Migrate frontend to Angular 20 with full Docker support

Implemented a complete Angular 20 migration with modern standalone components architecture and production-ready Docker deployment:

**Frontend Migration:**
- Created Angular 20 application with standalone components (no NgModules)
- Implemented three main components: artifacts-list, upload-form, query-form
- Added TypeScript models and services for type-safe API communication
- Migrated dark theme UI with all existing features
- Configured routing and navigation between views
- Set up development proxy for seamless API integration
- Reactive forms with validation for upload and query functionality
- Auto-refresh artifacts every 5 seconds with RxJS observables
- Client-side sorting, filtering, and search capabilities
- Tags displayed as inline badges, SIM source grouping support

**Docker Integration:**
- Multi-stage Dockerfile for Angular (Node 24 build, nginx Alpine serve)
- nginx configuration for SPA routing and API proxy
- Updated docker-compose.yml with frontend service on port 80
- Health checks for all services
- Production-optimized build with gzip compression and asset caching

**Technical Stack:**
- Angular 20 with standalone components
- TypeScript for type safety
- RxJS for reactive programming
- nginx as reverse proxy
- Multi-stage Docker builds for optimal image size

All features fully functional and tested in Docker environment.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

frontend/src/app/services/artifact.ts

@@ -0,0 +1,51 @@
+import { Injectable } from '@angular/core';
+import { HttpClient, HttpParams } from '@angular/common/http';
+import { Observable } from 'rxjs';
+import { Artifact, ArtifactQuery, ApiInfo } from '../models/artifact.model';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class ArtifactService {
+  private apiUrl = '/api/v1/artifacts';
+  private baseUrl = '/api';
+
+  constructor(private http: HttpClient) {}
+
+  getApiInfo(): Observable<ApiInfo> {
+    return this.http.get<ApiInfo>(this.baseUrl);
+  }
+
+  listArtifacts(limit: number = 100, offset: number = 0): Observable<Artifact[]> {
+    const params = new HttpParams()
+      .set('limit', limit.toString())
+      .set('offset', offset.toString());
+    return this.http.get<Artifact[]>(this.apiUrl + '/', { params });
+  }
+
+  getArtifact(id: number): Observable<Artifact> {
+    return this.http.get<Artifact>(`${this.apiUrl}/${id}`);
+  }
+
+  queryArtifacts(query: ArtifactQuery): Observable<Artifact[]> {
+    return this.http.post<Artifact[]>(`${this.apiUrl}/query`, query);
+  }
+
+  uploadArtifact(formData: FormData): Observable<Artifact> {
+    return this.http.post<Artifact>(`${this.apiUrl}/upload`, formData);
+  }
+
+  downloadArtifact(id: number): Observable<Blob> {
+    return this.http.get(`${this.apiUrl}/${id}/download`, {
+      responseType: 'blob'
+    });
+  }
+
+  deleteArtifact(id: number): Observable<any> {
+    return this.http.delete(`${this.apiUrl}/${id}`);
+  }
+
+  generateSeedData(count: number): Observable<any> {
+    return this.http.post(`/api/v1/seed/generate/${count}`, {});
+  }
+}