feat(base): seed inline-embed bases with two extra text columns and one row

A freshly-created inline-embed used to render with only the primary
"Title" column and zero rows — visually it looks more like a broken
widget than a database, so users always had to do at least three
manual setup steps before the embed conveyed its purpose.

BaseService.create now accepts an optional `defaults` arg for
`extraTextProperties` and `defaultRows`; both extras are inserted in
the same transaction as the page/property/view so a half-built base
can never slip out. The inline-embed controller passes
{ extraTextProperties: 2, defaultRows: 1 } so the embed lands as
"Title + Text 1 + Text 2", with one empty row ready to type into.

Standalone base creation goes through the same code path with no
defaults, so its existing single-Title-column shape is unchanged.

apps/server/src/core/base/controllers/base.controller.ts

@@ -177,10 +177,20 @@ export class BaseController {
 
     await this.pageAccessService.validateCanEdit(parent, user);
 
-    return this.baseService.create(user.id, parent.workspaceId, {
-      spaceId: parent.spaceId,
-      parentPageId: dto.parentPageId,
-      name: 'Untitled',
-    });
+    // Inline embeds land mid-document and need to be visually meaningful
+    // on first paint — a single "Title" column with no rows looks broken.
+    // Seed two extra text columns and one empty row so the freshly-
+    // created base looks like a typical database (Title + Text 1 + Text 2,
+    // one ready-to-fill row).
+    return this.baseService.create(
+      user.id,
+      parent.workspaceId,
+      {
+        spaceId: parent.spaceId,
+        parentPageId: dto.parentPageId,
+        name: 'Untitled',
+      },
+      { extraTextProperties: 2, defaultRows: 1 },
+    );
   }
 }

apps/server/src/core/base/services/base.service.ts

@@ -7,6 +7,7 @@ import { KyselyDB } from '@docmost/db/types/kysely.types';
 import { executeTx } from '@docmost/db/utils';
 import { BaseRepo } from '@docmost/db/repos/base/base.repo';
 import { BasePropertyRepo } from '@docmost/db/repos/base/base-property.repo';
+import { BaseRowRepo } from '@docmost/db/repos/base/base-row.repo';
 import { BaseViewRepo } from '@docmost/db/repos/base/base-view.repo';
 import { PageService } from '../../page/services/page.service';
 import { PageRepo } from '@docmost/db/repos/page/page.repo';
@@ -22,12 +23,18 @@ export class BaseService {
     @InjectKysely() private readonly db: KyselyDB,
     private readonly baseRepo: BaseRepo,
     private readonly basePropertyRepo: BasePropertyRepo,
+    private readonly baseRowRepo: BaseRowRepo,
     private readonly baseViewRepo: BaseViewRepo,
     private readonly pageService: PageService,
     private readonly pageRepo: PageRepo,
   ) {}
 
-  async create(userId: string, workspaceId: string, dto: CreateBaseDto) {
+  async create(
+    userId: string,
+    workspaceId: string,
+    dto: CreateBaseDto,
+    defaults: { extraTextProperties?: number; defaultRows?: number } = {},
+  ) {
     return executeTx(this.db, async (trx) => {
       const page = await this.pageService.create(
         userId,
@@ -56,6 +63,28 @@ export class BaseService {
         trx,
       );
 
+      // Extra default text properties (used by the inline-embed flow so
+      // a freshly-inserted database renders with a few visible columns
+      // instead of a single "Title" lane). Positions are chained off
+      // each other so they keep the requested order.
+      let lastPropertyPosition = firstPosition;
+      const extraTextProperties = defaults.extraTextProperties ?? 0;
+      for (let i = 0; i < extraTextProperties; i++) {
+        const next = generateJitteredKeyBetween(lastPropertyPosition, null);
+        await this.basePropertyRepo.insertProperty(
+          {
+            pageId: page.id,
+            name: `Text ${i + 1}`,
+            type: BasePropertyType.TEXT,
+            position: next,
+            isPrimary: false,
+            workspaceId,
+          },
+          trx,
+        );
+        lastPropertyPosition = next;
+      }
+
       await this.baseViewRepo.insertView(
         {
           pageId: page.id,
@@ -69,6 +98,26 @@ export class BaseService {
         { trx },
       );
 
+      // Default empty rows. Same flow rationale as extra properties —
+      // the inline-embed flow asks for one so the freshly-inserted
+      // database is interactive on first paint.
+      let lastRowPosition: string | null = null;
+      const defaultRows = defaults.defaultRows ?? 0;
+      for (let i = 0; i < defaultRows; i++) {
+        const next = generateJitteredKeyBetween(lastRowPosition, null);
+        await this.baseRowRepo.insertRow(
+          {
+            pageId: page.id,
+            workspaceId,
+            position: next,
+            cells: {},
+            creatorId: userId,
+          },
+          { trx },
+        );
+        lastRowPosition = next;
+      }
+
       return this.baseRepo.findById(page.id, {
         includeProperties: true,
         includeViews: true,