feat: add outfit output directory

src/services/file_service.py

@@ -91,8 +91,9 @@ def _is_dir_writable(path):
         return False
 
 
-# Default export folder name, placed next to Launcher.exe in the packaged layout.
+# Default export folder names, placed next to Launcher.exe in the packaged layout.
 _OUTPUT_DIR_NAME = "合并后的图片"
+_OUTFIT_OUTPUT_DIR_NAME = "穿搭图片"
 
 
 def get_output_dir():
@@ -114,6 +115,28 @@ def get_output_dir():
     return d
 
 
+def get_outfit_output_dir():
+    """Return the default AI outfit output directory as a Path.
+
+    Packaged: <install root>\\穿搭图片 (next to Launcher.exe, not inside app\\).
+    Falls back to <data_dir>/output/穿搭图片 if the preferred location is not
+    writable. Development: <project root>/穿搭图片.
+
+    User-selected outfit_output_dir still takes precedence in the UI.
+    """
+    if getattr(sys, "frozen", False):
+        candidate = get_app_dir().parent / _OUTFIT_OUTPUT_DIR_NAME
+    else:
+        candidate = get_app_dir() / _OUTFIT_OUTPUT_DIR_NAME
+
+    if _is_dir_writable(candidate):
+        return candidate
+
+    d = get_data_dir() / "output" / _OUTFIT_OUTPUT_DIR_NAME
+    d.mkdir(parents=True, exist_ok=True)
+    return d
+
+
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