Add soft delete and trash functionality for tasks

[rightson]

Summary

Implement a soft delete system for tasks with a dedicated trash view, allowing users to recover deleted tasks before permanent deletion.

Key Changes

Backend (Server)

• Modified DELETE /tasks/:id to perform soft delete by setting deletedAt timestamp instead of removing the record
• Added POST /tasks/:id/restore endpoint to restore trashed tasks by clearing the deletedAt field
• Added DELETE /tasks/:id/permanent endpoint for permanent deletion from trash
• Added GET /tasks/project/:projectId/trash endpoint to fetch all trashed tasks for a project
• Updated GET /tasks/project/:projectId to exclude soft-deleted tasks (where deletedAt is null)
• Added deletedAt column to tasks table schema and migration

Frontend (Client)

• Created new TrashView component displaying trashed tasks with restore and permanent delete actions
• Updated TaskCard interface to include optional deletedAt field
• Extended useTaskStore with:
  • trashedTasks state to track deleted tasks
  • fetchTrashedTasks() to load trashed tasks for current project
  • restoreTask() to recover a task from trash
  • permanentDeleteTask() to permanently remove a task
• Added trash button to ProjectSelector component that opens the trash view
• Updated App.tsx to manage trash view visibility state
• Changed delete confirmation message in TaskModal from "Delete this task?" to "Move this task to trash?"

Implementation Details

• Soft deletes use ISO timestamp strings in the deletedAt column
• Trashed tasks are visually separated and show deletion date
• Restore action moves tasks back to active list and clears deletedAt
• Permanent delete is irreversible and requires confirmation
• Trash view is modal-based with overlay and displays task priority and color indicators

https://claude.ai/code/session_01QPG5sRrFdNju5qivq3uWwK