Add task sidebar workflow

internal/app/tree_test.go

@@ -1,6 +1,10 @@
 package app
 
-import "testing"
+import (
+	"testing"
+
+	"github.com/hjbdev/patterm/internal/task"
+)
 
 func TestVisibleSessionTreeScopesToFocusedRoot(t *testing.T) {
 	root1 := testChild("c1", "root1", "", StatusRunning)
@@ -125,6 +129,34 @@ func TestSidebarNavListIncludesProcessesAboveAgentTree(t *testing.T) {
 	}
 }
 
+func TestSidebarNavOrdersTasksBeforeProcessesAndPads(t *testing.T) {
+	p := testProcess("p1", "bun", StatusRunning)
+	r := testAgent("a1", "claude", "", StatusRunning)
+	tasks := []task.Task{{ID: "t1", Title: "Fix sidebar"}}
+	nav := sidebarNav([]*Child{p, r}, "a1", tasks, nil)
+	if len(nav) != 3 {
+		t.Fatalf("nav len = %d, want 3 (%+v)", len(nav), nav)
+	}
+	if !nav[0].isTask() || nav[0].taskID != "t1" {
+		t.Fatalf("first nav entry = %+v, want task t1", nav[0])
+	}
+	if !nav[1].isChild() || nav[1].childID != "p1" {
+		t.Fatalf("second nav entry = %+v, want process p1", nav[1])
+	}
+	if !nav[2].isChild() || nav[2].childID != "a1" {
+		t.Fatalf("third nav entry = %+v, want agent a1", nav[2])
+	}
+}
+
+func TestNextNavEntryWalksFromTaskToProcess(t *testing.T) {
+	p := testProcess("p1", "bun", StatusRunning)
+	tasks := []task.Task{{ID: "t1", Title: "Fix sidebar"}}
+	next := nextNavEntry([]*Child{p}, "", "", "t1", "", tasks, nil, +1)
+	if !next.isChild() || next.childID != "p1" {
+		t.Fatalf("task -> next = %+v, want process p1", next)
+	}
+}
+
 func TestSidebarNavListIncludesExitedProcesses(t *testing.T) {
 	p := testProcess("p1", "shell", StatusExited)
 	r := testAgent("a1", "claude", "", StatusRunning)