feat: add darkMode and hideSelectors to Node.js and Python SDKs

sdk/node/src/index.ts

@@ -33,6 +33,10 @@ export interface ScreenshotOptions {
   delay?: number;
   /** Page load event to wait for (default: domcontentloaded) */
   waitUntil?: "load" | "domcontentloaded" | "networkidle0" | "networkidle2";
+  /** Emulate dark mode (prefers-color-scheme: dark) */
+  darkMode?: boolean;
+  /** CSS selectors to hide before capture (max 10, each max 200 chars) */
+  hideSelectors?: string | string[];
 }
 
 export interface SnapAPIConfig {
@@ -108,6 +112,18 @@ export class SnapAPI {
    *   format: 'png',
    *   deviceScale: 2
    * });
+   *
+   * // Dark mode with hidden elements
+   * const darkScreenshot = await snap.capture({
+   *   url: 'https://example.com',
+   *   darkMode: true,
+   *   hideSelectors: ['.ads', '.popup', '.cookie-banner']
+   * });
+   *
+   * // Hide single selector
+   * const clean = await snap.capture('https://example.com', {
+   *   hideSelectors: '.advertisement'
+   * });
    * ```
    *
    * @throws {SnapAPIError} When the API returns an error response