docs: update architecture and features for calendar + RAG scoping

- architecture.md: add Event model, services/events.py, routes/events.py,
  CalendarView.vue, EventSlideOver.vue; update Conversation and Project
  data model tables with new columns; update RAG Pipeline section with
  three-value scope system, search_projects/set_rag_scope tools, and
  project summary background job; fix dead-code note for models/event.py;
  update execute_tool() signature docs; add services/projects.py entry
- features.md: replace CalDAV section with full Calendar section covering
  internal store, AI tools, HomeView widget, and optional CalDAV sync;
  update AI Chat scope chip description; remove done "Calendar view" item
  from roadmap

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

docs/architecture.md

@@ -137,14 +137,14 @@ Composite PK `(user_id, key)`. Per-user key-value store. CRUD via `services/sett
 
 ### Conversations / Messages
 
-`conversations`: `id`, `title`, `model`, `user_id`, `conversation_type` (`chat`/`briefing`/`mcp`), `briefing_date`, `created_at`, `updated_at`.
+`conversations`: `id`, `title`, `model`, `user_id`, `conversation_type` (`chat`/`briefing`/`mcp`), `briefing_date`, `rag_project_id` (nullable int — RAG scope: NULL=orphan-only, -1=all, positive=project), `created_at`, `updated_at`.
 `messages`: `id`, `conversation_id` FK CASCADE, `role` (`user`/`assistant`), `content`, `status` (`done`/`generating`), `created_at`.
 
 Title auto-generated by LLM on first exchange, re-generated every 10th message.
 
 ### Projects / Milestones
 
-`projects`: `id`, `user_id`, `title`, `description`, `goal`, `status` (`active`/`completed`/`archived`), `color`, timestamps.
+`projects`: `id`, `user_id`, `title`, `description`, `goal`, `status` (`active`/`completed`/`archived`), `color`, `auto_summary` (nullable text — LLM-generated summary for `search_projects` scoring), `summary_updated_at` (nullable timestamptz), timestamps.
 `milestones`: `id`, `user_id`, `project_id` FK CASCADE, `title`, `description`, `status`, `order_index`, timestamps.
 
