fix: 6 bug fixes - timezone CST, knowledge_ids mismatch, skill uninstall, dashboard stats, chat knowledge retrieval, skill selection

backend/python/app/api/market.py

@@ -359,7 +359,9 @@ def uninstall_app(
     db: Session = Depends(get_db),
     current_user: User = Depends(get_current_user),
 ):
-    """卸载应用 - 删除当前用户的安装记录（按用户隔离）"""
+    """卸载应用 - 删除当前用户的安装记录（按用户隔离）
+    修复: 当没有AppInstallation记录时(如导入的技能)，仍然允许卸载
+    """
     app = db.query(MarketApp).filter(MarketApp.id == app_id).first()
     if not app:
         raise HTTPException(status_code=404, detail="应用不存在")
@@ -368,22 +370,26 @@ def uninstall_app(
     installation = db.query(AppInstallation).filter(
         and_(AppInstallation.app_id == app_id, AppInstallation.user_id == current_user.id)
     ).first()
-    if not installation:
-        raise HTTPException(status_code=400, detail="应用未安装")
 
-    # 删除安装记录
-    db.delete(installation)
+    # 修复: 即使没有安装记录也允许卸载（导入的技能可能没有安装记录）
+    if installation:
+        db.delete(installation)
 
-    # 问题4修复: 将AppPurchase状态从installed重置为purchased
-    purchase = db.query(AppPurchase).filter(
-        and_(AppPurchase.app_id == app_id, AppPurchase.user_id == current_user.id)
-    ).first()
-    if purchase and purchase.status == "installed":
-        purchase.status = "purchased"
+        # 将AppPurchase状态从installed重置为purchased
+        purchase = db.query(AppPurchase).filter(
+            and_(AppPurchase.app_id == app_id, AppPurchase.user_id == current_user.id)
+        ).first()
+        if purchase and purchase.status == "installed":
+            purchase.status = "purchased"
+
+        # 更新应用安装量（减1，最小为0）
+        if app.install_count and app.install_count > 0:
+            app.install_count = app.install_count - 1
+
+    # 将应用状态标记为未安装(对于skill类型)
+    if app.type == "skill" and app.is_active:
+        app.is_active = False
 
-    # 更新应用安装量（减1，最小为0）
-    if app.install_count and app.install_count > 0:
-        app.install_count = app.install_count - 1
     app.updated_at = datetime.now()
 
     db.commit()