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/cmd/server/main.go

@@ -0,0 +1,83 @@
+// FlowSight server: HTTP API + ingestion scheduler in one process.
+// Offline without SECTORS_API_KEY (serves seed data); live with it.
+package main
+
+import (
+	"context"
+	"log"
+	"net/http"
+	"os"
+	"os/signal"
+	"path/filepath"
+	"syscall"
+	"time"
+
+	"flowsight/internal/api"
+	"flowsight/internal/config"
+	"flowsight/internal/sectors"
+	"flowsight/internal/store"
+)
+
+func main() {
+	cfg := config.Load()
+	if err := os.MkdirAll(filepath.Dir(cfg.DBPath), 0o755); err != nil {
+		log.Fatalf("server: mkdir data: %v", err)
+	}
+	db, err := store.Open(cfg.DBPath)
+	if err != nil {
+		log.Fatalf("server: open db: %v", err)
+	}
+	defer db.Close()
+	cache := store.NewCache(cfg.RedisURL)
+	sectorsClient := sectors.New(cfg.SectorsBaseURL, cfg.SectorsAPIKey)
+
+	// Historical-replay seed keeps every screen alive with no key.
+	if db.NeedsSeed() {
+		seeded := false
+		for _, dir := range []string{"tests/fixtures", "../tests/fixtures", "backend/tests/fixtures"} {
+			st, err := db.SeedFromDir(dir, cfg.DemoUserKey)
+			if err == nil {
+				log.Printf("server: seeded %d snapshots from %s", st.Snapshots, dir)
+				seeded = true
+				break
+			}
+		}
+		if !seeded {
+			if ex, err := os.Executable(); err == nil {
+				dir := filepath.Join(filepath.Dir(ex), "fixtures")
+				if st, err := db.SeedFromDir(dir, cfg.DemoUserKey); err == nil {
+					log.Printf("server: seeded %d snapshots from %s", st.Snapshots, dir)
+				} else {
+					log.Printf("server: no seed bundle found (tried tests/fixtures, binary dir): %v", err)
+				}
+			}
+		}
+	}
+	// Ensure the demo watchlist exists even without a seed bundle.
+	if wl, _ := db.Watchlist(cfg.DemoUserKey); len(wl) == 0 {
+		for _, t := range cfg.Watchlist {
+			_ = db.AddWatch(cfg.DemoUserKey, t)
+		}
+	}
+
+	srv := api.New(cfg, db, cache, sectorsClient)
+	srv.Sched.Start()
+	defer srv.Sched.Stop()
+
+	httpSrv := &http.Server{Addr: ":" + cfg.Port, Handler: srv.Router()}
+	go func() {
+		log.Printf("server: listening :%s (sectors key: %v, redis: %v)",
+			cfg.Port, cfg.HasSectorsKey(), cache.HasRedis())
+		if err := httpSrv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+			log.Fatalf("server: listen: %v", err)
+		}
+	}()
+
+	quit := make(chan os.Signal, 1)
+	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
+	<-quit
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+	_ = httpSrv.Shutdown(ctx)
+	log.Print("server: stopped")
+}