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

backend/python/app/api/admin/dashboard.py

@@ -10,10 +10,13 @@ from ...models import (
 )
 from ...auth import get_current_admin
 from ...middleware.log_service import LogService
-from datetime import datetime, date
+from datetime import datetime, date, timezone, timedelta
 
 router = APIRouter()
 
+# CST timezone (UTC+8)
+CST_TZ = timezone(timedelta(hours=8))
+
 
 @router.get("/stats")
 async def get_dashboard_stats(
@@ -21,7 +24,11 @@ async def get_dashboard_stats(
     db: Session = Depends(get_db),
 ):
     """获取管理员仪表盘统计数据"""
-    today = date.today()
+    # Use CST timezone for "today" since container uses UTC but users are in CST
+    now_cst = datetime.now(CST_TZ)
+    today_cst = now_cst.date()
+    # Convert CST today start to UTC for DB comparison
+    today_start_utc = datetime(now_cst.year, now_cst.month, now_cst.day, 0, 0, 0, tzinfo=CST_TZ).astimezone(timezone.utc).replace(tzinfo=None)
 
     active_users = db.query(func.count(User.id)).filter(
         User.status == "active"
@@ -31,12 +38,13 @@ async def get_dashboard_stats(
         AIModel.is_enabled == True
     ).scalar() or 0
 
+    # Use range comparison instead of func.date() for timezone-correct results
     today_orders = db.query(func.count(Order.id)).filter(
-        func.date(Order.created_at) == today
+        Order.created_at >= today_start_utc
     ).scalar() or 0
 
     today_tokens = db.query(func.sum(TokenUsageLog.total_tokens)).filter(
-        func.date(TokenUsageLog.created_at) == today
+        TokenUsageLog.created_at >= today_start_utc
     ).scalar() or 0
 
     total_tokens = db.query(func.sum(TokenUsageLog.total_tokens)).scalar() or 0
@@ -47,6 +55,7 @@ async def get_dashboard_stats(
         "today_orders": today_orders,
         "today_tokens": int(today_tokens),
         "total_tokens": int(total_tokens),
+        "server_time": now_cst.isoformat(),
     }
 
 
@@ -69,12 +78,20 @@ async def get_recent_logs(
             "target_id": log.target_id,
             "detail": log.detail,
             "ip": log.ip,
-            "created_at": log.created_at.isoformat() if log.created_at else None,
+            "created_at": _format_cst(log.created_at),
         }
         for log in logs
     ]
 
 
+def _format_cst(dt_value):
+    """Format UTC naive datetime to CST ISO string"""
+    if dt_value is None:
+        return None
+    utc_dt = dt_value.replace(tzinfo=timezone.utc)
+    cst_dt = utc_dt.astimezone(CST_TZ)
+    return cst_dt.isoformat()
+
 @router.get("/recent-audit")
 async def get_recent_audit(
     admin_user=Depends(get_current_admin),
@@ -93,7 +110,16 @@ async def get_recent_audit(
             "target_type": log.target_type,
             "target_id": log.target_id,
             "detail": log.detail,
-            "created_at": log.created_at.isoformat() if log.created_at else None,
+            "created_at": _format_cst(log.created_at),
         }
         for log in logs
     ]
+
+
+def _format_cst(dt_value):
+    """Format UTC naive datetime to CST ISO string"""
+    if dt_value is None:
+        return None
+    utc_dt = dt_value.replace(tzinfo=timezone.utc)
+    cst_dt = utc_dt.astimezone(CST_TZ)
+    return cst_dt.isoformat()

backend/python/app/api/chat.py

@@ -4,7 +4,7 @@ from sqlalchemy import and_, desc, asc
 from pydantic import BaseModel, Field
 from typing import Optional
 import uuid
-from datetime import datetime
+from datetime import datetime, timezone, timedelta
 import re
 import random
 import json
@@ -26,6 +26,14 @@ router = APIRouter()
 
 logger = logging.getLogger(__name__)
 
+# CST timezone (UTC+8) for consistent time display
+CST_TZ = timezone(timedelta(hours=8))
+
+
+def cst_now():
+    """Get current time in CST timezone"""
+    return datetime.now(CST_TZ)
+
 
 class CreateConversationRequest(BaseModel):
     title: str = Field(default="新对话")
@@ -99,8 +107,8 @@ def create_conversation(
         status="active",
         pinned=False,
         knowledge_graph_count=0,
-        created_at=datetime.now(),
+        created_at=cst_now(),
-        updated_at=datetime.now(),
+        updated_at=cst_now(),
     )
     db.add(conv)
     db.commit()
@@ -141,7 +149,7 @@ def update_conversation(
         conv.status = req.status
     if req.pinned is not None:
         conv.pinned = req.pinned
-    conv.updated_at = datetime.now()
+    conv.updated_at = cst_now()
 
     db.commit()
     db.refresh(conv)
@@ -166,7 +174,7 @@ def delete_conversation(
 
     # 软删除
     conv.status = "archived"
-    conv.updated_at = datetime.now()
+    conv.updated_at = cst_now()
     db.commit()
 
     return {"code": 0, "message": "删除成功"}
@@ -228,7 +236,7 @@ async def send_message(
         content=req.content,
         token_used=len(req.content) // 2,  # 粗略估算
         model_id=req.model_id or conv.model_id,
-        created_at=datetime.now(),
+        created_at=cst_now(),
     )
     db.add(user_msg)
 
