Initial commit of 001code-html Scratch frontend project.

Includes scratch-gui, scratch-vm, scratch-blocks, scratch-render, scratch-l10n, and deployment config.

Co-authored-by: Cursor <cursoragent@cursor.com>

scratch-vm/test/integration/tw_default_extension_url.js

@@ -0,0 +1,104 @@
+const {test} = require('tap');
+const VirtualMachine = require('../../src/virtual-machine');
+
+test('Loading project uses default extension URLs', t => {
+    t.plan(1);
+
+    const vm = new VirtualMachine();
+    const events = [];
+    vm.securityManager.canLoadExtensionFromProject = url => {
+        events.push(`canLoadExtensionFromProject ${url}`);
+        return true;
+    };
+    vm.extensionManager.loadExtensionURL = url => {
+        events.push(`loadExtensionURL ${url}`);
+        return Promise.resolve();
+    };
+
+    vm.loadProject({
+        targets: [
+            {
+                isStage: true,
+                name: 'Stage',
+                variables: {},
+                lists: {},
+                broadcasts: {},
+                blocks: {
+                    a: {
+                        opcode: 'text_clearText',
+                        next: null,
+                        parent: null,
+                        inputs: {},
+                        fields: {},
+                        shadow: false,
+                        topLevel: true,
+                        x: 203,
+                        y: 250
+                    },
+                    b: {
+                        opcode: 'pen_clear',
+                        next: null,
+                        parent: null,
+                        inputs: {},
+                        fields: {},
+                        shadow: false,
+                        topLevel: true,
+                        x: 203,
+                        y: 250
+                    },
+                    c: {
+                        opcode: 'griffpatch_doTick',
+                        next: null,
+                        parent: null,
+                        inputs: {},
+                        fields: {},
+                        shadow: false,
+                        topLevel: true,
+                        x: 203,
+                        y: 250
+                    }
+                },
+                comments: {},
+                currentCostume: 0,
+                costumes: [
+                    {
+                        assetId: 'cd21514d0531fdffb22204e0ec5ed84a',
+                        dataFormat: 'svg',
+                        md5ext: 'cd21514d0531fdffb22204e0ec5ed84a.svg',
+                        name: 'backdrop1',
+                        rotationCenterX: 240,
+                        rotationCenterY: 180
+                    }
+                ],
+                sounds: [],
+                volume: 100,
+                layerOrder: 0,
+                tempo: 60,
+                videoTransparency: 50,
+                videoState: 'on',
+                textToSpeechLanguage: null
+            }
+        ],
+        monitors: [],
+        extensions: [
+            // this list intentionally wrong to make sure we don't rely on its contents
+        ],
+        extensionURLs: {
+            griffpatch: 'https://example.com/box2d.js'
+        },
+        meta: {
+            semver: '3.0.0',
+            vm: '0.2.0',
+            agent: ''
+        }
+    }).then(() => {
+        t.same(events, [
+            'canLoadExtensionFromProject https://extensions.turbowarp.org/lab/text.js',
+            'loadExtensionURL https://extensions.turbowarp.org/lab/text.js',
+            'canLoadExtensionFromProject https://example.com/box2d.js',
+            'loadExtensionURL https://example.com/box2d.js'
+        ]);
+
+        t.end();
+    });
+});