feat: company names in screener + universe enrichment

- migration 0010: universe.company_name column
- SaveUniverse persists company names; new CompanyNames() store lookup
- scheduler universe sweep + universe-sweep cmd fetch names via one Screen() call (best effort)
- /api/screen now returns real company names (live when keyed, stored as fallback)
- Screener card shows 'PT Bank ...' name under the ticker symbol for search results

backend/internal/scheduler/scheduler.go

@@ -6,6 +6,7 @@
 package scheduler
 
 import (
+	"strings"
 	"context"
 	"encoding/json"
 	"fmt"
@@ -283,10 +284,21 @@ func (s *Scheduler) universe(ctx context.Context) error {
 	raw, _ := json.Marshal(all)
 	_ = s.DB.SaveSnapshot("IDX", date, "close", string(raw))
 	// Persist the universe ticker list so AllTickers() can return the full
-	// IDX set instead of only tickers that have depth data yet.
+	// IDX set instead of only tickers that have depth data yet. Company names
+	// ride along (one extra screener call — best effort, skipped on failure)
+	// so the screener search can show "PT Bank Central Asia Tbk" not "BBCA".
+	names := map[string]string{}
+	if rows, err := s.Sectors.Screen(ctx, "", "", 1000, 0); err == nil {
+		for _, row := range rows {
+			if row.CompanyName != "" {
+				names[strings.ToUpper(strings.TrimSuffix(row.Symbol, ".JK"))] = row.CompanyName
+			}
+		}
+	}
 	uni := make([]store.UniverseRow, 0, len(all))
 	for _, r := range all {
-		uni = append(uni, store.UniverseRow{Symbol: r.Symbol, Close: r.Close, Date: r.Date})
+		tk := strings.ToUpper(strings.TrimSuffix(r.Symbol, ".JK"))
+		uni = append(uni, store.UniverseRow{Symbol: tk, Close: r.Close, Date: r.Date, CompanyName: names[tk]})
 	}
 	if err := s.DB.SaveUniverse(uni); err != nil {
 		log.Printf("scheduler: universe save: %v", err)