diff --git a/apps/web/src/components/layout/app-layout.tsx b/apps/web/src/components/layout/app-layout.tsx
index 0439f4bd..69a63fda 100644
--- a/apps/web/src/components/layout/app-layout.tsx
+++ b/apps/web/src/components/layout/app-layout.tsx
@@ -127,6 +127,7 @@ export function AppLayout({
       <Header
         locale={locale}
         sidebarCollapsed={shellCollapsed}
+        compact={mobileShell}
       />
 
       {/* Main Content */}
diff --git a/apps/web/src/components/layout/header.tsx b/apps/web/src/components/layout/header.tsx
index 4b1d0018..84dced89 100644
--- a/apps/web/src/components/layout/header.tsx
+++ b/apps/web/src/components/layout/header.tsx
@@ -177,6 +177,7 @@ export function Header({
         <button
           onClick={() => switchLocale('zh-TW')}
           style={{
+            display: compact ? 'none' : 'block',
             padding: '5px 12px',
             fontFamily: 'var(--font-body), "DM Mono", monospace',
             fontSize: 11,
@@ -194,6 +195,7 @@ export function Header({
         <button
           onClick={() => switchLocale('en')}
           style={{
+            display: compact ? 'none' : 'block',
             padding: '5px 12px',
             fontFamily: 'var(--font-body), "DM Mono", monospace',
             fontSize: 11,
@@ -211,11 +213,11 @@ export function Header({
 
         {/* Avatar — 34px 圓形 #d97757 */}
         <div style={{
+          display: compact ? 'none' : 'flex',
           width: 34,
           height: 34,
           borderRadius: '50%',
           background: '#d97757',
-          display: 'flex',
           alignItems: 'center',
           justifyContent: 'center',
           fontSize: 12,
diff --git a/apps/web/src/components/layout/sidebar.tsx b/apps/web/src/components/layout/sidebar.tsx
index d31ea0a4..5e0cb3b5 100644
--- a/apps/web/src/components/layout/sidebar.tsx
+++ b/apps/web/src/components/layout/sidebar.tsx
@@ -72,7 +72,7 @@ type NavSection = {
 // 可觀測性 /observability → 整合: 監控 + APM + 錯誤 + 應用 + 服務 (5 Tab) [暫指 /monitoring]
 // 自動化 /automation → 整合: 自動修復 + 神經指揮 + Drift (3 Tab) [暫指 /auto-repair]
 // 營運 /operations → 整合: 部署 + 工單 + 成本 + 行動日誌 + 計費 (5 Tab) [暫指 /deployments]
-// IwoooS 安全合規 /iwooos → 整合: IwoooS + 安全合規；/security-compliance 保留相容高亮
+// IwoooS /iwooos → 單一資安主入口；/security-compliance 保留相容高亮
 // 知識 /knowledge → 知識庫 [暫指 /knowledge-base]
 // ============================================================
 
