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/uploads/route.ts

@@ -0,0 +1,42 @@
+import { auth } from "@/lib/auth";
+import { writeFile, mkdir } from "fs/promises";
+import path from "path";
+import { randomUUID } from "crypto";
+
+const PIPELINE_ROOT =
+  process.env.PIPELINE_ROOT || path.join(process.cwd(), "pipeline");
+
+export async function POST(request: Request) {
+  const session = await auth();
+  if (!session) return new Response("Unauthorized", { status: 401 });
+
+  const formData = await request.formData();
+  const files = formData.getAll("files") as File[];
+
+  if (files.length === 0) {
+    return Response.json({ error: "No files provided" }, { status: 400 });
+  }
+
+  const screenshotsDir = path.join(PIPELINE_ROOT, "assets", "screenshots");
+  await mkdir(screenshotsDir, { recursive: true });
+
+  const uploaded: { fileName: string; path: string }[] = [];
+
+  for (const file of files) {
+    if (!file.type.startsWith("image/")) continue;
+
+    const ext = path.extname(file.name) || ".png";
+    const uniqueName = `${randomUUID()}${ext}`;
+    const filePath = path.join(screenshotsDir, uniqueName);
+
+    const buffer = Buffer.from(await file.arrayBuffer());
+    await writeFile(filePath, buffer);
+
+    uploaded.push({
+      fileName: file.name,
+      path: `assets/screenshots/${uniqueName}`,
+    });
+  }
+
+  return Response.json({ uploaded });
+}