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.html

@@ -0,0 +1,108 @@
+<div class="upload-section">
+  <h2>Upload Artifact</h2>
+  <form [formGroup]="uploadForm" (ngSubmit)="onSubmit()">
+    <div class="form-group">
+      <label for="file">File *</label>
+      <input type="file" id="file" (change)="onFileSelected($event)" required>
+      <small>Supported: CSV, JSON, binary files, PCAP</small>
+    </div>
+
+    <div class="form-row">
+      <div class="form-group">
+        <label for="sim-source">Sim Source *</label>
+        <input
+          type="text"
+          id="sim-source"
+          formControlName="sim_source"
+          placeholder="e.g., Jenkins, GitLab CI"
+          required>
+      </div>
+      <div class="form-group">
+        <label for="uploaded-by">Uploaded By *</label>
+        <input
+          type="text"
+          id="uploaded-by"
+          formControlName="uploaded_by"
+          placeholder="e.g., john.doe"
+          required>
+      </div>
+    </div>
+
+    <div class="form-row">
+      <div class="form-group">
+        <label for="sim-source-id">SIM Source ID (for grouping)</label>
+        <input
+          type="text"
+          id="sim-source-id"
+          formControlName="sim_source_id"
+          placeholder="e.g., sim_run_20251015_001">
+        <small>Use same ID for multiple artifacts from same source</small>
+      </div>
+      <div class="form-group">
+        <label for="tags">Tags (comma-separated) *</label>
+        <input
+          type="text"
+          id="tags"
+          formControlName="tags"
+          placeholder="e.g., regression, smoke, critical"
+          required>
+      </div>
+    </div>
+
+    <div class="form-row">
+      <div class="form-group">
+        <label for="test-result">Test Result</label>
+        <select id="test-result" formControlName="test_result">
+          <option value="">-- Select --</option>
+          <option value="pass">Pass</option>
+          <option value="fail">Fail</option>
+          <option value="skip">Skip</option>
+          <option value="error">Error</option>
+        </select>
+      </div>
+      <div class="form-group">
+        <label for="version">Version</label>
+        <input
+          type="text"
+          id="version"
+          formControlName="version"
+          placeholder="e.g., v1.0.0">
+      </div>
+    </div>
+
+    <div class="form-group">
+      <label for="description">Description</label>
+      <textarea
+        id="description"
+        formControlName="description"
+        rows="3"
+        placeholder="Describe this artifact..."></textarea>
+    </div>
+
+    <div class="form-group">
+      <label for="test-config">Test Config (JSON)</label>
+      <textarea
+        id="test-config"
+        formControlName="test_config"
+        rows="4"
+        placeholder='{"browser": "chrome", "timeout": 30}'></textarea>
+    </div>
+
+    <div class="form-group">
+      <label for="custom-metadata">Custom Metadata (JSON)</label>
+      <textarea
+        id="custom-metadata"
+        formControlName="custom_metadata"
+        rows="4"
+        placeholder='{"build": "1234", "commit": "abc123"}'></textarea>
+    </div>
+
+    <button type="submit" class="btn btn-primary btn-large" [disabled]="uploading">
+      {{ uploading ? 'Uploading...' : '📤 Upload Artifact' }}
+    </button>
+  </form>
+
+  <div *ngIf="uploadStatus" class="upload-status" [class.success]="uploadStatus.success" [class.error]="!uploadStatus.success">
+    {{ uploadStatus.message }}
+  </div>
+</div>