feat(scenarios): add step title, scenario credentials, and environment context in executor

- add nullable title column to scenario steps; exposed in create/edit forms and step table
- add scenario-credential join (many-to-many with CredentialEntity) with CRUD endpoints
- expose environment URLs in code executor helpers via helpers.env and helpers.getEnvUrl()
- resolve and cache environment per run from the login step's environmentName in scheduler
- add section spacing and step table title column to ScenarioDetailPage

server/src/app.module.ts

@@ -9,12 +9,15 @@ import { BrowserModule } from "./browser/browser.module";
 import { SessionEntity } from "./session/session.entity";
 import { EnvironmentEntity } from "./environment/environment.entity";
 import { EnvironmentModule } from "./environment/environment.module";
+import { CredentialEntity } from "./credential/credential.entity";
+import { CredentialModule } from "./credential/credential.module";
 import { McpModule } from "./mcp/mcp.module";
 import { ScenarioEntity } from "./scenario/scenario.entity";
 import { ScenarioStepEntity } from "./scenario/scenario-step.entity";
 import { ScenarioRunEntity } from "./scenario/scenario-run.entity";
 import { ScenarioRunStepEntity } from "./scenario/scenario-run-step.entity";
 import { ScenarioRunLogEntity } from "./scenario/scenario-run-log.entity";
+import { ScenarioCredentialEntity } from "./scenario/scenario-credential.entity";
 import { ScenarioModule } from "./scenario/scenario.module";
 
 @Module({
@@ -33,11 +36,13 @@ import { ScenarioModule } from "./scenario/scenario.module";
         entities: [
           SessionEntity,
           EnvironmentEntity,
+          CredentialEntity,
           ScenarioEntity,
           ScenarioStepEntity,
           ScenarioRunEntity,
           ScenarioRunStepEntity,
           ScenarioRunLogEntity,
+          ScenarioCredentialEntity,
         ],
         synchronize: true,
       }),
@@ -45,6 +50,7 @@ import { ScenarioModule } from "./scenario/scenario.module";
     AuthModule,
     BrowserModule,
     EnvironmentModule,
+    CredentialModule,
     ScenarioModule,
     McpModule,
     HealthModule,