대시보드, GNB 추가

src/app/api/dashboard/overview/route.ts

@@ -0,0 +1,220 @@
+import { NextResponse } from "next/server";
+import { PrismaClient } from "@prisma/client";
+import { verifyAccessToken } from "@/features/auth/authCrypto";
+
+// 대시보드 개요 API (/api/dashboard/overview)
+// - 로그인한 사용자의 프로젝트/폼 제출 통계를 집계해 요약/프로젝트별 지표를 반환한다.
+// - DB 스키마: Project, FormSubmission
+// - 인증: pb_access 쿠키(JWT)를 검증해 현재 사용자 식별
+
+const prisma = new PrismaClient();
+
+interface AuthUser {
+  id: string;
+  email: string;
+  tokenVersion: number;
+}
+
+// 공통: pb_access 쿠키에서 JWT 토큰을 추출한다.
+function extractTokenFromCookieHeader(cookieHeader: string | null): string | null {
+  if (!cookieHeader) return null;
+
+  const parts = cookieHeader.split(";");
+  for (const part of parts) {
+    const trimmed = part.trim();
+    if (trimmed.startsWith("pb_access=")) {
+      const value = trimmed.substring("pb_access=".length);
+      return decodeURIComponent(value);
+    }
+  }
+  return null;
+}
+
+// 공통: Request 헤더의 쿠키에서 인증된 유저 정보를 복원한다.
+async function getAuthUserFromRequest(request: Request): Promise<AuthUser | null> {
+  const cookieHeader = request.headers.get("cookie");
+  const token = extractTokenFromCookieHeader(cookieHeader);
+  if (!token) return null;
+
+  const payload = await verifyAccessToken(token);
+  if (!payload) return null;
+
+  return {
+    id: payload.sub,
+    email: payload.email,
+    tokenVersion: payload.tokenVersion,
+  };
+}
+
+interface SummaryStats {
+  totalProjects: number;
+  totalSubmissions: number;
+  todaySubmissions: number;
+  last7DaysSubmissions: number;
+}
+
+interface DailySubmissionItem {
+  // 일별 제출 수 그래프를 위한 집계 데이터
+  date: string; // YYYY-MM-DD (UTC 기준)
+  count: number;
+}
+
+interface ProjectStatsItem {
+  projectId: string;
+  title: string;
+  slug: string;
+  status: string;
+  totalSubmissions: number;
+  lastSubmissionAt: string | null;
+}
+
+// GET /api/dashboard/overview
+// - 현재 로그인 사용자의 프로젝트 목록/폼 제출 내역을 조회해 통계를 계산한다.
+export async function GET(request: Request) {
+  const authUser = await getAuthUserFromRequest(request);
+  if (!authUser) {
+    return NextResponse.json(
+      { message: "대시보드를 조회하려면 로그인이 필요합니다." },
+      { status: 401 },
+    );
+  }
+
+  try {
+    // 현재 사용자 소유 프로젝트와, 해당 사용자가 소유한 제출 내역을 한 번에 로드한다.
+    const [projects, submissions] = await Promise.all([
+      prisma.project.findMany({
+        where: { userId: authUser.id },
+        select: {
+          id: true,
+          title: true,
+          slug: true,
+          status: true,
+        },
+      }),
+      prisma.formSubmission.findMany({
+        where: { userId: authUser.id },
+        select: {
+          id: true,
+          projectId: true,
+          projectSlug: true,
+          createdAt: true,
+        },
+      }),
+    ]);
+
+    const totalProjects = projects.length;
+    const totalSubmissions = submissions.length;
+
+    // 오늘/최근 7일 기준 시각 계산
+    const now = new Date();
+    const startOfToday = new Date(now);
+    startOfToday.setHours(0, 0, 0, 0);
+    const sevenDaysAgo = new Date(now.getTime() - 7 * 24 * 60 * 60 * 1000);
+
+    let todaySubmissions = 0;
+    let last7DaysSubmissions = 0;
+
+    for (const submission of submissions) {
+      const createdAt = submission.createdAt instanceof Date
+        ? submission.createdAt
+        : new Date(submission.createdAt as unknown as string);
+
+      if (createdAt >= startOfToday) {
+        todaySubmissions += 1;
+      }
+
+      if (createdAt >= sevenDaysAgo) {
+        last7DaysSubmissions += 1;
+      }
+    }
+
+    // 프로젝트별 통계 맵을 구성한다.
+    const statsByProjectId = new Map<
+      string,
+      {
+        projectId: string;
+        title: string;
+        slug: string;
+        status: string;
+        totalSubmissions: number;
+        lastSubmissionAt: Date | null;
+      }
+    >();
+
+    for (const project of projects) {
+      statsByProjectId.set(project.id, {
+        projectId: project.id,
+        title: project.title,
+        slug: project.slug,
+        status: project.status,
+        totalSubmissions: 0,
+        lastSubmissionAt: null,
+      });
+    }
+
+    for (const submission of submissions) {
+      const stat = submission.projectId ? statsByProjectId.get(submission.projectId) : null;
+      if (!stat) continue;
+
+      stat.totalSubmissions += 1;
+
+      const createdAt = submission.createdAt instanceof Date
+        ? submission.createdAt
+        : new Date(submission.createdAt as unknown as string);
+
+      if (!stat.lastSubmissionAt || createdAt > stat.lastSubmissionAt) {
+        stat.lastSubmissionAt = createdAt;
+      }
+    }
+
+    const projectStats: ProjectStatsItem[] = Array.from(statsByProjectId.values()).map((item) => ({
+      projectId: item.projectId,
+      title: item.title,
+      slug: item.slug,
+      status: item.status,
+      totalSubmissions: item.totalSubmissions,
+      lastSubmissionAt: item.lastSubmissionAt ? item.lastSubmissionAt.toISOString() : null,
+    }));
+
+    const summaryStats: SummaryStats = {
+      totalProjects,
+      totalSubmissions,
+      todaySubmissions,
+      last7DaysSubmissions,
+    };
+
+    // 일별 전체 제출 수를 집계해 그래프용 데이터로 변환한다.
+    const countsByDate = new Map<string, number>();
+
+    for (const submission of submissions) {
+      const createdAt = submission.createdAt instanceof Date
+        ? submission.createdAt
+        : new Date(submission.createdAt as unknown as string);
+
+      const dateKey = createdAt.toISOString().slice(0, 10); // YYYY-MM-DD
+      const prev = countsByDate.get(dateKey) ?? 0;
+      countsByDate.set(dateKey, prev + 1);
+    }
+
+    const dailySubmissions: DailySubmissionItem[] = Array.from(countsByDate.entries())
+      .map(([date, count]) => ({ date, count }))
+      .sort((a, b) => a.date.localeCompare(b.date));
+
+    return NextResponse.json(
+      {
+        summaryStats,
+        projectStats,
+        dailySubmissions,
+      },
+      { status: 200 },
+    );
+  } catch (error: any) {
+    return NextResponse.json(
+      {
+        message: "대시보드 데이터를 계산하는 중 오류가 발생했습니다.",
+        error: error?.message,
+      },
+      { status: 500 },
+    );
+  }
+}

