Add Brave CDP automation, replace Oracle browser mode

Connects to user's running Brave via Chrome DevTools Protocol
to automate ChatGPT interaction. Uses puppeteer-core to open a
tab, send the prompt, wait for response, and extract the result.

No cookies, no separate profiles, no copy/paste. Just connects
to the browser where the user is already logged in.

One-time setup: relaunch Brave with --remote-debugging-port=9222

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

node_modules/chromium-bidi/lib/cjs/bidiMapper/modules/browser/ContextConfig.d.ts

@@ -0,0 +1,50 @@
+/**
+ * Copyright 2025 Google LLC.
+ * Copyright (c) Microsoft Corporation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import type { Protocol } from 'devtools-protocol';
+import type { Browser, BrowsingContext, Emulation, Session, UAClientHints } from '../../../protocol/protocol.js';
+/**
+ * Represents a context configurations. It can be global, per User Context, or per
+ * Browsing Context. The undefined value means the config will be taken from the upstream
+ * config. `null` values means the value should be default regardless of the upstream.
+ */
+export declare class ContextConfig {
+    acceptInsecureCerts?: boolean;
+    clientHints?: UAClientHints.Emulation.ClientHintsMetadata | null;
+    devicePixelRatio?: number | null;
+    disableNetworkDurableMessages?: true;
+    downloadBehavior?: Browser.DownloadBehavior | null;
+    emulatedNetworkConditions?: Emulation.NetworkConditions | null;
+    extraHeaders?: Protocol.Network.Headers;
+    geolocation?: Emulation.GeolocationCoordinates | Emulation.GeolocationPositionError | null;
+    locale?: string | null;
+    maxTouchPoints?: number | null;
+    prerenderingDisabled?: boolean;
+    screenArea?: Emulation.ScreenArea | null;
+    screenOrientation?: Emulation.ScreenOrientation | null;
+    scriptingEnabled?: false | null;
+    timezone?: string | null;
+    userAgent?: string | null;
+    userPromptHandler?: Session.UserPromptHandler;
+    viewport?: BrowsingContext.Viewport | null;
+    /**
+     * Merges multiple `ContextConfig` objects. The configs are merged in the order they are
+     * provided. For each property, the value from the last config that defines it will be
+     * used. The final result will not contain any `undefined` or `null` properties.
+     * `undefined` values are ignored. `null` values remove the already set value.
+     */
+    static merge(...configs: (ContextConfig | undefined)[]): ContextConfig;
+}