fix(dev): proxy URL for https targets + disable auto-open by default

- Reconstruct target URL when the dev server path is /https://... (from
  window.fetch prefixing localhost); the old  + path form produced
  an invalid URL and broke all proxied plugin requests.
- Only open a browser when VITE_OPEN=true so missing xdg-open does not error.

Author: cursoragent

proxy.ts

@@ -57,7 +57,12 @@ const proxySettingMiddleware: Connect.NextHandleFunction = (req, res) => {
 };
 
 const proxyHandlerMiddle: Connect.NextHandleFunction = (req, res) => {
-  const rawUrl = 'https:' + req.url;
+  const path = req.url ?? '';
+  /** Browser fetch becomes GET /https://host/... — must not use `https:` + path (breaks URL). */
+  const rawUrl =
+    path.startsWith('/https://') || path.startsWith('/http://')
+      ? path.slice(1)
+      : `https:${path}`;
   if (req.headers['access-control-request-method']) {
     res.setHeader(
       'access-control-allow-methods',

vite.config.ts

@@ -31,6 +31,7 @@ export default defineConfig({
   },
   server: {
     port: 3000,
-    open: true,
+    // Opt-in: avoids `spawn xdg-open ENOENT` on minimal Linux; open http://localhost:3000 manually.
+    open: process.env.VITE_OPEN === '1' || process.env.VITE_OPEN === 'true',
   },
 });