Migrate Angular 2 to Angular 19 with standalone components

- Upgrade Angular, Firebase, and AngularFire to latest versions
- Replace NgModules with standalone components and bootstrapApplication
- Replace angular-cli.json with angular.json and ESLint
- Add Firebase App Check with reCAPTCHA v3 for abuse protection
- Move Firebase config out of version control (firebaseConfig.example.ts)
- Fix AngularFire injection context errors using runInInjectionContext
- Implement drag-and-drop reordering within and across columns
- Add inline editing for card title and description
- Add subtask deletion with confirmation modal
- Refresh UI with modern card-based look and feel

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

package.json

@@ -1,51 +1,47 @@
 {
   "name": "kanban2",
   "version": "0.0.0",
-  "license": "MIT",
-  "angular-cli": {},
   "scripts": {
+    "ng": "ng",
     "start": "ng serve",
-    "lint": "tslint \"src/**/*.ts\"",
-    "test": "ng test",
-    "pree2e": "webdriver-manager update",
-    "e2e": "protractor"
+    "build": "ng build",
+    "watch": "ng build --watch --configuration development",
+    "test": "ng test"
   },
   "private": true,
   "dependencies": {
-    "@angular/common": "19.2.16",
-    "@angular/compiler": "2.4.7",
-    "@angular/core": "10.2.5",
-    "@angular/forms": "2.4.7",
-    "@angular/http": "2.4.7",
-    "@angular/platform-browser": "2.4.7",
-    "@angular/platform-browser-dynamic": "2.4.7",
-    "@angular/router": "3.4.7",
-    "angularfire2": "^2.0.0-beta.7",
-    "bootstrap": "^4.1.3",
-    "core-js": "2.4.1",
-    "firebase": "10.9.0",
-    "ng2-bootstrap": "^1.3.3",
-    "ng2-dnd": "^2.2.2",
-    "rxjs": "5.0.3",
-    "ts-helpers": "1.1.2",
-    "zone.js": "0.7.6"
+    "@angular/animations": "^19.2.21",
+    "@angular/cdk": "^19.2.19",
+    "@angular/common": "^19.2.0",
+    "@angular/compiler": "^19.2.0",
+    "@angular/core": "^19.2.0",
+    "@angular/fire": "^19.2.0",
+    "@angular/forms": "^19.2.0",
+    "@angular/platform-browser": "^19.2.0",
+    "@angular/platform-browser-dynamic": "^19.2.0",
+    "@angular/router": "^19.2.0",
+    "bootstrap": "^5.3.8",
+    "firebase": "^11.10.0",
+    "rxjs": "~7.8.0",
+    "tslib": "^2.3.0",
+    "zone.js": "~0.15.0"
   },
   "devDependencies": {
-    "@angular/compiler-cli": "2.4.7",
-    "@types/jasmine": "2.5.38",
-    "@types/node": "^6.0.60",
-    "angular-cli": "1.0.0-beta.28.3",
-    "codelyzer": "~1.0.0-beta.3",
-    "jasmine-core": "2.5.2",
-    "jasmine-spec-reporter": "2.5.0",
-    "karma": "6.3.16",
-    "karma-chrome-launcher": "2.0.0",
-    "karma-cli": "1.0.1",
-    "karma-jasmine": "1.0.2",
-    "karma-remap-istanbul": "0.2.1",
-    "protractor": "4.0.13",
-    "ts-node": "1.2.1",
-    "tslint": "4.2.0",
-    "typescript": "~2.1.6"
+    "@angular-devkit/build-angular": "^19.2.24",
+    "@angular/cli": "^19.2.24",
+    "@angular/compiler-cli": "^19.2.0",
+    "@types/jasmine": "~5.1.0",
+    "angular-eslint": "^21.0.1",
+    "jasmine-core": "~5.6.0",
+    "karma": "~6.4.0",
+    "karma-chrome-launcher": "~3.2.0",
+    "karma-coverage": "~2.2.0",
+    "karma-jasmine": "~5.1.0",
+    "karma-jasmine-html-reporter": "~2.1.0",
+    "typescript": "~5.7.2"
+  },
+  "overrides": {
+    "serialize-javascript": "^7.0.5",
+    "tar": "^7.5.11"
   }
 }