src/app/dashboard/page.tsx

@@ -0,0 +1,345 @@
+"use client";
+
+import { useEffect, useState } from "react";
+import { useRouter } from "next/navigation";
+import Link from "next/link";
+import { FolderKanban, LayoutDashboard, ListChecks, SunMoon } from "lucide-react";
+
+// 대시보드 페이지 (/dashboard)
+// - /api/dashboard/overview 에서 요약/프로젝트별 통계를 가져와 카드 형태로 렌더링한다.
+// - 비로그인(401) 응답 시 로그인 페이지로 리다이렉트하고 에러 메시지를 표시한다.
+
+interface SummaryStats {
+  totalProjects: number;
+  totalSubmissions: number;
+  todaySubmissions: number;
+  last7DaysSubmissions: number;
+}
+
+interface DailySubmissionItem {
+  // 일별 제출 수 그래프를 위한 집계 데이터
+  date: string; // YYYY-MM-DD
+  count: number;
+}
+
+interface ProjectStatsItem {
+  projectId: string;
+  title: string;
+  slug: string;
+  status: string;
+  totalSubmissions: number;
+  lastSubmissionAt: string | null;
+}
+
+type PageStatus = "idle" | "loading" | "error";
+
+export default function DashboardPage() {
+  const router = useRouter();
+
+  const [summary, setSummary] = useState<SummaryStats | null>(null);
+  const [projects, setProjects] = useState<ProjectStatsItem[]>([]);
+  const [dailySubmissions, setDailySubmissions] = useState<DailySubmissionItem[]>([]);
+  const [status, setStatus] = useState<PageStatus>("idle");
+  const [errorMessage, setErrorMessage] = useState<string | null>(null);
+  const [isMenuOpen, setIsMenuOpen] = useState(false);
+
+  // 마운트 시 대시보드 개요 데이터를 불러온다.
+  useEffect(() => {
+    let cancelled = false;
+
+    const load = async () => {
+      try {
+        setStatus("loading");
+        setErrorMessage(null);
+
+        const res = await fetch("/api/dashboard/overview");
+
+        if (!res.ok) {
+          if (cancelled) return;
+
+          if (res.status === 401) {
+            setStatus("error");
+            setErrorMessage("대시보드를 보려면 로그인이 필요합니다. 다시 로그인해 주세요.");
+            router.push("/login");
+            return;
+          }
+
+          setStatus("error");
+          setErrorMessage("대시보드 데이터를 불러오는 중 오류가 발생했습니다. 잠시 후 다시 시도해 주세요.");
+          return;
+        }
+
+        const data = (await res.json()) as {
+          summaryStats: SummaryStats;
+          projectStats: ProjectStatsItem[];
+          dailySubmissions?: DailySubmissionItem[];
+        };
+
+        if (cancelled) return;
+
+        setSummary(data.summaryStats ?? null);
+        setProjects(Array.isArray(data.projectStats) ? data.projectStats : []);
+        setDailySubmissions(
+          Array.isArray(data.dailySubmissions) ? data.dailySubmissions : [],
+        );
+        setStatus("idle");
+        setErrorMessage(null);
+      } catch {
+        if (!cancelled) {
+          setStatus("error");
+          setErrorMessage(
+            "대시보드 데이터를 불러오는 중 오류가 발생했습니다. 잠시 후 다시 시도해 주세요.",
+          );
+        }
+      }
+    };
+
+    void load();
+
+    return () => {
+      cancelled = true;
+    };
+  }, [router]);
+
+  const safeSummary: SummaryStats =
+    summary ?? {
+      totalProjects: 0,
+      totalSubmissions: 0,
+      todaySubmissions: 0,
+      last7DaysSubmissions: 0,
+    };
+
+  const handleLogout = async () => {
+    try {
+      const res = await fetch("/api/auth/logout", {
+        method: "POST",
+      });
+
+      if (!res.ok) {
+        return;
+      }
+
+      router.push("/login");
+    } catch {
+    }
+  };
+
+  const handleToggleTheme = () => {
+    if (typeof document === "undefined") {
+      return;
+    }
+
+    const root = document.documentElement;
+    if (!root) {
+      return;
+    }
+
+    root.classList.toggle("dark");
+  };
+
+  return (
+    <main className="min-h-screen flex flex-col bg-slate-100 text-slate-900 dark:bg-slate-950 dark:text-slate-50">
+      <header className="border-b border-slate-200 px-6 py-4 flex items-center justify-between bg-white/80 backdrop-blur dark:border-slate-800 dark:bg-slate-950/80">
+        <div>
+          <h1 className="text-2xl font-bold tracking-tight">대시보드</h1>
+          <p className="text-sm text-slate-500 mt-1 dark:text-slate-400">프로젝트와 폼 제출 현황을 한눈에 확인할 수 있는 요약 화면입니다.</p>
+        </div>
+        <div className="flex items-center gap-3 text-sm">
+          <nav className="inline-flex items-center gap-1 rounded-full border border-slate-200 bg-white/80 px-1.5 py-1 shadow-sm dark:border-slate-700 dark:bg-slate-900/80">
+            <Link
+              href="/dashboard"
+              aria-current="page"
+              className="inline-flex items-center gap-1 px-3 py-1.5 rounded-full text-sm font-semibold bg-sky-600 text-white shadow-sm hover:bg-sky-700"
+            >
+              <LayoutDashboard className="w-4 h-4" aria-hidden="true" />
+              <span>대시보드</span>
+            </Link>
+            <Link
+              href="/projects"
