Add missing translations for project templates and task details

Adds new translation keys for project templates and task details in `en.json` and `de.json`, and updates `ProjectTemplate.tsx` to use these translations.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: ceced2fc-aa46-458d-ba87-ddd4b7bb1518
Replit-Commit-Checkpoint-Type: full_checkpoint
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client/src/i18n/locales/en.json

@@ -253,7 +253,14 @@
     "projectDescriptionPlaceholder": "Enter project description (optional)",
     "plannedEndDate": "Planned End Date",
     "selectPlannedEndDate": "Select planned end date",
-    "clearDate": "Clear date"
+    "clearDate": "Clear date",
+    "noTasksInProject": "No tasks in this project yet. Click \"Add Task\" to get started.",
+    "closedProjects": "Closed Projects",
+    "viewTaskDetails": "View task details",
+    "editTaskTooltip": "Edit task",
+    "removeTask": "Remove task",
+    "tracked": "tracked",
+    "notesLabel": "Notes"
   },
   "timeCompletion": {
     "title": "Task Completed!",