diff --git a/gateway/scripts/chat_bridge.py b/gateway/scripts/chat_bridge.py
index 58c3d1a..b1f4e21 100644
--- a/gateway/scripts/chat_bridge.py
+++ b/gateway/scripts/chat_bridge.py
@@ -340,10 +340,13 @@ def _search_all_sessions(query: str, max_sessions: int = 5) -> str:
         return f"(搜索出错: {e})"
 
 
-# ── Serve session DB path ──
+# ── Serve session DB path (cross-platform) ──
 _SERVE_DB = os.path.join(
-    os.environ.get("USERPROFILE", "C:\\Users\\hmo"),
-    ".local", "share", "opencode", "opencode.db")
+    os.path.expanduser("~"), ".local", "share", "opencode", "opencode.db")
+if sys.platform == "win32" and not os.path.exists(_SERVE_DB):
+    _SERVE_DB = os.path.join(
+        os.environ.get("USERPROFILE", "C:\\Users\\hmo"),
+        ".local", "share", "opencode", "opencode.db")
 
 
 class SessionBridge: