feat(web): task management with list view and kanban board (#86)

Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>

apps/web/src/components/tasks/kanban-board.tsx

@@ -0,0 +1,47 @@
+'use client';
+
+import type { Task, TaskStatus } from '@/lib/types';
+import { TaskCard } from './task-card';
+
+interface KanbanBoardProps {
+  tasks: Task[];
+  onTaskClick: (task: Task) => void;
+}
+
+const columns: { id: TaskStatus; label: string }[] = [
+  { id: 'not-started', label: 'Not Started' },
+  { id: 'in-progress', label: 'In Progress' },
+  { id: 'blocked', label: 'Blocked' },
+  { id: 'done', label: 'Done' },
+];
+
+export function KanbanBoard({ tasks, onTaskClick }: KanbanBoardProps): React.ReactElement {
+  return (
+    <div className="flex gap-4 overflow-x-auto pb-4">
+      {columns.map((col) => {
+        const columnTasks = tasks.filter((t) => t.status === col.id);
+        return (
+          <div
+            key={col.id}
+            className="flex w-72 shrink-0 flex-col rounded-lg border border-surface-border bg-surface-elevated"
+          >
+            <div className="flex items-center justify-between border-b border-surface-border px-3 py-2">
+              <h3 className="text-sm font-medium text-text-secondary">{col.label}</h3>
+              <span className="rounded-full bg-surface-card px-2 py-0.5 text-xs text-text-muted">
+                {columnTasks.length}
+              </span>
+            </div>
+            <div className="flex-1 space-y-2 p-2">
+              {columnTasks.length === 0 && (
+                <p className="py-4 text-center text-xs text-text-muted">No tasks</p>
+              )}
+              {columnTasks.map((task) => (
+                <TaskCard key={task.id} task={task} onClick={onTaskClick} />
+              ))}
+            </div>
+          </div>
+        );
+      })}
+    </div>
+  );
+}