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/netmask/test/badnets.coffee

@@ -0,0 +1,53 @@
+vows = require 'vows'
+assert = require 'assert'
+Netmask = require('../lib/netmask').Netmask
+
+shouldFailWithError = (msg) ->
+    context =
+        topic: ->
+            try
+                return new Netmask(@context.name)
+            catch e
+                return e
+        'should fail': (e) ->
+            assert.ok isError(e), "is an Error object #{e}"
+        "with error `#{msg}'": (e) ->
+            assert.ok e.message?.toLowerCase().indexOf(msg.toLowerCase()) > -1, "'#{e.message}' =~ #{msg}"
+
+    return context
+
+isError = (e) ->
+    return typeof e == 'object' and Object.prototype.toString.call(e) == '[object Error]'
+
+vows.describe('IPs with bytes greater than 255')
+    .addBatch
+        '209.256.68.22/255.255.224.0': shouldFailWithError 'Invalid net'
+        '209.180.68.22/256.255.224.0': shouldFailWithError 'Invalid mask'
+        '209.500.70.33/19': shouldFailWithError 'Invalid net'
+        '140.999.82': shouldFailWithError 'Invalid net'
+        '899.174': shouldFailWithError 'Invalid net'
+        '209.157.65536/19': shouldFailWithError 'Invalid net'
+        '209.300.64.0.10': shouldFailWithError 'Invalid net'
+        'garbage': shouldFailWithError 'Invalid net'
+    .export(module)
+    
+
+vows.describe('Invalid IP format')
+    .addBatch
+        ' 1.2.3.4': shouldFailWithError 'Invalid net'
+        '  1.2.3.4': shouldFailWithError 'Invalid net'
+        '1. 2.3.4': shouldFailWithError 'Invalid net'
+        '1.2. 3.4': shouldFailWithError 'Invalid net'
+        '1.2.3. 4': shouldFailWithError 'Invalid net'
+        '1.2.3.4 ': shouldFailWithError 'Invalid net'
+        '1 .2.3.4': shouldFailWithError 'Invalid net'
+        '018.0.0.0': shouldFailWithError 'Invalid net'
+        '08.0.0.0': shouldFailWithError 'Invalid net'
+        '0xfg.0.0.0': shouldFailWithError 'Invalid net'
+    .export(module)
+
+vows.describe('Ranges that are a power-of-two big, but are not legal blocks')
+    .addBatch
+        '218.0.0.0/221.255.255.255': shouldFailWithError 'Invalid mask'
+        '218.0.0.4/218.0.0.11': shouldFailWithError 'Invalid mask'
+    .export(module)