fix(tools): fold Windows PRX suffix case

tools/import_audit.py

@@ -724,12 +724,19 @@ def system_library(name):
         if name:
             for suffix in (".sprx", ".suprx", ".debug_prx"):
                 if name.endswith(suffix):
-                    normalized = name.removesuffix(suffix) + ".prx"
+                    normalized = name[:-len(suffix)] + ".prx"
                     candidates = windows_names.get(normalized.casefold(), ())
                     if normalized in candidates:
                         return normalized
                     if len(candidates) == 1:
                         return next(iter(candidates))
+            if name.casefold().endswith(".prx"):
+                normalized = name[:-4] + ".prx"
+                candidates = windows_names.get(normalized.casefold(), ())
+                if normalized in candidates:
+                    return normalized
+                if len(candidates) == 1:
+                    return next(iter(candidates))
         return name
 
     def available(name):

tools/tests/test_import_audit.py

@@ -273,6 +273,25 @@ def test_windows_suffix_lookup_matches_provider_case_insensitively(self):
         self.assertEqual(data["library_mismatch"], 0)
         self.assertEqual(data["imports"][0]["providers"], ["LibSceA.prx"])
 
+    def test_windows_prx_suffix_lookup_folds_the_suffix_case(self):
+        work = self.work
+        (work.libs / "LibSceA.prx").write_bytes(build_pe(["AAAAAAAAAAA"]))
+        registry, result = work.root / "game.registry.json", work.root / "audit.json"
+        for suffix, expected_missing in (
+                (".sprx", False), (".SPRX", True), (".suprx", False), (".SUPRX", True),
+                (".debug_prx", False), (".DEBUG_PRX", True), (".prx", False), (".PRX", False)):
+            with self.subTest(suffix=suffix):
+                name = "libscea" + suffix
+                (work.modules / "guest.so").write_bytes(build_elf([], [name]))
+                write_registry(registry, [("AAAAAAAAAAA", name)])
+                registry.with_name("game.needed.json").write_text(json.dumps([name]))
+                code, _, err = work.run(registry, "--strict-providers", "--json", str(result))
+                self.assertEqual((code, err), (1 if expected_missing else 0, ""))
+                data = json.loads(result.read_text())
+                self.assertEqual(data["missing_libraries"], {name: 2} if expected_missing else {})
+                self.assertEqual(data["library_mismatch"], int(expected_missing))
+                self.assertEqual(data["imports"][0]["providers"], ["LibSceA.prx"])
+
     def test_elf_guest_dependencies_keep_literal_host_names(self):
         work = self.work
         (work.libs / "libSceA.prx").write_bytes(exporting("AAAAAAAAAAA"))