Add web UI with artifact table and upload functionality

Features:
- Modern web interface with table view of all artifacts
- Display all metadata: filename, type, size, test info, tags
- Upload form with full metadata support
- Query/filter interface
- Detail modal for viewing full artifact information
- Download and delete actions
- Integrated seed data generation via UI
- Responsive design with gradient theme

Technical:
- Pure HTML/CSS/JavaScript (no frameworks)
- FastAPI serves static files
- Seed data API endpoint for easy testing
- Pagination support
- Real-time deployment mode display

The UI is now accessible at http://localhost:8000/

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

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

app/api/seed.py

@@ -0,0 +1,38 @@
+from fastapi import APIRouter, HTTPException
+from app.database import SessionLocal
+import asyncio
+import sys
+import os
+
+# Add parent directory to path
+sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), '../..')))
+
+from utils.seed_data import generate_seed_data as generate_data, clear_all_data
+
+router = APIRouter(prefix="/api/v1/seed", tags=["seed"])
+
+
+@router.post("/generate/{count}")
+async def generate_seed_data(count: int = 10):
+    """Generate seed data"""
+    if count < 1 or count > 100:
+        raise HTTPException(status_code=400, detail="Count must be between 1 and 100")
+
+    try:
+        artifact_ids = await generate_data(count)
+        return {
+            "message": f"Successfully generated {len(artifact_ids)} artifacts",
+            "artifact_ids": artifact_ids
+        }
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=f"Seed generation failed: {str(e)}")
+
+
+@router.delete("/clear")
+async def clear_data():
+    """Clear all data"""
+    try:
+        await clear_all_data()
+        return {"message": "All data cleared successfully"}
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=f"Clear failed: {str(e)}")