i18n: integrate translations into components

- StatusBadge, TaskForm, tasks page use i18n hook
- All 4 language files complete (cs, he, ru, ua)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/tasks/components/TaskModal.tsx

@@ -2,6 +2,7 @@
 
 import { useEffect, useState, useCallback } from "react";
 import { Group, Task } from "@/lib/api";
+import { useTranslation } from "@/lib/i18n";
 import TaskForm from "@/components/TaskForm";
 
 interface TaskModalProps {
@@ -12,6 +13,7 @@ interface TaskModalProps {
 
 export default function TaskModal({ groups, onSubmit, onClose }: TaskModalProps) {
   const [visible, setVisible] = useState(false);
+  const { t } = useTranslation();
 
   const handleClose = useCallback(() => {
     setVisible(false);
@@ -41,7 +43,7 @@ export default function TaskModal({ groups, onSubmit, onClose }: TaskModalProps)
       className="fixed inset-0 z-50 flex items-end sm:items-center justify-center"
       role="dialog"
       aria-modal="true"
-      aria-label="Nový úkol"
+      aria-label={t("tasks.newTask")}
     >
       {/* Backdrop */}
       <div
@@ -65,11 +67,11 @@ export default function TaskModal({ groups, onSubmit, onClose }: TaskModalProps)
         </div>
 
         <div className="flex items-center justify-between mb-5">
-          <h2 className="text-lg font-semibold">Nový úkol</h2>
+          <h2 className="text-lg font-semibold">{t("tasks.newTask")}</h2>
           <button
             onClick={handleClose}
             className="p-2 rounded-lg text-gray-400 hover:text-gray-600 dark:hover:text-gray-200 hover:bg-gray-100 dark:hover:bg-gray-800 transition-colors min-w-[44px] min-h-[44px] flex items-center justify-center"
-            aria-label="Zavřít"
+            aria-label={t("tasks.close")}
           >
             <svg
               xmlns="http://www.w3.org/2000/svg"
@@ -90,7 +92,6 @@ export default function TaskModal({ groups, onSubmit, onClose }: TaskModalProps)
           groups={groups}
           onSubmit={onSubmit}
           onCancel={handleClose}
-          submitLabel="Vytvořit"
         />
       </div>
     </div>