fix: file nicaiemu and coolbaremu as one system

The buildbot serves nicaiemu_libretro (frozen at 4c9b73f7, last built
2026-10-16 05:15) beside coolbaremu_libretro. They are two builds: each
reads its own orientation list from the system directory, so both
profiles stay, each with its own core name. Both read the same .cbe
archives from the same workspace, which builds a standalone binary at
both revisions: one system id and one build type for the two.

tests/test_profile_sync.py

@@ -2710,6 +2710,36 @@ class TestDeliberatelyFrozenPin(TestBuildReport):
             with self.subTest(profile=name):
                 self.assertTrue(str(profiles[name].get("pin_frozen") or "").strip())
 
+    def test_a_frozen_build_files_its_content_with_the_build_that_follows(self):
+        # AloysHF/NicaiEmu became AloysHF/CoolbarEmu (PR #78). The buildbot
+        # still serves nicaiemu_libretro, built from 4c9b73f7, beside
+        # coolbaremu_libretro. Both read the same .cbe archives, yet the two
+        # profiles named two systems and two build types, so --system for
+        # either missed the other core.
+        from common import load_emulator_profiles  # noqa: PLC0415
+
+        root = Path(__file__).resolve().parents[1] / "emulators"
+        profiles = load_emulator_profiles(str(root))
+        by_source: dict[str, list[str]] = {}
+        for name, profile in profiles.items():
+            source = profile.get("source")
+            if isinstance(source, str):
+                by_source.setdefault(source.rstrip("/").lower(), []).append(name)
+        pairs = 0
+        for names in by_source.values():
+            frozen = [n for n in names if str(profiles[n].get("pin_frozen") or "").strip()]
+            live = [n for n in names if n not in frozen]
+            for old in frozen:
+                for new in live:
+                    pairs += 1
+                    with self.subTest(frozen=old, live=new):
+                        self.assertEqual(
+                            sorted(profiles[old].get("systems") or []),
+                            sorted(profiles[new].get("systems") or []),
+                        )
+                        self.assertEqual(profiles[old].get("type"), profiles[new].get("type"))
+        self.assertGreaterEqual(pairs, 3)
+
     def test_an_ordinary_profile_is_unaffected(self):
         self.files[("pinsha", "a.c")] = ["x", "hit"]
         self.files[("headsha", "a.c")] = ["pad", "x", "hit"]