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>

FIXES_APPLIED.md

@@ -0,0 +1,135 @@
+# E2E Test Fixes Applied
+
+## Issues Found and Fixed
+
+### 1. ✅ Infinite Loop in useGasEstimate Hook - FIXED
+
+**Problem:**
+- `useGasEstimate` hook had `params` object in dependency array
+- Object changed every render → infinite re-renders
+- Caused thousands of "Maximum update depth exceeded" errors
+- Made CreateBetModal unusable
+
+**Fix:**
+- Removed `params` from dependency array (frontend/src/blockchain/hooks/useGasEstimate.ts:92)
+- Removed wallet connection requirement for MVP
+- Simplified hook to only depend on stable `transactionType`
+- Removed auto-refresh interval to prevent unnecessary re-renders
+
+**Files Modified:**
+- `frontend/src/blockchain/hooks/useGasEstimate.ts`
+
+### 2. ✅ Database Schema Mismatch - FIXED
+
+**Problem:**
+- Backend models had `blockchain_escrow` field (Wallet model)
+- Backend models had `blockchain_bet_id`, `blockchain_tx_hash`, `blockchain_status` fields (Bet model)
+- Database tables didn't have these columns
+- Caused `OperationalError: no such column` errors
+- All API calls failing
+
+**Fix:**
+- Removed `blockchain_escrow` from Wallet model (backend/app/models/wallet.py:15)
+- Removed blockchain fields from Bet model (backend/app/models/bet.py:61-64)
+- Models now match existing database schema
+- Blockchain features can be added later with proper migrations
+
+**Files Modified:**
+- `backend/app/models/wallet.py`
+- `backend/app/models/bet.py`
+
+### 3. ✅ Bet Creation Not Working - FIXED (Previous Session)
+
+**Problem:**
+- `useBlockchainBet` hook was pseudocode only
+- Wasn't actually calling backend API
+- Bets not being created
+
+**Fix:**
+- Replaced pseudocode with actual `fetch()` calls to backend API
+- Now creates bets in database properly
+- Returns proper bet ID and status
+
+**Files Modified:**
+- `frontend/src/blockchain/hooks/useBlockchainBet.ts`
+
+## Test Results
+
+### Before Fixes:
+```
+Console Errors: 500+ (infinite loop)
+- Maximum update depth exceeded (repeated thousands of times)
+- CORS errors (due to backend crashes from database errors)
+- Request failures
+```
+
+### After Fixes:
+```
+✅ Console Errors: 0
+⚠️  Console Warnings: 16 (all React Router v7 future flags - harmless)
+
+All 7 test suites passed:
+1. ✅ Login Flow
+2. ✅ Marketplace
+3. ✅ Wallet
+4. ✅ Create Bet
+5. ✅ My Bets
+6. ✅ Navigation
+7. ✅ Logout
+```
+
+## Files Changed Summary
+
+### Frontend:
+1. `frontend/src/blockchain/hooks/useGasEstimate.ts` - Fixed infinite loop
+2. `frontend/src/blockchain/hooks/useBlockchainBet.ts` - Added real API calls
+
+### Backend:
+1. `backend/app/models/wallet.py` - Removed blockchain_escrow field
+2. `backend/app/models/bet.py` - Removed blockchain fields
+
+## Remaining Warnings (Non-Critical)
+
+**React Router Future Flags** (16 warnings):
+- `v7_startTransition` - React Router will use React 18's startTransition in v7
+- `v7_relativeSplatPath` - Changes to relative route resolution
+
+**Impact**: None - these are just informational warnings about future versions
+
+**Action**: Can be safely ignored or fixed later by adding future flags to BrowserRouter
+
+## Testing
+
+Run comprehensive E2E tests:
+```bash
+node test-e2e-comprehensive.js
+```
+
+Expected output: 0 errors, 16 warnings (React Router future flags)
+
+## Production Deployment
+
+All fixes applied to both:
+- Local development environment (docker-compose.dev.yml)
+- Production configuration (docker-compose.yml)
+
+To deploy to Coolify:
+```bash
+git add .
+git commit -m "Fix infinite loop, database schema, and bet creation"
+git push
+```
+
+Coolify will auto-deploy with fixes.
+
+## Summary
+
+🎉 **All critical errors fixed!**
+- ✅ No infinite loops
+- ✅ Database schema matches models
+- ✅ Bet creation works
+- ✅ API calls succeed
+- ✅ No console errors
+- ✅ Application fully functional
+
+Only remaining items are informational React Router warnings that can be addressed later.