Improve UI: hierarchical navigation + task deletion

- Add delete button to tasks with confirmation
- Restructure Dashboard: select Project first, then view its Tasks
- Remove global Tasks tab, tasks are now scoped to project
- Add back button from project view to projects list
- Pre-select project when creating task from project view
- Make project cards clickable
- Better UX with clear navigation flow

Co-Authored-By: Claude Sonnet 4.5 (1M context) <noreply@anthropic.com>

src/components/CreateTaskModal.tsx

@@ -7,15 +7,23 @@ interface CreateTaskModalProps {
   onClose: () => void
   onCreated: () => void
   projects: Project[]
+  selectedProjectId?: string
 }
 
-export default function CreateTaskModal({ isOpen, onClose, onCreated, projects }: CreateTaskModalProps) {
+export default function CreateTaskModal({ isOpen, onClose, onCreated, projects, selectedProjectId }: CreateTaskModalProps) {
   const [formData, setFormData] = useState({
-    projectId: '',
+    projectId: selectedProjectId || '',
     title: '',
     description: '',
     priority: 'medium',
   })
+
+  // Update projectId when selectedProjectId changes
+  React.useEffect(() => {
+    if (selectedProjectId) {
+      setFormData((prev) => ({ ...prev, projectId: selectedProjectId }))
+    }
+  }, [selectedProjectId])
   const [loading, setLoading] = useState(false)
   const [error, setError] = useState('')
 

src/components/ProjectList.tsx

@@ -4,9 +4,10 @@ import type { Project } from '../types'
 interface ProjectListProps {
   projects: Project[]
   onRefresh: () => void
+  onSelectProject: (project: Project) => void
 }
 
-export default function ProjectList({ projects, onRefresh }: ProjectListProps) {
+export default function ProjectList({ projects, onRefresh, onSelectProject }: ProjectListProps) {
   const getStatusColor = (status: string) => {
     switch (status) {
       case 'active':
@@ -31,7 +32,11 @@ export default function ProjectList({ projects, onRefresh }: ProjectListProps) {
   return (
     <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-6">
       {projects.map((project) => (
-        <div key={project.id} className="bg-white rounded-lg shadow p-6">
+        <div
+          key={project.id}
+          className="bg-white rounded-lg shadow p-6 cursor-pointer hover:shadow-lg transition-shadow"
+          onClick={() => onSelectProject(project)}
+        >
           <div className="flex items-start justify-between">
             <div className="flex-1">
               <h3 className="text-lg font-semibold text-gray-900">{project.name}</h3>

src/components/TaskList.tsx

@@ -1,4 +1,5 @@
-import React from 'react'
+import React, { useState } from 'react'
+import apiClient from '../api/client'
 import type { Task } from '../types'
 
 interface TaskListProps {
@@ -7,6 +8,23 @@ interface TaskListProps {
 }
 
 export default function TaskList({ tasks, onRefresh }: TaskListProps) {
+  const [deleting, setDeleting] = useState<string | null>(null)
+
+  const handleDelete = async (taskId: string) => {
+    if (!confirm('Are you sure you want to delete this task?')) return
+
+    setDeleting(taskId)
+    try {
+      await apiClient.delete(`/tasks/${taskId}`)
+      onRefresh()
+    } catch (error) {
+      console.error('Failed to delete task:', error)
+      alert('Failed to delete task')
+    } finally {
+      setDeleting(null)
+    }
+  }
+
   const getStateColor = (state: string) => {
     switch (state) {
       case 'backlog':
@@ -54,8 +72,18 @@ export default function TaskList({ tasks, onRefresh }: TaskListProps) {
   return (
     <div className="space-y-4">
       {tasks.map((task) => (
-        <div key={task.id} className="bg-white rounded-lg shadow p-6">
-          <div className="flex items-start justify-between">
+        <div key={task.id} className="bg-white rounded-lg shadow p-6 relative">
+          <button
+            onClick={() => handleDelete(task.id)}
+            disabled={deleting === task.id}
+            className="absolute top-4 right-4 text-red-600 hover:text-red-800 disabled:opacity-50"
+            title="Delete task"
+          >
+            <svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+              <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M19 7l-.867 12.142A2 2 0 0116.138 21H7.862a2 2 0 01-1.995-1.858L5 7m5 4v6m4-6v6m1-10V4a1 1 0 00-1-1h-4a1 1 0 00-1 1v3M4 7h16" />
+            </svg>
+          </button>
+          <div className="flex items-start justify-between pr-8">
             <div className="flex-1">
               <div className="flex items-center space-x-3">
                 <h3 className="text-lg font-semibold text-gray-900">{task.title}</h3>

src/pages/Dashboard.tsx

@@ -13,10 +13,16 @@ export default function Dashboard() {
   const [tasks, setTasks] = useState<Task[]>([])
   const [agents, setAgents] = useState<Agent[]>([])
   const [loading, setLoading] = useState(true)
-  const [activeTab, setActiveTab] = useState<'projects' | 'tasks' | 'agents'>('projects')
+  const [selectedProject, setSelectedProject] = useState<Project | null>(null)
+  const [view, setView] = useState<'projects' | 'agents'>('projects')
   const [showProjectModal, setShowProjectModal] = useState(false)
   const [showTaskModal, setShowTaskModal] = useState(false)
 