 ### Sharing & Access
@@ -184,7 +184,7 @@ Permission resolution is centralised in `services/access.py`. `get_project_permi
 | `models/conversation.py` | `Conversation` + `Message` models |
 | `models/app_log.py` | `AppLog` with `category`, denormalised `username`, `details` JSONB |
 | `models/api_key.py` | `ApiKey`: `id`, `user_id`, `prefix`, `key_hash` (SHA-256), `name`, `scope` (`read`/`write`), `created_at`, `last_used_at` |
-| `models/event.py` | Dead code — CalDAV/Radicale internal events table. Radicale was trialled and removed; `calendar_sync.py` is also dead. |
+| `models/event.py` | Internal events store (`Event` model: `id`, `user_id`, `title`, `description`, `start_dt`, `end_dt`, `all_day`, `location`, `caldav_uid` nullable, `color`, timestamps) |
 | `routes/api.py` | `/api` blueprint; `GET /api/health` (public) |
 | `routes/auth.py` | Register, login, logout, me, password/email change, password reset, invite registration, OAuth login+callback; rate limiting; `LOCAL_AUTH_ENABLED` guards |
 | `routes/admin.py` | Backup, restore, user management, registration toggle, invitations, base URL, SMTP (admin only) |
@@ -213,8 +213,9 @@ Permission resolution is centralised in `services/access.py`. `get_project_permi
 | `services/llm.py` | `build_context()`, RAG injection, history summarisation, `stream_chat_with_tools()`, URL fetching, SSRF guard |
 | `services/generation_task.py` | `run_generation()` — full chat pipeline: intent routing, tool loop, SSE fan-out, push notification; `run_assist_generation()` |
 | `services/intent.py` | `classify_intent()` — fast non-streaming LLM call; intent skip heuristic; `_PRIOR_WORK_REFS` fast-path |
-| `services/tools.py` | All LLM tool definitions + `execute_tool()` dispatcher; duplicate guards; `_resolve_project()` 4-step lookup |
+| `services/tools.py` | All LLM tool definitions + `execute_tool(user_id, tool_name, arguments, conv_id=None, workspace_project_id=None)` dispatcher; duplicate guards; `_resolve_project()` 4-step lookup; `search_projects` and `set_rag_scope` tools |
-| `services/embeddings.py` | `upsert_note_embedding()`, `semantic_search_notes()` (pgvector cosine similarity) |
+| `services/projects.py` | Project CRUD + `generate_project_summary()` (Ollama, fire-and-forget) + `backfill_project_summaries()` (startup) |
+| `services/embeddings.py` | `upsert_note_embedding()`, `semantic_search_notes(orphan_only=False)` (pgvector cosine similarity) |
 | `services/generation_buffer.py` | In-memory SSE event buffer; `cancel_event`; 60s cleanup; supports both chat (int keys) and assist (string keys) |
 | `services/notes.py` | Note CRUD, wikilink resolution, backlink queries, tag management |
 | `services/note_versions.py` | Version snapshot on save; restore-from-version; diff metadata |
@@ -231,7 +232,9 @@ Permission resolution is centralised in `services/access.py`. `get_project_permi
 | `services/briefing_conversations.py` | Briefing conversation persistence and history queries |
 | `services/briefing_profile.py` | Per-user profile note that the assistant updates over time |
 | `services/research.py` | SearXNG research pipeline: 5 sub-queries → parallel fetch → synthesis; `search_images` for image category |
-| `services/caldav.py` | Full CalDAV event/todo lifecycle; synchronous library calls in asyncio executor |
+| `services/events.py` | Internal events CRUD: `list_events`, `create_event`, `update_event`, `delete_event`, `get_event`; source of truth for all event LLM tools |
+| `routes/events.py` | `/api/events` — event CRUD routes |
+| `services/caldav.py` | Optional CalDAV sync — user-configured external server; syncs to/from internal store via `caldav_uid` FK; `is_caldav_configured()` guards tool activation |
 | `services/calendar_sync.py` | Dead code — Radicale sync service; was trialled and removed |
 | `services/images.py` | `fetch_and_store_image()` — SHA-256 dedup, content-type validation, 5 MB cap |
 | `services/backup.py` | `export_full_backup()`, `export_user_backup()`, `restore_full_backup()` (version 2 with ID maps) |
@@ -256,7 +259,9 @@ Permission resolution is centralised in `services/access.py`. `get_project_permi
 | `stores/push.ts` | `isSupported`, `permission`, `isSubscribed`, `subscribe/unsubscribe` |
 | `stores/notifications.ts` | `count`, `items`, `fetchCount`, `fetchAll`, `markRead`, `markAll` |
 | `views/HomeView.vue` | Chat-first dashboard; 6 task sections (Overdue → Other); 8 recent notes; inline streaming response |
-| `views/ChatView.vue` | `/chat` — SSE streaming; context sidebar (Suggested/In Context); note picker; model selector; message queue; bulk delete |
+| `views/ChatView.vue` | `/chat` — SSE streaming; context sidebar (Suggested/In Context); note picker; scope chip (RAG project scope pill above input); message queue; bulk delete |
+| `views/CalendarView.vue` | `/calendar` — FullCalendar v6 month/week/day views; click to create event; click event to open EventSlideOver |
+| `components/EventSlideOver.vue` | Reusable slide-over for event create/edit/delete; used in ToolCallCard, HomeView, CalendarView |
 | `views/WorkspaceView.vue` | `/workspace/:id` — 3-panel (tasks/chat/notes); SSE tool-call watcher; conv persisted to localStorage |
 | `views/GraphView.vue` | `/graph` — D3 force-directed; tag/note/project-hub nodes; physics panel; peek panel |
 | `views/ProjectView.vue` | Kanban grouped by milestone; advance buttons; milestone management |
@@ -318,7 +323,7 @@ If a tool is detected, the intent's one-sentence `ack` field is streamed as the
 
 ### Tool Loop
 
-Multi-round tool loop (max 5 rounds). All implementations in `services/tools.py`; `execute_tool()` is the dispatcher.
+Multi-round tool loop (max 5 rounds). All implementations in `services/tools.py`; `execute_tool(user_id, tool_name, arguments, conv_id=None, workspace_project_id=None)` is the dispatcher. `conv_id` and `workspace_project_id` are threaded in from `run_generation()` so tools like `set_rag_scope` can write to the current conversation.
 
