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/query-form/query-form.html

@@ -0,0 +1,102 @@
+<div class="query-section">
+  <h2>Query Artifacts</h2>
+  <form [formGroup]="queryForm" (ngSubmit)="onSubmit()">
+    <div class="form-row">
+      <div class="form-group">
+        <label for="q-filename">Filename</label>
+        <input
+          type="text"
+          id="q-filename"
+          formControlName="filename"
+          placeholder="Search filename...">
+      </div>
+      <div class="form-group">
+        <label for="q-type">File Type</label>
+        <select id="q-type" formControlName="file_type">
+          <option value="">All</option>
+          <option value="csv">CSV</option>
+          <option value="json">JSON</option>
+          <option value="binary">Binary</option>
+          <option value="pcap">PCAP</option>
+        </select>
+      </div>
+    </div>
+
+    <div class="form-row">
+      <div class="form-group">
+        <label for="q-test-name">Test Name</label>
+        <input
+          type="text"
+          id="q-test-name"
+          formControlName="test_name"
+          placeholder="Search test name...">
+      </div>
+      <div class="form-group">
+        <label for="q-suite">Test Suite</label>
+        <input
+          type="text"
+          id="q-suite"
+          formControlName="test_suite"
+          placeholder="e.g., integration">
+      </div>
+    </div>
+
+    <div class="form-row">
+      <div class="form-group">
+        <label for="q-sim-source-id">SIM Source ID</label>
+        <input
+          type="text"
+          id="q-sim-source-id"
+          formControlName="sim_source_id"
+          placeholder="e.g., sim_run_abc123">
+      </div>
+      <div class="form-group">
+        <label for="q-result">Test Result</label>
+        <select id="q-result" formControlName="test_result">
+          <option value="">All</option>
+          <option value="pass">Pass</option>
+          <option value="fail">Fail</option>
+          <option value="skip">Skip</option>
+          <option value="error">Error</option>
+        </select>
+      </div>
+    </div>
+
+    <div class="form-row">
+      <div class="form-group">
+        <label for="q-tags">Tags (comma-separated)</label>
+        <input
+          type="text"
+          id="q-tags"
+          formControlName="tags"
+          placeholder="e.g., regression, smoke">
+      </div>
+    </div>
+
+    <div class="form-row">
+      <div class="form-group">
+        <label for="q-start-date">Start Date</label>
+        <input
+          type="datetime-local"
+          id="q-start-date"
+          formControlName="start_date">
+      </div>
+      <div class="form-group">
+        <label for="q-end-date">End Date</label>
+        <input
+          type="datetime-local"
+          id="q-end-date"
+          formControlName="end_date">
+      </div>
+    </div>
+
+    <div class="button-group">
+      <button type="submit" class="btn btn-primary btn-large">
+        🔍 Search
+      </button>
+      <button type="button" (click)="clearForm()" class="btn btn-secondary">
+        ✕ Clear
+      </button>
+    </div>
+  </form>
+</div>