Implement comprehensive library stats and charts (#1089)

* Implement comprehensive library stats and charts

* fix(stats): handle null or unknown readStatus consistently

* Fix readStatus in AuthorPopularityChartService

* Fix missing x-axis label in chart

* Add radar charts

* Increase css budget

* Chart positioning and subscription improvements

* Add data labels

* Increase budgets

booklore-ui/package.json

@@ -27,9 +27,12 @@
     "@tailwindcss/postcss": "^4.1.8",
     "@tweenjs/tween.js": "^25.0.0",
     "angular-oauth2-oidc": "^20.0.0",
+    "chart.js": "^4.5.0",
+    "chartjs-plugin-datalabels": "^2.2.0",
     "epubjs": "^0.3.93",
     "jwt-decode": "^4.0.0",
     "ng-lazyload-image": "^9.1.3",
+    "ng2-charts": "^8.0.0",
     "ngx-extended-pdf-viewer": "^23.3.1",
     "ngx-infinite-scroll": "^20.0.0",
     "primeicons": "^7.0.0",
@@ -40,7 +43,8 @@
     "tailwindcss-primeui": "^0.6.1",
     "tslib": "^2.8.1",
     "ws": "^8.18.2",
-    "zone.js": "^0.15.1"
+    "zone.js": "^0.15.1",
+    "@angular/cdk": "^20.2.2"
   },
   "devDependencies": {
     "@angular-devkit/build-angular": "^20.1.5",