fix(cockpit): add fileReplacements for dev environment in Angular build

Author: blove

cockpit/langgraph/streaming/angular/project.json

@@ -13,12 +13,23 @@
         "browser": "cockpit/langgraph/streaming/angular/src/main.ts",
         "tsConfig": "cockpit/langgraph/streaming/angular/tsconfig.app.json",
         "styles": ["cockpit/langgraph/streaming/angular/src/styles.css"]
-      }
+      },
+      "configurations": {
+        "development": {
+          "fileReplacements": [
+            {
+              "replace": "cockpit/langgraph/streaming/angular/src/environments/environment.ts",
+              "with": "cockpit/langgraph/streaming/angular/src/environments/environment.development.ts"
+            }
+          ]
+        }
+      },
+      "defaultConfiguration": "development"
     },
     "serve": {
       "executor": "@angular/build:dev-server",
       "options": {
-        "buildTarget": "cockpit-langgraph-streaming-angular:build",
+        "buildTarget": "cockpit-langgraph-streaming-angular:build:development",
         "port": 4300,
         "proxyConfig": "cockpit/langgraph/streaming/angular/proxy.conf.json"
       }