feat(trash): MCP delete tools soft-delete via trash; add delete_task/project/milestone

src/fabledassistant/mcp/tools/milestones.py

@@ -13,6 +13,7 @@ from __future__ import annotations
 
 from fabledassistant.mcp._context import current_user_id
 from fabledassistant.services import milestones as milestones_svc
+from fabledassistant.services import trash as trash_svc
 
 
 async def list_milestones(project_id: int) -> dict:
@@ -86,10 +87,22 @@ async def update_milestone(
     return milestone.to_dict()
 
 
+async def delete_milestone(milestone_id: int) -> dict:
+    """Move a milestone to the trash (recoverable). Its tasks go with it as one batch.
+    Restore via restore(batch_id)."""
+    uid = current_user_id()
+    batch = await trash_svc.delete(uid, "milestone", milestone_id)
+    if batch is None:
+        raise ValueError(f"milestone {milestone_id} not found")
+    return {"deleted_batch_id": batch,
+            "message": f"Milestone {milestone_id} + its tasks moved to trash. Restore with restore('{batch}')."}
+
+
 def register(mcp) -> None:
     for fn in (
         list_milestones,
         create_milestone,
         update_milestone,
+        delete_milestone,
     ):
         mcp.tool(name=fn.__name__)(fn)