Improve task management by adding translations for all app features

Implement i18n support by adding new translation keys for Calendar, Kanban Board, and TaskCard components, and update existing translations in de.json and en.json.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ceced2fc-aa46-458d-ba87-ddd4b7bb1518
Replit-Commit-Checkpoint-Type: intermediate_checkpoint
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/659922a9-0087-461c-90dd-6d9a58b81d4d/ceced2fc-aa46-458d-ba87-ddd4b7bb1518/nn5bWKE

client/src/i18n/locales/en.json

@@ -62,22 +62,50 @@
     "play": "Start timer",
     "pause": "Pause timer",
     "edit": "Edit task",
+    "editTask": "Edit Task",
+    "stopTimer": "Stop Timer",
+    "startTimer": "Start Timer",
+    "markAsDone": "Mark as Done",
+    "startWorking": "Start Working",
+    "moveToTodo": "Move to Todo",
+    "reopenTask": "Reopen Task",
+    "deleteTask": "Delete Task",
+    "running": "running",
     "overdue": "Overdue",
     "timeTracked": "{{hours}}h {{minutes}}m tracked"
   },
   "calendar": {
-    "title": "Calendar View",
+    "title": "Calendar",
     "today": "Today",
+    "weekend": "Weekend",
+    "previousWeek": "Previous Week",
+    "moreItems": "+{{count}} more",
     "tasksDue": "{{count}} task due",
     "tasksDue_plural": "{{count}} tasks due"
   },
   "kanban": {
-    "title": "Kanban Board",
+    "title": "Board",
     "todo": "To Do",
     "inProgress": "In Progress",
     "done": "Done",
     "taskCount": "{{count}} task",
-    "taskCount_plural": "{{count}} tasks"
+    "taskCount_plural": "{{count}} tasks",
+    "filters": "Filters",
+    "labels": "Labels",
+    "priorities": "Priorities",
+    "filterByLabels": "Filter by Labels",
+    "filterByPriority": "Filter by Priority",
+    "clearAll": "Clear All",
+    "activeFilters": "Active filters:",
+    "noLabelsAvailable": "No labels available",
+    "traditional": "Traditional",
+    "weekly": "Weekly",
+    "monthly": "Monthly",
+    "allTasks": "All Tasks",
+    "weekOf": "Week of {{date}}",
+    "noTasksInColumn": "No tasks in {{column}}",
+    "noTasksInColumnForWeek": "No tasks in {{column}} for this week",
+    "noTasksInColumnForMonth": "No tasks in {{column}} for this month"
   },
   "settings": {
     "title": "Settings",