Fix critical errors: infinite loop, database schema, and add comprehensive E2E tests

## Critical Fixes:

1. **Fix infinite loop in useGasEstimate hook**
   - Removed unstable `params` dependency causing infinite re-renders
   - Removed wallet connection requirement for MVP
   - Simplified to only depend on stable `transactionType`
   - Fixes "Maximum update depth exceeded" error spam

2. **Fix database schema mismatches**
   - Removed `blockchain_escrow` from Wallet model
   - Removed blockchain fields from Bet model (blockchain_bet_id, blockchain_tx_hash, blockchain_status)
   - Models now match existing database schema
   - Fixes "OperationalError: no such column" errors

3. **Fix bet creation**
   - useBlockchainBet now makes real API calls (not pseudocode)
   - Bets properly created in database
   - Returns actual bet IDs and status

## Testing:

- Added comprehensive Playwright E2E test suite (test-e2e-comprehensive.js)
- Tests all critical flows: login, marketplace, wallet, create bet, my bets, navigation
- Captures all console errors and warnings
- Result: ✅ 0 errors (was 500+)

## Development:

- Added docker-compose.dev.yml for local development with hot-reload
- Added dev.sh quick-start script
- Added LOCAL_DEVELOPMENT.md comprehensive guide
- Updated vite.config.ts to support dynamic ports (dev=5173, prod=80)
- Updated README with documentation links

## Files Changed:

Backend:
- backend/app/models/wallet.py - Remove blockchain_escrow field
- backend/app/models/bet.py - Remove blockchain fields

Frontend:
- frontend/src/blockchain/hooks/useGasEstimate.ts - Fix infinite loop
- frontend/src/blockchain/hooks/useBlockchainBet.ts - Add real API calls
- frontend/vite.config.ts - Dynamic port support

Docs/Scripts:
- FIXES_APPLIED.md - Detailed fix documentation
- LOCAL_DEVELOPMENT.md - Local dev guide
- docker-compose.dev.yml - Dev environment config
- dev.sh - Quick start script
- test-e2e-comprehensive.js - E2E test suite

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

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

dev.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+
+# Local Development Quick Start Script
+
+echo "🚀 Starting H2H Local Development Environment..."
+echo ""
+
+# Check if Docker is running
+if ! docker info > /dev/null 2>&1; then
+    echo "❌ Docker is not running. Please start Docker Desktop and try again."
+    exit 1
+fi
+
+echo "✅ Docker is running"
+echo ""
+
+# Start services
+echo "📦 Building and starting services..."
+docker compose -f docker-compose.dev.yml up --build -d
+
+echo ""
+echo "⏳ Waiting for services to be ready..."
+sleep 5
+
+# Check if services are running
+BACKEND_STATUS=$(docker compose -f docker-compose.dev.yml ps backend --status running --format json 2>/dev/null | grep -c "running" || echo "0")
+FRONTEND_STATUS=$(docker compose -f docker-compose.dev.yml ps frontend --status running --format json 2>/dev/null | grep -c "running" || echo "0")
+
+if [ "$BACKEND_STATUS" = "1" ] && [ "$FRONTEND_STATUS" = "1" ]; then
+    echo ""
+    echo "✅ All services are running!"
+    echo ""
+    echo "🌐 Access your application:"
+    echo "   Frontend:  http://localhost:5173"
+    echo "   Backend:   http://localhost:8000"
+    echo "   API Docs:  http://localhost:8000/docs"
+    echo ""
+    echo "👤 Test Users:"
+    echo "   alice@example.com   / password123"
+    echo "   bob@example.com     / password123"
+    echo "   charlie@example.com / password123"
+    echo ""
+    echo "📊 View logs:"
+    echo "   docker compose -f docker-compose.dev.yml logs -f"
+    echo ""
+    echo "🛑 Stop services:"
+    echo "   docker compose -f docker-compose.dev.yml down"
+    echo ""
+else
+    echo ""
+    echo "⚠️  Services may not be ready yet. Check status with:"
+    echo "   docker compose -f docker-compose.dev.yml ps"
+    echo ""
+    echo "📋 View logs:"
+    echo "   docker compose -f docker-compose.dev.yml logs -f"
+fi