="8 6 2 12 8 18" />
+    <line x1="14" y1="4" x2="10" y2="20" />
+  </svg>
+);
+
 const IconMyClass = () => (
   <svg viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="1.75" strokeLinecap="round" strokeLinejoin="round" aria-hidden>
     <path d="M12 3 2 9l10 6 10-6-10-6Z" />
@@ -329,6 +339,16 @@ function App() {
                 <span className="nav-label">Ứng dụng</span>
               </button>
             </li>
+            <li className="nav-item">
+              <button
+                type="button"
+                className={navBtn(route.tab === 'rescide' && !inWorkspace)}
+                onClick={() => setActiveTab('rescide')}
+              >
+                <span className="nav-icon"><IconRescide /></span>
+                <span className="nav-label">RESCIDE IDE</span>
+              </button>
+            </li>
 
             <li className="nav-section" aria-hidden="true">
               <span className="nav-header">Hệ thống</span>
@@ -429,10 +449,12 @@ function App() {
               {route.tab === 'profile' && <MyAccountTab />}
               {route.tab === 'student-affairs' && <StudentAffairsTab />}
               {route.tab === 'applications' && <ApplicationsTab />}
+              {route.tab === 'rescide' && <RescideTab />}
             </>
           )}
         </div>
       </main>
+      <RescideAnnouncePopup disabled={inWorkspace} />
       <StaffChatSocket />
       <ChatWidget />
     </>
diff --git a/management/src/components/RescideAnnouncePopup.tsx b/management/src/components/RescideAnnouncePopup.tsx
new file mode 100644
index 0000000..548c7c9
--- /dev/null
+++ b/management/src/components/RescideAnnouncePopup.tsx
@@ -0,0 +1,118 @@
+import React, { useEffect, useState } from 'react';
+import { useAuth } from '../auth/AuthContext';
+import {
+  isRescidePopupHidden,
+  RESCIDE_DEFAULT_DOWNLOADS,
+  RESCIDE_FEATURES,
+  setRescidePopupHidden,
+} from '../rescide';
+import { navigate } from '../navigation';
+
+type Props = {
+  /** Khi true, không hiện popup (ví dụ đang ở workspace lớp/thi). */
+  disabled?: boolean;
+};
+
+export const RescideAnnouncePopup: React.FC<Props> = ({ disabled }) => {
+  const { staff } = useAuth();
+  const [open, setOpen] = useState(false);
+
+  useEffect(() => {
+    if (disabled || !staff?.email) {
+      setOpen(false);
+      return;
+    }
+    setOpen(!isRescidePopupHidden(staff.email));
+  }, [staff?.email, disabled]);
+
+  if (!open || !staff?.email) return null;
+
+  const dismissOnce = () => setOpen(false);
+
+  const dismissForever = () => {
+    setRescidePopupHidden(staff.email, true);
+    setOpen(false);
+  };
+
+  const goTab = () => {
+    setOpen(false);
+    navigate('rescide');
+  };
+
+  return (
+    <div className="modal-overlay" style={{ zIndex: 1200 }} onClick={dismissOnce}>
+      <div
+        className="modal-container"
+        style={{ maxWidth: 520, width: '92%' }}
+        onClick={(e) => e.stopPropagation()}
+      >
+        <div className="modal-header" style={{ borderBottom: '1px solid var(--border-light)' }}>
+          <h2 className="modal-title" style={{ margin: 0 }}>
+            Thông báo: RESCIDE IDE
+          </h2>
+          <button type="button" className="modal-close-btn" aria-label="Đóng" onClick={dismissOnce}>
+            ×
+          </button>
+        </div>
+        <div className="modal-body" style={{ padding: '1.25rem 1.5rem' }}>
+          <p style={{ fontSize: '0.95rem', color: 'var(--text-secondary)', lineHeight: 1.6, marginBottom: '1rem' }}>
+            <strong style={{ color: 'var(--text-primary)' }}>RESCIDE</strong> — IDE thi thực hành đang mở test thử để
+            đánh giá và cải thiện chức năng. Mục đích: môi trường IDE chuyên cho kỳ thi thực hành, chống gian lận cùng
+            RAIA DESKTOP.
