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/components/upload-form/upload-form.ts

@@ -0,0 +1,132 @@
+import { Component } from '@angular/core';
+import { CommonModule } from '@angular/common';
+import { ReactiveFormsModule, FormBuilder, FormGroup, Validators } from '@angular/forms';
+import { ArtifactService } from '../../services/artifact';
+
+@Component({
+  selector: 'app-upload-form',
+  standalone: true,
+  imports: [CommonModule, ReactiveFormsModule],
+  templateUrl: './upload-form.html',
+  styleUrls: ['./upload-form.css']
+})
+export class UploadFormComponent {
+  uploadForm: FormGroup;
+  selectedFile: File | null = null;
+  uploading: boolean = false;
+  uploadStatus: { message: string, success: boolean } | null = null;
+
+  constructor(
+    private fb: FormBuilder,
+    private artifactService: ArtifactService
+  ) {
+    this.uploadForm = this.fb.group({
+      file: [null, Validators.required],
+      sim_source: ['', Validators.required],
+      uploaded_by: ['', Validators.required],
+      sim_source_id: [''],
+      tags: ['', Validators.required],
+      test_result: [''],
+      version: [''],
+      description: [''],
+      test_config: [''],
+      custom_metadata: ['']
+    });
+  }
+
+  onFileSelected(event: Event) {
+    const input = event.target as HTMLInputElement;
+    if (input.files && input.files.length > 0) {
+      this.selectedFile = input.files[0];
+      this.uploadForm.patchValue({ file: this.selectedFile });
+    }
+  }
+
+  onSubmit() {
+    if (!this.uploadForm.valid || !this.selectedFile) {
+      this.showStatus('Please fill in all required fields and select a file', false);
+      return;
+    }
+
+    // Validate JSON fields
+    const testConfig = this.uploadForm.value.test_config;
+    const customMetadata = this.uploadForm.value.custom_metadata;
+
+    if (testConfig) {
+      try {
+        JSON.parse(testConfig);
+      } catch (e) {
+        this.showStatus('Invalid Test Config JSON', false);
+        return;
+      }
+    }
+
+    if (customMetadata) {
+      try {
+        JSON.parse(customMetadata);
+      } catch (e) {
+        this.showStatus('Invalid Custom Metadata JSON', false);
+        return;
+      }
+    }
+
+    const formData = new FormData();
+    formData.append('file', this.selectedFile);
+    formData.append('test_suite', this.uploadForm.value.sim_source);
+    formData.append('test_name', this.uploadForm.value.uploaded_by);
+
+    if (this.uploadForm.value.sim_source_id) {
+      formData.append('sim_source_id', this.uploadForm.value.sim_source_id);
+    }
+
+    // Parse and append tags as JSON array
+    if (this.uploadForm.value.tags) {
+      const tagsArray = this.uploadForm.value.tags
+        .split(',')
+        .map((t: string) => t.trim())
+        .filter((t: string) => t);
+      formData.append('tags', JSON.stringify(tagsArray));
+    }
+
+    if (this.uploadForm.value.test_result) {
+      formData.append('test_result', this.uploadForm.value.test_result);
+    }
+
+    if (this.uploadForm.value.version) {
+      formData.append('version', this.uploadForm.value.version);
+    }
+
+    if (this.uploadForm.value.description) {
+      formData.append('description', this.uploadForm.value.description);
+    }
+
+    if (testConfig) {
+      formData.append('test_config', testConfig);
+    }
+
+    if (customMetadata) {
+      formData.append('custom_metadata', customMetadata);
+    }
+
+    this.uploading = true;
+    this.artifactService.uploadArtifact(formData).subscribe({
+      next: (artifact) => {
+        this.showStatus(`Successfully uploaded: ${artifact.filename}`, true);
+        this.uploadForm.reset();
+        this.selectedFile = null;
+        this.uploading = false;
+      },
+      error: (err) => {
+        this.showStatus('Upload failed: ' + err.error?.detail || err.message, false);
+        this.uploading = false;
+      }
+    });
+  }
+
+  private showStatus(message: string, success: boolean) {
+    this.uploadStatus = { message, success };
+    setTimeout(() => {
+      this.uploadStatus = null;
+    }, 5000);
+  }
+}