feat: add outfit output directory

tests/test_file_service.py

@@ -103,5 +103,63 @@ class TestGetOutputDir(unittest.TestCase):
             fs._is_dir_writable = orig
 
 
+class TestGetOutfitOutputDir(unittest.TestCase):
+    """get_outfit_output_dir() default location (docs/11 §9)."""
+
+    def setUp(self):
+        import tempfile
+        self.tmp = Path(tempfile.mkdtemp())
+        self._env = os.environ.get("CMBOT_DATA_DIR")
+        self._frozen = getattr(sys, "frozen", None)
+        os.environ["CMBOT_DATA_DIR"] = str(self.tmp / "data")
+        if hasattr(sys, "frozen"):
+            del sys.frozen
+        self._orig_app_dir = fs.get_app_dir
+
+    def tearDown(self):
+        import shutil
+        fs.get_app_dir = self._orig_app_dir
+        if self._env is None:
+            os.environ.pop("CMBOT_DATA_DIR", None)
+        else:
+            os.environ["CMBOT_DATA_DIR"] = self._env
+        if self._frozen is None:
+            if hasattr(sys, "frozen"):
+                del sys.frozen
+        else:
+            sys.frozen = self._frozen
+        shutil.rmtree(str(self.tmp), ignore_errors=True)
+
+    def test_dev_uses_project_outfit_folder(self):
+        app = self.tmp / "project"
+        app.mkdir()
+        fs.get_app_dir = lambda: app
+
+        self.assertEqual(fs.get_outfit_output_dir(), app / "穿搭图片")
+
+    def test_frozen_uses_install_root_outfit_folder(self):
+        app = self.tmp / "install" / "app"
+        app.mkdir(parents=True)
+        fs.get_app_dir = lambda: app
+        sys.frozen = True
+
+        self.assertEqual(fs.get_outfit_output_dir(), self.tmp / "install" / "穿搭图片")
+
+    def test_frozen_falls_back_when_not_writable(self):
+        app = self.tmp / "install" / "app"
+        app.mkdir(parents=True)
+        fs.get_app_dir = lambda: app
+        sys.frozen = True
+        orig = fs._is_dir_writable
+        fs._is_dir_writable = lambda p: False
+        try:
+            self.assertEqual(
+                fs.get_outfit_output_dir(),
+                Path(os.environ["CMBOT_DATA_DIR"]) / "output" / "穿搭图片",
+            )
+        finally:
+            fs._is_dir_writable = orig
+
+
 if __name__ == "__main__":
     unittest.main()