SaaS Dashboard

Update the landing page:
- Change the headline to "Project Management Made Simple"
- Update the subheadline to describe project management features
- Modify the feature cards to show: Task Tracking, Team Collaboration, Progress Reports
- Update the pricing section with three tiers: Starter ($9/mo), Pro ($29/mo), Team ($79/mo)

Create these database tables:

1. projects
   - id (uuid, primary key)
   - name (text)
   - description (text)
   - user_id (uuid, references auth.users)
   - created_at (timestamp)

2. tasks
   - id (uuid, primary key)
   - title (text)
   - description (text)
   - status (text: 'todo', 'in_progress', 'done')
   - project_id (uuid, references projects)
   - assigned_to (uuid, nullable)
   - due_date (date, nullable)
   - created_at (timestamp)

Add RLS policies so users only see their own projects and tasks.

Create a projects dashboard that shows:
- Grid of project cards
- Each card shows: name, description preview, task count, last updated
- "New Project" button in the top right
- Empty state if no projects exist

Create a project detail page at /dashboard/projects/[id] that shows:
- Project name and description at top
- Task list with columns: To Do, In Progress, Done (Kanban style)
- Ability to drag tasks between columns
- Add task button that opens a modal

Add a "Create Project" modal with:
- Name input (required)
- Description textarea
- Cancel and Create buttons
- Save to database on create
- Redirect to the new project after creation

Create a task card component showing:
- Task title
- Due date (if set)
- Assignee avatar (if assigned)
- Status indicator
- Click to open detail view

Create an "Add Task" form with:
- Title (required)
- Description
- Due date picker
- Status dropdown
- Save to the project's task list

Add task actions:
- Click to edit task details
- Mark as complete (moves to Done column)
- Delete task (with confirmation)

Add team invitation:
- Settings page with "Team" tab
- Invite by email input
- Pending invitations list
- Team member list with remove option

Update tasks to support assignment:
- Dropdown to select team member
- Show assignee on task card
- Filter tasks by assignee

Add Stripe subscription:
- Pricing page with plan comparison
- "Subscribe" buttons that create Stripe checkout sessions
- Webhook handling for subscription events
- Update user's plan in database after successful payment
- Show current plan in settings

Add subscription management:
- Current plan display
- "Manage Subscription" button that opens Stripe portal
- Cancel subscription option

Add loading states:
- Skeleton loaders for project cards
- Loading spinner for task operations
- Disable buttons during async actions

Add empty states:
- No projects: "Create your first project"
- No tasks: "Add a task to get started"
- No team members: "Invite your team"

Make the dashboard mobile-friendly:
- Collapsible sidebar on mobile
- Stacked layout for task columns
- Touch-friendly interactions