Add next_due_date editing to admin task form

- Add NextDueDate field to UpdateTaskRequest DTO
- Add handler logic to process next_due_date updates
- Add next_due_date input field to task edit form
- Update TypeScript models with next_due_date field

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

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

admin/src/app/(dashboard)/tasks/[id]/edit/page.tsx

@@ -100,6 +100,7 @@ export default function EditTaskPage() {
         status_id: task.status_id,
         frequency_id: task.frequency_id,
         due_date: task.due_date,
+        next_due_date: task.next_due_date,
         estimated_cost: task.estimated_cost,
         actual_cost: task.actual_cost,
         contractor_id: task.contractor_id,
@@ -376,7 +377,7 @@ export default function EditTaskPage() {
             <CardDescription>Due date and cost information</CardDescription>
           </CardHeader>
           <CardContent className="space-y-4">
-            <div className="grid grid-cols-3 gap-4">
+            <div className="grid grid-cols-2 gap-4">
               <div className="space-y-2">
                 <Label htmlFor="due_date">Due Date</Label>
                 <Input
@@ -386,6 +387,17 @@ export default function EditTaskPage() {
                   onChange={(e) => updateField('due_date', e.target.value || undefined)}
                 />
               </div>
+              <div className="space-y-2">
+                <Label htmlFor="next_due_date">Next Due Date</Label>
+                <Input
+                  id="next_due_date"
+                  type="date"
+                  value={formData.next_due_date || ''}
+                  onChange={(e) => updateField('next_due_date', e.target.value || undefined)}
+                />
+              </div>
+            </div>
+            <div className="grid grid-cols-2 gap-4">
               <div className="space-y-2">
                 <Label htmlFor="estimated_cost">Estimated Cost ($)</Label>
                 <Input

admin/src/types/models.ts

@@ -242,6 +242,7 @@ export interface UpdateTaskRequest {
   status_id?: number;
   frequency_id?: number;
   due_date?: string;
+  next_due_date?: string;
   estimated_cost?: number;
   actual_cost?: number;
   contractor_id?: number;

internal/admin/dto/requests.go

@@ -135,6 +135,7 @@ type UpdateTaskRequest struct {
 	StatusID      *uint    `json:"status_id"`
 	FrequencyID   *uint    `json:"frequency_id"`
 	DueDate       *string  `json:"due_date"`
+	NextDueDate   *string  `json:"next_due_date"`
 	EstimatedCost *float64 `json:"estimated_cost"`
 	ActualCost    *float64 `json:"actual_cost"`
 	ContractorID  *uint    `json:"contractor_id"`

internal/admin/handlers/task_handler.go

@@ -221,6 +221,13 @@ func (h *AdminTaskHandler) Update(c *gin.Context) {
 			updates["due_date"] = dueDate
 		}
 	}
+	if req.NextDueDate != nil {
+		if *req.NextDueDate == "" {
+			updates["next_due_date"] = nil
+		} else if nextDueDate, err := time.Parse("2006-01-02", *req.NextDueDate); err == nil {
+			updates["next_due_date"] = nextDueDate
+		}
+	}
 	if req.EstimatedCost != nil {
 		updates["estimated_cost"] = decimal.NewFromFloat(*req.EstimatedCost)
 	}