feat: add Citations and WatchlistChat components, integrate with API

- Implemented Citations component to display citation data.
- Created WatchlistDrawer and ChatSidebar components for managing watchlists and AI chat functionality.
- Integrated API calls for watchlist management and chat interactions.
- Updated index.tsx to include new components in the main application layout.
- Added API client in lib/api.ts for structured API interactions.
- Developed Alerts, Dashboard, Portfolio, Routines, Screener, and Report pages with relevant data fetching and UI components.
- Introduced styles in tokens.css for consistent theming across the application.
- Configured TypeScript and Vite for project setup and development.

backend/internal/store/accuracy.go

@@ -0,0 +1,89 @@
+package store
+
+import (
+	"sort"
+)
+
+// ResolveDue resolves predictions older than 30d against actual return:
+// first stored close on/after predict_date vs latest stored close.
+// BUY hits above +5%, AVOID hits below -5%, HOLD hits within ±10%.
+// Returns the number of newly resolved rows.
+func (db *DB) ResolveDue() (int, error) {
+	due, err := db.DueForResolution()
+	if err != nil {
+		return 0, err
+	}
+	resolved := 0
+	for _, p := range due {
+		id, _ := p["id"].(int64)
+		ticker, _ := p["ticker"].(string)
+		pred, _ := p["prediction"].(string)
+		since, _ := p["predict_date"].(string)
+		series, err := db.dailyCloses(ticker)
+		if err != nil || len(series) < 2 {
+			continue
+		}
+		base, ok := firstOnOrAfter(series, since)
+		if !ok {
+			continue
+		}
+		last := series[len(series)-1]
+		if base.close <= 0 {
+			continue
+		}
+		ret := (last.close - base.close) / base.close
+		hit := false
+		switch pred {
+		case "BUY":
+			hit = ret > 0.05
+		case "AVOID":
+			hit = ret < -0.05
+		default: // HOLD
+			hit = ret >= -0.10 && ret <= 0.10
+		}
+		if err := db.ResolvePrediction(id, hit, ret); err == nil {
+			resolved++
+		}
+	}
+	return resolved, nil
+}
+
+type closePoint struct {
+	date  string
+	close float64
+}
+
+// dailyCloses parses every stored daily payload into a date-sorted series.
+func (db *DB) dailyCloses(ticker string) ([]closePoint, error) {
+	rows, err := db.Query(`SELECT payload_json FROM snapshots WHERE ticker=? AND source='daily'`, ticker)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+	var out []closePoint
+	for rows.Next() {
+		var raw string
+		if err := rows.Scan(&raw); err != nil {
+			return nil, err
+		}
+		for _, b := range parseDailyBars(raw, "") {
+			if b.Date != "" && b.Close > 0 {
+				out = append(out, closePoint{b.Date, b.Close})
+			}
+		}
+	}
+	if err := rows.Err(); err != nil {
+		return nil, err
+	}
+	sort.Slice(out, func(i, j int) bool { return out[i].date < out[j].date })
+	return out, nil
+}
+
+func firstOnOrAfter(series []closePoint, date string) (closePoint, bool) {
+	for _, p := range series {
+		if p.date >= date {
+			return p, true
+		}
+	}
+	return closePoint{}, false
+}