feat(nbstore): add more data to indexer (#12815)

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

- **Bug Fixes**
- Improved display of image and attachment blocks by ensuring image
captions are shown as content for images, while attachment names remain
as content for attachments.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->


#### PR Dependency Tree


* **PR #12815** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

---------

Co-authored-by: fengmk2 <fengmk2@gmail.com>

packages/backend/server/src/core/utils/__tests__/__snapshots__/blocksute.spec.ts.md

@@ -605,6 +605,7 @@ Generated by [AVA](https://avajs.dev).
             'BFZk3c2ERp-sliRvA7MQ_p3NdkdCLt2Ze0DQ9i21dpA=',
           ],
           blockId: 'lcZphIJe63',
+          content: '',
           docId: 'doc-0',
           flavour: 'affine:image',
           parentBlockId: '6x7ALjUDjj',
@@ -619,6 +620,7 @@ Generated by [AVA](https://avajs.dev).
             'HWvCItS78DzPGbwcuaGcfkpVDUvL98IvH5SIK8-AcL8=',
           ],
           blockId: 'JlgVJdWU12',
+          content: '',
           docId: 'doc-0',
           flavour: 'affine:image',
           parentBlockId: '6x7ALjUDjj',
@@ -633,6 +635,7 @@ Generated by [AVA](https://avajs.dev).
             'ZRKpsBoC88qEMmeiXKXqywfA1rLvWoLa5rpEh9x9Oj0=',
           ],
           blockId: 'lht7AqBqnF',
+          content: '',
           docId: 'doc-0',
           flavour: 'affine:image',
           parentBlockId: '6x7ALjUDjj',
@@ -1236,6 +1239,7 @@ Generated by [AVA](https://avajs.dev).
             'BFZk3c2ERp-sliRvA7MQ_p3NdkdCLt2Ze0DQ9i21dpA=',
           ],
           blockId: 'lcZphIJe63',
+          content: '',
           docId: 'doc-0',
           flavour: 'affine:image',
           parentBlockId: '6x7ALjUDjj',
@@ -1250,6 +1254,7 @@ Generated by [AVA](https://avajs.dev).
             'HWvCItS78DzPGbwcuaGcfkpVDUvL98IvH5SIK8-AcL8=',
           ],
           blockId: 'JlgVJdWU12',
+          content: '',
           docId: 'doc-0',
           flavour: 'affine:image',
           parentBlockId: '6x7ALjUDjj',
@@ -1264,6 +1269,7 @@ Generated by [AVA](https://avajs.dev).
             'ZRKpsBoC88qEMmeiXKXqywfA1rLvWoLa5rpEh9x9Oj0=',
           ],
           blockId: 'lht7AqBqnF',
+          content: '',
           docId: 'doc-0',
           flavour: 'affine:image',
           parentBlockId: '6x7ALjUDjj',

packages/common/reader/__tests__/__snapshots__/reader.spec.ts.snap

@@ -1673,6 +1673,7 @@ exports[`should read doc blocks work 1`] = `
         "BFZk3c2ERp-sliRvA7MQ_p3NdkdCLt2Ze0DQ9i21dpA=",
       ],
       "blockId": "lcZphIJe63",
+      "content": "",
       "docId": "test-doc",
       "flavour": "affine:image",
       "parentBlockId": "6x7ALjUDjj",
@@ -1702,6 +1703,7 @@ exports[`should read doc blocks work 1`] = `
         "HWvCItS78DzPGbwcuaGcfkpVDUvL98IvH5SIK8-AcL8=",
       ],
       "blockId": "JlgVJdWU12",
+      "content": "",
       "docId": "test-doc",
       "flavour": "affine:image",
       "parentBlockId": "6x7ALjUDjj",
@@ -1731,6 +1733,7 @@ exports[`should read doc blocks work 1`] = `
         "ZRKpsBoC88qEMmeiXKXqywfA1rLvWoLa5rpEh9x9Oj0=",
       ],
       "blockId": "lht7AqBqnF",
+      "content": "",
       "docId": "test-doc",
       "flavour": "affine:image",
       "parentBlockId": "6x7ALjUDjj",
@@ -3361,6 +3364,7 @@ exports[`should read doc blocks work without root doc 1`] = `
         "BFZk3c2ERp-sliRvA7MQ_p3NdkdCLt2Ze0DQ9i21dpA=",
       ],
       "blockId": "lcZphIJe63",
+      "content": "",
       "docId": "test-doc",
       "flavour": "affine:image",
       "parentBlockId": "6x7ALjUDjj",
@@ -3390,6 +3394,7 @@ exports[`should read doc blocks work without root doc 1`] = `
         "HWvCItS78DzPGbwcuaGcfkpVDUvL98IvH5SIK8-AcL8=",
       ],
       "blockId": "JlgVJdWU12",
+      "content": "",
       "docId": "test-doc",
       "flavour": "affine:image",
       "parentBlockId": "6x7ALjUDjj",
@@ -3419,6 +3424,7 @@ exports[`should read doc blocks work without root doc 1`] = `
         "ZRKpsBoC88qEMmeiXKXqywfA1rLvWoLa5rpEh9x9Oj0=",
       ],
       "blockId": "lht7AqBqnF",
+      "content": "",
       "docId": "test-doc",
       "flavour": "affine:image",
       "parentBlockId": "6x7ALjUDjj",

packages/common/reader/src/reader.ts

@@ -648,12 +648,24 @@ export async function readAllBlocksFromDoc({
           parentBlockId,
         });
       }
-    } else if (flavour === 'affine:attachment' || flavour === 'affine:image') {
+    } else if (flavour === 'affine:attachment') {
       const blobId = block.get('prop:sourceId');
       if (typeof blobId === 'string') {
         blockDocuments.push({
           ...commonBlockProps,
           blob: [blobId],
+          content: block.get('prop:name')?.toString() ?? '',
+          parentFlavour,
+          parentBlockId,
+        });
+      }
+    } else if (flavour === 'affine:image') {
+      const blobId = block.get('prop:sourceId');
+      if (typeof blobId === 'string') {
+        blockDocuments.push({
+          ...commonBlockProps,
+          blob: [blobId],
+          content: block.get('prop:caption')?.toString() ?? '',
           parentFlavour,
           parentBlockId,
         });