feat: complete marketing command center with pipeline, UI, and asset generation

- Dashboard with campaign management, asset gallery, and publishing queue
- 7-agent pipeline: trend scout, research, scripts, ad creative, video, copy, distribution
- Campaign form with screenshot upload, goal picker, platform selection
- Campaign detail view with Details/Pipeline/Assets/Chat tabs
- Two-set image generation: Gemini AI (NanoBanana MCP) + Canvas Design posters
- Remotion video rendering with phone.png frame and real screenshot alignment
- honeyDue branding: blue #0079FF, orange #FF9400, Inter font, warm off-white
- Asset cards with source badges (Gemini/Canvas/Remotion/Playwright)
- Markdown/JSON render endpoint for viewing pipeline outputs as HTML
- Settings page with Tavily, Gemini, Postiz, Nextdoor integration management
- Claude Chat for campaign feedback loop with streaming SSE
- Postiz publishing modal with scheduling
- Auth with NextAuth credentials + JWT sessions
- SQLite via Prisma with better-sqlite3 adapter

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

lib/auth.ts

@@ -0,0 +1,31 @@
+import NextAuth from "next-auth";
+import Credentials from "next-auth/providers/credentials";
+import bcrypt from "bcryptjs";
+import { prisma } from "./prisma";
+
+export const { handlers, signIn, signOut, auth } = NextAuth({
+  providers: [
+    Credentials({
+      credentials: {
+        email: { label: "Email", type: "email" },
+        password: { label: "Password", type: "password" },
+      },
+      async authorize(credentials) {
+        const user = await prisma.user.findUnique({
+          where: { email: credentials.email as string },
+        });
+        if (!user) return null;
+        const valid = await bcrypt.compare(
+          credentials.password as string,
+          user.password
+        );
+        return valid ? { id: user.id, email: user.email, name: user.name } : null;
+      },
+    }),
+  ],
+  session: { strategy: "jwt" },
+  pages: {
+    signIn: "/login",
+  },
+  secret: process.env.NEXTAUTH_SECRET,
+});