feat(web): tasks board — org tasks as kanban/list with prompt-first create

[rafavalls]

Summary

Adds a Tasks board at /$org/tasks showing the org's tasks (threads) as a kanban or list, driven entirely by real data — no mocks.

• Columns are the real thread statuses: in progress, needs review, done, failed (the virtual expired status buckets into failed but is never written back). Status icons/colors reuse lib/task-status.ts so the board speaks the same language as the tasks panel.
• Drag to move: dropping a card on another column persists the status through ThreadManager.setStatus (optimistic + server).
• Live data: reads the same useThreads() store the sidebar uses, so cards update as runs progress; "Load more" pages through history.
• Filters: Linear-style multi-select chips for Agent (from the agents actually present on the board) and Origin (started by a person vs automation-triggered), plus a list/board layout toggle.
• New task: a prompt-first dialog — describe the task, pick the agent (defaults to Decopilot), and the prompt is handed to a freshly created thread via the autosend channel (the same handoff the chat uses for follow-up tasks), so the agent starts working immediately.
• Sidebar gets a Tasks entry between Home and Library.

Testing

• bun run check, bun run lint, bun run fmt all pass (the 2 lint warnings are pre-existing on main in packages/sandbox/daemon/org-fs).
• UI extracted from the product-redesign mockup branch and rewired onto real threads.

🤖 Generated with Claude Code

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Summary by cubic

Adds a Tasks board at /$org/tasks to view and manage org tasks as a kanban or list. Supports live updates, drag-and-drop status changes, filters, and a prompt-first flow to create and start tasks immediately.

• New Features

  • Tasks board with real statuses as columns (in progress, needs review, done, failed; expired shows under failed but isn’t persisted).
  • Drag a card between columns to persist status via the thread store (optimistic + server).
  • Live data from useThreads() with “Load more” pagination.
  • Filters: Agent (from agents on the board) and Origin (manual vs automation). Toggle between list and board.
  • New task dialog: write a prompt, pick an agent (defaults to Decopilot), create a thread, and autosend the prompt so work starts right away.

• Bug Fixes

  • Wrapped the board in the routed content card so it renders inside the standard page chrome (not on the sidebar background).

^{Written for commit 852279a. Summary will update on new commits.}