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/campaigns/[id]/scan/route.ts

@@ -0,0 +1,30 @@
+import { auth } from "@/lib/auth";
+import { prisma } from "@/lib/prisma";
+import { scanOutputDirectory } from "@/lib/scanner";
+import path from "path";
+
+export async function POST(
+  _request: Request,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  const session = await auth();
+  if (!session) return new Response("Unauthorized", { status: 401 });
+
+  const { id } = await params;
+
+  const campaign = await prisma.campaign.findUnique({ where: { id } });
+  if (!campaign) {
+    return Response.json({ error: "Not found" }, { status: 404 });
+  }
+
+  if (!campaign.outputPath) {
+    return Response.json({ error: "No output path set" }, { status: 400 });
+  }
+
+  const pipelineRoot =
+    process.env.PIPELINE_ROOT || path.join(process.cwd(), "pipeline");
+
+  const result = await scanOutputDirectory(id, campaign.outputPath, pipelineRoot);
+
+  return Response.json(result);
+}