Replace status_id with in_progress boolean across mobile apps

- Remove TaskStatus model and status_id foreign key references
- Add in_progress boolean field to task models and forms
- Update TaskApi to use dedicated POST endpoints for task actions:
  - POST /tasks/:id/cancel/ instead of PATCH with is_cancelled
  - POST /tasks/:id/uncancel/
  - POST /tasks/:id/archive/
  - POST /tasks/:id/unarchive/
- Fix iOS TaskViewModel to use error-first pattern for Kotlin-Swift
  generic type bridging issues
- Update iOS callback signatures to pass full TaskResponse instead
  of just taskId to avoid stale closure lookups
- Add in_progress localization strings
- Update widget preview data to use inProgress boolean

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

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

composeApp/src/commonMain/kotlin/com/example/casera/ui/components/AddTaskDialog.kt

@@ -449,7 +449,7 @@ fun AddTaskDialog(
                                 categoryId = if (category.id > 0) category.id else null,
                                 frequencyId = if (frequency.id > 0) frequency.id else null,
                                 priorityId = if (priority.id > 0) priority.id else null,
-                                statusId = null,
+                                inProgress = false,
                                 dueDate = dueDate,
                                 estimatedCost = estimatedCost.ifBlank { null }?.toDoubleOrNull()
                             )

composeApp/src/commonMain/kotlin/com/example/casera/ui/components/task/TaskCard.kt

@@ -18,7 +18,6 @@ import com.example.casera.models.TaskDetail
 import com.example.casera.models.TaskCategory
 import com.example.casera.models.TaskPriority
 import com.example.casera.models.TaskFrequency
-import com.example.casera.models.TaskStatus
 import com.example.casera.models.TaskCompletion
 import com.example.casera.util.DateUtils
 import org.jetbrains.compose.ui.tooling.preview.Preview
@@ -108,21 +107,15 @@ fun TaskCard(
                         )
                     }
 
-                    // Status badge with semantic colors
-                    if (task.status != null) {
-                        val statusColor = when (task.status.name.lowercase()) {
-                            "completed" -> MaterialTheme.colorScheme.secondary
-                            "in_progress" -> MaterialTheme.colorScheme.tertiary
-                            "pending" -> MaterialTheme.colorScheme.tertiary
-                            "cancelled" -> MaterialTheme.colorScheme.onSurfaceVariant
-                            else -> MaterialTheme.colorScheme.onSurfaceVariant
-                        }
+                    // In Progress badge
+                    if (task.inProgress) {
+                        val statusColor = MaterialTheme.colorScheme.tertiary
                         Surface(
                             color = statusColor.copy(alpha = 0.15f),
                             shape = RoundedCornerShape(12.dp)
                         ) {
                             Text(
-                                text = task.status.name.replace("_", " ").uppercase(),
+                                text = "IN PROGRESS",
                                 modifier = Modifier.padding(horizontal = 12.dp, vertical = 6.dp),
                                 style = MaterialTheme.typography.labelSmall,
                                 color = statusColor
@@ -604,7 +597,7 @@ fun TaskCardPreview() {
                 frequency = TaskFrequency(
                     id = 1, name = "monthly", days = 30
                 ),
-                status = TaskStatus(id = 1, name = "pending"),
+                inProgress = false,
                 dueDate = "2024-12-15",
                 estimatedCost = 150.00,
                 createdAt = "2024-01-01T00:00:00Z",