Fix the corrupted app/templates/auth/register.html file by replacing it with a proper Flask template:

{% extends "base.html" %}
{% block title %}Join RateRight{% endblock %}
{% block content %}
<div style="min-height: 100vh; background: #1e293b; padding-top: 80px;">
  <div class="container">
    <div class="row justify-content-center">
      <div class="col-md-5">
        <div class="card">
          <div class="card-body p-4">
            <h2 class="text-center mb-3">Join RateRight</h2>
            <p class="text-center text-muted mb-4">Get started in 30 seconds</p>
            
            <form method="POST" action="/register">
              <div class="mb-3">
                <input type="email" name="email" class="form-control" placeholder="Email" required>
              </div>
              <div class="mb-3">
                <input type="password" name="password" class="form-control" placeholder="Password" required>
              </div>
              <div class="mb-3">
                <input type="password" name="confirm_password" class="form-control" placeholder="Confirm Password" required>
              </div>
              
              <!-- Hidden fields for backend compatibility -->
              <input type="hidden" name="role" value="{{ request.args.get('role', 'worker') }}">
              <input type="hidden" name="first_name" value="User">
              <input type="hidden" name="last_name" value="Name">
              <input type="hidden" name="phone_number" value="0000000000">
              <input type="hidden" name="location" value="Sydney">
              <input type="hidden" name="abn_number" value="11111111111">
              
              <button type="submit" class="btn w-100" style="background: #2563eb; color: white;">
                Create Account as {{ request.args.get('role', 'worker')|title }}
              </button>
            </form>
            
            <p class="text-center mt-3">
              Already have an account? <a href="/login">Log in</a>
            </p>
          </div>
        </div>
      </div>
    </div>
  </div>
</div>
{% endblock %}

This replaces the corrupted file with a proper Flask template that extends base.html and provides a simple registration form.