apps/web/src/app/(dashboard)/tasks/page.tsx

@@ -0,0 +1,72 @@
+'use client';
+
+import { useCallback, useEffect, useState } from 'react';
+import { api } from '@/lib/api';
+import { cn } from '@/lib/cn';
+import type { Task } from '@/lib/types';
+import { KanbanBoard } from '@/components/tasks/kanban-board';
+import { TaskListView } from '@/components/tasks/task-list-view';
+
+type ViewMode = 'list' | 'kanban';
+
+export default function TasksPage(): React.ReactElement {
+  const [tasks, setTasks] = useState<Task[]>([]);
+  const [view, setView] = useState<ViewMode>('kanban');
+  const [loading, setLoading] = useState(true);
+
+  useEffect(() => {
+    api<Task[]>('/api/tasks')
+      .then(setTasks)
+      .catch(() => {})
+      .finally(() => setLoading(false));
+  }, []);
+
+  const handleTaskClick = useCallback((task: Task) => {
+    // Task detail view will be added in future iteration
+    console.log('Task clicked:', task.id);
+  }, []);
+
+  return (
+    <div>
+      <div className="mb-6 flex items-center justify-between">
+        <h1 className="text-2xl font-semibold">Tasks</h1>
+        <div className="flex items-center gap-2">
+          <div className="flex rounded-lg border border-surface-border">
+            <button
+              type="button"
+              onClick={() => setView('list')}
+              className={cn(
+                'px-3 py-1.5 text-xs transition-colors',
+                view === 'list'
+                  ? 'bg-surface-elevated text-text-primary'
+                  : 'text-text-muted hover:text-text-secondary',
+              )}
+            >
+              List
+            </button>
+            <button
+              type="button"
+              onClick={() => setView('kanban')}
+              className={cn(
+                'px-3 py-1.5 text-xs transition-colors',
+                view === 'kanban'
+                  ? 'bg-surface-elevated text-text-primary'
+                  : 'text-text-muted hover:text-text-secondary',
+              )}
+            >
+              Kanban
+            </button>
+          </div>
+        </div>
+      </div>
+
+      {loading ? (
+        <p className="py-8 text-center text-sm text-text-muted">Loading tasks...</p>
+      ) : view === 'kanban' ? (
+        <KanbanBoard tasks={tasks} onTaskClick={handleTaskClick} />
+      ) : (
+        <TaskListView tasks={tasks} onTaskClick={handleTaskClick} />
+      )}
+    </div>
+  );
+}

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>
+  );
+}

apps/web/src/components/tasks/task-card.tsx

@@ -0,0 +1,57 @@
+'use client';
+
+import { cn } from '@/lib/cn';
+import type { Task } from '@/lib/types';
+
+interface TaskCardProps {
+  task: Task;
+  onClick: (task: Task) => void;
+}
+
+const priorityColors: Record<string, string> = {
+  critical: 'text-error',
+  high: 'text-warning',
+  medium: 'text-blue-400',
+  low: 'text-text-muted',
+};
+
+const statusBadgeColors: Record<string, string> = {
+  'not-started': 'bg-gray-600/20 text-gray-300',
+  'in-progress': 'bg-blue-600/20 text-blue-400',
+  blocked: 'bg-error/20 text-error',
+  done: 'bg-success/20 text-success',
+  cancelled: 'bg-gray-600/20 text-gray-500',
+};
+
+export function TaskCard({ task, onClick }: TaskCardProps): React.ReactElement {
+  return (
+    <button
+      type="button"
+      onClick={() => onClick(task)}
+      className="w-full rounded-lg border border-surface-border bg-surface-card p-3 text-left transition-colors hover:border-gray-500"
+    >
+      <div className="flex items-start justify-between gap-2">
+        <span className="text-sm font-medium text-text-primary">{task.title}</span>
+        <span className={cn('text-xs', priorityColors[task.priority])}>{task.priority}</span>
+      </div>
+      {task.description && (
+        <p className="mt-1 line-clamp-2 text-xs text-text-muted">{task.description}</p>
+      )}
+      <div className="mt-2 flex items-center gap-2">
+        <span
+          className={cn(
+            'rounded-full px-2 py-0.5 text-xs',
+            statusBadgeColors[task.status] ?? 'bg-gray-600/20 text-gray-400',
+          )}
+        >
+          {task.status}
+        </span>
+        {task.dueDate && (
+          <span className="text-xs text-text-muted">
+            {new Date(task.dueDate).toLocaleDateString()}
+          </span>
+        )}
+      </div>
+    </button>
+  );
+}