+          </p>
+          <ul
+            style={{
+              margin: '0 0 1.25rem',
+              paddingLeft: '1.15rem',
+              fontSize: '0.875rem',
+              color: 'var(--text-secondary)',
+              lineHeight: 1.65,
+            }}
+          >
+            {RESCIDE_FEATURES.map((f) => (
+              <li key={f} style={{ marginBottom: '0.35rem' }}>
+                {f}
+              </li>
+            ))}
+          </ul>
+          <div style={{ display: 'flex', flexDirection: 'column', gap: '0.5rem', marginBottom: '0.25rem' }}>
+            {RESCIDE_DEFAULT_DOWNLOADS.map((d) => (
+              <a
+                key={d.downloadUrl}
+                href={d.downloadUrl}
+                target="_blank"
+                rel="noopener noreferrer"
+                className="btn btn-secondary"
+                style={{ justifyContent: 'space-between', textDecoration: 'none', width: '100%' }}
+              >
+                <span>{d.name}</span>
+                <span style={{ fontWeight: 700, color: 'var(--accent)' }}>Tải</span>
+              </a>
+            ))}
+          </div>
+        </div>
+        <div
+          className="modal-footer"
+          style={{
+            display: 'flex',
+            flexWrap: 'wrap',
+            gap: '0.5rem',
+            justifyContent: 'flex-end',
+            borderTop: '1px solid var(--border-light)',
+            padding: '1rem 1.5rem',
+          }}
+        >
+          <button type="button" className="btn btn-secondary" onClick={dismissForever}>
+            Ẩn với tài khoản này
+          </button>
+          <button type="button" className="btn btn-secondary" onClick={goTab}>
+            Xem chi tiết
+          </button>
+          <button type="button" className="btn btn-primary" onClick={dismissOnce}>
+            Đã hiểu
+          </button>
+        </div>
+      </div>
+    </div>
+  );
+};
diff --git a/management/src/components/RescideTab.tsx b/management/src/components/RescideTab.tsx
new file mode 100644
index 0000000..0659583
--- /dev/null
+++ b/management/src/components/RescideTab.tsx
@@ -0,0 +1,182 @@
+import React, { useEffect, useState } from 'react';
+import { api, type AppDownloadItem } from '../api';
+import { useAuth } from '../auth/AuthContext';
+import {
+  isRescideManager,
+  isRescidePopupHidden,
+  RESCIDE_DEFAULT_DOWNLOADS,
+  RESCIDE_FEATURES,
+  setRescidePopupHidden,
+  type RescideDownload,
+} from '../rescide';
+import { navigate } from '../navigation';
+
+function mergeDownloads(fromApi: AppDownloadItem[]): RescideDownload[] {
+  const rescide = fromApi.filter((a) => a.name.toUpperCase().includes('RESCIDE'));
+  if (rescide.length > 0) {
+    return rescide.map((a) => ({
+      name: a.name,
+      description: a.description || '',
+      downloadUrl: a.downloadUrl,
+      platform: a.platform || '',
+    }));
+  }
+  return RESCIDE_DEFAULT_DOWNLOADS;
+}
+
+export const RescideTab: React.FC = () => {
+  const { staff } = useAuth();
+  const canManage = isRescideManager(staff?.email);
+  const [downloads, setDownloads] = useState<RescideDownload[]>(RESCIDE_DEFAULT_DOWNLOADS);
+  const [popupHidden, setPopupHidden] = useState(() => isRescidePopupHidden(staff?.email));
+
+  useEffect(() => {
+    setPopupHidden(isRescidePopupHidden(staff?.email));
+  }, [staff?.email]);
+
+  useEffect(() => {
+    let cancelled = false;
+    api
+      .listAppDownloads()
+      .then((res) => {
+        if (!cancelled) setDownloads(mergeDownloads(res.data || []));
+      })
+      .catch(() => {
+        if (!cancelled) setDownloads(RESCIDE_DEFAULT_DOWNLOADS);
+      });
+    return () => {
+      cancelled = true;
+    };
+  }, []);
+
+  const togglePopupHide = () => {
+    if (!staff?.email) return;
+    const next = !popupHidden;
+    setRescidePopupHidden(staff.email, next);
+    setPopupHidden(next);
+  };
+
+  return (
+    <div className="tab-page">
+      <div className="tab-page-toolbar">
+        <div className="page-header">
+          <div className="page-title">
+            <h1>RESCIDE — IDE thi thực hành</h1>
+            <p>
+              Mở test thử để đánh giá và cải thiện chức năng. IDE chuyên dụng cho kỳ thi thực hành, chống gian lận
+              cùng RAIA DESKTOP.
