diff --git a/app/lib/dashboard.ts b/app/lib/dashboard.ts
index b185e92..a39d3fb 100644
--- a/app/lib/dashboard.ts
+++ b/app/lib/dashboard.ts
@@ -41,7 +41,9 @@ export async function api<T>(path: string, init: RequestInit = {}) {
   const headers = new Headers(init.headers);
   headers.set("accept", "application/json");
   if (init.body) headers.set("content-type", "application/json");
-  Object.entries(DEMO_HEADERS).forEach(([key, value]) => headers.set(key, value));
+  if (AUTH_MODE === "demo") {
+    Object.entries(DEMO_HEADERS).forEach(([key, value]) => headers.set(key, value));
+  }
   const response = await fetch(`${API_BASE}${path}`, { ...init, headers, credentials: "include" });
   const body = (await response.json().catch(() => ({}))) as T & { error?: string; detail?: string };
   if (!response.ok) throw new Error(body.detail || body.error || `Request failed (${response.status})`);
diff --git a/app/page.tsx b/app/page.tsx
index 80dbbde..dd326c5 100644
--- a/app/page.tsx
+++ b/app/page.tsx
@@ -1,10 +1,24 @@
 "use client";
 
+import { useEffect } from "react";
 import Link from "next/link";
+import { useRouter } from "next/navigation";
 import { ArrowRight, Boxes, FileArchive, Gauge, KeyRound, ShieldCheck, UploadCloud } from "lucide-react";
 import { AUTH_MODE, API_BASE } from "@/app/lib/dashboard";
 
 export default function Home() {
+  const router = useRouter();
+
+  // SSOモードでログイン済みなら、ランディングを挟まずダッシュボードへ向かう。
+  useEffect(() => {
+    if (AUTH_MODE !== "oidc") return;
+    let cancelled = false;
+    fetch(`${API_BASE}/api/v1/me`, { credentials: "include" })
+      .then((response) => { if (response.ok && !cancelled) router.replace("/dashboard"); })
+      .catch(() => {});
+    return () => { cancelled = true; };
+  }, [router]);
+
   return <main className="landing">
     <header className="landing-header">
       <Link className="landing-brand" href="/"><span className="admin-brand-mark">A</span><span>AltDock</span><span className="landing-beta">BETA</span></Link>
@@ -24,7 +38,7 @@ export default function Home() {
           <Link className="ui-button ui-button-primary" href="/dashboard">ダッシュボードを開く <ArrowRight size={15} /></Link>
           <a className="ui-button ui-button-outline" href="https://faq.altstore.io/developers/distribute-with-altstore-pal" target="_blank" rel="noreferrer">配布要件を見る</a>
         </div>
-        <div className="landing-hero-meta"><Gauge size={14} />Demo mode で起動中 · API <code>{API_BASE}</code></div>
+        {AUTH_MODE === "demo" && <div className="landing-hero-meta"><Gauge size={14} />Demo mode で起動中 · API <code>{API_BASE}</code></div>}
       </div>
       <aside className="landing-hero-card" aria-hidden="true">
         <div className="landing-flow-step"><span className="landing-flow-num">1</span><span><UploadCloud size={16} />ADP ZIPをアップロード</span></div>
diff --git a/apps/api/src/auth.ts b/apps/api/src/auth.ts
index e1aecde..8865972 100644
--- a/apps/api/src/auth.ts
+++ b/apps/api/src/auth.ts
@@ -116,7 +116,8 @@ export async function registerAuthRoutes(app: FastifyInstance, appConfig: AppCon
     reply.clearCookie(stateCookie, { path: "/auth" });
     reply.clearCookie(verifierCookie, { path: "/auth" });
     reply.clearCookie(nonceCookie, { path: "/auth" });
-    return reply.redirect(appConfig.WEB_ORIGIN);
+    // SSO成功後はランディングではなく管理ダッシュボードへ直接向かう。
+    return reply.redirect(`${appConfig.WEB_ORIGIN.replace(/\/$/, "")}/dashboard`);
   });
 
   app.get("/auth/logout", async (_request, reply) => {
diff --git a/components/altdock/admin-shell.tsx b/components/altdock/admin-shell.tsx
index 618305b..7bad128 100644
--- a/components/altdock/admin-shell.tsx
+++ b/components/altdock/admin-shell.tsx
@@ -9,6 +9,7 @@ import Link from "next/link";
 import { useEffect, useMemo, useState, type ComponentType, type PropsWithChildren } from "react";
 import { AppWindow, BookOpen, Boxes, ChevronDown, ExternalLink, FileArchive, Gauge, Menu, PanelLeftClose, PanelLeftOpen, Plus, Search, Settings2, UploadCloud, X } from "lucide-react";
 import { API_BASE, AUTH_MODE, formatBytes } from "@/app/lib/dashboard";
+import type { Identity } from "@/packages/core/src/index";
 import { useDashboard } from "./dashboard-provider";
 
 type NavItem = { href: string; label: string; icon: ComponentType<{ size?: number; strokeWidth?: number }> };
@@ -34,6 +35,7 @@ function SideNavigation({ collapsed, onNavigate }: { collapsed?: boolean; onNavi
   const pathname = usePathname();
   const router = useRouter();
   const { dashboard } = useDashboard();
+  const { identity } = useIdentity();
 
