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/unit/reducers/mode-reducer.test.js

@@ -0,0 +1,53 @@
+/* eslint-env jest */
+import modeReducer from '../../../src/reducers/mode';
+
+const SET_FULL_SCREEN = 'scratch-gui/mode/SET_FULL_SCREEN';
+const SET_PLAYER = 'scratch-gui/mode/SET_PLAYER';
+
+test('initialState', () => {
+    let defaultState;
+    /* modeReducer(state, action) */
+    expect(modeReducer(defaultState, {type: 'anything'})).toBeDefined();
+});
+
+test('set full screen mode', () => {
+    const previousState = {
+        showBranding: false,
+        isFullScreen: false,
+        isPlayerOnly: false,
+        hasEverEnteredEditor: true
+    };
+    const action = {
+        type: SET_FULL_SCREEN,
+        isFullScreen: true
+    };
+    const newState = {
+        showBranding: false,
+        isFullScreen: true,
+        isPlayerOnly: false,
+        hasEverEnteredEditor: true
+    };
+    /* modeReducer(state, action) */
+    expect(modeReducer(previousState, action)).toEqual(newState);
+});
+
+test('set player mode', () => {
+    const previousState = {
+        showBranding: false,
+        isFullScreen: false,
+        isPlayerOnly: false,
+        hasEverEnteredEditor: true
+    };
+    const action = {
+        type: SET_PLAYER,
+        isPlayerOnly: true
+    };
+    const newState = {
+        showBranding: false,
+        isFullScreen: false,
+        isPlayerOnly: true,
+        hasEverEnteredEditor: true
+    };
+    /* modeReducer(state, action) */
+    expect(modeReducer(previousState, action)).toEqual(newState);
+});