移除 CityContractDetail 组件：城市详情面板不再内嵌合约查询

删除 105 行组件定义+按需拉取 Polymarket 市场数据逻辑。selectedCity 状态保留给 CityRegionList 使用。

frontend/components/dashboard/ScanTerminalDashboard.tsx

@@ -225,112 +225,6 @@ function CityRegionList({
   );
 }
 
-function CityContractDetail({
-  isEn,
-  rows,
-  selectedCity,
-  selectedId,
-  onSelect,
-}: {
-  isEn: boolean;
-  rows: ScanOpportunityRow[];
-  selectedCity: string | null;
-  selectedId?: string | null;
-  onSelect: (row: ScanOpportunityRow) => void;
-}) {
-  const cityRows = useMemo(
-    () => (selectedCity ? rows.filter((r) => String(r.city || "").toLowerCase() === selectedCity) : []),
-    [rows, selectedCity],
-  );
-  const [marketRows, setMarketRows] = useState<ScanOpportunityRow[] | null>(null);
-
-  useEffect(() => {
-    setMarketRows(null);
-    if (!selectedCity) return;
-    let cancelled = false;
-    const baseRow = cityRows[0];
-    const cityName = cityRows[0]?.city_display_name || selectedCity;
-    fetch(`/api/city/${encodeURIComponent(cityName)}/market-scan?lite=true`, {
-      cache: "no-store",
-      headers: { Accept: "application/json" },
-    })
-      .then(async (res) => { if (!res.ok) return null; return res.json(); })
-      .then((json: any) => {
-        if (cancelled || !baseRow) return;
-        const scan = json?.market_scan;
-        if (!scan || scan.available === false) return;
-        const scanRows = Array.isArray(scan.scan_rows) ? scan.scan_rows : [];
-        if (scanRows.length) {
-          setMarketRows(scanRows.map((row: Partial<ScanOpportunityRow>) => ({
-            ...baseRow,
-            ...row,
-            city: baseRow.city,
-            city_display_name: baseRow.city_display_name,
-            local_date: baseRow.local_date,
-            local_time: baseRow.local_time,
-            temp_symbol: baseRow.temp_symbol,
-            current_temp: baseRow.current_temp,
-            current_max_so_far: baseRow.current_max_so_far,
-            deb_prediction: baseRow.deb_prediction,
-            trading_region: baseRow.trading_region,
-            trading_region_label: baseRow.trading_region_label,
-            trading_region_label_zh: baseRow.trading_region_label_zh,
-            trading_region_sort: baseRow.trading_region_sort,
-            tz_offset_seconds: baseRow.tz_offset_seconds,
-          } as ScanOpportunityRow)));
-          return;
-        }
-        if (!scan.selected_slug) return;
-        const midpoint = scan.midpoint ?? scan.yes_midpoint ?? scan.market_price ?? null;
-        setMarketRows([{
-          ...baseRow,
-          id: `${baseRow.city}|${scan.selected_date || baseRow.local_date || "today"}|${scan.selected_slug}|yes`,
-          market_slug: scan.selected_slug,
-          market_question: scan.primary_market?.question || scan.question || scan.selected_slug,
-          market_url: scan.market_url || scan.primary_market_url || (
-            scan.selected_slug ? `https://polymarket.com/event/${scan.selected_slug}` : null
-          ),
-          selected_date: scan.selected_date || baseRow.local_date,
-          target_label: scan.target_label || scan.temperature_bucket?.label || scan.selected_slug,
-          model_probability: scan.model_probability ?? baseRow.model_probability,
-          market_probability: scan.market_price ?? scan.yes_midpoint ?? null,
-          midpoint,
-          ask: scan.yes_buy ?? scan.yes_ask ?? null,
-          bid: scan.yes_sell ?? scan.yes_bid ?? null,
-          spread: scan.yes_spread ?? scan.spread ?? null,
-          book_liquidity: scan.liquidity ?? scan.book_liquidity ?? null,
-          market_liquidity: scan.liquidity ?? scan.market_liquidity ?? null,
-          volume: scan.volume ?? baseRow.volume,
-          quote_source: scan.quote_source ?? baseRow.quote_source,
-          active: scan.primary_market?.active ?? baseRow.active,
-          closed: scan.primary_market?.closed ?? baseRow.closed,
-          accepting_orders: scan.primary_market?.acceptingOrders ?? baseRow.accepting_orders,
-          tradable: scan.primary_market?.active === true && scan.primary_market?.closed !== true,
-        }]);
-      })
-      .catch(() => {});
-    return () => { cancelled = true; };
-  }, [selectedCity, cityRows]);
-
-  const displayRows = marketRows?.length ? marketRows : cityRows;
-
-  return (
-    <Panel title={isEn ? "Contracts" : "合约"} className="flex-1 min-h-0">
-      {!selectedCity ? (
-        <div className="flex items-center justify-center p-6 text-[12px] text-slate-400">
-          {isEn ? "Select a city above" : "在上方选择城市"}
-        </div>
-      ) : !cityRows.length ? (
-        <div className="flex items-center justify-center p-6 text-[12px] text-slate-400">
-          {isEn ? "No contracts for this city" : "该城市暂无合约"}
-        </div>
-      ) : (
-        <KoyfinRowsTable compact isEn={isEn} onSelect={onSelect} rows={displayRows} selectedId={selectedId} />
-      )}
-    </Panel>
-  );
-}
-
 function PolyWeatherTerminal({
   generatedText,
   isEn,
@@ -739,13 +633,6 @@ function PolyWeatherTerminal({
                     selectedCity={selectedCity}
                     onSelectCity={setSelectedCity}
                   />
-                  <CityContractDetail
-                    isEn={isEn}
-                    rows={filteredRegionRows}
-                    selectedCity={selectedCity}
-                    selectedId={selectedRow?.id}
-                    onSelect={setSelectedRow}
-                  />
                 </div>
 
                 <div className="min-h-0">