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>

app/api/postiz/route.ts

@@ -0,0 +1,61 @@
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+import { pushToPostiz, getPostizIntegrations } from "@/lib/postiz";
+
+export async function GET() {
+  const session = await auth();
+  if (!session) return new Response("Unauthorized", { status: 401 });
+
+  try {
+    const integrations = await getPostizIntegrations();
+    return Response.json(integrations);
+  } catch (error) {
+    return Response.json(
+      { error: error instanceof Error ? error.message : "Failed to fetch integrations" },
+      { status: 500 }
+    );
+  }
+}
+
+export async function POST(request: Request) {
+  const session = await auth();
+  if (!session) return new Response("Unauthorized", { status: 401 });
+
+  const { assetIds, scheduledAt } = await request.json();
+
+  if (!assetIds?.length || !scheduledAt) {
+    return Response.json(
+      { error: "assetIds and scheduledAt required" },
+      { status: 400 }
+    );
+  }
+
+  const results = [];
+
+  for (const id of assetIds) {
+    const asset = await prisma.asset.findUnique({ where: { id } });
+    if (!asset) continue;
+
+    try {
+      const post = await pushToPostiz(asset, scheduledAt);
+
+      await prisma.asset.update({
+        where: { id },
+        data: {
+          status: "published",
+          postizPostId: post.id,
+        },
+      });
+
+      results.push({ id, status: "scheduled", postId: post.id });
+    } catch (error) {
+      results.push({
+        id,
+        status: "failed",
+        error: error instanceof Error ? error.message : "Unknown error",
+      });
+    }
+  }
+
+  return Response.json({ results });
+}