3 files changed, 21 insertions, 8 deletions
diff --git a/internal/handlers/chains_test.go b/internal/handlers/chains_test.go
index 0ebcc7a..bf657d1 100644
--- a/internal/handlers/chains_test.go
+++ b/internal/handlers/chains_test.go
@@ -9,6 +9,8 @@ import (
 	"testing"
 
 	"github.com/go-chi/chi/v5"
+
+	"task-dashboard/internal/models"
 )
 
 func withURLParam(req *http.Request, key, value string) *http.Request {
@@ -22,7 +24,7 @@ func TestHandleWidgetChainsCreate_CreatesChain(t *testing.T) {
 	defer cleanup()
 	h := &Handler{store: db}
 
-	body := `{"name":"Ham Radio Track","tasks":["Study Technician","Pass exam"]}`
+	body := `{"name":"Ham Radio Track","tasks":[{"content":"Study Technician"},{"content":"Pass exam","description":"Pick a date","priority":3}]}`
 	req := httptest.NewRequest("POST", "/api/widget/chains", strings.NewReader(body))
 	w := httptest.NewRecorder()
 	h.HandleWidgetChainsCreate(w, req)
@@ -67,7 +69,7 @@ func TestHandleWidgetChainGet_ReturnsChainAndTasks(t *testing.T) {
 	defer cleanup()
 	h := &Handler{store: db}
 
-	chain, err := h.store.CreateChain("Track", []string{"Step 1", "Step 2"})
+	chain, err := h.store.CreateChain("Track", []models.ChainTaskInput{{Content: "Step 1"}, {Content: "Step 2"}})
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -107,7 +109,7 @@ func TestHandleWidgetChainsPauseResumeAbandon(t *testing.T) {
 	defer cleanup()
 	h := &Handler{store: db}
 
-	chain, err := h.store.CreateChain("Track", []string{"Step 1", "Step 2"})
+	chain, err := h.store.CreateChain("Track", []models.ChainTaskInput{{Content: "Step 1"}, {Content: "Step 2"}})
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/internal/handlers/chains_timeline_test.go b/internal/handlers/chains_timeline_test.go
index 76ceb68..e9c8a3a 100644
--- a/internal/handlers/chains_timeline_test.go
+++ b/internal/handlers/chains_timeline_test.go
@@ -4,13 +4,17 @@ import (
 	"context"
 	"testing"
 	"time"
+
+	"task-dashboard/internal/models"
 )
 
 func TestBuildTimeline_PopulatesChainBadgeForUnlockedTask(t *testing.T) {
 	s, cleanup := setupTestDB(t)
 	defer cleanup()
 
-	chain, err := s.CreateChain("Ham Radio Track", []string{"Study Technician", "Pass exam", "Study General"})
+	chain, err := s.CreateChain("Ham Radio Track", []models.ChainTaskInput{
+		{Content: "Study Technician"}, {Content: "Pass exam"}, {Content: "Study General"},
+	})
 	if err != nil {
 		t.Fatal(err)
 	}
diff --git a/internal/handlers/widget.go b/internal/handlers/widget.go
index de2e856..a7f7b66 100644
--- a/internal/handlers/widget.go
+++ b/internal/handlers/widget.go
@@ -963,8 +963,8 @@ func (h *Handler) HandleWidgetLabelsBudgetTracked(w http.ResponseWriter, r *http
 }
 
 type chainCreateRequest struct {
-	Name  string   `json:"name"`
-	Tasks []string `json:"tasks"`
+	Name  string                  `json:"name"`
+	Tasks []models.ChainTaskInput `json:"tasks"`
 }
 
 type chainCreateResponse struct {
@@ -972,8 +972,9 @@ type chainCreateResponse struct {
 }
 
 // HandleWidgetChainsCreate creates a linear task chain: a backing project
-// plus one native_tasks row per title in req.Tasks, position 0 unlocked and
-// due now, the rest locked with no due date.
+// plus one native_tasks row per entry in req.Tasks (content required;
+// description and priority optional, priority defaulting to 1), position 0
+// unlocked and due now, the rest locked with no due date.
 func (h *Handler) HandleWidgetChainsCreate(w http.ResponseWriter, r *http.Request) {
 	var req chainCreateRequest
 	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
@@ -984,6 +985,12 @@ func (h *Handler) HandleWidgetChainsCreate(w http.ResponseWriter, r *http.Reques
 		http.Error(w, "name and at least one task are required", http.StatusBadRequest)
 		return
 	}
+	for _, t := range req.Tasks {
+		if strings.TrimSpace(t.Content) == "" {
+			http.Error(w, "every task requires non-empty content", http.StatusBadRequest)
+			return
+		}
+	}
 	chain, err := h.store.CreateChain(req.Name, req.Tasks)
 	if err != nil {
 		http.Error(w, "failed to create chain", http.StatusInternalServerError)