+              className="inline-flex items-center gap-1 px-3 py-1.5 rounded-full text-sm font-medium text-slate-700 hover:bg-slate-100 hover:text-sky-700 dark:text-slate-200 dark:hover:bg-slate-800 dark:hover:text-sky-200"
+            >
+              <FolderKanban className="w-4 h-4" aria-hidden="true" />
+              <span>프로젝트 목록</span>
+            </Link>
+            <Link
+              href="/projects/submissions"
+              className="inline-flex items-center gap-1 px-3 py-1.5 rounded-full text-sm font-medium text-emerald-700 hover:bg-emerald-50 hover:text-emerald-800 dark:text-emerald-200 dark:hover:bg-emerald-900/60 dark:hover:text-emerald-100"
+            >
+              <ListChecks className="w-4 h-4" aria-hidden="true" />
+              <span>전체 제출 내역</span>
+            </Link>
+          </nav>
+          <button
+            type="button"
+            className="inline-flex items-center gap-1 rounded-full border border-slate-300 bg-white/80 px-3 py-1.5 text-xs font-medium text-slate-700 hover:bg-slate-100 dark:border-slate-700 dark:bg-slate-900 dark:text-slate-200 dark:hover:bg-slate-800"
+            onClick={handleToggleTheme}
+          >
+            <SunMoon className="w-4 h-4" aria-hidden="true" />
+            <span>테마 전환</span>
+          </button>
+          <div className="relative">
+            <button
+              type="button"
+              className="inline-flex items-center gap-1 rounded-full border border-slate-300 bg-white/80 px-3 py-1.5 text-xs font-medium text-slate-700 hover:bg-slate-100 dark:border-slate-700 dark:bg-slate-900 dark:text-slate-200 dark:hover:bg-slate-800"
+              onClick={() => {
+                setIsMenuOpen((prev) => !prev);
+              }}
+            >
+              메뉴
+            </button>
+            {isMenuOpen && (
+              <div className="absolute right-0 mt-1 w-32 rounded border border-slate-200 bg-white shadow-lg z-20 dark:border-slate-700 dark:bg-slate-900/95">
+                <button
+                  type="button"
+                  className="w-full px-3 py-2 text-left text-xs text-slate-700 hover:bg-slate-100 dark:text-slate-200 dark:hover:bg-slate-800"
+                  onClick={() => {
+                    setIsMenuOpen(false);
+                    void handleLogout();
+                  }}
+                >
+                  로그아웃
+                </button>
+              </div>
+            )}
+          </div>
+        </div>
+      </header>
+
+      <section className="flex-1 px-6 py-4 space-y-4 overflow-auto bg-slate-50/60 dark:bg-transparent">
+        {status === "error" && errorMessage && (
+          <p className="text-xs text-red-500 dark:text-red-300">{errorMessage}</p>
+        )}
+
+        {status === "loading" && (
+          <p className="text-xs text-slate-400">대시보드 데이터를 불러오는 중입니다...</p>
+        )}
+
+        {/* 상단 요약 위젯 영역 */}
+        <div className="grid grid-cols-2 md:grid-cols-4 gap-3 text-xs">
+          <div
+            data-testid="dashboard-summary-total-projects"
+            className="rounded-xl border border-slate-200 bg-white/80 px-4 py-3 flex flex-col gap-1 shadow-sm dark:border-slate-800 dark:bg-slate-900/70"
+          >
+            <span className="text-[11px] font-medium text-slate-500 dark:text-slate-400">프로젝트 수</span>
+            <span className="text-2xl font-bold tracking-tight">{safeSummary.totalProjects}</span>
+          </div>
+
+          <div
+            data-testid="dashboard-summary-total-submissions"
+            className="rounded-xl border border-slate-200 bg-white/80 px-4 py-3 flex flex-col gap-1 shadow-sm dark:border-slate-800 dark:bg-slate-900/70"
+          >
+            <span className="text-[11px] font-medium text-slate-500 dark:text-slate-400">전체 폼 제출 수</span>
+            <span className="text-2xl font-bold tracking-tight">{safeSummary.totalSubmissions}</span>
+          </div>
+
+          <div
+            data-testid="dashboard-summary-today-submissions"
+            className="rounded-xl border border-slate-200 bg-white/80 px-4 py-3 flex flex-col gap-1 shadow-sm dark:border-slate-800 dark:bg-slate-900/70"
+          >
+            <span className="text-[11px] font-medium text-slate-500 dark:text-slate-400">오늘 제출 수</span>
+            <span className="text-2xl font-bold tracking-tight">{safeSummary.todaySubmissions}</span>
+          </div>
+
+          <div
+            data-testid="dashboard-summary-last7days-submissions"
+            className="rounded-xl border border-slate-200 bg-white/80 px-4 py-3 flex flex-col gap-1 shadow-sm dark:border-slate-800 dark:bg-slate-900/70"
+          >
+            <span className="text-[11px] font-medium text-slate-500 dark:text-slate-400">최근 7일 제출 수</span>