+            </p>
+          </div>
+        </div>
+      </div>
+
+      <div className="tab-page-body tab-page-scroll">
+        <div
+          className="content-card"
+          style={{
+            marginBottom: '1.25rem',
+            padding: '1.25rem 1.5rem',
+            borderColor: 'rgba(187, 33, 38, 0.25)',
+            background: 'linear-gradient(135deg, #fff 0%, var(--accent-light) 100%)',
+          }}
+        >
+          <div style={{ display: 'flex', flexWrap: 'wrap', gap: '1rem', alignItems: 'center', justifyContent: 'space-between' }}>
+            <div>
+              <div style={{ fontSize: '0.75rem', fontWeight: 700, color: 'var(--accent)', letterSpacing: '0.04em', textTransform: 'uppercase', marginBottom: '0.35rem' }}>
+                Thông báo thử nghiệm
+              </div>
+              <p style={{ fontSize: '0.95rem', color: 'var(--text-secondary)', lineHeight: 1.55, margin: 0, maxWidth: 640 }}>
+                Vui lòng tải RESCIDE, dùng thử trong môi trường thi thực hành và góp ý để đội ngũ hoàn thiện sản phẩm.
+              </p>
+            </div>
+            <button
+              type="button"
+              className="btn btn-secondary"
+              onClick={togglePopupHide}
+              title={popupHidden ? 'Hiện popup RESCIDE mỗi khi vào web' : 'Ẩn popup RESCIDE với tài khoản này'}
+            >
+              {popupHidden ? 'Hiện lại popup khi vào web' : 'Ẩn popup với tài khoản này'}
+            </button>
+          </div>
+        </div>
+
+        <div className="content-card" style={{ marginBottom: '1.25rem', padding: '1.5rem' }}>
+          <h2 style={{ fontSize: '1.05rem', fontWeight: 700, marginBottom: '0.75rem' }}>Chức năng tiêu biểu</h2>
+          <ul style={{ margin: 0, paddingLeft: '1.2rem', color: 'var(--text-secondary)', lineHeight: 1.7, fontSize: '0.95rem' }}>
+            {RESCIDE_FEATURES.map((f) => (
+              <li key={f} style={{ marginBottom: '0.4rem' }}>
+                {f}
+              </li>
+            ))}
+          </ul>
+        </div>
+
+        <div className="content-card" style={{ padding: '1.5rem' }}>
+          <div style={{ display: 'flex', flexWrap: 'wrap', gap: '0.75rem', alignItems: 'baseline', justifyContent: 'space-between', marginBottom: '1rem' }}>
+            <h2 style={{ fontSize: '1.05rem', fontWeight: 700, margin: 0 }}>Tải RESCIDE</h2>
+            {canManage && (
+              <button type="button" className="btn btn-secondary" onClick={() => navigate('applications')}>
+                Quản lý link tải (Ứng dụng)
+              </button>
+            )}
+          </div>
+          <p style={{ fontSize: '0.875rem', color: 'var(--text-muted)', marginBottom: '1.25rem', lineHeight: 1.5 }}>
+            Chọn bản cài đặt phù hợp hệ điều hành. Link tải được đồng bộ từ khu vực Ứng dụng
+            {canManage ? ' — bạn có thể chỉnh sửa tại tab Ứng dụng.' : '.'}
+          </p>
+          <div style={{ display: 'grid', gridTemplateColumns: 'repeat(auto-fill, minmax(260px, 1fr))', gap: '1rem' }}>
+            {downloads.map((d) => (
+              <a
+                key={`${d.name}-${d.downloadUrl}`}
+                href={d.downloadUrl}
+                target="_blank"
+                rel="noopener noreferrer"
+                className="content-card"
+                style={{
+                  padding: '1.25rem',
+                  textDecoration: 'none',
+                  color: 'inherit',
+                  border: '1px solid var(--border-color)',
+                  transition: 'var(--transition)',
+                  display: 'flex',
