feature: Workspace Research And Planning

[falfaddaghi]

Summary

Adds a native workspace-scoped Research surface for collecting, organizing, enriching, synthesizing, importing/exporting, and promoting research artifacts inside Nexus Workflow Studio. The implementation introduces server-backed research spaces under each workspace, a full-screen /workspace/[id]/research experience, collaborative/autosave hooks, Nexus connector-based AI helpers, planning templates, and Brain promotion paths. It also documents the feature and includes unit coverage plus a dedicated E2E specification for the broader browser workflow.

Plan: docs/tasks/workspace-research-planning-e83335e2/plan-workspace-research-planning-e83335e2.md

ADW tracking ID: e83335e2

Checklist

• Added research domain types, Zod schemas, template seeds, content helpers, AI parsing, import/export, markdown export, collaboration, promotion, and client/server helpers.
• Implemented file-backed workspace research persistence and API routes for list/create/get/save/update/delete/enrich/synthesize/promote flows.
• Added the workspace Research route and native research UI components for spaces, tiles, views, synthesis, templates, import/export, and promotion.
• Wired workspace dashboard navigation to /workspace/${workspaceId}/research while keeping existing workspace flows available.
• Added research hooks and store support for spaces, collaboration, autosave, selection, view mode, AI state, and local-first editing.
• Added unit tests for schemas, persistence, templates, AI parsing, collaboration, import/export, markdown export, and promotion.
• Created the separate workspace Research E2E specification document and updated README feature documentation.

Key Changes

• Introduces src/lib/research/* modules for research schemas, persistence, collaboration room IDs, .nodepad portability, markdown export, AI enrichment/synthesis parsing, and Brain promotion conversion.
• Adds workspace research API routes under /api/workspaces/[id]/research-spaces with full CRUD and action endpoints.
• Adds a native /workspace/[id]/research page and research component namespace with tiling, kanban, graph, tile index, synthesis, command input, template, import/export, and promotion surfaces.
• Adds hooks and store modules for research space loading, local-first state, collaboration, and debounced autosave.
• Adds regression-oriented unit coverage and a task-local E2E spec for the required browser workflow.