Hide backups of earlier guests that reused the VMID

Proxmox ties backups to the VMID only, so a deleted guest's backups
were listed under the new guest with that VMID. CT 104 showed planka
backups next to debian's, and VM 108 showed vaultwarden backups.

Backups whose notes name another guest are now hidden by default. The
notes come from the job's {{guestname}}, so "debian (manual)" still
counts as debian. A line says how many are hidden, and the a key shows
them, marked "(earlier guest)". Backups without notes are always
shown.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tests/test_app.py

@@ -1271,3 +1271,48 @@ async def test_info_uses_live_status_not_table_status(fake):
     async with app.run_test() as pilot:
         await open_info(app, pilot, down=1)
         assert fake.iface_calls == [100]
+
+
+# --- backups of earlier guests with a reused VMID ------------------------------
+
+EARLIER = {"volid": "truenas-backup:backup/vzdump-qemu-108-planka.vma.zst", "ctime": T_OLD - 60,
+           "size": 2**30, "format": "vma.zst", "notes": "planka", "storage": "truenas-backup"}  # fmt: skip
+
+
+def backup_notes(app):
+    t = app.screen.query_one("#backups", DataTable)
+    return [cells(t, i)[4] for i in range(t.row_count)]
+
+
+async def test_backups_of_earlier_guest_hidden_by_default_with_hint(fake):
+    # VMIDs are reused: a deleted guest's backups (notes = its name) are not this guest's
+    fake.backup_list = [*BACKUPS, EARLIER]
+    app = make_app()
+    async with app.run_test() as pilot:
+        await open_info(app, pilot)
+        assert "planka" not in backup_notes(app)
+        assert backup_notes(app) == [
+            "docker (manual)",
+            "",
+        ]  # own name and no notes stay
+        assert "1" in str(app.screen.query_one("#hidden", Static).render())
+
+
+async def test_a_toggles_showing_earlier_guest_backups(fake):
+    fake.backup_list = [*BACKUPS, EARLIER]
+    app = make_app()
+    async with app.run_test() as pilot:
+        await open_info(app, pilot)
+        await pilot.press("a")
+        await pilot.pause()
+        assert any("planka" in n for n in backup_notes(app))
+        await pilot.press("a")
+        await pilot.pause()
+        assert not any("planka" in n for n in backup_notes(app))
+
+
+async def test_no_hint_when_nothing_hidden(fake):
+    app = make_app()
+    async with app.run_test() as pilot:
+        await open_info(app, pilot)
+        assert str(app.screen.query_one("#hidden", Static).render()).strip() == ""