feat: Passwordless cross-device authentication

- Arkitektur: docs/auth/passwordless-architecture.md
- Backend: iom/quixzoom-auth-service/ (FastAPI + Redis)
- Webb: quixzoom-market-pages/se/login/ (QR-kod + polling)
- App: iom/quixzoom-app/src/features/auth/ (push + deep links)

Flöde: QR-kod → app-godkännande → webb-inloggad

landvex-admin-v2/node_modules/restructure/test/Buffer.js

@@ -0,0 +1,45 @@
+import assert from 'assert';
+import {Buffer as BufferT, uint8, DecodeStream, EncodeStream} from 'restructure';
+
+describe('Buffer', function() {
+  describe('decode', function() {
+    it('should decode', function() {
+      const buffer = new Uint8Array([0xab, 0xff]);
+      const buf = new BufferT(2);
+      assert.deepEqual(buf.fromBuffer(buffer), new Uint8Array([0xab, 0xff]));
+  });
+
+    it('should decode with parent key length', function() {
+      const stream = new DecodeStream(new Uint8Array([0xab, 0xff, 0x1f, 0xb6]));
+      const buf = new BufferT('len');
+      assert.deepEqual(buf.decode(stream, {len: 3}), new Uint8Array([0xab, 0xff, 0x1f]));
+      assert.deepEqual(buf.decode(stream, {len: 1}), new Uint8Array([0xb6]));
+  });
+});
+
+  describe('size', function() {
+    it('should return size', function() {
+      const buf = new BufferT(2);
+      assert.equal(buf.size(new Uint8Array([0xab, 0xff])), 2);
+    });
+
+    it('should use defined length if no value given', function() {
+      const array = new BufferT(10);
+      assert.equal(array.size(), 10);
+    });
+  });
+
+  describe('encode', function() {
+    it('should encode', function() {
+      const buf = new BufferT(2);
+      const buffer = buf.toBuffer(new Uint8Array([0xab, 0xff]));
+      assert.deepEqual(buffer, new Uint8Array([0xab, 0xff]));
+    });
+
+    it('should encode length before buffer', function() {
+      const buf = new BufferT(uint8);
+      const buffer = buf.toBuffer(new Uint8Array([0xab, 0xff]));
+      assert.deepEqual(buffer, new Uint8Array([2, 0xab, 0xff]));
+    });
+  });
+});