feat: Add Terms of Service acceptance checkbox to registration

- Add checkbox requiring users to agree to Terms of Service and Privacy Policy
- Add TermsAcceptedAt field to ApplicationUser to track acceptance
- Link checkbox to actual /terms and /privacy pages
- Remove passive text that was using dead # links

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

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

src/RealCV.Web/Components/Pages/Account/Register.razor

@@ -71,6 +71,17 @@
                     <ValidationMessage For="() => _model.ConfirmPassword" class="text-danger small mt-1" />
                 </div>
 
+                <div class="mb-4">
+                    <div class="form-check">
+                        <InputCheckbox id="agreeToTerms" class="form-check-input" @bind-Value="_model.AgreeToTerms" />
+                        <label class="form-check-label" for="agreeToTerms">
+                            I agree to the <a href="/terms" target="_blank" class="text-decoration-none">Terms of Service</a>
+                            and have read the <a href="/privacy" target="_blank" class="text-decoration-none">Privacy Policy</a>
+                        </label>
+                    </div>
+                    <ValidationMessage For="() => _model.AgreeToTerms" class="text-danger small mt-1" />
+                </div>
+
                 <div class="d-grid mb-4">
                     <button type="submit" class="btn btn-primary btn-lg" disabled="@_isLoading">
                         @if (_isLoading)
@@ -89,13 +100,6 @@
                 </div>
             </EditForm>
 
-            <p class="text-center text-muted small mb-4">
-                By creating an account, you agree to our
-                <a href="#" class="text-decoration-none">Terms of Service</a>
-                and
-                <a href="#" class="text-decoration-none">Privacy Policy</a>
-            </p>
-
             <div class="auth-divider">
                 <span>Already have an account?</span>
             </div>
@@ -183,7 +187,8 @@
                 UserName = _model.Email,
                 Email = _model.Email,
                 Plan = Domain.Enums.UserPlan.Free,
-                ChecksUsedThisMonth = 0
+                ChecksUsedThisMonth = 0,
+                TermsAcceptedAt = DateTime.UtcNow
             };
 
             var result = await UserManager.CreateAsync(user, _model.Password);
@@ -222,5 +227,8 @@
         [System.ComponentModel.DataAnnotations.Required(ErrorMessage = "Please confirm your password")]
         [System.ComponentModel.DataAnnotations.Compare(nameof(Password), ErrorMessage = "Passwords do not match")]
         public string ConfirmPassword { get; set; } = string.Empty;
+
+        [System.ComponentModel.DataAnnotations.Range(typeof(bool), "true", "true", ErrorMessage = "You must agree to the Terms of Service")]
+        public bool AgreeToTerms { get; set; }
     }
 }