docs: expand .env example to show max/large values; add SUMM_TIMEOUT and summarizer tunables\n\nfeat: summarizer improvements\n- readability extraction for articles\n- image links passed to model as vision inputs\n- configurable max groups/links/bytes and timeout\n- higher default ceilings; resilient fallback summary

internal/httpapi/server.go

@@ -32,6 +32,8 @@ type Server struct {
 	Logger  *slog.Logger
 	Metrics *Metrics
 	Ready   func() bool
+	// Optional timeout override for summarizer
+	SummarizerTimeout time.Duration
 }
 
 func (s *Server) Start(ctx context.Context) error {
@@ -106,8 +108,12 @@ func (s *Server) handleTrigger(w http.ResponseWriter, r *http.Request) {
 		_, _ = w.Write([]byte("summarizer not configured"))
 		return
 	}
-	// Timeout summarization to avoid hung requests.
-	ctxSum, cancel := context.WithTimeout(ctx, 60*time.Second)
+	// Timeout summarization using configurable timeout (default 5m)
+	tout := s.SummarizerTimeout
+	if tout <= 0 {
+		tout = 5 * time.Minute
+	}
+	ctxSum, cancel := context.WithTimeout(ctx, tout)
 	defer cancel()
 	summary, err := s.Summarizer.Summarize(ctxSum, channel, msgs, window)
 	if err != nil {