feat: 股票详情页增加最新交易日PE/PB/ROE/换手率/市值等行情指标

- 后端tencent.py增加换手率/市盈率/市净率/总市值/流通市值字段提取
- 前端StockQuote接口新增对应字段类型定义
- 股票详情页增加"行情指标"卡片，展示PE/PB/ROE/换手率/总手/成交额/市值
- ROE取自财务分析数据的加权净资产收益率

Co-Authored-By: Claude <noreply@anthropic.com>

backend/services/tencent.py

@@ -142,10 +142,11 @@ async def fetch_quote(code: str) -> Optional[dict]:
                 return None
             text = resp.content.decode("gbk", errors="replace")
             parts = parse_tencent_data(text)
-            if not parts or len(parts) < 38:
+            if not parts or len(parts) < 46:
                 return None
-            # 字段索引(1-based)：1=名称, 3=当前价, 4=昨收, 5=今开, 6=成交量(手)
+            # 字段索引：1=名称, 3=当前价, 4=昨收, 5=今开, 6=成交量(手)
             # 7=外盘, 8=内盘, 31=涨跌额, 32=涨跌幅%, 33=最高, 34=最低, 37=成交额(万)
+            # 38=换手率%, 39=市盈率, 43=总市值, 44=流通市值, 45=市净率
             name = parts[1] or ""
             current_price = float(parts[3]) if parts[3] else 0
             yesterday_close = float(parts[4]) if parts[4] else 0
@@ -158,6 +159,11 @@ async def fetch_quote(code: str) -> Optional[dict]:
             change_pct = float(parts[32]) if parts[32] else 0
             outer_disk = float(parts[7]) if parts[7] else 0
             inner_disk = float(parts[8]) if parts[8] else 0
+            turnover_rate = float(parts[38]) if parts[38] else 0  # 换手率%
+            pe = float(parts[39]) if parts[39] else 0  # 市盈率
+            total_market_cap = float(parts[43]) if parts[43] else 0  # 总市值
+            circulating_market_cap = float(parts[44]) if parts[44] else 0  # 流通市值
+            pb = float(parts[45]) if parts[45] else 0  # 市净率
 
             if not name or current_price == 0:
                 return None
@@ -186,6 +192,11 @@ async def fetch_quote(code: str) -> Optional[dict]:
                 "time": now.strftime("%H:%M:%S"),
                 "change": round(change, 2),
                 "changePercent": round(change_percent, 2),
+                "turnoverRate": round(turnover_rate, 2),
+                "pe": round(pe, 2) if pe else 0,
+                "pb": round(pb, 2) if pb else 0,
+                "totalMarketCap": round(total_market_cap, 2),
+                "circulatingMarketCap": round(circulating_market_cap, 2),
             }
         except Exception:
             return None