feat: Add Binance setup guide with tutorial modal

[0xEmberZz]

• Add Binance configuration tutorial image (guide.png)
• Implement "View Guide" button in exchange configuration modal
• Button only appears when configuring Binance exchange

[github-actions]

🤖 Advisory Check Results

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📋 PR Information

Title Format: ⚠️ Suggestion - Consider using type(scope): description

Recommended format

Valid types: feat, fix, docs, style, refactor, perf, test, chore, ci, security, build

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• feat(trader): add new trading strategy
• fix(api): resolve authentication issue
• docs: update README

PR Size: 🟢 Small (86 lines: +67 -19)

🔧 Backend Checks

Go Formatting: ⚠️ Needs formatting

Files needing formatting

api/server.go
config/database.go
main.go
manager/trader_manager.go

Go Vet: ✅ Good
Tests: ✅ Passed

Fix locally:

go fmt ./...      # Format code
go vet ./...      # Check for issues
go test ./...     # Run tests

⚛️ Frontend Checks

Build & Type Check: ✅ Success

Fix locally:

cd web
npm run build  # Test build (includes type checking)

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