chore: remove citation feature flag (#12567)

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

- **New Features**
  - Footnote definitions and "Sources" headings are now always included in notes, without requiring a feature flag.
  - Enhanced footnote-related content with additional citation-style blocks such as bookmarks, embedded documents, and attachments.

- **Chores**
  - Removed the citation feature flag and its related configuration, logic, and translations from the application.

- **Documentation**
  - Updated localization files to remove entries related to the citation experimental feature.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

blocksuite/affine/all/src/__tests__/adapters/markdown.unit.spec.ts

@@ -4393,6 +4393,61 @@ hhh
           },
           children: [],
         },
+        {
+          type: 'block',
+          id: 'matchesReplaceMap[2]',
+          flavour: 'affine:paragraph',
+          props: {
+            type: 'h6',
+            text: {
+              '$blocksuite:internal:text$': true,
+              delta: [
+                {
+                  insert: 'Sources',
+                },
+              ],
+            },
+            collapsed: true,
+          },
+          children: [],
+        },
+        {
+          type: 'block',
+          id: 'matchesReplaceMap[3]',
+          flavour: 'affine:bookmark',
+          props: {
+            style: 'citation',
+            url,
+            title,
+            description,
+            icon: favicon,
+            footnoteIdentifier: '1',
+          },
+          children: [],
+        },
+        {
+          type: 'block',
+          id: 'matchesReplaceMap[4]',
+          flavour: 'affine:embed-linked-doc',
+          props: {
+            style: 'citation',
+            pageId: 'deadbeef',
+            footnoteIdentifier: '2',
+          },
+          children: [],
+        },
+        {
+          type: 'block',
+          id: 'matchesReplaceMap[5]',
+          flavour: 'affine:attachment',
+          props: {
+            name: 'test.txt',
+            sourceId: 'abcdefg',
+            footnoteIdentifier: '3',
+            style: 'citation',
+          },
+          children: [],
+        },
       ],
     };
 
@@ -4469,6 +4524,38 @@ hhh
             },
             children: [],
           },
+          {
+            type: 'block',
+            id: 'matchesReplaceMap[2]',
+            flavour: 'affine:paragraph',
+            props: {
+              type: 'h6',
+              text: {
+                '$blocksuite:internal:text$': true,
+                delta: [
+                  {
+                    insert: 'Sources',
+                  },
+                ],
+              },
+              collapsed: true,
+            },
+            children: [],
+          },
+          {
+            type: 'block',
+            id: 'matchesReplaceMap[3]',
+            flavour: 'affine:bookmark',
+            props: {
+              style: 'citation',
+              url,
+              title,
+              description,
+              icon: favicon,
+              footnoteIdentifier: '1',
+            },
+            children: [],
+          },
         ],
       };
 

blocksuite/affine/blocks/attachment/src/adapters/markdown.ts

@@ -10,7 +10,6 @@ import {
   isFootnoteDefinitionNode,
   type MarkdownAST,
 } from '@blocksuite/affine-shared/adapters';
-import { FeatureFlagService } from '@blocksuite/affine-shared/services';
 import { nanoid } from '@blocksuite/store';
 
 const isAttachmentFootnoteDefinitionNode = (node: MarkdownAST) => {
@@ -36,15 +35,7 @@ export const attachmentBlockMarkdownAdapterMatcher: BlockMarkdownAdapterMatcher
     fromMatch: o => o.node.flavour === AttachmentBlockSchema.model.flavour,
     toBlockSnapshot: {
       enter: (o, context) => {
-        const { provider } = context;
-        let enableCitation = false;
-        try {
-          const featureFlagService = provider?.get(FeatureFlagService);
-          enableCitation = !!featureFlagService?.getFlag('enable_citation');
-        } catch {
-          enableCitation = false;
-        }
-        if (!isFootnoteDefinitionNode(o.node) || !enableCitation) {
+        if (!isFootnoteDefinitionNode(o.node)) {
           return;
         }
 
@@ -73,6 +64,7 @@ export const attachmentBlockMarkdownAdapterMatcher: BlockMarkdownAdapterMatcher
                   name: fileName,
                   sourceId: blobId,
                   footnoteIdentifier,
+                  style: 'citation',
                 },
                 children: [],
               },

blocksuite/affine/blocks/bookmark/src/adapters/markdown/markdown.ts

@@ -10,7 +10,6 @@ import {
   isFootnoteDefinitionNode,
   type MarkdownAST,
 } from '@blocksuite/affine-shared/adapters';
-import { FeatureFlagService } from '@blocksuite/affine-shared/services';
 import { nanoid } from '@blocksuite/store';
 