   const renderItem = (item: NavItem) => {
     const external = item.href.startsWith("http");
@@ -55,10 +57,24 @@ function SideNavigation({ collapsed, onNavigate }: { collapsed?: boolean; onNavi
     <nav className="admin-nav admin-nav-secondary" aria-label="その他のナビゲーション">{secondaryNav.map(renderItem)}</nav>
     <div className="admin-sidebar-spacer" />
     {!collapsed && <div className="admin-storage-card"><div className="admin-storage-row"><span>保存容量</span><strong>{formatBytes(dashboard?.usage.storageBytes || 0)} / {formatBytes(dashboard?.limits.maxStorageBytes || 0)}</strong></div><div className="admin-progress"><span style={{ width: `${storagePercent}%` }} /></div><small>Free workspace plan</small></div>}
-    {!collapsed && <div className="admin-user-card"><span className="admin-user-avatar">D</span><span><strong>Demo Developer</strong><small>demo@altdock.local</small></span><span className="admin-user-menu">···</span></div>}
+    {!collapsed && <div className="admin-user-card"><span className="admin-user-avatar">{(identity?.displayName || "D").slice(0, 1).toUpperCase()}</span><span><strong>{identity?.displayName || "Demo Developer"}</strong><small>{identity?.email || "demo@altdock.local"}</small></span><span className="admin-user-menu">···</span></div>}
   </div>;
 }
 
+function useIdentity() {
+  const [identity, setIdentity] = useState<Identity | null>(null);
+  useEffect(() => {
+    if (AUTH_MODE !== "oidc") return;
+    let cancelled = false;
+    fetch(`${API_BASE}/api/v1/me`, { credentials: "include" })
+      .then((response) => response.ok ? response.json() : null)
+      .then((body) => { if (!cancelled && body?.identity) setIdentity(body.identity as Identity); })
+      .catch(() => {});
+    return () => { cancelled = true; };
+  }, []);
+  return { identity };
+}
+
 function CommandPalette({ open, onOpenChange }: { open: boolean; onOpenChange: (open: boolean) => void }) {
   const router = useRouter();
   const commands = useMemo(() => primaryNav.map((item) => ({ ...item, action: () => router.push(item.href) })), [router]);
@@ -71,6 +87,7 @@ export function AdminShell({ children }: PropsWithChildren) {
   const [commandOpen, setCommandOpen] = useState(false);
   const pathname = usePathname();
   const { notice, dismissNotice, dashboard } = useDashboard();
+  const { identity } = useIdentity();
 
   useEffect(() => {
     const handleShortcut = (event: KeyboardEvent) => {
@@ -87,7 +104,7 @@ export function AdminShell({ children }: PropsWithChildren) {
       <aside className={`admin-sidebar ${collapsed ? "is-collapsed" : ""}`}><SideNavigation collapsed={collapsed} /></aside>
       <Dialog open={mobileOpen} onOpenChange={setMobileOpen}><DialogContent className="mobile-nav-dialog"><DialogTitle className="sr-only">管理画面ナビゲーション</DialogTitle><DialogDescription className="sr-only">管理画面の移動先を選択します。</DialogDescription><button className="mobile-nav-close" onClick={() => setMobileOpen(false)} aria-label="ナビゲーションを閉じる"><X size={17} /></button><SideNavigation onNavigate={() => setMobileOpen(false)} /></DialogContent></Dialog>
       <section className="admin-main-column">
-        <header className="admin-topbar"><div className="admin-topbar-left"><Button className="mobile-menu-button" variant="ghost" size="icon" onClick={() => setMobileOpen(true)} aria-label="ナビゲーションを開く"><Menu size={18} /></Button><div className="admin-breadcrumb"><span>Workspace</span><span>/</span><strong>{pageLabel}</strong></div></div><div className="admin-topbar-actions"><button className="admin-search-trigger" onClick={() => setCommandOpen(true)}><Search size={15} /><span>検索</span><kbd>⌘ K</kbd></button><Link className="admin-topbar-action" href="/dashboard/releases?upload=1"><Plus size={15} />新しいリリース</Link>{AUTH_MODE === "oidc" ? <a className="admin-auth-link" href={`${API_BASE}/auth/login`}>SSOでログイン</a> : <a className="admin-auth-link" href={`${API_BASE}/healthz`} target="_blank" rel="noreferrer">API status</a>}</div></header>
+        <header className="admin-topbar"><div className="admin-topbar-left"><Button className="mobile-menu-button" variant="ghost" size="icon" onClick={() => setMobileOpen(true)} aria-label="ナビゲーションを開く"><Menu size={18} /></Button><div className="admin-breadcrumb"><span>Workspace</span><span>/</span><strong>{pageLabel}</strong></div></div><div className="admin-topbar-actions"><button className="admin-search-trigger" onClick={() => setCommandOpen(true)}><Search size={15} /><span>検索</span><kbd>⌘ K</kbd></button><Link className="admin-topbar-action" href="/dashboard/releases?upload=1"><Plus size={15} />新しいリリース</Link>{AUTH_MODE === "oidc" ? (!identity ? <a className="admin-auth-link" href={`${API_BASE}/auth/login`}>SSOでログイン</a> : null) : <a className="admin-auth-link" href={`${API_BASE}/healthz`} target="_blank" rel="noreferrer">API status</a>}</div></header>
         <div className="admin-content">{children}</div>
       </section>
       <button className="admin-collapse-toggle" onClick={() => setCollapsed((value) => !value)} aria-label={collapsed ? "サイドバーを展開" : "サイドバーを折りたたむ"}>{collapsed ? <PanelLeftOpen size={16} /> : <PanelLeftClose size={16} />}</button>