Introduce standalone page (#19675)

Add support for standalone pages: a new `PageLayout` type
(`STANDALONE_PAGE`) that can be rendered independently at
`/page/:pageLayoutId`, not tied to any record or object context.

- New `STANDALONE_PAGE` page layout type
- New `PAGE_LAYOUT` navigation menu item type: adds a `pageLayoutId`
foreign key to `NavigationMenuItemEntity`, allowing sidebar items to
link directly to standalone pages
- New `GLOBAL_OBJECT_CONTEXT` command menu availability type: separates
object-context-dependent commands (Create Record, Import, Export, See
Deleted, Create View, Hide Deleted) from truly global ones, so
standalone pages only show relevant commands
- Frontend routing & rendering: adds a `/page/:pageLayoutId` route with
its own page component, header, and command menu
- Widget rendering refactor
- Instance commands: two fast 1.22 migrations: `pageLayoutId` column +
`STANDALONE_PAGE` enum, and `GLOBAL_OBJECT_CONTEXT` availability type
enum
- Workspace command: backfills existing command menu items from `GLOBAL`
to `GLOBAL_OBJECT_CONTEXT` where appropriate
- Dev seeds: adds a sample "Star History" standalone page with an iframe
widget for local development

packages/twenty-server/src/engine/metadata-modules/flat-entity/constant/all-entity-properties-configuration-by-metadata-name.constant.ts

@@ -1169,6 +1169,11 @@ export const ALL_ENTITY_PROPERTIES_CONFIGURATION_BY_METADATA_NAME = {
       toStringify: false,
       universalProperty: 'targetObjectMetadataUniversalIdentifier',
     },
+    pageLayoutId: {
+      toCompare: false,
+      toStringify: false,
+      universalProperty: 'pageLayoutUniversalIdentifier',
+    },
   },
   permissionFlag: {
     flag: {

packages/twenty-server/src/engine/metadata-modules/flat-entity/constant/all-many-to-one-metadata-foreign-key.constant.ts

@@ -64,6 +64,9 @@ export const ALL_MANY_TO_ONE_METADATA_FOREIGN_KEY = {
     view: {
       foreignKey: 'viewId',
     },
+    pageLayout: {
+      foreignKey: 'pageLayoutId',
+    },
   },
   fieldMetadata: {
     object: {

packages/twenty-server/src/engine/metadata-modules/flat-entity/constant/all-many-to-one-metadata-relations.constant.ts

@@ -112,6 +112,13 @@ export const ALL_MANY_TO_ONE_METADATA_RELATIONS = {
       isNullable: true,
       universalForeignKey: 'viewUniversalIdentifier',
     },
+    pageLayout: {
+      metadataName: 'pageLayout',
+      foreignKey: 'pageLayoutId',
+      inverseOneToManyProperty: null,
+      isNullable: true,
+      universalForeignKey: 'pageLayoutUniversalIdentifier',
+    },
   },
   fieldMetadata: {
     object: {

packages/twenty-server/src/engine/metadata-modules/flat-entity/constant/all-metadata-required-metadata-for-validation.constant.ts

@@ -73,6 +73,7 @@ export const ALL_METADATA_REQUIRED_METADATA_FOR_VALIDATION = {
   navigationMenuItem: {
     objectMetadata: true,
     view: true,
+    pageLayout: true,
   },
   permissionFlag: {
     role: true,

packages/twenty-server/src/engine/metadata-modules/flat-entity/utils/__tests__/__snapshots__/get-metadata-related-metadata-names.util.spec.ts.snap

@@ -44,6 +44,7 @@ exports[`getMetadataRelatedMetadataNames should return related metadata names fo
   "objectMetadata",
   "navigationMenuItem",
   "view",
+  "pageLayout",
 ]
 `;
 

packages/twenty-server/src/engine/metadata-modules/flat-entity/utils/__tests__/__snapshots__/sort-metadata-names-children-first.util.spec.ts.snap

@@ -3,8 +3,8 @@
 exports[`sortMetadataNamesChildrenFirst should return metadata names sorted with children first (most manyToOne relations first) 1`] = `
 [
   "rowLevelPermissionPredicate",
-  "fieldPermission",
   "navigationMenuItem",
+  "fieldPermission",
   "viewField",
   "viewFilter",
   "commandMenuItem",