chore: add plan files for Phase 2 enhanced features

plans/phase-2-enhanced-features/PLAN.md

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+# Feature: Phase 2 — Enhanced Features
+
+**Branch:** `feature/phase-2-enhanced-features`
+**Base branch:** `master`
+**Created:** 2026-03-24
+**Status:** 🟡 In Progress
+**Strategy:** Big Bang
+**Mode:** Automated
+**Execution:** Orchestrator
+
+## Summary
+Add OAuth/Authentik integration, drag-and-drop reordering, localization (EN/RU), additional widget types (bookmark, note, embed, status), and per-board access control UI.
+
+## Build & Test Commands
+- **Build:** `npm run build`
+- **Test:** `npm test`
+- **Lint:** `npm run lint`
+- **Type Check:** `npm run check`
+
+## Phases
+
+- [ ] Phase 1: OAuth/Authentik Integration [fullstack] → [subplan](./phase-1-oauth.md)
+- [ ] Phase 2: Drag-and-Drop Reordering [frontend] → [subplan](./phase-2-dnd.md)
+- [ ] Phase 3: Localization EN/RU [fullstack] → [subplan](./phase-3-localization.md)
+- [ ] Phase 4: Additional Widget Types [fullstack] → [subplan](./phase-4-widgets.md)
+- [ ] Phase 5: Per-Board Access Control UI [fullstack] → [subplan](./phase-5-access-control.md)
+- [ ] Phase 6: Integration & Polish [fullstack] → [subplan](./phase-6-integration.md)
+
+## Phase Progress Log
+
+| Phase | Domain | Status | Review | Build | Committed |
+|-------|--------|--------|--------|-------|-----------|
+| Phase 1: OAuth | fullstack | ⬜ Not Started | ⬜ | ⬜ | ⬜ |
+| Phase 2: DnD | frontend | ⬜ Not Started | ⬜ | ⬜ | ⬜ |
+| Phase 3: Localization | fullstack | ⬜ Not Started | ⬜ | ⬜ | ⬜ |
+| Phase 4: Widgets | fullstack | ⬜ Not Started | ⬜ | ⬜ | ⬜ |
+| Phase 5: Access Control | fullstack | ⬜ Not Started | ⬜ | ⬜ | ⬜ |
+| Phase 6: Integration | fullstack | ⬜ Not Started | ⬜ | ⬜ | ⬜ |
+
+## Final Review
+- [ ] Comprehensive code review
+- [ ] Full build passes
+- [ ] Full test suite passes
+- [ ] Merged to `master`