feat(scene): video map editor parity and help updates

Enable scene editor, overlays, effects, and darkness on video scenes; brighten GM trap markers; document snap, NPC types, materials, and control controls in RU/EN help.

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

app/main/project/sharpRuntime.mjs

@@ -1,10 +1,30 @@
 /**
  * Lazy `sharp` load so a corrupt/missing native install does not crash Electron at import time.
  * Call only from image-processing paths; errors are recoverable for the rest of the app.
+ *
+ * Note: main is bundled to CJS (esbuild). `import.meta.url` is empty there — prefer `__filename`.
  */
 import { createRequire } from 'node:module';
+import path from 'node:path';
+import { fileURLToPath } from 'node:url';
 
-const require = createRequire(import.meta.url);
+/**
+ * @returns {string}
+ */
+function requireBaseFilename() {
+  // CJS bundle / Electron main
+  if (typeof __filename === 'string' && __filename.length > 0) {
+    return __filename;
+  }
+  // Direct ESM (unit tests)
+  const metaUrl = import.meta.url;
+  if (typeof metaUrl === 'string' && metaUrl.startsWith('file:')) {
+    return fileURLToPath(metaUrl);
+  }
+  return path.join(process.cwd(), 'package.json');
+}
+
+const require = createRequire(requireBaseFilename());
 
 /** @type {typeof import('sharp') | null} */
 let cached = null;