fix(web): fix kanban add-task tests

- Always render kanban columns even when no tasks exist, enabling task
  creation from empty state
- Add explicit submit (✓ Add) and Cancel buttons to inline add-task form
- Pass projectId from URL filter through to createTask API call
- Fixes both 'opens add-task form' and 'cancels add-task form' tests

apps/web/src/app/(authenticated)/kanban/page.tsx

@@ -184,10 +184,11 @@ function TaskCard({ task, provided, snapshot, columnAccent }: TaskCardProps): Re
 interface KanbanColumnProps {
   config: ColumnConfig;
   tasks: Task[];
-  onAddTask: (status: TaskStatus, title: string) => Promise<void>;
+  onAddTask: (status: TaskStatus, title: string, projectId?: string) => Promise<void>;
+  projectId?: string;
 }
 
-function KanbanColumn({ config, tasks, onAddTask }: KanbanColumnProps): ReactElement {
+function KanbanColumn({ config, tasks, onAddTask, projectId }: KanbanColumnProps): ReactElement {
   const [showAddForm, setShowAddForm] = useState(false);
   const [inputValue, setInputValue] = useState("");
   const [isSubmitting, setIsSubmitting] = useState(false);
@@ -208,7 +209,7 @@ function KanbanColumn({ config, tasks, onAddTask }: KanbanColumnProps): ReactEle
 
     setIsSubmitting(true);
     try {
-      await onAddTask(config.status, inputValue.trim());
+      await onAddTask(config.status, inputValue.trim(), projectId);
       setInputValue("");
       setShowAddForm(false);
     } catch (err) {
@@ -362,6 +363,45 @@ function KanbanColumn({ config, tasks, onAddTask }: KanbanColumnProps): ReactEle
             }}
             autoFocus
           />
+          <div style={{ display: "flex", gap: 6, marginTop: 6 }}>
+            <button
+              type="submit"
+              disabled={isSubmitting || !inputValue.trim()}
+              style={{
+                padding: "6px 12px",
+                borderRadius: "var(--r)",
+                border: "1px solid var(--primary)",
+                background: "var(--primary)",
+                color: "#fff",
+                fontSize: "0.8rem",
+                fontWeight: 500,
+                cursor: isSubmitting || !inputValue.trim() ? "not-allowed" : "pointer",
+                opacity: isSubmitting || !inputValue.trim() ? 0.5 : 1,
+              }}
+            >
+              ✓ Add
+            </button>
+            <button
+              type="button"
+              onClick={() => {
+                setShowAddForm(false);
+                setInputValue("");
+              }}
+              disabled={isSubmitting}
+              style={{
+                padding: "6px 12px",
+                borderRadius: "var(--r)",
+                border: "1px solid var(--border)",
+                background: "transparent",
+                color: "var(--muted)",
+                fontSize: "0.8rem",
+                cursor: isSubmitting ? "not-allowed" : "pointer",
+                opacity: isSubmitting ? 0.5 : 1,
+              }}
+            >
+              Cancel
+            </button>
+          </div>
           <div style={{ marginTop: 6, fontSize: "0.75rem", color: "var(--muted)" }}>
             Press{" "}
             <kbd
@@ -745,10 +785,17 @@ export default function KanbanPage(): ReactElement {
   /* --- add task handler --- */
 
   const handleAddTask = useCallback(
-    async (status: TaskStatus, title: string) => {
+    async (status: TaskStatus, title: string, projectId?: string) => {
       try {
         const wsId = workspaceId ?? undefined;
-        const newTask = await createTask({ title, status }, wsId);
+        const taskData: { title: string; status: TaskStatus; projectId?: string } = {
+          title,
+          status,
+        };
+        if (projectId) {
+          taskData.projectId = projectId;
+        }
+        const newTask = await createTask(taskData, wsId);
         // Optimistically add to local state
         setTasks((prev) => [...prev, newTask]);
       } catch (err: unknown) {
@@ -866,23 +913,8 @@ export default function KanbanPage(): ReactElement {
             Clear filters
           </button>
         </div>
-      ) : tasks.length === 0 ? (
-        /* Empty state */
-        <div
-          style={{
-            background: "var(--surface)",
-            border: "1px solid var(--border)",
-            borderRadius: "var(--r-lg)",
-            padding: 48,
-            textAlign: "center",
-          }}
-        >
-          <p style={{ color: "var(--muted)", margin: 0, fontSize: "0.9rem" }}>
-            No tasks yet. Create some tasks to see them here.
-          </p>
-        </div>
       ) : (
-        /* Board */
+        /* Board (always render columns to allow adding first task) */
         <DragDropContext onDragEnd={handleDragEnd}>
           <div
             style={{
@@ -899,6 +931,7 @@ export default function KanbanPage(): ReactElement {
                 config={col}
                 tasks={grouped[col.status]}
                 onAddTask={handleAddTask}
+                projectId={filterProject}
               />
             ))}
           </div>