fix: address remaining review findings

- Fix detail.html to use assigned_technician_name (not .assigned_technician?.full_name)
- Remove double error toast in submitNote() catch block
- Replace wasteful API calls in CEO dashboard with units+data approach
- Remove QR Code option from reported_via dropdown (excluded per scope)

app/templates/tickets/detail.html

@@ -115,7 +115,7 @@
                             </div>
                             <div class="flex justify-between">
                                 <dt class="text-sm text-gray-500">Assigned To</dt>
-                                <dd class="text-sm font-medium text-gray-900" x-text="ticket.assigned_technician?.full_name || 'Unassigned'"></dd>
+                                <dd class="text-sm font-medium text-gray-900" x-text="ticket.assigned_technician_name || 'Unassigned'"></dd>
                             </div>
                             <div class="flex justify-between">
                                 <dt class="text-sm text-gray-500">Reporter</dt>
@@ -402,7 +402,7 @@
                     this.noteForm.note = '';
                     app().showToast('Note added', 'success');
                 } catch (e) {
-                    app().showToast(e.message, 'error');
+                    // No need to show error here — api() base method already shows it
                 } finally {
                     this.noteSubmitting = false;
                 }

app/templates/tickets/new.html

@@ -104,7 +104,7 @@
                         <option value="walk-in">Walk-in</option>
                         <option value="whatsapp">WhatsApp</option>
                         <option value="agent">Agent</option>
-                        <option value="qr">QR Code</option>
+                        <!-- QR Code excluded per Sprint 3 scope -->
                     </select>
                 </div>
             </div>