Local mode, Makefile, image fixes, Pete avatar

- Add -local flag: web/RSS-only mode that skips Matrix login and posting,
  so the web UI can be exercised against live feeds without credentials
- Add Makefile (build/local/seed/test/clean) that handles Tailwind +
  go build in one shot
- Fix Guardian thumbnails: NormalizeImageURL was rewriting width=1200
  onto signed i.guim.co.uk URLs, invalidating the s= signature and
  returning 401. Leave signed URLs alone and pick the widest
  media:content variant up front instead
- Use pete.avif as the header logo, favicon, and footer mark; drop the
  unused leaf.svg

main.go

@@ -26,6 +26,7 @@ func main() {
 	seed := flag.Bool("seed", false, "ingest current feed items as seen without posting, then exit")
 	test := flag.Bool("test", false, "post one story to verify the full pipeline, then exit")
 	testSource := flag.String("test-source", "", "source name to use for -test (default: first enabled)")
+	local := flag.Bool("local", false, "web/RSS-only mode: poll feeds and serve the web UI, no Matrix login or posting")
 	flag.Parse()
 
 	slog.SetDefault(slog.New(slog.NewTextHandler(os.Stderr, &slog.HandlerOptions{
@@ -62,6 +63,12 @@ func main() {
 		return
 	}
 
+	// Local mode: poll feeds + serve web UI only. No Matrix, no posting queue.
+	if *local {
+		runLocal(cfg)
+		return
+	}
+
 	// Create Matrix client
 	mx, err := matrix.New(cfg.Matrix)
 	if err != nil {
@@ -209,6 +216,47 @@ func main() {
 	slog.Info("pete stopped")
 }
 
+func runLocal(cfg *config.Config) {
+	cfg.Web.Enabled = true
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	sigCh := make(chan os.Signal, 1)
+	signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)
+
+	processItem := func(_ context.Context, item *ingestion.FeedItem) {
+		if item.DirectRoute == "" {
+			slog.Info("local: item has no direct_route, discarding", "guid", item.GUID, "source", item.Source)
+			storage.MarkClassified(item.GUID, "_discarded", "[]")
+			return
+		}
+		storage.MarkClassified(item.GUID, item.DirectRoute, "[]")
+		slog.Info("local: story classified",
+			"guid", item.GUID, "source", item.Source, "channel", item.DirectRoute, "headline", item.Headline)
+	}
+
+	poller := ingestion.NewPoller(cfg.Sources, processItem)
+	poller.Start(ctx)
+	slog.Info("local: pollers started")
+
+	ws, err := web.New(cfg.Web)
+	if err != nil {
+		slog.Error("local: web server init failed", "err", err)
+		os.Exit(1)
+	}
+	go ws.Start(ctx)
+	slog.Info("local: web UI listening", "addr", cfg.Web.ListenAddr)
+
+	storage.RunMaintenance()
+
+	sig := <-sigCh
+	slog.Info("local: shutdown signal received", "signal", sig)
+	cancel()
+	poller.Wait()
+	slog.Info("pete stopped")
+}
+
 func runSeed(cfg *config.Config) {
 	total := 0
 	for _, src := range cfg.Sources {