apps/web/src/components/tasks/task-list-view.tsx

@@ -0,0 +1,67 @@
+'use client';
+
+import { cn } from '@/lib/cn';
+import type { Task } from '@/lib/types';
+
+interface TaskListViewProps {
+  tasks: Task[];
+  onTaskClick: (task: Task) => void;
+}
+
+const priorityColors: Record<string, string> = {
+  critical: 'text-error',
+  high: 'text-warning',
+  medium: 'text-blue-400',
+  low: 'text-text-muted',
+};
+
+const statusColors: Record<string, string> = {
+  'not-started': 'text-gray-400',
+  'in-progress': 'text-blue-400',
+  blocked: 'text-error',
+  done: 'text-success',
+  cancelled: 'text-gray-500',
+};
+
+export function TaskListView({ tasks, onTaskClick }: TaskListViewProps): React.ReactElement {
+  if (tasks.length === 0) {
+    return <p className="py-8 text-center text-sm text-text-muted">No tasks found</p>;
+  }
+
+  return (
+    <div className="overflow-hidden rounded-lg border border-surface-border">
+      <table className="w-full">
+        <thead>
+          <tr className="border-b border-surface-border bg-surface-elevated text-left text-xs text-text-muted">
+            <th className="px-4 py-2 font-medium">Title</th>
+            <th className="px-4 py-2 font-medium">Status</th>
+            <th className="px-4 py-2 font-medium">Priority</th>
+            <th className="hidden px-4 py-2 font-medium md:table-cell">Due</th>
+          </tr>
+        </thead>
+        <tbody>
+          {tasks.map((task) => (
+            <tr
+              key={task.id}
+              onClick={() => onTaskClick(task)}
+              className="cursor-pointer border-b border-surface-border transition-colors last:border-b-0 hover:bg-surface-elevated"
+            >
+              <td className="px-4 py-3 text-sm text-text-primary">{task.title}</td>
+              <td className="px-4 py-3">
+                <span className={cn('text-xs', statusColors[task.status])}>{task.status}</span>
+              </td>
+              <td className="px-4 py-3">
+                <span className={cn('text-xs', priorityColors[task.priority])}>
+                  {task.priority}
+                </span>
+              </td>
+              <td className="hidden px-4 py-3 text-xs text-text-muted md:table-cell">
+                {task.dueDate ? new Date(task.dueDate).toLocaleDateString() : '—'}
+              </td>
+            </tr>
+          ))}
+        </tbody>
+      </table>
+    </div>
+  );
+}

apps/web/src/lib/types.ts

@@ -17,3 +17,41 @@ export interface Message {
   metadata?: Record<string, unknown>;
   createdAt: string;
 }
+
+/** Task statuses. */
+export type TaskStatus = 'not-started' | 'in-progress' | 'blocked' | 'done' | 'cancelled';
+
+/** Task priorities. */
+export type TaskPriority = 'critical' | 'high' | 'medium' | 'low';
+
+/** Task returned by the gateway API. */
+export interface Task {
+  id: string;
+  title: string;
+  description: string | null;
+  status: TaskStatus;
+  priority: TaskPriority;
+  projectId: string | null;
+  missionId: string | null;
+  assignee: string | null;
+  tags: string[] | null;
+  dueDate: string | null;
+  metadata: Record<string, unknown> | null;
+  createdAt: string;
+  updatedAt: string;
+}
+
+/** Project statuses. */
+export type ProjectStatus = 'active' | 'paused' | 'completed' | 'archived';
+
+/** Project returned by the gateway API. */
+export interface Project {
+  id: string;
+  name: string;
+  description: string | null;
+  status: ProjectStatus;
+  userId: string;
+  metadata: Record<string, unknown> | null;
+  createdAt: string;
+  updatedAt: string;
+}

docs/TASKS.md

@@ -31,8 +31,8 @@
 | P2-007 | done        | Phase 2   | Verify Phase 2 — multi-provider routing works                 | #79 | #25   |
 | P3-001 | done        | Phase 3   | apps/web scaffold — Next.js 16 + BetterAuth + Tailwind        | #82 | #26   |
 | P3-002 | done        | Phase 3   | Auth pages — login, registration, SSO redirect                | #83 | #27   |
-| P3-003 | in-progress | Phase 3   | Chat UI — conversations, messages, streaming                  | —   | #28   |
-| P3-004 | not-started | Phase 3   | Task management — list view + kanban board                    | —   | #29   |
+| P3-003 | done        | Phase 3   | Chat UI — conversations, messages, streaming                  | #84 | #28   |
+| P3-004 | in-progress | Phase 3   | Task management — list view + kanban board                    | —   | #29   |
 | P3-005 | not-started | Phase 3   | Project & mission views — dashboard + PRD viewer              | —   | #30   |
 | P3-006 | not-started | Phase 3   | Settings — provider config, profile, integrations             | —   | #31   |
 | P3-007 | not-started | Phase 3   | Admin panel — user management, RBAC                           | —   | #32   |