fix: hide all badges when no primary badge is selected

Update the badge display logic so that if a user hasn't selected
a primary badge, no badges are shown at all (instead of showing
all badges).

Changes:
- Remove else clause from profile badge section (only show badges-section div if primaryBadge is set)
- Remove else clause from comment badge display
- Update help text from "show all" to "hide all" in settings
- Update help text in admin profile edit modal to match
- Clarify that badge selection applies to both profile and comments

apps/frontend/src/app/components/admin-reports/admin-reports.component.ts

@@ -683,7 +683,7 @@ import { ProfileReportWithUsers, CommentReportWithDetails, ReportStatus, ReportR
                       [(ngModel)]="profileEditForm.primaryBadge"
                       class="form-control"
                     >
-                      <option [ngValue]="undefined">None (show all badges)</option>
+                      <option [ngValue]="undefined">None (hide all badges)</option>
                       @if (editingProfile()?.profile?.badges.isStaff) {
                         <option [ngValue]="PrimaryBadge.STAFF">Staff</option>
                       }
@@ -697,7 +697,7 @@ import { ProfileReportWithUsers, CommentReportWithDetails, ReportStatus, ReportR
                         <option [ngValue]="PrimaryBadge.DISCORD">Discord Member</option>
                       }
                     </select>
-                    <small class="form-help">Choose one badge to display on profile, or show all</small>
+                    <small class="form-help">Choose one badge to display on profile and comments</small>
                   </div>
                 </div>