@@ -85,7 +85,7 @@ const NAV_SECTIONS: NavSection[] = [
       { id: 'observability',       href: '/observability',          labelKey: 'observability',     Icon: Monitor },
       { id: 'automation',          href: '/automation',             labelKey: 'automation',        Icon: Wrench },
       { id: 'operations',          href: '/operations',             labelKey: 'operations',        Icon: Package },
-      { id: 'iwooos-security',     href: '/iwooos',                 labelKey: 'iwooosSecurityCompliance', Icon: Radar, aliases: ['/security-compliance'] },
+      { id: 'iwooos-security',     href: '/iwooos',                 labelKey: 'iwooos', Icon: Radar, aliases: ['/security-compliance'] },
       { id: 'knowledge',           href: '/knowledge',              labelKey: 'knowledge',         Icon: BookOpen },
       { id: 'governance',          href: '/governance',             labelKey: 'governance',        Icon: ShieldCheck },
       { id: 'awooop',              href: '/awooop/work-items',      labelKey: 'awooop',           Icon: BrainCircuit },
diff --git a/docs/LOGBOOK.md b/docs/LOGBOOK.md
index ddd42025..f46cdcbf 100644
--- a/docs/LOGBOOK.md
+++ b/docs/LOGBOOK.md
@@ -1,3 +1,49 @@
+## 2026-05-31｜IwoooS 側欄單一資安入口收斂
+
+**背景**：
+
+- 正式站驗收確認 `https://awoooi.wooo.work/zh-TW/iwooos` 已可見 Kali 112 只讀快照，但桌面側欄仍把主入口顯示成「IwoooS 安全合規」，容易讓使用者以為「安全合規」與 IwoooS 是兩個菜單或兩套資安敘事。
+- 使用者要求兩個菜單整合在一起；本輪採取低風險處理：不移除 `/security-compliance` 相容路由，只把側欄主入口收斂為單一 `IwoooS`。
+
+**本次調整**：
+
+- `apps/web/src/components/layout/sidebar.tsx`：側欄項目 `iwooos-security` 改用 `nav.iwooos`，顯示文字成為 `IwoooS`；`/security-compliance` 繼續保留為 alias，避免既有連結失效。
+- `apps/web/src/components/layout/app-layout.tsx` / `apps/web/src/components/layout/header.tsx`：手機 shell 啟用 compact header，收起語系按鈕與頭像，避免 IwoooS 手機寬度出現橫向溢出。
+- `scripts/security/security-mirror-progress-guard.py`：guard 改為要求側欄使用 `labelKey: 'iwooos'`，並禁止回到 `labelKey: 'iwooosSecurityCompliance'`。
+- 維持 Gate 0 邊界：不新增掃描、修復、批准、部署按鈕或主機動作。
+
+**驗證狀態**：
+
+```text
+local:
+  python3 scripts/security/security-mirror-progress-guard.py
+    -> SECURITY_MIRROR_PROGRESS_GUARD_OK
+  python3 scripts/security/source-control-owner-response-guard.py
+    -> SOURCE_CONTROL_OWNER_RESPONSE_GUARD_OK
+  python3 -m json.tool apps/web/messages/zh-TW.json / en.json
+    -> pass
+  cmp apps/web/messages/zh-TW.json apps/web/messages/en.json
+    -> pass
+  python3 -m py_compile scripts/security/security-mirror-progress-guard.py scripts/security/source-control-owner-response-guard.py
+    -> pass
+  git diff --check
+    -> pass
+  NEXT_PUBLIC_API_URL=https://awoooi.wooo.work pnpm --dir apps/web run build
+    -> pass
+  pnpm --dir apps/web run typecheck
+    -> pass
+  local production smoke on 127.0.0.1:3017:
+    zh-TW/en desktop + mobile
+    visible: 只讀通過 / 待更新套件 1994 / 失敗 systemd unit 1
+    desktop nav: IwoooS visible, 安全合規 not visible
+    mobile: horizontalOverflow=false after mobile shell hydration
+    Incident ID English residual=false
+```
+
+**待辦**：
+
+- 待推版後補上正式部署標記與 production smoke。
+
 ## 2026-05-31｜AwoooP Run 詳情單一 Incident 處理流程 drill-down
 
 **背景**：
diff --git a/scripts/security/security-mirror-progress-guard.py b/scripts/security/security-mirror-progress-guard.py
index 72331d08..f5c6789e 100755
--- a/scripts/security/security-mirror-progress-guard.py
+++ b/scripts/security/security-mirror-progress-guard.py
@@ -204,18 +204,19 @@ def validate(root: Path) -> None:
     assert_contains("intake.contracts", intake_contracts, "iwooos_posture_projection_v1")
 
     assert_text_contains("sidebar.iwooos_security_unified_entry", sidebar, "id: 'iwooos-security'")
-    assert_text_contains("sidebar.iwooos_security_label", sidebar, "labelKey: 'iwooosSecurityCompliance'")
+    assert_text_contains("sidebar.iwooos_security_label", sidebar, "labelKey: 'iwooos'")
+    assert_text_not_contains("sidebar.iwooos_security_duplicate_label", sidebar, "labelKey: 'iwooosSecurityCompliance'")
     assert_text_contains("sidebar.security_compliance_alias", sidebar, "aliases: ['/security-compliance']")
     assert_text_not_contains("sidebar.duplicate_security_compliance_entry", sidebar, "id: 'security-compliance'")
     assert_equal(
-        "web_messages.zh-TW.nav.iwooosSecurityCompliance",
-        web_messages_zh["nav"]["iwooosSecurityCompliance"],
-        "IwoooS 安全合規",
+        "web_messages.zh-TW.nav.iwooos",
+        web_messages_zh["nav"]["iwooos"],
+        "IwoooS",
     )
     assert_equal(
-        "web_messages.en.nav.iwooosSecurityCompliance",
-        web_messages_en["nav"]["iwooosSecurityCompliance"],
-        "IwoooS 安全合規",
+        "web_messages.en.nav.iwooos",
+        web_messages_en["nav"]["iwooos"],
+        "IwoooS",
     )
     assert_equal("web_messages.en.nav.traditional_chinese_mirror", web_messages_en["nav"], web_messages_zh["nav"])
     assert_equal("web_messages.en.iwooos.traditional_chinese_mirror", web_messages_en["iwooos"], web_messages_zh["iwooos"])