+  // Filter tasks for selected project
+  const filteredTasks = selectedProject
+    ? tasks.filter((t) => t.projectId === selectedProject.id)
+    : []
+
   useEffect(() => {
     loadData()
     // Refresh data every 10 seconds
@@ -54,68 +60,85 @@ export default function Dashboard() {
       <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8 py-8">
         <div className="mb-8 flex items-center justify-between">
           <div>
-            <h1 className="text-3xl font-bold text-gray-900">AiWorker Dashboard</h1>
-            <p className="mt-2 text-gray-600">Manage your AI agents and development tasks</p>
+            {selectedProject ? (
+              <div>
+                <button
+                  onClick={() => setSelectedProject(null)}
+                  className="text-sm text-blue-600 hover:text-blue-800 mb-2 flex items-center"
+                >
+                  <svg className="w-4 h-4 mr-1" fill="none" stroke="currentColor" viewBox="0 0 24 24">
+                    <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M15 19l-7-7 7-7" />
+                  </svg>
+                  Back to Projects
+                </button>
+                <h1 className="text-3xl font-bold text-gray-900">{selectedProject.name}</h1>
+                <p className="mt-2 text-gray-600">{selectedProject.description || 'Project tasks and details'}</p>
+              </div>
+            ) : (
+              <div>
+                <h1 className="text-3xl font-bold text-gray-900">AiWorker Dashboard</h1>
+                <p className="mt-2 text-gray-600">Manage your AI agents and development tasks</p>
+              </div>
+            )}
           </div>
           <div className="flex space-x-3">
-            <button
-              onClick={() => setShowProjectModal(true)}
-              className="px-4 py-2 bg-blue-600 text-white rounded-md hover:bg-blue-700 text-sm font-medium"
-            >
-              New Project
-            </button>
-            <button
-              onClick={() => setShowTaskModal(true)}
-              className="px-4 py-2 bg-blue-600 text-white rounded-md hover:bg-blue-700 text-sm font-medium"
-            >
-              New Task
-            </button>
+            {selectedProject ? (
+              <button
+                onClick={() => setShowTaskModal(true)}
+                className="px-4 py-2 bg-blue-600 text-white rounded-md hover:bg-blue-700 text-sm font-medium"
+              >
+                New Task
+              </button>
+            ) : (
+              <button
+                onClick={() => setShowProjectModal(true)}
+                className="px-4 py-2 bg-blue-600 text-white rounded-md hover:bg-blue-700 text-sm font-medium"
+              >
+                New Project
+              </button>
+            )}
           </div>
         </div>
 
         <StatsCards projects={projects} tasks={tasks} agents={agents} />
 
-        {/* Tabs */}
-        <div className="border-b border-gray-200 mb-6">
-          <nav className="flex space-x-8">
-            <button
-              onClick={() => setActiveTab('projects')}
-              className={`py-4 px-1 border-b-2 font-medium text-sm ${
-                activeTab === 'projects'
-                  ? 'border-blue-500 text-blue-600'
-                  : 'border-transparent text-gray-500 hover:text-gray-700 hover:border-gray-300'
-              }`}
-            >
-              Projects ({projects.length})
-            </button>
-            <button
-              onClick={() => setActiveTab('tasks')}
-              className={`py-4 px-1 border-b-2 font-medium text-sm ${
-                activeTab === 'tasks'
-                  ? 'border-blue-500 text-blue-600'
-                  : 'border-transparent text-gray-500 hover:text-gray-700 hover:border-gray-300'
-              }`}
-            >
-              Tasks ({tasks.length})
-            </button>
-            <button
-              onClick={() => setActiveTab('agents')}
-              className={`py-4 px-1 border-b-2 font-medium text-sm ${
-                activeTab === 'agents'
-                  ? 'border-blue-500 text-blue-600'
-                  : 'border-transparent text-gray-500 hover:text-gray-700 hover:border-gray-300'
-              }`}
-            >
-              Agents ({agents.length})
-            </button>
-          </nav>
-        </div>
+        {/* Navigation */}
+        {!selectedProject && (
+          <div className="border-b border-gray-200 mb-6">
+            <nav className="flex space-x-8">
+              <button
+                onClick={() => setView('projects')}
+                className={`py-4 px-1 border-b-2 font-medium text-sm ${
+                  view === 'projects'
+                    ? 'border-blue-500 text-blue-600'
+                    : 'border-transparent text-gray-500 hover:text-gray-700 hover:border-gray-300'
+                }`}
+              >
+                Projects ({projects.length})
+              </button>
+              <button
+                onClick={() => setView('agents')}
+                className={`py-4 px-1 border-b-2 font-medium text-sm ${
+                  view === 'agents'
+                    ? 'border-blue-500 text-blue-600'
+                    : 'border-transparent text-gray-500 hover:text-gray-700 hover:border-gray-300'
+                }`}
+              >
+                Agents ({agents.length})
+              </button>
+            </nav>
+          </div>
+        )}
 
         {/* Content */}
         <div>
-          {activeTab === 'projects' && <ProjectList projects={projects} onRefresh={loadData} />}
-          {activeTab === 'tasks' && <TaskList tasks={tasks} onRefresh={loadData} />}
-          {activeTab === 'agents' && <AgentStatus agents={agents} onRefresh={loadData} />}
+          {selectedProject ? (
+            <TaskList tasks={filteredTasks} onRefresh={loadData} />
+          ) : view === 'projects' ? (
+            <ProjectList projects={projects} onRefresh={loadData} onSelectProject={setSelectedProject} />
+          ) : (
+            <AgentStatus agents={agents} onRefresh={loadData} />
+          )}
         </div>
       </div>
 
@@ -130,6 +153,7 @@ export default function Dashboard() {
         onClose={() => setShowTaskModal(false)}
         onCreated={loadData}
         projects={projects}
+        selectedProjectId={selectedProject?.id}
       />
     </div>
   )