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/webdriver-bidi-protocol/out/gen/ua-client-hints.d.ts

@@ -0,0 +1,35 @@
+export type UserAgentClientHintsCommand =
+  Emulation.SetClientHintsOverrideCommand;
+export declare namespace Emulation {
+  type SetClientHintsOverrideCommand = {
+    method: 'emulation.setClientHintsOverride';
+    params: {
+      clientHints: Emulation.ClientHintsMetadata | null;
+      contexts?: [string, ...string[]];
+      userContexts?: [string, ...string[]];
+    };
+  };
+}
+export declare namespace Emulation {
+  type ClientHintsMetadata = {
+    brands?: [...Emulation.BrandVersion[]];
+    fullVersionList?: [...Emulation.BrandVersion[]];
+    platform?: string;
+    platformVersion?: string;
+    architecture?: string;
+    model?: string;
+    mobile?: boolean;
+    bitness?: string;
+    wow64?: boolean;
+    formFactors?: [...string[]];
+  };
+}
+export declare namespace Emulation {
+  type BrandVersion = {
+    brand: string;
+    version: string;
+  };
+}
+export declare namespace Emulation {
+  type SetClientHintsOverrideResult = Record<string, never>;
+}