Release v0.1.4: Auto-complete parents and done task strikethrough

New Features:
1. Auto-Complete Parent Tasks
   - When all child tasks are marked as "done", parent automatically becomes "done"
   - Works recursively up the task hierarchy
   - Implemented in backend crud.py with check_and_update_parent_status()
   - Prevents manual status management for completed branches

2. Strikethrough for Done Tasks
   - Time estimates crossed out when task status is "done"
   - Visual indicator that work is completed
   - Applied in both TreeView and KanbanView

3. Updated Version
   - Bumped to v0.1.4 in App.jsx header

4. Documentation
   - Added comprehensive CHANGELOG.md
   - Updated README.md with v0.1.4 features
   - Documented all versions from v0.1.0 to v0.1.4
   - Added usage examples, architecture diagrams, troubleshooting

Technical Changes:
- backend/app/crud.py: Added check_and_update_parent_status() recursive function
- frontend/src/components/TreeView.jsx: Added line-through styling for done tasks
- frontend/src/components/KanbanView.jsx: Added line-through styling for done tasks
- frontend/src/App.jsx: Version updated to v0.1.4

This release completes the intelligent time tracking and auto-completion features,
making TESSERACT a fully-featured hierarchical task management system.

frontend/src/components/TreeView.jsx

@@ -166,7 +166,7 @@ function TaskNode({ task, projectId, onUpdate, level = 0 }) {
                 <div className="flex items-center gap-3 mt-1">
                   {/* Time estimate */}
                   {formatTimeWithTotal(task) && (
-                    <div className="flex items-center gap-1 text-xs text-gray-500">
+                    <div className={`flex items-center gap-1 text-xs text-gray-500 ${task.status === 'done' ? 'line-through' : ''}`}>
                       <Clock size={12} />
                       <span>{formatTimeWithTotal(task)}</span>
                     </div>