 **Duplicate protection on `create_note` / `create_task`:**
 1. Exact title match (case-insensitive) → hard block, redirect to `update_note`
@@ -352,11 +357,28 @@ Config: `IMAGE_CACHE_DIR` (default `/data/images`), `IMAGE_MAX_BYTES` (default 5
 
 ## RAG Pipeline
 
-1. `semantic_search_notes()` — cosine similarity via pgvector, threshold configurable per call.
+1. `semantic_search_notes()` — cosine similarity via pgvector, threshold configurable per call; accepts `orphan_only` and `project_id` scope flags.
 2. Notes ≥ 0.60 similarity auto-injected into system prompt (up to 3, 800 chars each).
 3. Notes 0.45–0.60 surfaced in chat sidebar as "Suggested" (user clicks to include).
 4. Explicitly included notes delivered full-body.
-5. Project-scoped RAG: `rag_project_id` param restricts all searches to a project's notes.
+5. `excluded_note_ids` prevents the current note from being injected as its own context.
-6. `excluded_note_ids` prevents the current note from being injected as its own context.
+
+### RAG Scope (three-value system)
+
+`conversations.rag_project_id` controls which notes are eligible for retrieval:
+
+| Value | Behaviour |
+|-------|-----------|
+| `NULL` (default) | Orphan notes only — notes with `project_id IS NULL` |
+| `-1` | All notes — opt-in to global search |
+| Positive int | That project's notes only |
+
+`build_context()` derives `orphan_only` + `effective_project_id` from this value before calling both the semantic and keyword search paths.
+
+**Scope tools** — Two LLM tools let the model discover and switch scope mid-conversation:
+- `search_projects` — SequenceMatcher scoring over title + description + `auto_summary`; returns top 5 matching projects.
+- `set_rag_scope` — persists the new `rag_project_id` to DB immediately; blocked in workspace view; causes the SSE `done` event to include `new_rag_scope` + `new_rag_scope_label` so the frontend chip updates reactively.
+
+**Project summaries** — `generate_project_summary()` calls Ollama (fire-and-forget) and stores the result in `projects.auto_summary`. Triggered on project update and note saves (debounced 1h). `backfill_project_summaries()` runs at startup.
 
 Embedding model: `nomic-embed-text` via Ollama. Backfill runs 30s after startup (background task).

docs/features.md

@@ -43,7 +43,7 @@ Tasks carry status (`todo` → `in_progress` → `done`), priority (`none`/`low`
 Full conversation history with SSE streaming. Features:
 - **RAG** — Semantically relevant notes (≥ 0.60 cosine similarity) auto-injected as context. Notes 0.45–0.60 shown in sidebar as "Suggested."
 - **Attach notes** — Paperclip icon to include specific notes in context.
-- **Project scope** — Restrict RAG to a single project's notes via the sidebar selector.
+- **RAG scope chip** — Pill above the input bar shows the current note scope. Click to switch: "Orphan notes only" (default — project notes stay out of general chat), any active project, or "All notes." Scope is persisted per conversation. The AI can also call `search_projects` and `set_rag_scope` mid-conversation to switch scope automatically; the chip pulses when this happens.
 - **Tool calls** — The assistant can create/update notes, tasks, projects, milestones, search the web, check weather, read RSS, query calendar events, and more. Tool calls display inline with confirm/deny for creates.
 - **Thinking mode** — Toggle extended reasoning for complex questions.
 - **Abort** — Stop button cancels in-flight generation.
@@ -70,9 +70,17 @@ Full conversation history with SSE streaming. Features:
 
 The assistant can search the web (SearXNG) and fetch pages, synthesising findings into notes. A lightweight `search_web` tool answers quick questions inline without saving. Requires `SEARXNG_URL` to be configured.
 
-## CalDAV Calendar
+## Calendar
 
-Connect an external CalDAV server (Nextcloud, Radicale, etc.) and manage calendar events via natural language. Tools: `create_event`, `list_events`, `search_events`, `update_event`, `delete_event`. Activated when user configures CalDAV credentials in Settings → Integrations.
+`/calendar` shows a full FullCalendar view (month, week, day). Click an empty slot to create an event; click an existing event to edit or delete it via a slide-over panel.
+
+**Internal events store** — Events are stored in the app database (`events` table), making them available without any external calendar. Fields: title, description, start/end datetime, all-day toggle, location, colour.
+
+**AI tools** — `create_event`, `list_events`, `search_events`, `update_event`, `delete_event` all operate on the internal store. Tool-call result cards in chat are clickable and open the same EventSlideOver for editing.
+
+**HomeView widget** — The dashboard shows today's and the next 7 days' events as clickable cards above the hero project.
+
+**CalDAV sync (optional)** — Connect an external CalDAV server (Nextcloud, Radicale, etc.) in Settings → Integrations. Events sync bidirectionally via a `caldav_uid` field.
 
 ## Sharing and Collaboration
 
@@ -119,7 +127,6 @@ Settings are tabbed:
 
 ## Roadmap
 
-- Calendar/timeline view for tasks with due dates
 - Email integration (read/send via IMAP/SMTP tools in chat)
 - Session invalidation on user deletion
 - Flutter push notifications (requires FCM/APNs — separate from web VAPID)