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Changeset 0.20.0 (#85)

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xcaliber
2026-03-01 12:40:15 +00:00
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CHANGELOG.md
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All notable changes to Chat Switchboard.
## [0.20.0] — 2026-03-01
### Added
- **Notifications Core (Phase 1)**: Persistent, user-targeted notification infrastructure with real-time WebSocket delivery. `notifications` table (Postgres + SQLite), `NotificationStore` with paginated queries, `Service.Notify()` / `NotifyMany()` for centralized creation and dispatch. Five API endpoints: list (paginated, filterable), unread count, mark read, mark all read, delete. Bell icon in header bar with unread count badge (capped at 9+). Notification dropdown (latest 10, grouped, click-to-navigate via `resource_type`/`resource_id`). Full notification panel registered with `PanelRegistry`. WebSocket push via `notification.new` event with toast for high-priority types (`kb.error`, `role.fallback`). Background cleanup goroutine (configurable retention, default 90 days). Initial sources: `role.fallback` (via EventBus subscription), `kb.ready`/`kb.error` (knowledge base processing), `grant.changed` (group membership).
- **@mention Parsing + Multi-model Routing (Phase 2)**: Channels support multiple AI models with @mention-based routing. `mentions.Parse()` extracts @mentions from message content, resolves against channel model roster (case-insensitive, longest-match-first, trailing punctuation tolerant). Completion handler fans out sequentially to mentioned model(s), producing one assistant response per target. Without @mention, default channel model responds (fully backward compatible). Channel model CRUD: 4 new endpoints for add/remove/update/list. Frontend: model pills in chat header, @mention autocomplete (CM6 `mentionCompletion` extension with roster-backed suggestions), model attribution labels on multi-model responses. Message `model_display` field for human-readable attribution. SSE streaming tagged with model info per response.
- **Email Transport + Notification Preferences (Phase 3)**: SMTP email delivery via `EmailTransport` supporting implicit TLS (port 465) and STARTTLS (port 587). Multipart MIME messages (HTML + plaintext) with branded templates using Go `html/template`. `notification_preferences` table with three-tier resolution: specific type → user wildcard `*` → system default (in_app=true, email=false). Three preference API endpoints (list, set with partial patch, delete). Admin SMTP configuration in settings (host, port, user, password, from address, TLS mode) with test email endpoint. User notification preferences UI in Settings → Notifications tab with per-type in-app/email checkboxes. Async email delivery (goroutine with 30s timeout, failures logged non-blocking).
- **Gin Release Mode**: Backend now automatically sets `gin.SetMode(gin.ReleaseMode)` when `ENVIRONMENT=production`, suppressing per-request access logs for health checks and reducing log noise. `GIN_MODE` env var also added to K8s backend deployment as explicit override.
### Fixed
- **Model preferences 500 on every page load**: `GET /api/v1/models/preferences` returned HTTP 500 due to `NULL` values in `user_model_settings.hidden` and `sort_order` columns failing Go `sql.Scan()` into non-pointer types. Root cause: the `Set` upsert passed `NULL` for unset patch fields, bypassing `DEFAULT false`/`DEFAULT 0` on INSERT. Fixed with `COALESCE` in both SELECT (read path) and INSERT VALUES (write path) for Postgres and SQLite. Includes data-fix SQL for existing NULL rows.
## [0.19.2] — 2026-02-28
### Added