+            <span className="text-2xl font-bold tracking-tight">{safeSummary.last7DaysSubmissions}</span>
+          </div>
+        </div>
+
+        {/* 일별 제출 수 간단 그래프 영역 */}
+        <div
+          data-testid="dashboard-daily-chart"
+          className="mt-2 rounded-xl border border-slate-200 bg-white/80 px-4 py-3 shadow-sm dark:border-slate-800 dark:bg-slate-900/70"
+        >
+          <div className="flex items-baseline justify-between mb-2">
+            <h2 className="text-sm font-semibold text-slate-800 dark:text-slate-200">최근 제출 추이 (일별)</h2>
+            <span className="text-[10px] text-slate-500 dark:text-slate-500">최근 활동이 있는 날짜만 표시됩니다.</span>
+          </div>
+
+          {dailySubmissions.length === 0 ? (
+            <p className="text-[11px] text-slate-500 dark:text-slate-400">아직 일별 제출 내역이 없습니다.</p>
+          ) : (
+            <div className="flex items-end gap-2 text-[10px]">
+              {dailySubmissions.map((item) => (
+                <div
+                  key={item.date}
+                  data-testid="dashboard-daily-chart-bar"
+                  className="flex flex-col items-center gap-1"
+                >
+                  <div
+                    className="w-6 rounded-t bg-emerald-500/80"
+                    style={{ height: `${Math.max(8, item.count * 12)}px` }}
+                  />
+                  <span className="text-slate-700 font-semibold dark:text-slate-300">{item.count}</span>
+                  <span className="text-slate-500 dark:text-slate-500">{item.date}</span>
+                </div>
+              ))}
+            </div>
+          )}
+        </div>
+
+        {/* 프로젝트 카드 리스트 영역 */}
+        <div className="mt-2">
+          <h2 className="text-base font-semibold mb-2 text-slate-800 dark:text-slate-100">프로젝트별 제출 현황</h2>
+
+          {projects.length === 0 && status === "idle" && !errorMessage && (
+            <p className="text-xs text-slate-500 dark:text-slate-400">아직 생성된 프로젝트가 없거나 제출 내역이 없습니다.</p>
+          )}
+
+          {projects.length > 0 && (
+            <div className="grid gap-3 md:grid-cols-2 lg:grid-cols-3">
+              {projects.map((project) => {
+                const lastSubmitted = project.lastSubmissionAt
+                  ? new Date(project.lastSubmissionAt).toLocaleString()
+                  : "제출 내역 없음";
+
+                return (
+                  <article
+                    key={project.projectId}
+                    data-testid="dashboard-project-card"
+                    className="rounded-xl border border-slate-200 bg-white/80 px-4 py-3 flex flex-col gap-1 shadow-sm dark:border-slate-800 dark:bg-slate-900/70"
+                  >
+                    <div className="flex items-baseline justify-between gap-2">
+                      <div>
+                        <h3 className="text-sm font-semibold text-slate-900 dark:text-slate-50">{project.title}</h3>
+                        <p className="text-[11px] text-slate-500 font-mono dark:text-slate-400">{project.slug}</p>
+                      </div>
+                      <span className="text-[10px] px-2 py-0.5 rounded-full border border-slate-300 bg-slate-50 text-slate-700 dark:border-slate-700 dark:bg-transparent dark:text-slate-300">
+                        {project.status}
+                      </span>
+                    </div>
+
+                    <div className="mt-1 flex items-center justify-between text-[11px] text-slate-700 dark:text-slate-300">
+                      <span>
+                        총 제출 <span className="font-semibold">{project.totalSubmissions}</span>건
+                      </span>
+                      <span className="text-slate-500 dark:text-slate-400">최근 제출: {lastSubmitted}</span>
+                    </div>
+
+                    <div className="mt-2 flex items-center gap-2 text-[11px]">
+                      <Link
+                        href={`/projects/${encodeURIComponent(project.slug)}/submissions`}
+                        className="text-emerald-700 hover:text-emerald-900 underline-offset-2 hover:underline dark:text-emerald-300 dark:hover:text-emerald-100"
+                      >
+                        폼 제출 내역 보기
+                      </Link>
+                      <Link
+                        href={`/p/${encodeURIComponent(project.slug)}`}
+                        className="text-sky-700 hover:text-sky-900 underline-offset-2 hover:underline dark:text-sky-300 dark:hover:text-sky-200"
+                      >
+                        퍼블릭 페이지 열기
+                      </Link>
+                    </div>
+                  </article>
+                );
+              })}
+            </div>
+          )}
+        </div>
+      </section>
+    </main>
+  );
+}