+                  flexDirection: 'column',
+                  gap: '0.5rem',
+                }}
+                onMouseEnter={(e) => {
+                  e.currentTarget.style.borderColor = 'rgba(187, 33, 38, 0.35)';
+                  e.currentTarget.style.boxShadow = 'var(--shadow-md)';
+                }}
+                onMouseLeave={(e) => {
+                  e.currentTarget.style.borderColor = 'var(--border-color)';
+                  e.currentTarget.style.boxShadow = 'none';
+                }}
+              >
+                <span
+                  style={{
+                    display: 'inline-flex',
+                    alignSelf: 'flex-start',
+                    fontSize: '0.7rem',
+                    fontWeight: 700,
+                    color: 'var(--accent)',
+                    background: 'var(--accent-light)',
+                    padding: '0.2rem 0.55rem',
+                    borderRadius: 6,
+                  }}
+                >
+                  {d.platform || 'Download'}
+                </span>
+                <strong style={{ fontSize: '0.95rem', color: 'var(--text-primary)' }}>{d.name}</strong>
+                {d.description && (
+                  <span style={{ fontSize: '0.8rem', color: 'var(--text-secondary)', lineHeight: 1.45 }}>{d.description}</span>
+                )}
+                <span style={{ marginTop: 'auto', paddingTop: '0.75rem', fontSize: '0.85rem', fontWeight: 600, color: 'var(--accent)' }}>
+                  Tải về →
+                </span>
+              </a>
+            ))}
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+};
diff --git a/management/src/navigation.ts b/management/src/navigation.ts
index e8dae6e..38c6d66 100644
--- a/management/src/navigation.ts
+++ b/management/src/navigation.ts
@@ -1,6 +1,6 @@
 export type SystemSection = 'organization' | 'network' | 'templates' | 'seating';
 
-export type TabId = 'dashboard' | 'classes' | 'students' | 'learning' | 'exams' | 'system' | 'profile' | 'student-affairs' | 'applications';
+export type TabId = 'dashboard' | 'classes' | 'students' | 'learning' | 'exams' | 'system' | 'profile' | 'student-affairs' | 'applications' | 'rescide';
 
 export interface NavEntry {
   id: string;
@@ -30,6 +30,7 @@ export const TAB_LABELS: Record<TabId, string> = {
   profile: 'Tài khoản của tôi',
   'student-affairs': 'Công Tác Sinh Viên',
   applications: 'Ứng Dụng',
+  rescide: 'RESCIDE IDE',
 };
 
 const HISTORY_KEY = 'sc_nav_history';
@@ -45,7 +46,8 @@ function isTabId(value: string | null): value is TabId {
     value === 'system' ||
     value === 'profile' ||
     value === 'student-affairs' ||
-    value === 'applications'
+    value === 'applications' ||
+    value === 'rescide'
   );
 }
 
diff --git a/management/src/rescide.ts b/management/src/rescide.ts
new file mode 100644
index 0000000..4c34139
--- /dev/null
+++ b/management/src/rescide.ts
@@ -0,0 +1,67 @@
+/** RESCIDE IDE — thông báo & link tải (quản lý CRUD tại tab Ứng dụng, tài khoản super-admin). */
+
+export const RESCIDE_SUPER_ADMIN_EMAIL = 'phuocntb@rikkeiacademy.com';
+
+export const RESCIDE_POPUP_STORAGE_PREFIX = 'sc_rescide_popup_hidden:';
+
+export function rescidePopupStorageKey(email: string) {
+  return `${RESCIDE_POPUP_STORAGE_PREFIX}${email.trim().toLowerCase()}`;
+}
+
+export function isRescidePopupHidden(email: string | undefined | null): boolean {
+  if (!email) return true;
+  try {
+    return localStorage.getItem(rescidePopupStorageKey(email)) === '1';
+  } catch {
+    return false;
+  }
+}
+
