feat(kanban): Add ability to delete in-progress cards with auto agent stop

- Add delete button to in_progress cards that are not currently running
- Update handleDeleteFeature to stop running agents before deleting
- Show confirmation message mentioning agent will be stopped when card is running
- Add test utilities for delete in-progress feature testing

Generated with Claude Code

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.automaker/feature_list.json

@@ -30,7 +30,7 @@
     "category": "Kanban",
     "description": "when clicking a value in the typeahead, there is a bug where it does not close automatically, fix this",
     "steps": [],
-    "status": "in_progress"
+    "status": "verified"
   },
   {
     "id": "feature-1765260671085-7dgotl21h",
@@ -86,7 +86,7 @@
     "category": "Kanban",
     "description": "Ability to delete in progress cards which will auto stop their agents on delete",
     "steps": [],
-    "status": "in_progress"
+    "status": "verified"
   },
   {
     "id": "feature-1765262348401-hivjg6vuq",