feat(tui): show dependency readiness on the task board

Each task row gets a 2-col glyph — ● ready (workable now) / ○ waiting (blocked) /
blank — and the detail pane shows "ready to work" or "blocked — waiting on <ids>",
fed by the new GET /tasks ready/blockedBy fields. Makes a decomposed graph legible
at a glance; a dependency-blocked task is status TODO (not the red BLOCKED lifecycle
state), so the glyph is what distinguishes them.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

apps/tui-go/internal/app/tasks_overlay.go

@@ -27,6 +27,10 @@ type TaskSummary struct {
 	Notes              []TaskNoteWire `json:"notes"`
 	CreatedAt          string         `json:"createdAt"`
 	UpdatedAt          string         `json:"updatedAt"`
+	// Dependency-graph status from the server: Ready = workable now (TODO, no unmet deps);
+	// BlockedBy = ids of unfinished tasks this one waits on. Absent on older servers → zero values.
+	Ready     bool     `json:"ready"`
+	BlockedBy []string `json:"blockedBy"`
 }
 
 type TaskLinkWire struct {
@@ -336,14 +340,29 @@ func (m Model) taskListRow(tasks []TaskSummary, i int) string {
 	if tk.Claimant != "" {
 		claim = " @" + shortSessionID(tk.Claimant)
 	}
-	titleW := m.modalWidth() - 6 - 12 - 1 - 12 - 1 - len([]rune(claim))
+	readyCell := taskReadyCell(t, tk) // 2-col dependency-readiness glyph
+	titleW := m.modalWidth() - 6 - 12 - 1 - 12 - 1 - 2 - 1 - len([]rune(claim))
 	if titleW < 8 {
 		titleW = 8
 	}
 	titleCell := mbg(t, padRaw(truncate(tk.Title, titleW), titleW), t.P.Fg)
 	claimCell := mbg(t, claim, t.P.Faint)
 
-	return marker + idCell + " " + statusCell + " " + titleCell + claimCell
+	return marker + idCell + " " + statusCell + " " + readyCell + " " + titleCell + claimCell
+}
+
+// taskReadyCell is a 2-column glyph showing dependency-graph readiness, so a decomposed graph reads
+// at a glance: a filled dot when the task is workable now (TODO, no unmet deps), a hollow dot when it
+// is waiting on unfinished blockers, blank for anything already in flight or finished.
+func taskReadyCell(t Theme, tk TaskSummary) string {
+	switch {
+	case tk.Ready:
+		return lipgloss.NewStyle().Foreground(t.P.OK).Background(t.P.BgPanel).Render(padRaw("●", 2))
+	case len(tk.BlockedBy) > 0:
+		return lipgloss.NewStyle().Foreground(t.P.Dim).Background(t.P.BgPanel).Render(padRaw("○", 2))
+	default:
+		return mbg(t, "  ", t.P.BgPanel)
+	}
 }
 
 func (m Model) taskDetailModal() string {
@@ -407,6 +426,11 @@ func (m Model) taskDetailBody(width int) []string {
 	if tk.Claimant != "" {
 		out = append(out, mbg(t, "claimant: "+tk.Claimant, t.P.Faint))
 	}
+	if tk.Ready {
+		out = append(out, mbg(t, "● ready to work (no unmet dependencies)", t.P.OK))
+	} else if len(tk.BlockedBy) > 0 {
+		out = append(out, mbg(t, "○ blocked — waiting on "+strings.Join(tk.BlockedBy, ", "), t.P.Dim))
+	}
 	out = append(out, "")
 
 	if tk.Goal != "" {

apps/tui-go/internal/app/tasks_overlay_test.go

@@ -148,6 +148,26 @@ func TestTasksFilterNarrowsList(t *testing.T) {
 	}
 }
 
+func TestTasksReadyAndBlockedSurfaced(t *testing.T) {
+	m := tasksModel()
+	m.overlay = OverlayTasks
+	m.taskList = []TaskSummary{
+		{ID: "webui-2", Key: "webui-2", Status: "TODO", Title: "Scaffold app", Ready: true},
+		{ID: "webui-3", Key: "webui-3", Status: "TODO", Title: "Auth view", BlockedBy: []string{"webui-2"}},
+	}
+
+	// A ready task's detail says so; a blocked task's detail names what it waits on.
+	m.taskDetail = true
+	m.taskListIndex = 0
+	if out := m.tasksModal(); !strings.Contains(out, "ready to work") {
+		t.Fatalf("expected ready marker in detail:\n%s", out)
+	}
+	m.taskListIndex = 1
+	if out := m.tasksModal(); !strings.Contains(out, "waiting on webui-2") {
+		t.Fatalf("expected blocked-by detail naming the blocker:\n%s", out)
+	}
+}
+
 func TestTasksFetchErrorShownNoPanic(t *testing.T) {
 	m := tasksModel()
 	m.overlay = OverlayTasks