src/app/layout.tsx

@@ -10,7 +10,7 @@ export const metadata = {
 export default function RootLayout({ children }: { children: ReactNode }) {
   return (
     <html lang="ko" suppressHydrationWarning>
-      <body className="min-h-screen bg-slate-950 text-slate-50">
+      <body className="min-h-screen bg-slate-50 text-slate-900 dark:bg-slate-950 dark:text-slate-50">
         {children}
       </body>
     </html>

src/app/login/page.tsx

@@ -23,7 +23,7 @@ export default function LoginPage() {
       try {
         const res = await fetch("/api/auth/me");
         if (!cancelled && res.ok) {
-          router.push("/projects");
+          router.push("/dashboard");
         }
       } catch {
         // ignore
@@ -61,8 +61,8 @@ export default function LoginPage() {
         return;
       }
 
-      // 성공 시에는 /projects 로 이동한다.
-      router.push("/projects");
+      // 성공 시에는 /dashboard 로 이동한다.
+      router.push("/dashboard");
     } catch {
       setError("네트워크 오류가 발생했습니다. 잠시 후 다시 시도해 주세요.");
     } finally {

src/app/page.tsx

@@ -1,12 +1,19 @@
+"use client";
+
+import { useEffect } from "react";
+import { useRouter } from "next/navigation";
+
 export default function HomePage() {
+  const router = useRouter();
+
+  useEffect(() => {
+    // 메인 페이지 진입 시 대시보드로 안내한다.
+    router.push("/dashboard");
+  }, [router]);
+
   return (
     <main className="flex min-h-screen items-center justify-center">
-      <div className="text-center space-y-4">
-        <h1 className="text-3xl font-bold">Page Builder MVP</h1>
-        <p className="text-sm text-slate-400">
-          에디터와 블록 시스템을 이 위에서 TDD로 구현합니다.
-        </p>
-      </div>
+      <p className="text-sm text-slate-400">대시보드로 이동 중입니다...</p>
     </main>
   );
 }

src/app/projects/page.tsx

@@ -11,6 +11,9 @@ import {
   ListChecks,
   ChevronLeft,
   ChevronRight,
+  LayoutDashboard,
+  FolderKanban,
+  SunMoon,
 } from "lucide-react";
 
 interface ProjectListItem {
@@ -29,6 +32,7 @@ export default function ProjectsPage() {
   const [errorMessage, setErrorMessage] = useState<string | null>(null);
   const [selectedSlugs, setSelectedSlugs] = useState<string[]>([]);
   const [currentPage, setCurrentPage] = useState(1);
+  const [isMenuOpen, setIsMenuOpen] = useState(false);
   const pageSize = 10;
 
   useEffect(() => {
@@ -179,7 +183,7 @@ export default function ProjectsPage() {
           window.localStorage.removeItem(`pb:autosave:${slug}`);
         }
       }
-
+  
       if (okSlugs.length !== slugs.length) {
         setStatus("error");
         setErrorMessage(
@@ -195,51 +199,101 @@ export default function ProjectsPage() {
     }
   };
 
