fix(mongodb): use dedicated count for legacy collections

apps/desktop/src/lib/backend/api.ts

@@ -432,6 +432,7 @@ export const mongoDropDatabase = forward("mongoDropDatabase");
 export const mongoDropCollection = forward("mongoDropCollection");
 export const documentFindDocuments = forward("documentFindDocuments");
 export const mongoFindDocuments = forward("mongoFindDocuments");
+export const mongoCountDocuments = forward("mongoCountDocuments");
 export const mongoServerVersion = forward("mongoServerVersion");
 export const mongoAggregateDocuments = forward("mongoAggregateDocuments");
 export const mongoCollectionStats = forward("mongoCollectionStats");

apps/desktop/src/lib/backend/http.ts

@@ -2009,6 +2009,10 @@ export async function documentFindDocuments(connectionId: string, database: stri
   return post("/api/document-store/find-documents", { connectionId, database, collection, skip, limit, filter, projection, sort, executionId });
 }
 
+export async function mongoCountDocuments(connectionId: string, database: string, collection: string, filter?: string, mode?: "accurate" | "legacy", executionId?: string): Promise<number> {
+  return post("/api/mongo/count-documents", { connectionId, database, collection, filter, mode, executionId });
+}
+
 export async function documentListGridFsFiles(connectionId: string, database: string, bucket: string, filter?: string, sort?: string): Promise<MongoGridFsFileInfo[]> {
   return post("/api/document-store/list-gridfs-files", { connectionId, database, bucket, filter, sort });
 }

apps/desktop/src/lib/backend/tauri.ts

@@ -1792,6 +1792,10 @@ export async function documentFindDocuments(connectionId: string, database: stri
   return invoke("document_find_documents", { connectionId, database, collection, skip, limit, filter, projection, sort, executionId });
 }
 
+export async function mongoCountDocuments(connectionId: string, database: string, collection: string, filter?: string, mode?: "accurate" | "legacy", executionId?: string): Promise<number> {
+  return invoke("mongo_count_documents", { connectionId, database, collection, filter, mode, executionId });
+}
+
 export async function documentListGridFsFiles(connectionId: string, database: string, bucket: string, filter?: string, sort?: string): Promise<MongoGridFsFileInfo[]> {
   return invoke("document_list_gridfs_files", { connectionId, database, bucket, filter, sort });
 }

apps/desktop/src/lib/mongo/mongoShellCommand.ts

@@ -12,6 +12,7 @@ export interface MongoFindCommand {
 export interface MongoCountDocumentsCommand {
   collection: string;
   filter: string;
+  mode: "accurate" | "legacy";
 }
 
 export interface MongoAggregateCommand {
@@ -145,8 +146,6 @@ export function applyMongoFindSort(input: string, column: string, direction: "as
 
 export function parseMongoCountDocumentsCommand(input: string): MongoCountDocumentsCommand | null {
   const source = input.trim().replace(/;$/, "").trim();
-  // Accept deprecated Mongo shell count helpers for old server workflows, but
-  // keep DBX's internal execution mapped to the countDocuments result shape.
   return parseCollectionCountCommand(source, "countDocuments") ?? parseCollectionCountCommand(source, "count") ?? parseFindCountCommand(source);
 }
 
@@ -166,6 +165,7 @@ function parseCollectionCountCommand(source: string, method: "countDocuments" |
   return {
     collection: target.collection,
     filter,
+    mode: method === "countDocuments" ? "accurate" : "legacy",
   };
 }
 
@@ -188,6 +188,7 @@ function parseFindCountCommand(source: string): MongoCountDocumentsCommand | nul
   return {
     collection: target.collection,
     filter,
+    mode: "legacy",
   };
 }