Add comparison pipeline scripts and ignore generated output

.gitignore

@@ -52,3 +52,7 @@ playwright-report-angular/
 
 # Visual parity screenshot diffs (generated)
 screenshot-diffs/
+comparison-report/
+
+# Superpowers brainstorm sessions
+.superpowers/

package.json

@@ -24,7 +24,11 @@
     "test:e2e": "playwright test",
     "test:e2e:angular": "playwright test --config=playwright-angular.config.ts tests/e2e-angular/cross-app/",
     "proxy": "node scripts/api-proxy.mjs",
-    "dev:full": "node scripts/dev-server.mjs"
+    "dev:full": "node scripts/dev-server.mjs",
+    "compare:visual": "tsx tests/parity/visual/screenshot-diff-multi.ts && tsx tests/parity/visual/generate-report.ts",
+    "compare:gap": "tsx tests/parity/gap/gap-analysis.ts",
+    "compare:behavior": "playwright test --config=playwright-angular.config.ts tests/e2e-angular/cross-app/",
+    "compare:all": "pnpm compare:visual && pnpm compare:gap && pnpm compare:behavior"
   },
   "dependencies": {
     "@microsoft/signalr": "^10.0.0",