docs: update project status for editor-embedded Flow Assist

- Add Editor-Embedded Flow Assist to CURRENT-STATE.md in-progress items
- Update CLAUDE.md: fix stale lessons (#41, #46), add new patterns (#47 editor AI architecture, #48 orphan validation)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

CLAUDE.md

@@ -313,7 +313,7 @@ navigate(`/trees/${newTree.id}/edit`)
 
 **38. Alembic migrations MUST use sequential numbered prefixes:** Check `backend/alembic/versions/` for the highest numbered migration and use the next number. Format: `XXX_descriptive_name.py` (e.g., `040_add_whatever.py`). NEVER use auto-generated revision IDs like `0f1ca2af3647`. Always pass `--rev-id` flag: `alembic revision --autogenerate -m "desc" --rev-id=040`.
 
-**41. Assistant chat uses local React state, not a Zustand store:** `AssistantChatPage.tsx` manages `chats`, `activeChatId`, `messages`, `input`, `loading` as `useState`. The `aiChatStore.ts` is for the AI Chat Builder (tree generation), NOT the standalone assistant. Don't look for a store when modifying assistant chat.
+**41. Assistant chat uses local React state, not a Zustand store:** `AssistantChatPage.tsx` manages `chats`, `activeChatId`, `messages`, `input`, `loading` as `useState`. Don't look for a store when modifying assistant chat.
 
 **42. Public pages use raw `fetch()`, not `apiClient`:** Survey, shared sessions, and other no-auth pages call the API directly via `fetch()` with `${import.meta.env.VITE_API_URL || 'http://localhost:8000'}/api/v1/...`. Don't use `apiClient` — it requires auth tokens and uses relative paths.
 
@@ -323,7 +323,11 @@ navigate(`/trees/${newTree.id}/edit`)
 
 **45. Intake form field schema uses `variable_name` and `field_type`:** NOT `name` and `type`. Pattern: `{"variable_name": "server_name", "label": "Server Name", "field_type": "text", "required": true, "display_order": 1}`. Used in `tree_validation.py` and AI prompt examples.
 
-**46. `CreateFlowDropdown` navigates directly to Flow Assist:** No `onOpenAIBuilder` callback — it uses `navigate('/ai/chat?type=procedural')` etc. The `AIFlowBuilderModal` is the old wizard modal (separate from the chat-based Flow Assist page at `/ai/chat`).
+**46. `CreateFlowDropdown` uses `AIPromptDialog` for AI-assisted creation:** Opens a simple prompt dialog modal (not a separate page). The dialog starts an AI session, generates the flow, imports it, and navigates to the editor with `{ state: { aiPanelOpen: true, sessionId } }`. The old standalone `/ai/chat` page and `AIFlowBuilderModal` have been removed.
+
+**47. Editor-Embedded Flow Assist architecture:** AI assistance is embedded in each editor via `EditorAIPanel` (320px side panel) + `useEditorAI` hook + `ContextMenu`. Tree editor: panel replaces node editor panel (single-panel rule). Procedural editor: panel sits alongside step list (flex layout). Ghost nodes/steps use `_suggestion: true` flag with dashed borders + accept/dismiss controls. Action types (`generate_branch`, `modify_node`, `add_steps`, etc.) route to model tiers via `settings.get_model_for_action()`. Delta responses use `[DELTA]...[/DELTA]` markers. Suggestion audit trail in `ai_suggestions` table.
+
+**48. Tree orphan validation uses dynamic root ID:** `treeEditorStore.ts` orphan check compares against `state.treeStructure?.id` (NOT hardcoded `'root'`). AI-generated trees use descriptive root IDs like `"verify-account-exists"`.
 
 **47. AI provider architecture:** `AI_PROVIDER` in `config.py` selects `"anthropic"` or `"gemini"`. `get_ai_provider()` in `ai_provider.py` returns the configured provider with automatic fallback. `assistant_chat_service.py` calls Anthropic directly (with prompt caching + MCP), while copilot and Flow Assist go through the generic provider abstraction.
 

CURRENT-STATE.md

@@ -86,6 +86,7 @@
 
 | Task | Status | Notes |
 |------|--------|-------|
+| Editor-Embedded Flow Assist | In Progress | AI panel in tree + procedural editors, ghost node suggestions, action-type routing |
 | Step Library Frontend | In Progress | Backend complete, frontend UI pending |
 | Procedural Flows Lifecycle | In Progress | Resume support done, full run chooser/reuse pending |
 | Tree Forking UI | Planning | Backend schema complete (migration 022) |