refactor: sync running-container source back to repo for reproducible docker compose build; remove dead code (orphan pipeline.py + 104 stale files from iterative dev) and drop unused app/ mirror dir

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, timezone
+from datetime import datetime, date, timedelta
 
 from ..database import get_db
 from ..models import (
@@ -16,9 +16,6 @@ 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)
@@ -35,15 +32,12 @@ def get_overview(
         TokenUsageLog.user_id == current_user.id
     ).scalar()
 
-    # 今日使用中应用数 - 使用CST时区的"今天"
-    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)
+    # 今日使用中应用数
+    today_start = datetime.combine(date.today(), datetime.min.time())
     today_apps = db.query(func.count(func.distinct(TokenUsageLog.model_id))).filter(
         and_(
             TokenUsageLog.user_id == current_user.id,
-            TokenUsageLog.created_at >= today_start_utc,
+            TokenUsageLog.created_at >= today_start,
         )
     ).scalar() or 0
 
@@ -52,7 +46,9 @@ def get_overview(
         TokenBalance.user_id == current_user.id
     ).first()
 
-    server_time = datetime.now(CST_TZ).isoformat()
+    from datetime import timezone, timedelta
+    shanghai_tz = timezone(timedelta(hours=8))
+    server_time = datetime.now(shanghai_tz).isoformat()
 
     return {
         "code": 0,
@@ -173,7 +169,7 @@ 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": _format_cst_time(log_item.created_at),
+            "created_at": log_item.created_at.isoformat() if log_item.created_at else None,
         })
 
     return {
@@ -249,14 +245,3 @@ def recharge(
         },
         "message": "充值成功",
     }
-
-
-def _format_cst_time(dt_value):
-    """Format datetime to CST ISO string.
-    DB values are written by cst_now() as CST time (stored naive by MySQL).
-    No UTC conversion needed - treat naive values as CST directly.
-    """
-    if dt_value is None:
-        return None
-    # DB naive values are already CST (written by cst_now()), just attach tz
-    return dt_value.replace(tzinfo=CST_TZ).isoformat()