 const isUrlFootnoteDefinitionNode = (node: MarkdownAST) => {
@@ -33,15 +32,7 @@ export const bookmarkBlockMarkdownAdapterMatcher =
     toMatch: o => isUrlFootnoteDefinitionNode(o.node),
     toBlockSnapshot: {
       enter: (o, context) => {
-        const { provider } = context;
-        let enableCitation = false;
-        try {
-          const featureFlagService = provider?.get(FeatureFlagService);
-          enableCitation = !!featureFlagService?.getFlag('enable_citation');
-        } catch {
-          enableCitation = false;
-        }
-        if (!isFootnoteDefinitionNode(o.node) || !enableCitation) {
+        if (!isFootnoteDefinitionNode(o.node)) {
           return;
         }
 

blocksuite/affine/blocks/embed-doc/src/embed-linked-doc-block/adapters/markdown.ts

@@ -11,7 +11,6 @@ import {
   isFootnoteDefinitionNode,
   type MarkdownAST,
 } from '@blocksuite/affine-shared/adapters';
-import { FeatureFlagService } from '@blocksuite/affine-shared/services';
 import { nanoid } from '@blocksuite/store';
 
 const isLinkedDocFootnoteDefinitionNode = (node: MarkdownAST) => {
@@ -36,15 +35,7 @@ export const embedLinkedDocBlockMarkdownAdapterMatcher: BlockMarkdownAdapterMatc
     fromMatch: o => o.node.flavour === EmbedLinkedDocBlockSchema.model.flavour,
     toBlockSnapshot: {
       enter: (o, context) => {
-        const { provider } = context;
-        let enableCitation = false;
-        try {
-          const featureFlagService = provider?.get(FeatureFlagService);
-          enableCitation = !!featureFlagService?.getFlag('enable_citation');
-        } catch {
-          enableCitation = false;
-        }
-        if (!isFootnoteDefinitionNode(o.node) || !enableCitation) {
+        if (!isFootnoteDefinitionNode(o.node)) {
           return;
         }
 

blocksuite/affine/blocks/note/src/adapters/markdown.ts

@@ -6,7 +6,6 @@ import {
   isFootnoteDefinitionNode,
   type MarkdownAST,
 } from '@blocksuite/affine-shared/adapters';
-import { FeatureFlagService } from '@blocksuite/affine-shared/services';
 import type { Root } from 'mdast';
 
 const isRootNode = (node: MarkdownAST): node is Root => node.type === 'root';
@@ -66,34 +65,19 @@ const createNoteBlockMarkdownAdapterMatcher = (
         }
       });
 
-      const { provider } = context;
-      let enableCitation = false;
-      try {
-        const featureFlagService = provider?.get(FeatureFlagService);
-        enableCitation = !!featureFlagService?.getFlag('enable_citation');
-      } catch {
-        enableCitation = false;
-      }
-      if (enableCitation) {
-        // if there are footnoteDefinition nodes, add a heading node to the noteAst before the first footnoteDefinition node
-        const footnoteDefinitionIndex = noteAst.children.findIndex(child =>
-          isFootnoteDefinitionNode(child)
-        );
-        if (footnoteDefinitionIndex !== -1) {
-          noteAst.children.splice(footnoteDefinitionIndex, 0, {
-            type: 'heading',
-            depth: 6,
-            data: {
-              collapsed: true,
-            },
-            children: [{ type: 'text', value: 'Sources' }],
-          });
-        }
-      } else {
-        // Remove the footnoteDefinition node from the noteAst
-        noteAst.children = noteAst.children.filter(
-          child => !isFootnoteDefinitionNode(child)
-        );
+      // if there are footnoteDefinition nodes, add a heading node to the noteAst before the first footnoteDefinition node
+      const footnoteDefinitionIndex = noteAst.children.findIndex(child =>
+        isFootnoteDefinitionNode(child)
+      );
+      if (footnoteDefinitionIndex !== -1) {
+        noteAst.children.splice(footnoteDefinitionIndex, 0, {
+          type: 'heading',
+          depth: 6,
+          data: {
+            collapsed: true,
+          },
+          children: [{ type: 'text', value: 'Sources' }],
+        });
       }
     },
   },

blocksuite/affine/shared/src/services/feature-flag-service.ts

@@ -21,7 +21,6 @@ export interface BlockSuiteFlags {
   enable_table_virtual_scroll: boolean;
   enable_embed_doc_with_alias: boolean;
   enable_turbo_renderer: boolean;
-  enable_citation: boolean;
   enable_link_preview_cache: boolean;
   enable_dom_renderer: boolean;
 }
@@ -49,7 +48,6 @@ export class FeatureFlagService extends StoreExtension {
     enable_table_virtual_scroll: false,
     enable_embed_doc_with_alias: false,
     enable_turbo_renderer: false,
-    enable_citation: false,
     enable_link_preview_cache: false,
     enable_dom_renderer: false,
   });