core/tools+cli/display: name the trash in the delete confirm

The box asked "delete path 'x'", which reads as final even now that it is not.
It now says "move path 'x' to the system trash" — and "delete path 'x'
permanently" when the path really is destroyed: an explicit `permanent=true`, a
host that turned `[trash] enabled` off, or a scratch path under the OS temporary
directory. The classifier resolves the path to answer that, and falls back to
the trash wording when path policy will refuse the call anyway.

The pretty line follows: a delete that landed in the trash prints `(to trash)`
instead of `(done)`, so a session's transcript still shows which deletes could
be undone.

tests/test_tools/test_danger.py

@@ -4,6 +4,7 @@ from pathlib import Path
 
 from plyngent.agent import DangerReason
 from plyngent.tools.danger import classify_danger
+from plyngent.tools.workspace import set_trash_enabled
 
 
 def _reason(name: str, args: dict[str, object]) -> str | None:
@@ -22,11 +23,28 @@ def _danger(name: str, args: dict[str, object]) -> DangerReason:
 
 
 def test_classify_delete_and_move() -> None:
-    assert _reason("delete_path", {"path": "a.txt"}) == "delete path 'a.txt'"
+    # No bound workspace here, so the confirm falls back to the default wording.
+    assert _reason("delete_path", {"path": "a.txt"}) == "move path 'a.txt' to the system trash"
     assert "recursively" in (_reason("delete_path", {"path": "d", "recursive": True}) or "")
     assert "move" in (_reason("move_path", {"src": "a", "dst": "b"}) or "")
 
 
+def test_classify_permanent_delete() -> None:
+    assert _reason("delete_path", {"path": "a.txt", "permanent": True}) == "delete path 'a.txt' permanently"
+
+
+def test_a_scratch_path_is_announced_as_permanent(workspace: object) -> None:
+    """The confirm says what will happen: the temp workspace is never trashed."""
+    del workspace
+    assert _reason("delete_path", {"path": "a.txt"}) == "delete path 'a.txt' permanently"
+
+
+def test_the_host_switch_is_announced_as_permanent(workspace: object) -> None:
+    del workspace
+    set_trash_enabled(enabled=False)
+    assert _reason("delete_path", {"path": "a.txt"}) == "delete path 'a.txt' permanently"
+
+
 def test_classify_copy() -> None:
     # Without overwrite flag, copy is not soft-confirmed.
     assert _reason("copy_path", {"src": "a", "dst": "b"}) is None