+  const handleToggleTheme = () => {
+    if (typeof document === "undefined") {
+      return;
+    }
+
+    const root = document.documentElement;
+    if (!root) {
+      return;
+    }
+
+    root.classList.toggle("dark");
+  };
+
   return (
-    <main className="min-h-screen flex flex-col bg-slate-950 text-slate-50">
-      <header className="border-b border-slate-800 px-6 py-4 flex items-center justify-between bg-slate-950/80 backdrop-blur">
+    <main className="min-h-screen flex flex-col bg-slate-100 text-slate-900 dark:bg-slate-950 dark:text-slate-50">
+      <header className="border-b border-slate-200 px-6 py-4 flex items-center justify-between bg-white/80 backdrop-blur dark:border-slate-800 dark:bg-slate-950/80">
         <div>
-          <h1 className="text-xl font-semibold">프로젝트 목록</h1>
-          <p className="text-xs text-slate-400">저장된 프로젝트들을 한 눈에 볼 수 있는 목록</p>
+          <h1 className="text-2xl font-bold tracking-tight">프로젝트 목록</h1>
+          <p className="text-sm text-slate-500 dark:text-slate-400">저장된 프로젝트들을 한 눈에 볼 수 있는 목록</p>
         </div>
-        <div className="flex items-center gap-2 text-xs">
+        <div className="flex items-center gap-3 text-sm">
+          <nav className="inline-flex items-center gap-1 rounded-full border border-slate-200 bg-white/80 px-1.5 py-1 shadow-sm dark:border-slate-700 dark:bg-slate-900/80">
+            <Link
+              href="/dashboard"
+              className="inline-flex items-center gap-1 px-3 py-1.5 rounded-full text-sm font-medium text-slate-700 hover:bg-slate-100 hover:text-sky-700 dark:text-slate-200 dark:hover:bg-slate-800 dark:hover:text-sky-200"
+            >
+              <LayoutDashboard className="w-4 h-4" aria-hidden="true" />
+              <span>대시보드</span>
+            </Link>
+            <Link
+              href="/projects"
+              aria-current="page"
+              className="inline-flex items-center gap-1 px-3 py-1.5 rounded-full text-sm font-semibold bg-sky-600 text-white shadow-sm hover:bg-sky-700"
+            >
+              <FolderKanban className="w-4 h-4" aria-hidden="true" />
+              <span>프로젝트 목록</span>
+            </Link>
+            <Link
+              href="/projects/submissions"
+              className="inline-flex items-center gap-1 px-3 py-1.5 rounded-full text-sm font-medium text-emerald-700 hover:bg-emerald-50 hover:text-emerald-800 dark:text-emerald-200 dark:hover:bg-emerald-900/60 dark:hover:text-emerald-100"
+            >
+              <ListChecks className="w-4 h-4" aria-hidden="true" />
+              <span>전체 제출 내역</span>
+            </Link>
+          </nav>
           <button
             type="button"
-            className="inline-flex items-center gap-1 rounded border border-slate-700 px-3 py-1 text-slate-200 hover:bg-slate-900"
-            onClick={() => {
-              void handleLogout();
-            }}
+            className="inline-flex items-center gap-1 rounded-full border border-slate-300 bg-white/80 px-3 py-1.5 text-xs font-medium text-slate-700 hover:bg-slate-100 dark:border-slate-700 dark:bg-slate-900 dark:text-slate-200 dark:hover:bg-slate-800"
+            onClick={handleToggleTheme}
           >
-            로그아웃
+            <SunMoon className="w-4 h-4" aria-hidden="true" />
+            <span>테마 전환</span>
           </button>
-          <Link
-            href="/projects/submissions"
-            className="inline-flex items-center gap-1 rounded border border-emerald-700 bg-emerald-950 px-3 py-1 text-emerald-100 hover:bg-emerald-900 shadow-sm"
-          >
-            <ListChecks className="w-4 h-4" aria-hidden="true" />
-            <span>전체 제출 내역</span>
-          </Link>
-          <Link
-            href="/editor?new=1"
-            className="inline-flex items-center gap-1 rounded border border-sky-700 bg-sky-950 px-3 py-1 text-sky-100 hover:bg-sky-900 shadow-sm"
-          >
-            <FilePlus2 className="w-4 h-4" aria-hidden="true" />
-            <span>새 프로젝트 만들기</span>
-          </Link>
+          <div className="relative">
+            <button
+              type="button"
