fix(server): preserve kanban/calendar fields in view manifest sync (#19946)

## Summary

The `fromViewManifestToUniversalFlatView` converter hardcoded five view
fields to `null` instead of reading them from the manifest:
- `mainGroupByFieldMetadataUniversalIdentifier`
- `kanbanAggregateOperation`
- `kanbanAggregateOperationFieldMetadataUniversalIdentifier`
- `calendarLayout`
- `calendarFieldMetadataUniversalIdentifier`

As a result **any** Kanban view in an app manifest is rejected by
`validateFlatViewCreation` with `"Kanban view must have a main group by
field"`, and any Calendar view would trip the `view.entity.ts` check
constraint requiring `calendarLayout` + `calendarFieldMetadataId` to be
non-null. Discovered while trying to install
[`twenty-crm-meeting-baas`](https://github.com/Meeting-BaaS/twenty-crm-meeting-baas)
which ships a Kanban view.

## Changes

- **Server converter**: read all five fields from the manifest (with `??
null` fallback).
- **`ViewManifest` type** (`twenty-shared`): add the five fields so SDK
users can set them type-safely.
- **Move `ViewCalendarLayout`** from `twenty-server` to `twenty-shared`
so the manifest type can reference it. Seven import sites updated; the
front-end imports via generated GraphQL types and is unaffected.
- **Unit tests**: extend
`from-view-manifest-to-universal-flat-view.util.spec.ts` with
preservation + null-default cases for both Kanban and Calendar (5 tests
total).
- **Regression coverage**: add a Kanban view
(`post-cards-by-status.view.ts`) to the `rich-app` fixture grouped by
the existing `status` SELECT field. The existing
`applications-install-delete-reinstall` e2e test now exercises the
Kanban path end-to-end — a future regression here would fail CI.

Note: `expected-manifest.ts` and the `views.length` assertion in
`manifest.tests.ts` were updated to reflect the new fixture view.

## Test plan

- [x] `nx test twenty-server --
from-view-manifest-to-universal-flat-view` → 5/5 pass
- [x] `nx typecheck twenty-shared` / `twenty-sdk` / `twenty-server` → no
new errors (one pre-existing unrelated error in
`admin-panel.module-factory.ts`)
- [x] `nx lint twenty-shared` / `twenty-sdk` → clean
- [x] Manual install of the Meeting BaaS app on a dev workspace succeeds
with the Kanban view after this fix
- [ ] CI: SDK e2e `applications-install-delete-reinstall` passes against
the new fixture view
- [ ] CI: integration test `calendar-field-deactivation-deletes-views`
still passes after the enum move

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>

packages/twenty-server/src/engine/metadata-modules/view/tools/__tests__/view-tools.factory.spec.ts

@@ -3,12 +3,11 @@ import { Test, type TestingModule } from '@nestjs/testing';
 import {
   FieldMetadataType,
   OrderByDirection,
+  ViewCalendarLayout,
   ViewType,
   ViewVisibility,
 } from 'twenty-shared/types';
 
-import { ViewCalendarLayout } from 'src/engine/metadata-modules/view/enums/view-calendar-layout.enum';
-
 import { WorkspaceManyOrAllFlatEntityMapsCacheService } from 'src/engine/metadata-modules/flat-entity/services/workspace-many-or-all-flat-entity-maps-cache.service';
 import { ViewFieldService } from 'src/engine/metadata-modules/view-field/services/view-field.service';
 import { ViewQueryParamsService } from 'src/engine/metadata-modules/view/services/view-query-params.service';

packages/twenty-server/src/engine/metadata-modules/view/tools/view-tools.factory.ts

@@ -4,6 +4,7 @@ import { type ToolSet } from 'ai';
 import {
   AggregateOperations,
   FieldMetadataType,
+  ViewCalendarLayout,
   ViewType,
   ViewVisibility,
 } from 'twenty-shared/types';
@@ -14,7 +15,6 @@ import { WorkspaceManyOrAllFlatEntityMapsCacheService } from 'src/engine/metadat
 import { buildObjectIdByNameMaps } from 'src/engine/metadata-modules/flat-object-metadata/utils/build-object-id-by-name-maps.util';
 import { ViewFieldService } from 'src/engine/metadata-modules/view-field/services/view-field.service';
 
-import { ViewCalendarLayout } from 'src/engine/metadata-modules/view/enums/view-calendar-layout.enum';
 import { ViewQueryParamsService } from 'src/engine/metadata-modules/view/services/view-query-params.service';
 import { ViewService } from 'src/engine/metadata-modules/view/services/view.service';
 import { WorkspaceMigrationBuilderException } from 'src/engine/workspace-manager/workspace-migration/exceptions/workspace-migration-builder-exception';