@@ -294,6 +302,22 @@ async def send_message(
                         if kbs:
                             kb_names = ", ".join([k.name for k in kbs])
                             system_parts.append(f"参考知识库: {kb_names}")
+                            # 修复: 实际检索知识库文档内容注入到system prompt
+                            kb_context_parts = []
+                            for kb in kbs:
+                                docs = db.query(KnowledgeDocument).filter(
+                                    KnowledgeDocument.knowledge_base_id == kb.id
+                                ).order_by(KnowledgeDocument.created_at.desc()).limit(5).all()
+                                for doc in docs:
+                                    if doc.content:
+                                        # 截取前500字符避免prompt过长
+                                        kb_context_parts.append(f"[{kb.name}/{doc.name}]: {doc.content[:500]}")
+                            if kb_context_parts:
+                                kb_context = "\n".join(kb_context_parts)
+                                # 限制总长度避免超出模型token上限
+                                if len(kb_context) > 2000:
+                                    kb_context = kb_context[:2000] + "...(内容截断)"
+                                system_parts.append(f"知识库内容参考:\n{kb_context}")
 
                     messages.append({"role": "system", "content": "; ".join(system_parts)})
 
@@ -403,7 +427,7 @@ async def send_message(
         content=ai_content,
         token_used=ai_token_count,
         model_id=req.model_id or conv.model_id,
-        created_at=datetime.now(),
+        created_at=cst_now(),
     )
     db.add(ai_msg)
 
@@ -418,14 +442,14 @@ async def send_message(
             used_skills = [s.skill_name for s in selected_skills]
             ai_msg.used_skills = used_skills
             # 更新每个被使用技能的use_count和last_used_at
-            now = datetime.now()
+            now = cst_now()
             for s in selected_skills:
                 s.use_count = (s.use_count or 0) + 1
                 s.last_used_at = now
 
     # 更新对话统计
     conv.knowledge_graph_count = (conv.knowledge_graph_count or 0) + 1
-    conv.updated_at = datetime.now()
+    conv.updated_at = cst_now()
 
     # 记录Token使用
     token_usage = TokenUsageLog(
@@ -437,7 +461,7 @@ async def send_message(
         prompt_tokens=prompt_tokens or len(req.content) // 2,
         completion_tokens=completion_tokens or ai_token_count,
         total_tokens=total_tokens or (len(req.content) // 2 + ai_token_count),
-        created_at=datetime.now(),
+        created_at=cst_now(),
     )
     db.add(token_usage)
 
@@ -454,7 +478,7 @@ async def send_message(
                 conversation_id=conv_id,
                 status="discovered",
                 token_used=ai_token_count,
-                created_at=datetime.now(),
+                created_at=cst_now(),
             )
             db.add(trajectory)
             db.flush()  # 确保trajectory先写入，再启动pipeline
@@ -511,7 +535,7 @@ def clear_conversation(
     ).delete()
 
     conv.knowledge_graph_count = 0
-    conv.updated_at = datetime.now()
+    conv.updated_at = cst_now()
     db.commit()
 
     return {"code": 0, "message": "对话上下文已清空"}
@@ -550,8 +574,8 @@ def convert_to_knowledge_graph(
         description=f"从对话「{conv.title}」自动生成的知识图谱",
         directory_path="/",
         document_count=0,
-        created_at=datetime.now(),
+        created_at=cst_now(),
-        updated_at=datetime.now(),
+        updated_at=cst_now(),
     )
     db.add(kb)
     db.flush()
@@ -572,8 +596,8 @@ def convert_to_knowledge_graph(
             file_size=len(msg.content.encode('utf-8')),
             status="completed",
             chunk_count=max(1, len(msg.content) // 500 + 1),
-            created_at=datetime.now(),
+            created_at=cst_now(),
-            updated_at=datetime.now(),
+            updated_at=cst_now(),
         )
         db.add(doc)
         doc_count += 1
@@ -660,11 +684,11 @@ def convert_to_knowledge_graph(
 
     # 更新知识库的知识图谱计数
     kb.knowledge_graph_count = len(graph_nodes)
-    kb.updated_at = datetime.now()
+    kb.updated_at = cst_now()
 
     # 更新对话的知识图谱计数
     conv.knowledge_graph_count = (conv.knowledge_graph_count or 0) + 1
-    conv.updated_at = datetime.now()
+    conv.updated_at = cst_now()
 
     db.commit()
 
