Add auto-summary settings

internal/app/sidebar.go

@@ -331,6 +331,16 @@ func (st *uiState) drawSidebar() {
 		write(prefix + openStyle + nameCell + styleReset + suffix)
 	}
 
+	if summary := st.activeSummaryText(width - 4); summary != "" && row+2 <= maxRow {
+		write("")
+		for _, line := range wrapSidebarSummary(summary, width-4) {
+			if row > maxRow {
+				break
+			}
+			write("   " + styleDim + line + styleReset)
+		}
+	}
+
 	// Scratchpads list — names only. The preview pane used to live
 	// here and clobbered the main viewport when content overflowed the
 	// rail. Focus moves to a pad via Ctrl+W/S; the content renders in
@@ -390,3 +400,42 @@ func (st *uiState) drawSidebar() {
 	fmt.Fprintf(os.Stdout, "\x1b7%s\x1b8", frame)
 	st.outMu.Unlock()
 }
+
+func wrapSidebarSummary(s string, width int) []string {
+	if width < 1 {
+		width = 1
+	}
+	words := strings.Fields(s)
+	if len(words) == 0 {
+		return nil
+	}
+	var out []string
+	var cur string
+	for _, word := range words {
+		if visibleLen(word) > width {
+			if cur != "" {
+				out = append(out, cur)
+				cur = ""
+			}
+			out = append(out, clipRunes(word, width-1)+"…")
+			continue
+		}
+		if cur == "" {
+			cur = word
+			continue
+		}
+		if visibleLen(cur)+1+visibleLen(word) <= width {
+			cur += " " + word
+			continue
+		}
+		out = append(out, cur)
+		cur = word
+	}
+	if cur != "" {
+		out = append(out, cur)
+	}
+	if len(out) > 3 {
+		out = out[:3]
+	}
+	return out
+}