refactor: extract signals filter builder, add ESLint 10 config, fix low-hanging issues

web/package.json

@@ -6,7 +6,7 @@
     "dev": "next dev --turbopack",
     "build": "next build",
     "start": "next start",
-    "lint": "echo 'no lint'",
+    "lint": "eslint . --max-warnings 0",
     "format": "prettier --check .",
     "format:fix": "prettier --write .",
     "migrate": "node-pg-migrate up -m migrations",
@@ -24,14 +24,20 @@
     "uplot": "^1.6.32"
   },
   "devDependencies": {
+    "@eslint/js": "^10.0.1",
     "@types/node": "^24",
     "@types/pg": "^8.20.0",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
+    "eslint": "^10.4.1",
+    "eslint-plugin-import-x": "^4.16.2",
+    "eslint-plugin-react-x": "^5.8.11",
+    "globals": "^17.6.0",
     "node-pg-migrate": "^8.0.4",
     "postcss": "^8.5.14",
     "prettier": "^3.8.3",
     "tailwindcss": "^4.3.0",
-    "typescript": "^6.0.3"
+    "typescript": "^6.0.3",
+    "typescript-eslint": "^8.60.1"
   }
 }