feat(browser): add POST /open with session restore and reader mode

- restores cookies and localStorage from DB before page navigation
- readerMode flag extracts plain text via @mozilla/readability (Firefox reader engine)
- add localStorage default '{}' on session entity for clean schema migrations

package.json

@@ -13,6 +13,7 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
+    "@mozilla/readability": "^0.6.0",
     "@nestjs/common": "^11.1.18",
     "@nestjs/config": "^4.0.3",
     "@nestjs/core": "^11.1.18",
@@ -22,6 +23,7 @@
     "better-sqlite3": "^12.8.0",
     "class-transformer": "^0.5.1",
     "class-validator": "^0.14.4",
+    "jsdom": "^29.0.2",
     "playwright": "^1.59.1",
     "reflect-metadata": "^0.2.2",
     "rxjs": "^7.8.2",
@@ -31,6 +33,8 @@
   "devDependencies": {
     "@nestjs/cli": "^11.0.17",
     "@types/better-sqlite3": "^7.6.13",
+    "@types/jsdom": "^28.0.1",
+    "@types/mozilla__readability": "^0.4.2",
     "@types/node": "^25.5.2",
     "typescript": "^6.0.2"
   }