feat: implement comprehensive Polymarket weather analysis service with frontend dashboard and market scanning capabilities

frontend/lib/types.ts

@@ -283,18 +283,28 @@ export interface MarketScan {
   temperature_bucket: any | null;
   model_probability: number | null;
   market_price: number | null;
+  midpoint?: number | null;
+  spread?: number | null;
   edge_percent: number | null;
   signal_label: "BUY YES" | "BUY NO" | "MONITOR";
   confidence: "low" | "medium" | "high";
+  probability_engine?: string | null;
+  probability_calibration_mode?: string | null;
   yes_token: MarketToken | null;
   no_token: MarketToken | null;
   yes_buy: number | null;
   yes_sell: number | null;
+  yes_midpoint?: number | null;
+  yes_spread?: number | null;
   no_buy: number | null;
   no_sell: number | null;
+  no_midpoint?: number | null;
+  no_spread?: number | null;
   last_trade_price: number | null;
   liquidity: number | null;
   volume: number | null;
+  quote_source?: string | null;
+  quote_age_ms?: number | null;
   sparkline: number[];
   top_buckets?: Array<{
     label?: string | null;
@@ -311,6 +321,7 @@ export interface MarketScan {
     is_primary?: boolean;
   }>;
   recent_trades: Trade[];
+  scan_scope?: "lite" | "full" | string | null;
   websocket: any;
 }