+              className="inline-flex items-center gap-1 rounded-full border border-slate-300 bg-white/80 px-3 py-1.5 text-xs font-medium text-slate-700 hover:bg-slate-100 dark:border-slate-700 dark:bg-slate-900 dark:text-slate-200 dark:hover:bg-slate-800"
+              onClick={() => {
+                setIsMenuOpen((prev) => !prev);
+              }}
+            >
+              메뉴
+            </button>
+            {isMenuOpen && (
+              <div className="absolute right-0 mt-1 w-32 rounded border border-slate-200 bg-white shadow-lg z-20 dark:border-slate-700 dark:bg-slate-900/95">
+                <button
+                  type="button"
+                  className="w-full px-3 py-2 text-left text-xs text-slate-700 hover:bg-slate-100 dark:text-slate-200 dark:hover:bg-slate-800"
+                  onClick={() => {
+                    setIsMenuOpen(false);
+                    void handleLogout();
+                  }}
+                >
+                  로그아웃
+                </button>
+              </div>
+            )}
+          </div>
         </div>
       </header>
-      <section className="flex-1 px-6 py-4 overflow-auto">
+      <section className="flex-1 px-6 py-4 overflow-auto bg-slate-50/60 dark:bg-transparent">
         {status === "error" && (
-          <p className="text-xs text-red-300 mb-3">
+          <p className="text-xs text-red-500 mb-3 dark:text-red-300">
             {errorMessage ?? "프로젝트 목록을 불러오는 중 오류가 발생했습니다. 잠시 후 다시 시도해 주세요."}
           </p>
         )}
         {projects.length === 0 && status === "idle" && (
-          <p className="text-xs text-slate-400">아직 저장된 프로젝트가 없습니다. 에디터에서 프로젝트를 저장해 보세요.</p>
+          <p className="text-xs text-slate-500 dark:text-slate-400">아직 저장된 프로젝트가 없습니다. 에디터에서 프로젝트를 저장해 보세요.</p>
         )}
         {projects.length > 0 && (
           <>
-            <div className="flex items-center justify-between mb-2 text-[11px] text-slate-300">
+            <div
+              data-testid="projects-toolbar"
+              className="flex items-center justify-between mb-2 text-[11px] text-slate-300"
+            >
               <div className="inline-flex items-center gap-2">
                 <span className="inline-flex items-center gap-1 px-2 py-1 rounded-full bg-slate-900/70 border border-slate-700">
                   <ListChecks className="w-3 h-3 text-slate-400" aria-hidden="true" />
@@ -248,17 +302,26 @@ export default function ProjectsPage() {
                   </span>
                 </span>
               </div>
-              <button
-                type="button"
-                className="inline-flex items-center gap-1 rounded border border-red-700 px-2 py-1 text-red-200 hover:bg-red-900/40 disabled:opacity-40 disabled:cursor-not-allowed"
-                disabled={selectedSlugs.length === 0}
-                onClick={() => {
-                  void handleBulkDelete();
-                }}
-              >
-                <Trash2 className="w-3 h-3" aria-hidden="true" />
-                <span>선택 삭제</span>
-              </button>
+              <div className="flex items-center gap-2">
+                <button
+                  type="button"
+                  className="inline-flex items-center gap-1 rounded border border-red-700 px-2 py-1 text-red-200 hover:bg-red-900/40 disabled:opacity-40 disabled:cursor-not-allowed"
+                  disabled={selectedSlugs.length === 0}
+                  onClick={() => {
+                    void handleBulkDelete();
+                  }}
+                >
+                  <Trash2 className="w-3 h-3" aria-hidden="true" />
+                  <span>선택 삭제</span>
+                </button>
+                <Link
+                  href="/editor?new=1"
+                  className="inline-flex items-center gap-1 rounded border border-sky-700 bg-sky-950 px-2 py-1 text-sky-100 hover:bg-sky-900 shadow-sm"
+                >
+                  <FilePlus2 className="w-3 h-3" aria-hidden="true" />
+                  <span>새 프로젝트 만들기</span>
+                </Link>
+              </div>
             </div>
             <table className="w-full text-xs text-left border-collapse mt-2">
               <thead>