@@ -776,6 +800,6 @@ def _execute_skill_tool(db: Session, func_name: str, args: dict, skills_list: li
     # 更新skill使用计数
     if matched_skill:
         matched_skill.use_count = (matched_skill.use_count or 0) + 1
-        matched_skill.last_used_at = datetime.now()
+        matched_skill.last_used_at = cst_now()
 
     return result

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")
@@ -368,13 +370,12 @@ 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
+    # 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
+        # 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()
@@ -384,6 +385,11 @@ def uninstall_app(
         # 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
+
     app.updated_at = datetime.now()
 
     db.commit()

backend/python/app/api/token_usage.py

@@ -4,7 +4,7 @@ from sqlalchemy import and_, desc, asc, func, extract
 from pydantic import BaseModel, Field
 from typing import Optional
 import uuid
-from datetime import datetime, date, timedelta
+from datetime import datetime, date, timedelta, timezone
 
 from ..database import get_db
 from ..models import (
@@ -16,6 +16,9 @@ from ..middleware.log_service import LogService
 
 router = APIRouter()
 
+# CST timezone (UTC+8)
+CST_TZ = timezone(timedelta(hours=8))
+
 
 class RechargeRequest(BaseModel):
     amount: int = Field(ge=1)
@@ -32,12 +35,15 @@ def get_overview(
         TokenUsageLog.user_id == current_user.id
     ).scalar()
 
-    # 今日使用中应用数
+    # 今日使用中应用数 - 使用CST时区的"今天"
-    today_start = datetime.combine(date.today(), datetime.min.time())
+    now_cst = datetime.now(CST_TZ)
+    today_start = now_cst.replace(hour=0, minute=0, second=0, microsecond=0)
+    # Convert to UTC for DB comparison since container uses UTC timestamps
+    today_start_utc = today_start.astimezone(timezone.utc).replace(tzinfo=None)
     today_apps = db.query(func.count(func.distinct(TokenUsageLog.model_id))).filter(
         and_(
             TokenUsageLog.user_id == current_user.id,
-            TokenUsageLog.created_at >= today_start,
+            TokenUsageLog.created_at >= today_start_utc,
         )
     ).scalar() or 0
 
@@ -46,9 +52,7 @@ def get_overview(
         TokenBalance.user_id == current_user.id
     ).first()
 
-    from datetime import timezone, timedelta
+    server_time = datetime.now(CST_TZ).isoformat()
-    shanghai_tz = timezone(timedelta(hours=8))
-    server_time = datetime.now(shanghai_tz).isoformat()
 
     return {
         "code": 0,
@@ -169,7 +173,7 @@ def get_token_logs(
             "completion_tokens": log_item.completion_tokens or 0,
             "total_tokens": log_item.total_tokens or 0,
             "conversation_id": log_item.conversation_id,
-            "created_at": log_item.created_at.isoformat() if log_item.created_at else None,
+            "created_at": _format_cst_time(log_item.created_at),
         })
 
     return {
@@ -245,3 +249,13 @@ def recharge(
         },
         "message": "充值成功",
     }
+
+
+def _format_cst_time(dt_value):
+    """Format datetime to CST ISO string. Input is UTC naive datetime from DB."""
+    if dt_value is None:
+        return None
+    # DB stores UTC naive datetime, convert to CST
+    utc_dt = dt_value.replace(tzinfo=timezone.utc)
+    cst_dt = utc_dt.astimezone(CST_TZ)
+    return cst_dt.isoformat()

frontend/src/api/index.ts

@@ -105,7 +105,7 @@ export const chatAPI = {
     del<any>(`/chat/conversations/${id}`),
   getMessages: (convId: string) =>
     get<any[]>(`/chat/conversations/${convId}/messages`),
-  sendMessage: (convId: string, data: { content: string; model_id?: string; agent_ids?: string[]; skill_ids?: string[]; knowledge_ids?: string[]; use_tools?: boolean }) =>
+  sendMessage: (convId: string, data: { content: string; model_id?: string; agent_ids?: string[]; skill_ids?: string[]; knowledge_base_ids?: string[]; use_tools?: boolean }) =>
     post<any>(`/chat/conversations/${convId}/messages`, data),
   clearContext: (convId: string) =>
     post<any>(`/chat/conversations/${convId}/clear`),

frontend/src/pages/front/ChatPage.tsx

@@ -582,7 +582,7 @@ const ChatPage: React.FC = () => {
         model_id: selectedModelId || undefined,
         agent_ids: selectedAgentIds.length > 0 ? selectedAgentIds : undefined,
         skill_ids: selectedSkillIds.length > 0 ? selectedSkillIds : undefined,
-        knowledge_ids: selectedKbIds.length > 0 ? selectedKbIds : undefined,
+        knowledge_base_ids: selectedKbIds.length > 0 ? selectedKbIds : undefined,
         use_tools: selectedSkillIds.length > 0 || selectedAgentIds.length > 0,
       });