Initial commit: Game Maker phase 1

Canvas-only 2D game editor/runtime built on PixiJS v8 + Vite + TypeScript.

- core: asset model (Scene/Camera/Sprite), scene objects with sparse
  overrides, property schema + resolve, command stack (undo/redo),
  serialization and project store interface (16 unit tests)
- ui: custom in-canvas widget toolkit (panels, fields, color picker,
  list/scroll, popup) with a hidden <input> keyboard bridge
- editor: asset/hierarchy panels, schema-driven inspector, toolbar
- viewport: box rendering, camera frame, selection gizmo, drag/zoom/pan
- runtime: world/entity instantiation for play mode, input, camera follow
- api: PHP JSON project store with revision counter (409 on conflict)
- tools: CDP-based e2e smoke test

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

vite.config.ts

@@ -0,0 +1,50 @@
+import { copyFileSync } from 'node:fs';
+import { dirname, resolve } from 'node:path';
+import { fileURLToPath } from 'node:url';
+import { defineConfig, type Plugin } from 'vite';
+
+const __dirname = dirname(fileURLToPath(import.meta.url));
+
+/**
+ * The workspace folder itself is what nginx serves under https://nockal.com/game-maker/.
+ * The Vite source page lives in `web/index.html`; the build writes hashed assets into
+ * `dist/` and this plugin copies the built HTML to the folder root so that the site URL
+ * loads the production bundle while `api/` and `data/` sit next to it.
+ */
+function publishIndexHtml(): Plugin {
+  return {
+    name: 'game-maker:publish-index-html',
+    apply: 'build',
+    closeBundle() {
+      copyFileSync(resolve(__dirname, 'dist/index.html'), resolve(__dirname, 'index.html'));
+    },
+  };
+}
+
+export default defineConfig({
+  root: 'web',
+  base: '/game-maker/dist/',
+  publicDir: false,
+  plugins: [publishIndexHtml()],
+  build: {
+    outDir: '../dist',
+    emptyOutDir: true,
+    target: 'es2022',
+    sourcemap: true,
+  },
+  server: {
+    port: 5175,
+    // During development the PHP API is served by the production nginx; proxy it.
+    proxy: {
+      '/game-maker/api': {
+        target: 'https://nockal.com',
+        changeOrigin: true,
+      },
+    },
+  },
+  test: {
+    root: '.',
+    include: ['tests/**/*.test.ts'],
+    environment: 'node',
+  },
+});