src/app/projects/submissions/page.tsx

@@ -2,6 +2,8 @@
 
 import { useEffect, useState } from "react";
 import { useRouter } from "next/navigation";
+import Link from "next/link";
+import { FolderKanban, LayoutDashboard, ListChecks, SunMoon } from "lucide-react";
 
 interface SubmissionItem {
   id: string;
@@ -18,6 +20,7 @@ export default function AllProjectSubmissionsPage() {
   const [submissions, setSubmissions] = useState<SubmissionItem[]>([]);
   const [status, setStatus] = useState<PageStatus>("idle");
   const [errorMessage, setErrorMessage] = useState<string | null>(null);
+  const [isMenuOpen, setIsMenuOpen] = useState(false);
 
   useEffect(() => {
     let cancelled = false;
@@ -82,39 +85,113 @@ export default function AllProjectSubmissionsPage() {
       .join("\n");
   };
 
+  const handleLogout = async () => {
+    try {
+      const res = await fetch("/api/auth/logout", {
+        method: "POST",
+      });
+
+      if (!res.ok) {
+        setErrorMessage("로그아웃 중 오류가 발생했습니다. 잠시 후 다시 시도해 주세요.");
+        return;
+      }
+
+      router.push("/login");
+    } catch {
+      setErrorMessage("로그아웃 중 오류가 발생했습니다. 잠시 후 다시 시도해 주세요.");
+    }
+  };
+
   return (
-    <main className="min-h-screen flex flex-col bg-slate-950 text-slate-50">
-      <header className="border-b border-slate-800 px-6 py-4 flex items-center justify-between bg-slate-950/80 backdrop-blur">
+    <main className="min-h-screen flex flex-col bg-slate-100 text-slate-900 dark:bg-slate-950 dark:text-slate-50">
+      <header className="border-b border-slate-200 px-6 py-4 flex items-center justify-between bg-white/80 backdrop-blur dark:border-slate-800 dark:bg-slate-950/80">
         <div>
-          <h1 className="text-xl font-semibold">전체 폼 제출 내역</h1>
-          <p className="text-xs text-slate-400">로그인한 계정의 모든 프로젝트에 대한 폼 제출 데이터를 확인할 수 있습니다.</p>
+          <h1 className="text-2xl font-bold tracking-tight">전체 폼 제출 내역</h1>
+          <p className="text-sm text-slate-500 dark:text-slate-400">로그인한 계정의 모든 프로젝트에 대한 폼 제출 데이터를 확인할 수 있습니다.</p>
         </div>
-        <div className="text-xs text-slate-300 flex flex-col items-end gap-1">
-          <a
-            href="/projects"
-            role="link"
-            className="text-[11px] text-sky-400 hover:text-sky-300 underline-offset-2 hover:underline"
-            onClick={(event) => {
-              event.preventDefault();
-              router.push("/projects");
+        <div className="flex items-center gap-3 text-sm">
+          <nav className="inline-flex items-center gap-1 rounded-full border border-slate-200 bg-white/80 px-1.5 py-1 shadow-sm dark:border-slate-700 dark:bg-slate-900/80">
+            <Link
+              href="/dashboard"
+              className="inline-flex items-center gap-1 px-3 py-1.5 rounded-full text-sm font-medium text-slate-700 hover:bg-slate-100 hover:text-sky-700 dark:text-slate-200 dark:hover:bg-slate-800 dark:hover:text-sky-200"
+            >
+              <LayoutDashboard className="w-4 h-4" aria-hidden="true" />
+              <span>대시보드</span>
+            </Link>
+            <Link
+              href="/projects"
+              className="inline-flex items-center gap-1 px-3 py-1.5 rounded-full text-sm font-medium text-slate-700 hover:bg-slate-100 hover:text-sky-700 dark:text-slate-200 dark:hover:bg-slate-800 dark:hover:text-sky-200"
+            >
+              <FolderKanban className="w-4 h-4" aria-hidden="true" />
+              <span>프로젝트 목록</span>
+            </Link>
+            <Link
+              href="/projects/submissions"
+              aria-current="page"
+              className="inline-flex items-center gap-1 px-3 py-1.5 rounded-full text-sm font-semibold bg-emerald-600 text-white shadow-sm hover:bg-emerald-700"
+            >
+              <ListChecks className="w-4 h-4" aria-hidden="true" />
+              <span>전체 제출 내역</span>
+            </Link>
+          </nav>
+          <button
+            type="button"
+            className="inline-flex items-center gap-1 rounded-full border border-slate-300 bg-white/80 px-3 py-1.5 text-xs font-medium text-slate-700 hover:bg-slate-100 dark:border-slate-700 dark:bg-slate-900 dark:text-slate-200 dark:hover:bg-slate-800"
+            onClick={() => {
+              if (typeof document === "undefined") {
+                return;
+              }
+
+              const root = document.documentElement;
+              if (!root) {
+                return;
+              }
+
+              root.classList.toggle("dark");
             }}
           >
-            프로젝트 목록
-          </a>
+            <SunMoon className="w-4 h-4" aria-hidden="true" />
+            <span>테마 전환</span>
+          </button>
+          <div className="relative">
+            <button
+              type="button"
+              className="inline-flex items-center gap-1 rounded-full border border-slate-300 bg-white/80 px-3 py-1.5 text-xs font-medium text-slate-700 hover:bg-slate-100 dark:border-slate-700 dark:bg-slate-900 dark:text-slate-200 dark:hover:bg-slate-800"
+              onClick={() => {
+                setIsMenuOpen((prev) => !prev);
+              }}
+            >
+              메뉴
+            </button>
+            {isMenuOpen && (
+              <div className="absolute right-0 mt-1 w-32 rounded border border-slate-200 bg-white shadow-lg z-20 dark:border-slate-700 dark:bg-slate-900/95">
+                <button
+                  type="button"
+                  className="w-full px-3 py-2 text-left text-xs text-slate-700 hover:bg-slate-100 dark:text-slate-200 dark:hover:bg-slate-800"
+                  onClick={() => {
+                    setIsMenuOpen(false);
+                    void handleLogout();
+                  }}
+                >
+                  로그아웃
+                </button>
+              </div>
+            )}
+          </div>
         </div>
       </header>
 
-      <section className="flex-1 px-6 py-4 overflow-auto">
+      <section className="flex-1 px-6 py-4 overflow-auto bg-slate-50/60 dark:bg-transparent">
         {status === "error" && errorMessage && (
-          <p className="text-xs text-red-300 mb-3">{errorMessage}</p>
+          <p className="text-xs text-red-500 mb-3 dark:text-red-300">{errorMessage}</p>
         )}
 
         {status === "loading" && (
-          <p className="text-xs text-slate-400 mb-3">폼 제출 내역을 불러오는 중입니다...</p>
+          <p className="text-xs text-slate-500 mb-3 dark:text-slate-400">폼 제출 내역을 불러오는 중입니다...</p>
         )}
 
         {submissions.length === 0 && status === "idle" && !errorMessage && (
-          <p className="text-xs text-slate-400">아직 수집된 폼 제출 내역이 없습니다.</p>
+          <p className="text-xs text-slate-500 dark:text-slate-400">아직 수집된 폼 제출 내역이 없습니다.</p>
         )}
 
         {submissions.length > 0 && (

src/app/signup/page.tsx

@@ -23,7 +23,7 @@ export default function SignupPage() {
       try {
         const res = await fetch("/api/auth/me");
         if (!cancelled && res.ok) {
-          router.push("/projects");
+          router.push("/dashboard");
         }
       } catch {
         // ignore
@@ -61,7 +61,7 @@ export default function SignupPage() {
         return;
       }
 
-      router.push("/projects");
+      router.push("/dashboard");
     } catch {
       setError("네트워크 오류가 발생했습니다. 잠시 후 다시 시도해 주세요.");
     } finally {