Merge NetBird cloud edition into the dashboard (#674)

Brings the unified dashboard into the open-source repo. Premium features
ship in the open code, gated at runtime via NETBIRD_CLOUD and
NETBIRD_LICENSED, with upgrade prompts for unlicensed self-hosted
deployments. Adds the cloud-only feature areas (billing, integrations,
MSP, traffic events, notifications) and the Playwright e2e suite.

postbuild.js

@@ -0,0 +1,96 @@
+const { resolve, join } = require("path");
+const { createHash } = require("crypto");
+const {
+  readFileSync,
+  writeFileSync,
+  mkdirSync,
+  readdirSync,
+  statSync,
+} = require("fs");
+
+process.env.NODE_ENV = "production";
+const PLACEHOLDER = "NB_INLINE_SCRIPT_PLACEHOLDER";
+console.log("Starting post-build script to extract inline scripts...");
+
+// Function to find HTML files recursively
+function findHtmlFiles(dir) {
+  const files = [];
+  const entries = readdirSync(dir);
+
+  for (const entry of entries) {
+    const fullPath = join(dir, entry);
+    const stat = statSync(fullPath);
+
+    if (stat.isDirectory()) {
+      files.push(...findHtmlFiles(fullPath));
+    } else if (entry.endsWith(".html")) {
+      files.push(fullPath);
+    }
+  }
+
+  return files;
+}
+
+// For Next.js export output, the files are in the 'out' directory
+const baseDir = resolve("out");
+const htmlFiles = findHtmlFiles(baseDir);
+
+console.log(`Found ${htmlFiles.length} .html files to process`);
+
+// Ensure assets directory exists
+const assetsDir = `${baseDir}/assets`;
+mkdirSync(assetsDir, { recursive: true });
+
+htmlFiles.forEach((file) => {
+  // Read file contents
+  const contents = readFileSync(file, "utf8");
+  const scripts = [];
+
+  // Extract inline scripts
+  const newFile = contents.replace(
+    /<script(?![^>]*src)([^>]*)>(.+?)<\/script>/gs,
+    (match, attributes, scriptContent) => {
+      // Skip if script has src attribute (external script)
+      if (attributes.includes("src=")) {
+        return match;
+      }
+
+      const addPlaceholderString = scripts.length === 0;
+      const cleanedScript = scriptContent.trim();
+
+      if (cleanedScript) {
+        scripts.push(
+          `${cleanedScript}${cleanedScript.endsWith(";") ? "" : ";"}`,
+        );
+      }
+
+      return addPlaceholderString ? PLACEHOLDER : "";
+    },
+  );
+
+  // Early exit if no inline scripts found
+  if (!scripts.length) {
+    console.log(`No inline scripts found`);
+    return;
+  }
+
+  // Combine scripts and create hash
+  const chunk = scripts.join("\n");
+  const hash = createHash("md5").update(chunk).digest("hex").slice(0, 8);
+  const chunkFileName = `chunk.${hash}.js`;
+  const chunkPath = `${assetsDir}/${chunkFileName}`;
+
+  // Write the chunk file
+  writeFileSync(chunkPath, chunk, "utf8");
+
+  // Replace placeholder string with script tag
+  const updatedFile = newFile.replace(
+    PLACEHOLDER,
+    `<script src="/assets/${chunkFileName}" crossorigin=""></script>`,
+  );
+
+  // Write updated HTML file
+  writeFileSync(file, updatedFile, "utf8");
+});
+
+console.log("Post-build script completed successfully!");