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-gui/test/__mocks__/audio-buffer-player.js

@@ -0,0 +1,15 @@
+export default class MockAudioBufferPlayer {
+    constructor (samples, sampleRate) {
+        this.samples = samples;
+        this.sampleRate = sampleRate;
+        this.buffer = {
+            getChannelData: jest.fn(() => samples),
+            sampleRate: sampleRate
+        };
+        this.play = jest.fn((trimStart, trimEnd, onUpdate) => {
+            this.onUpdate = onUpdate;
+        });
+        this.stop = jest.fn();
+        MockAudioBufferPlayer.instance = this;
+    }
+}

scratch-gui/test/__mocks__/audio-effects.js

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+export default class MockAudioEffects {
+    static get effectTypes () { // @todo can this be imported from the real file?
+        return {
+            ROBOT: 'robot',
+            REVERSE: 'reverse',
+            LOUDER: 'higher',
+            SOFTER: 'lower',
+            FASTER: 'faster',
+            SLOWER: 'slower',
+            ECHO: 'echo'
+        };
+    }
+    constructor (buffer, name) {
+        this.buffer = buffer;
+        this.name = name;
+        this.process = jest.fn(done => {
+            this._finishProcessing = renderedBuffer => {
+                done(renderedBuffer, 0, 1);
+                return new Promise(resolve => setTimeout(resolve));
+            };
+        });
+        MockAudioEffects.instance = this;
+    }
+}

scratch-gui/test/__mocks__/editor-msgs-mock.js

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+export default {
+    en: {}
+};

scratch-gui/test/__mocks__/fileMock.js

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+// __mocks__/fileMock.js
+
+module.exports = 'test-file-stub';

scratch-gui/test/__mocks__/styleMock.js

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+// __mocks__/styleMock.js
+
+module.exports = {};