NextGraph integration (WIP), broker banner, and feature-based architecture

- Add NextGraph data layer with @ng-org/orm, SHEX shapes (Event, UserProfile,
  Participation), session management, and FestipodDataContext with dual-mode
  operation (connected via NextGraph or local seed data)
- Add BrokerBanner and NgStatus components showing connection status
- Refactor to feature-based architecture: organize code by business domain
  (event, user, home, auth, workshop, meeting, notification) instead of
  technical layer. Modules only import from shared/, never from each other
- Collocate BDD features and step definitions with their modules: event-specific
  steps in event/steps/, user steps in user/steps/, shared generic steps remain
  in shared/steps/
- Set up multi-layer BDD structure (frontend/backend/e2e steps per module)
- Add project documentation (AGENTS.md, .project/knowledge/)

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

scripts/extract-step-definitions.ts

@@ -11,11 +11,23 @@ interface StepDefinition {
   lineNumber: number;
 }
 
-const stepFiles = [
-  'features/step_definitions/navigation.steps.ts',
-  'features/step_definitions/form.steps.ts',
-  'features/step_definitions/screen.steps.ts',
-];
+import { Glob } from 'bun';
+
+// Discover all step definition files: shared + module-specific
+function discoverStepFiles(): string[] {
+  const files: string[] = [];
+  // Shared steps
+  for (const f of new Glob('src/shared/steps/**/*.steps.ts').scanSync('.')) {
+    files.push(f);
+  }
+  // Module steps
+  for (const f of new Glob('src/modules/*/steps/**/*.steps.ts').scanSync('.')) {
+    files.push(f);
+  }
+  return files.sort();
+}
+
+const stepFiles = discoverStepFiles();
 
 function extractStepDefinitions(): StepDefinition[] {
   const definitions: StepDefinition[] = [];
@@ -115,7 +127,7 @@ export const stepDefinitions: StepDefinitionInfo[] = ${JSON.stringify(definition
 ${findFunctionCode}
 `;
 
-  await Bun.write('src/data/stepDefinitions.ts', output);
+  await Bun.write('src/shared/data/stepDefinitions.ts', output);
   console.log(`Generated ${definitions.length} step definitions`);
 }