Add task sidebar workflow

internal/app/sidebar.go

@@ -168,6 +168,7 @@ func (st *uiState) drawSidebar() {
 	palOpen := st.palette != nil
 	focus := st.focusedID
 	focusPad := st.focusedPad
+	focusTask := st.focusedTaskID
 	activeAgent := st.activeAgentID
 	st.mu.Unlock()
 	if palOpen {
@@ -262,6 +263,42 @@ func (st *uiState) drawSidebar() {
 		}
 	}
 
+	// Tasks section — manual project-local tasks. Task selection is a real
+	// focus target, but it does not implicitly scope generic spawns.
+	writeHeader("Tasks")
+	tasks := st.tasksList()
+	if len(tasks) == 0 {
+		write("   " + styleDim + "(Ctrl-K create task)" + styleReset)
+	}
+	for _, t := range tasks {
+		if row > maxRow {
+			break
+		}
+		focused := t.ID == focusTask
+		var prefix, openStyle string
+		if focused {
+			prefix = " " + styleAccent + "▎" + styleReset + " "
+			openStyle = styleBold
+		} else {
+			prefix = "   "
+			openStyle = styleHint
+		}
+		suffix := ""
+		if n := len(t.Worktrees); n > 0 {
+			suffix = " " + styleDim + fmt.Sprintf("%dw", n) + styleReset
+		}
+		budget := width - visibleLen(prefix) - visibleLen(suffix)
+		if budget < 1 {
+			budget = 1
+		}
+		nameCell := st.rowNameSlot("task:"+t.ID, t.Title, budget, focused)
+		write(prefix + openStyle + nameCell + styleReset + suffix)
+	}
+
+	if row+2 <= maxRow {
+		write("")
+	}
+
 	// Processes section — top-level command/terminal processes,
 	// session-wide (does not change when the user switches agent tabs).
 	writeHeader("Processes")