chore(ai): security scan and dependency issues

- Generated artifacts/npm-audit.json
- Generated artifacts/npm-outdated.json
- Created issue drafts in artifacts/issues/ for blocked/major upgrades:
  - nostr-tools (Blocked by policy)
  - cross-env (Major v10)
  - tailwindcss (Major v4)
  - jsdom (Major v27)
  - esbuild (Major v0.27)

artifacts/npm-audit.json

@@ -12,11 +12,11 @@
     },
     "dependencies": {
       "prod": 5,
-      "dev": 316,
+      "dev": 314,
       "optional": 29,
       "peer": 0,
       "peerOptional": 0,
-      "total": 320
+      "total": 318
     }
   }
 }

artifacts/npm-outdated.json

@@ -1,11 +1,4 @@
 {
-  "@playwright/test": {
-    "current": "1.57.0",
-    "wanted": "1.58.0",
-    "latest": "1.58.0",
-    "dependent": "app",
-    "location": "/app/node_modules/@playwright/test"
-  },
   "cross-env": {
     "current": "7.0.3",
     "wanted": "7.0.3",
@@ -41,13 +34,6 @@
     "dependent": "app",
     "location": "/app/node_modules/pixelmatch"
   },
-  "playwright": {
-    "current": "1.57.0",
-    "wanted": "1.58.0",
-    "latest": "1.58.0",
-    "dependent": "app",
-    "location": "/app/node_modules/playwright"
-  },
   "prettier-plugin-tailwindcss": {
     "current": "0.6.14",
     "wanted": "0.6.14",
@@ -62,13 +48,6 @@
     "dependent": "app",
     "location": "/app/node_modules/stylelint"
   },
-  "stylelint-config-standard": {
-    "current": "36.0.1",
-    "wanted": "36.0.1",
-    "latest": "40.0.0",
-    "dependent": "app",
-    "location": "/app/node_modules/stylelint-config-standard"
-  },
   "tailwindcss": {
     "current": "3.4.19",
     "wanted": "3.4.19",