Fix task modal: key above title, parent/child key on kanban

1. Task key + parent breadcrumb moved ABOVE title in modal header
2. Kanban cards show 'TE-1 / TE-3' for subtasks
3. Close button aligned with key row

src/components/KanbanBoard.tsx

@@ -105,7 +105,10 @@ export default function KanbanBoard({ projectId, projectSlug }: Props) {
         <div className="w-2 h-2 rounded-full shrink-0"
              style={{ background: PRIORITY_COLORS[task.priority] || "#737373" }}
              title={task.priority} />
-        <span className="text-xs text-[var(--muted)]">{prefix}-{task.number}</span>
+        <span className="text-xs text-[var(--muted)]">
+          {task.parent_key && <span>{task.parent_key} / </span>}
+          {prefix}-{task.number}
+        </span>
         {task.assignee && (
           <span className="text-xs text-[var(--muted)] ml-auto">→ {task.assignee.slug}</span>
         )}

src/components/TaskModal.tsx

@@ -132,7 +132,28 @@ export default function TaskModal({ task, projectId: _projectId, projectSlug: _p
       >
         {/* Header */}
         <div className="p-4 md:p-6 border-b border-[var(--border)]">
-          <div className="flex items-start justify-between gap-2 mb-1">
+          <div className="flex items-center justify-between mb-1">
+            <div className="text-xs text-[var(--muted)]">
+              {task.parent_key && task.parent_id ? (
+                <span>
+                  <button
+                    onClick={() => { onClose(); setTimeout(() => onOpenTask?.(task.parent_id!), 100); }}
+                    className="text-[var(--accent)] hover:underline"
+                  >{task.parent_key}</button>
+                  <span className="mx-1">/</span>
+                </span>
+              ) : null}
+              {task.key}
+            </div>
+            <button
+              onClick={onClose}
+              className="text-[var(--muted)] hover:text-[var(--fg)] transition-colors text-xl leading-none cursor-pointer shrink-0"
+              title="Закрыть"
+            >
+              ✕
+            </button>
+          </div>
+          <div className="flex items-start gap-2">
           {editingTitle ? (
             <input
               autoFocus
@@ -156,25 +177,6 @@ export default function TaskModal({ task, projectId: _projectId, projectSlug: _p
               {title}
             </h2>
           )}
-            <button
-              onClick={onClose}
-              className="text-[var(--muted)] hover:text-[var(--fg)] transition-colors text-xl leading-none cursor-pointer shrink-0 mt-1"
-              title="Закрыть"
-            >
-              ✕
-            </button>
-          </div>
-          <div className="text-xs text-[var(--muted)]">
-            {task.parent_key && task.parent_id ? (
-              <span>
-                <button
-                  onClick={() => { onClose(); setTimeout(() => onOpenTask?.(task.parent_id!), 100); }}
-                  className="text-[var(--accent)] hover:underline"
-                >{task.parent_key}</button>
-                <span className="mx-1">/</span>
-              </span>
-            ) : null}
-            {task.key}
           </div>
         </div>