Add task priority enum and rename priority to rank

The existing integer priority field represents positional ordering
within a state, not semantic importance. Rename it to rank and
introduce a new priority field with enum values URGENT, HIGH,
MEDIUM and LOW across the entire stack.

Rank is now scoped to (state, priority) so tasks are ordered
within each priority group. A generated priority_rank column
combines both fields into a single sortable integer for cursor
pagination.

Dragging a task across priority groups updates its priority
automatically based on the drop position neighbors. The backend
first moves the task to the new group then repositions it at the
target rank.

The migration defaults existing rows to MEDIUM priority and
backfills ranks per (state, priority) group.

Signed-off-by: Sacha Al Himdani <sacha@getprobo.com>

apps/console/src/components/tasks/TaskFormDialog.tsx

@@ -23,7 +23,10 @@ import {
   DurationPicker,
   Input,
   Label,
+  Option,
+  PriorityLevel,
   PropertyRow,
+  Select,
   Textarea,
   useDialogRef,
 } from "@probo/ui";
@@ -47,6 +50,7 @@ const taskFragment = graphql`
     id
     description
     name
+    priority
     timeEstimate
     deadline
     assignedTo {
@@ -87,9 +91,12 @@ export const taskUpdateMutation = graphql`
   }
 `;
 
+export const taskPriorities = ["URGENT", "HIGH", "MEDIUM", "LOW"] as const;
+
 const createTaskSchema = z.object({
   name: z.string().min(1),
   description: z.string().optional().nullable(),
+  priority: z.enum(taskPriorities),
   timeEstimate: z.string().optional().nullable(),
   assignedToId: z.string().optional().nullable(),
   measureId: z.preprocess(
@@ -102,6 +109,7 @@ const createTaskSchema = z.object({
 const updateTaskSchema = z.object({
   name: z.string().min(1),
   description: z.string().optional().nullable(),
+  priority: z.enum(taskPriorities),
   timeEstimate: z.string().optional().nullable(),
   assignedToId: z.preprocess(
     val => (val === "" || val == null ? null : val),
@@ -120,10 +128,11 @@ type Props = {
   connection?: string;
   ref?: DialogRef;
   measureId?: string;
+  onCompleted?: () => void;
 };
 
 export default function TaskFormDialog(props: Props) {
-  const { children, connection, ref, task: taskKey, measureId } = props;
+  const { children, connection, ref, task: taskKey, measureId, onCompleted } = props;
   const { __ } = useTranslate();
   const newRef = useDialogRef();
   const dialogRef = ref ?? newRef;
@@ -145,6 +154,7 @@ export default function TaskFormDialog(props: Props) {
       defaultValues: {
         name: task?.name ?? "",
         description: task?.description ?? "",
+        priority: task?.priority ?? "MEDIUM",
         timeEstimate: task?.timeEstimate ?? "",
         assignedToId: task?.assignedTo?.id ?? "",
         measureId: task?.measure?.id ?? measureId ?? "",
@@ -160,12 +170,16 @@ export default function TaskFormDialog(props: Props) {
             taskId: task.id,
             name: data.name,
             description: data.description || null,
+            priority: data.priority,
             timeEstimate: data.timeEstimate || null,
             deadline: formatDatetime(data.deadline) ?? null,
             assignedToId: data.assignedToId ?? null,
             measureId: data.measureId || null,
           },
         },
+        onCompleted: (_response, errors) => {
+          if (!errors) onCompleted?.();
+        },
       });
     } else {
       await mutate({
@@ -174,6 +188,7 @@ export default function TaskFormDialog(props: Props) {
             organizationId,
             name: data.name,
             description: data.description || null,
+            priority: data.priority,
             timeEstimate: data.timeEstimate || null,
             deadline: formatDatetime(data.deadline) ?? null,
             assignedToId: data.assignedToId || null,
@@ -182,8 +197,11 @@ export default function TaskFormDialog(props: Props) {
           connections: [connection!],
         },
         onCompleted: (_response, errors) => {
-          if (!errors && data.measureId) {
-            updateStoreCounter(relayEnv, data.measureId, "tasks(first:0)", 1);
+          if (!errors) {
+            if (data.measureId) {
+              updateStoreCounter(relayEnv, data.measureId, "tasks(first:0)", 1);
+            }
+            onCompleted?.();
           }
         },
       });
@@ -224,6 +242,46 @@ export default function TaskFormDialog(props: Props) {
           {/* Properties form */}
           <div className="py-5 px-6 bg-subtle">
             <Label>{__("Properties")}</Label>
+            <PropertyRow
+              label={__("Priority")}
+              error={formState.errors.priority?.message}
+            >
+              <Controller
+                name="priority"
+                control={control}
+                render={({ field }) => (
+                  <Select
+                    value={field.value}
+                    onValueChange={field.onChange}
+                  >
+                    <Option value="URGENT">
+                      <span className="flex items-center gap-2">
+                        <PriorityLevel level="URGENT" />
+                        {__("Urgent")}
+                      </span>
+                    </Option>
+                    <Option value="HIGH">
+                      <span className="flex items-center gap-2">
+                        <PriorityLevel level="HIGH" />
+                        {__("High")}
+                      </span>
+                    </Option>
+                    <Option value="MEDIUM">
+                      <span className="flex items-center gap-2">
+                        <PriorityLevel level="MEDIUM" />
+                        {__("Medium")}
+                      </span>
+                    </Option>
+                    <Option value="LOW">
+                      <span className="flex items-center gap-2">
+                        <PriorityLevel level="LOW" />
+                        {__("Low")}
+                      </span>
+                    </Option>
+                  </Select>
+                )}
+              />
+            </PropertyRow>
             <PropertyRow
               label={__("Assigned to")}
               error={formState.errors.assignedToId?.message}