Add Firefox cookie import and stealth mode

- Firefox cookie importer: reads cookies.sqlite with WAL-safe copy,
  profile detection via profiles.ini, cross-platform paths, domain filtering
- Stealth mode: opt-in via launch(stealth: true), patches navigator.webdriver,
  plugins/mimeTypes, permissions API, WebGL renderer, iframe isolation,
  languages, plus realistic Safari UA and context hardening
- Import tool now accepts 'safari' | 'firefox' source
- STEALTH.md reference documentation
- Upgraded @types/node to v25 for node:sqlite support

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

package-lock.json

@@ -1,13 +1,13 @@
 {
   "name": "@saiden/browse",
-  "version": "0.2.20",
+  "version": "0.2.20-8ca7263",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@saiden/browse",
-      "version": "0.2.20",
-      "license": "MIT",
+      "version": "0.2.20-8ca7263",
+      "license": "BUSL-1.1",
       "dependencies": {
         "@modelcontextprotocol/sdk": "^1.26.0",
         "chalk": "^5.6.2",
@@ -21,7 +21,7 @@
       },
       "devDependencies": {
         "@biomejs/biome": "^1.9.0",
-        "@types/node": "^20.11.0",
+        "@types/node": "^25.6.0",
         "@types/sharp": "^0.31.1",
         "@vitest/coverage-v8": "^4.0.18",
         "tsx": "^4.21.0",
@@ -1636,13 +1636,13 @@
       "license": "MIT"
     },
     "node_modules/@types/node": {
-      "version": "20.19.33",
-      "resolved": "https://registry.npmjs.org/@types/node/-/node-20.19.33.tgz",
-      "integrity": "sha512-Rs1bVAIdBs5gbTIKza/tgpMuG1k3U/UMJLWecIMxNdJFDMzcM5LOiLVRYh3PilWEYDIeUDv7bpiHPLPsbydGcw==",
+      "version": "25.6.0",
+      "resolved": "https://registry.npmjs.org/@types/node/-/node-25.6.0.tgz",
+      "integrity": "sha512-+qIYRKdNYJwY3vRCZMdJbPLJAtGjQBudzZzdzwQYkEPQd+PJGixUL5QfvCLDaULoLv+RhT3LDkwEfKaAkgSmNQ==",
       "dev": true,
       "license": "MIT",
       "dependencies": {
-        "undici-types": "~6.21.0"
+        "undici-types": "~7.19.0"
       }
     },
     "node_modules/@types/sharp": {
@@ -3479,9 +3479,9 @@
       }
     },
     "node_modules/undici-types": {
-      "version": "6.21.0",
-      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-6.21.0.tgz",
-      "integrity": "sha512-iwDZqg0QAGrg9Rav5H4n0M64c3mkR59cJ6wQp+7C4nI0gsmExaedaYLNO44eT4AtBBwjbTiGPMlt2Md0T9H9JQ==",
+      "version": "7.19.2",
+      "resolved": "https://registry.npmjs.org/undici-types/-/undici-types-7.19.2.tgz",
+      "integrity": "sha512-qYVnV5OEm2AW8cJMCpdV20CDyaN3g0AjDlOGf1OW4iaDEx8MwdtChUp4zu4H0VP3nDRF/8RKWH+IPp9uW0YGZg==",
       "dev": true,
       "license": "MIT"
     },