fix: serve buttplug locally in dev instead of Docker

Add a minimal Node.js static server (serve.mjs) to the buttplug package
that serves dist/ and wasm/ on port 8080 with correct MIME types.
Update dev:buttplug to use it instead of docker compose, avoiding a
full Rust/WASM Docker build on every dev start.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/buttplug/package.json

@@ -10,7 +10,8 @@
   ],
   "scripts": {
     "build": "vite build",
-    "build:wasm": "wasm-pack build --out-dir wasm --out-name index --target bundler --release"
+    "build:wasm": "wasm-pack build --out-dir wasm --out-name index --target bundler --release",
+    "serve": "node serve.mjs"
   },
   "dependencies": {
     "eventemitter3": "^5.0.4",

packages/buttplug/serve.mjs

@@ -0,0 +1,39 @@
+#!/usr/bin/env node
+// Simple static server for local development — serves dist/ and wasm/ on port 8080
+import http from "http";
+import fs from "fs";
+import path from "path";
+import { fileURLToPath } from "url";
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const PORT = process.env.PORT ?? 8080;
+
+const MIME = {
+  ".js": "application/javascript",
+  ".wasm": "application/wasm",
+  ".ts": "text/plain",
+  ".d.ts": "text/plain",
+};
+
+http
+  .createServer((req, res) => {
+    const filePath = path.join(__dirname, decodeURIComponent(req.url.split("?")[0]));
+    const ext = path.extname(filePath);
+
+    fs.readFile(filePath, (err, data) => {
+      if (err) {
+        res.writeHead(404);
+        res.end("Not found");
+        return;
+      }
+      res.writeHead(200, {
+        "Content-Type": MIME[ext] ?? "application/octet-stream",
+        "Cache-Control": "no-cache",
+        "Cross-Origin-Resource-Policy": "cross-origin",
+      });
+      res.end(data);
+    });
+  })
+  .listen(PORT, () => {
+    console.log(`[buttplug] serving on http://localhost:${PORT}`);
+  });