Add execution plan for sell decisions: amount, risk management, take-profit; include execution step in TradingGraph workflow

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

app/types/agents.ts

@@ -20,6 +20,16 @@ export interface DebateRound {
   researcher: 'bullish' | 'bearish'
 }
 
+export interface ExecutionPlan {
+  amount: number // number of shares to trade
+  riskManagement: {
+    maxLossPercent?: number
+    method?: string
+  }
+  takeProfit?: number // target price for take-profit
+  note?: string
+}
+
 export interface TradingDecision {
   action: 'buy' | 'sell' | 'hold'
   confidence: number
@@ -28,6 +38,7 @@ export interface TradingDecision {
   reasoning: string
   agentSignals: AgentSignal[]
   debateRounds: DebateRound[]
+  executionPlan?: ExecutionPlan
 }
 
 export interface AgentConfig {