feat: redesign backtest module UI and fix 404 issue

- Fix backtest API 404 by registering routes in setupRoutes()
- Redesign BacktestPage with 3-step wizard configuration
- Add progress ring visualization with animation
- Add equity chart with trade markers using Recharts
- Add trade timeline with card-style display
- Add stats cards for equity, return, drawdown, sharpe
- Add tab navigation for overview/chart/trades/decisions
- Improve run history list with status icons
- Add lightweight-charts dependency (for future use)

api/server.go

@@ -187,6 +187,10 @@ func (s *Server) setupRoutes() {
 			protected.GET("/decisions", s.handleDecisions)
 			protected.GET("/decisions/latest", s.handleLatestDecisions)
 			protected.GET("/statistics", s.handleStatistics)
+
+			// Backtest routes
+			backtest := protected.Group("/backtest")
+			s.registerBacktestRoutes(backtest)
 		}
 	}
 }

web/package-lock.json

@@ -15,6 +15,7 @@
         "clsx": "^2.1.1",
         "date-fns": "^4.1.0",
         "framer-motion": "^12.23.24",
+        "lightweight-charts": "^5.0.9",
         "lucide-react": "^0.552.0",
         "react": "^18.3.1",
         "react-dom": "^18.3.1",
@@ -4483,6 +4484,12 @@
         "node": ">=12.0.0"
       }
     },
+    "node_modules/fancy-canvas": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/fancy-canvas/-/fancy-canvas-2.1.0.tgz",
+      "integrity": "sha512-nifxXJ95JNLFR2NgRV4/MxVP45G9909wJTEKz5fg/TZS20JJZA6hfgRVh/bC9bwl2zBtBNcYPjiBE4njQHVBwQ==",
+      "license": "MIT"
+    },
     "node_modules/fast-deep-equal": {
       "version": "3.1.3",
       "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz",
@@ -5797,6 +5804,15 @@
         "node": ">= 0.8.0"
       }
     },
+    "node_modules/lightweight-charts": {
+      "version": "5.0.9",
+      "resolved": "https://registry.npmjs.org/lightweight-charts/-/lightweight-charts-5.0.9.tgz",
+      "integrity": "sha512-8oQIis8jfZVfSwz8j9Z5x3O79dIRTkEYI9UY7DKtE4O3ZxlHjMK3L0+4nOVOOFq4FHI/oSIzz1RHeNImCk6/Jg==",
+      "license": "Apache-2.0",
+      "dependencies": {
+        "fancy-canvas": "2.1.0"
+      }
+    },
     "node_modules/lilconfig": {
       "version": "3.1.3",
       "resolved": "https://registry.npmjs.org/lilconfig/-/lilconfig-3.1.3.tgz",

web/package.json

@@ -21,6 +21,7 @@
     "clsx": "^2.1.1",
     "date-fns": "^4.1.0",
     "framer-motion": "^12.23.24",
+    "lightweight-charts": "^5.0.9",
     "lucide-react": "^0.552.0",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",