feat: add cancelled status for archiving discarded entries

Entries in On Docket or In Progress can be moved to Cancelled via the
right-click context menu. Cancelled entries are preserved on disk but
hidden from the board.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/my_memory/board_window.py

@@ -146,6 +146,11 @@ class EntryCard(QFrame):
         for status in EntryStatus:
             if status == self._entry.status:
                 continue
+            # Only Docket and In Progress cards can be cancelled
+            if status == EntryStatus.CANCELLED and self._entry.status not in (
+                EntryStatus.DOCKET, EntryStatus.IN_PROGRESS,
+            ):
+                continue
             action = menu.addAction(f"Move to {_label_for(status)}")
             action.triggered.connect(lambda _checked, s=status: self._move_to(s))
         menu.exec(self.mapToGlobal(pos))
@@ -157,6 +162,7 @@ def _label_for(status: EntryStatus) -> str:
         EntryStatus.DOCKET: "On Docket",
         EntryStatus.IN_PROGRESS: "In Progress",
         EntryStatus.COMPLETE: "Complete",
+        EntryStatus.CANCELLED: "Cancelled",
     }[status]
 
 

src/my_memory/models.py

@@ -18,6 +18,7 @@ class EntryStatus(str, Enum):
     DOCKET = "docket"
     IN_PROGRESS = "in_progress"
     COMPLETE = "complete"
+    CANCELLED = "cancelled"
 
 
 class Entry(BaseModel):