feat: update strategy filter and agent logos config

- Set default strategy to Aggressive Long Only in LeadboardView
- Add TradeAgent logo configuration in LiveView and CompareChartE
- Fix TradeAgent logo path from trade.png to tradeagent.png

src/components/CompareChartE.vue

@@ -93,7 +93,7 @@ function toPct(points){
 const AGENT_LOGOS = {
   'HedgeFundAgent': new URL('../assets/images/agents_images/hedgefund.png', import.meta.url).href,
   'DeepFundAgent': new URL('../assets/images/agents_images/deepfund.png', import.meta.url).href,
-  'TradeAgent': new URL('../assets/images/agents_images/trade.png', import.meta.url).href,
+  'TradeAgent': new URL('../assets/images/agents_images/tradeagent.png', import.meta.url).href,
   'InvestorAgent': new URL('../assets/images/agents_images/investor.png', import.meta.url).href,
   'BTC': new URL('../assets/images/assets_images/BTC.png', import.meta.url).href,
   'ETH': new URL('../assets/images/assets_images/ETH.png', import.meta.url).href,

src/views/LeadboardView.vue

@@ -195,7 +195,7 @@ export default {
         this.filters.models = state.modelOptions.map(o => o.value)
       }
       if (!this.filters.strategies.length && state.strategyOptions.length) {
-        this.filters.strategies = state.strategyOptions.map(o => o.value)
+        this.filters.strategies = ['long_only']  // 默认只显示 Aggressive Long Only
       }
     },
     onUpdatedClick(){

src/views/LiveView.vue

@@ -114,7 +114,12 @@ const ASSET_ICONS = {
   BMRN: new URL('../assets/images/assets_images/BMRN.png', import.meta.url).href,
   TSLA: new URL('../assets/images/assets_images/TSLA.png', import.meta.url).href,
 }
-const AGENT_LOGOS = {}
+const AGENT_LOGOS = {
+  'TradeAgent': new URL('../assets/images/agents_images/tradeagent.png', import.meta.url).href,
+  'HedgeFundAgent': new URL('../assets/images/agents_images/hedgefund.png', import.meta.url).href,
+  'DeepFundAgent': new URL('../assets/images/agents_images/deepfund.png', import.meta.url).href,
+  'InvestorAgent': new URL('../assets/images/agents_images/investor.png', import.meta.url).href,
+}
 const ASSET_CUTOFF = { BTC: '2025-08-01' }
 
 /* ---------- state ---------- */