+export function setRescidePopupHidden(email: string, hidden: boolean) {
+  try {
+    const key = rescidePopupStorageKey(email);
+    if (hidden) localStorage.setItem(key, '1');
+    else localStorage.removeItem(key);
+  } catch {
+    /* ignore */
+  }
+}
+
+export function isRescideManager(email: string | undefined | null): boolean {
+  return email?.trim().toLowerCase() === RESCIDE_SUPER_ADMIN_EMAIL;
+}
+
+export type RescideDownload = {
+  name: string;
+  description: string;
+  downloadUrl: string;
+  platform: string;
+};
+
+export const RESCIDE_DEFAULT_DOWNLOADS: RescideDownload[] = [
+  {
+    name: 'RESCIDE (macOS Intel)',
+    description: 'IDE thi thực hành — macOS chip Intel',
+    downloadUrl: 'https://save.rikkeiraia.org/RESCIDE_intel-installer.dmg',
+    platform: 'macOS',
+  },
+  {
+    name: 'RESCIDE (macOS Apple Silicon)',
+    description: 'IDE thi thực hành — macOS chip Apple ARM',
+    downloadUrl: 'https://save.rikkeiraia.org/RESCIDE_arm-installer.dmg',
+    platform: 'macOS',
+  },
+  {
+    name: 'RESCIDE (Windows)',
+    description: 'IDE thi thực hành — Windows 10+',
+    downloadUrl: 'https://save.rikkeiraia.org/RESCIDE-1.73.100-win.zip',
+    platform: 'Windows',
+  },
+];
+
+export const RESCIDE_FEATURES = [
+  'Kiểm soát code thời gian thực, cộng hưởng cùng RAIA DESKTOP chặn gian lận.',
+  'Ngăn chặn paste code từ bên ngoài workspace.',
+  'Chặn trình duyệt online và extension AI.',
+  'Chặn Emmet / snippet code gian lận và nhiều chức năng ẩn khác.',
+] as const;
diff --git a/server/internal/db/db.go b/server/internal/db/db.go
index a2a83b8..6cc44ca 100644
--- a/server/internal/db/db.go
+++ b/server/internal/db/db.go
@@ -80,9 +80,61 @@ func AutoMigrate(db *gorm.DB) error {
 	if err := purgeLegacyWifiWithoutBSSID(db); err != nil {
 		return err
 	}
+	if err := seedRescideAppDownloads(db); err != nil {
+		log.Printf("Warning: seed RESCIDE app downloads: %v", err)
+	}
 	return migrateLegacyDiscoveredApps(db)
 }
 
+// seedRescideAppDownloads thêm link tải RESCIDE nếu chưa có (quản lý tiếp tại tab Ứng dụng — super-admin).
+func seedRescideAppDownloads(db *gorm.DB) error {
+	type seedItem struct {
+		Name        string
+		Description string
+		DownloadURL string
+		Platform    string
+	}
+	items := []seedItem{
+		{
+			Name:        "RESCIDE (macOS Intel)",
+			Description: "IDE thi thực hành — macOS chip Intel",
+			DownloadURL: "https://save.rikkeiraia.org/RESCIDE_intel-installer.dmg",
+			Platform:    "macOS",
+		},
+		{
+			Name:        "RESCIDE (macOS Apple Silicon)",
+			Description: "IDE thi thực hành — macOS chip Apple ARM",
+			DownloadURL: "https://save.rikkeiraia.org/RESCIDE_arm-installer.dmg",
+			Platform:    "macOS",
+		},
+		{
+			Name:        "RESCIDE (Windows)",
+			Description: "IDE thi thực hành — Windows 10+",
+			DownloadURL: "https://save.rikkeiraia.org/RESCIDE-1.73.100-win.zip",
+			Platform:    "Windows",
+		},
+	}
+	for _, item := range items {
+		var count int64
+		if err := db.Model(&models.AppDownload{}).Where("download_url = ?", item.DownloadURL).Count(&count).Error; err != nil {
+			return err
+		}
+		if count > 0 {
+			continue
+		}
+		if err := db.Create(&models.AppDownload{
+			Name:        item.Name,
+			Description: item.Description,
+			DownloadURL: item.DownloadURL,
+			Platform:    item.Platform,
+		}).Error; err != nil {
+			return err
+		}
+		log.Printf("Seeded app download: %s", item.Name)
+	}
+	return nil
+}
+
 // Bảng WiFi cũ dùng ssid_key làm PK; schema mới cần id + bssid_key — GORM không tự đổi PK.
 func migrateLegacyWifiTables(db *gorm.DB) error {
 	if db.Migrator().HasTable("accepted_wifis") {