Fix find tool filters by mapping many-to-one relations to fieldId (#15716)

**Root Cause**  
Many-to-one relation filters were being exposed under the relation name
(e.g., `company`) instead of the corresponding foreign-key attribute
(e.g., `companyId`).

**Change**  
- Detect many-to-one relation metadata and remap those filter keys to
`<fieldName>Id`.
- Removed some unused code unrelated to this fix.

packages/twenty-front/src/modules/ai/utils/hasStructuredStreamData.ts

@@ -1,14 +0,0 @@
-export const hasStructuredStreamData = (data: string): boolean => {
-  if (!data.includes('\n')) {
-    return false;
-  }
-
-  return data.split('\n').some((line) => {
-    try {
-      JSON.parse(line);
-      return true;
-    } catch {
-      return false;
-    }
-  });
-};

packages/twenty-server/src/engine/core-modules/ai/controllers/ai.controller.ts

@@ -20,7 +20,7 @@ import { WorkspaceEntity } from 'src/engine/core-modules/workspace/workspace.ent
 import { AuthWorkspace } from 'src/engine/decorators/auth/auth-workspace.decorator';
 import { WorkspaceAuthGuard } from 'src/engine/guards/workspace-auth.guard';
 
-export interface ChatRequest {
+interface ChatRequest {
   messages: ModelMessage[];
   temperature?: number;
   maxOutputTokens?: number;

packages/twenty-server/src/engine/core-modules/record-crud/zod-schemas/find-tool.zod-schema.ts

@@ -1,10 +1,15 @@
-import { type RestrictedFieldsPermissions } from 'twenty-shared/types';
+import {
+  FieldMetadataType,
+  RelationType,
+  type RestrictedFieldsPermissions,
+} from 'twenty-shared/types';
 import { z } from 'zod';
 
 import { generateFieldFilterZodSchema } from 'src/engine/core-modules/record-crud/zod-schemas/field-filters.zod-schema';
 import { ObjectRecordOrderBySchema } from 'src/engine/core-modules/record-crud/zod-schemas/order-by.zod-schema';
 import { shouldExcludeFieldFromAgentToolSchema } from 'src/engine/metadata-modules/field-metadata/utils/should-exclude-field-from-agent-tool-schema.util';
 import { type ObjectMetadataEntity } from 'src/engine/metadata-modules/object-metadata/object-metadata.entity';
+import { isFieldMetadataEntityOfType } from 'src/engine/utils/is-field-metadata-of-type.util';
 
 export const generateFindToolInputSchema = (
   objectMetadata: ObjectMetadataEntity,
@@ -23,9 +28,16 @@ export const generateFindToolInputSchema = (
 
     const filterSchema = generateFieldFilterZodSchema(field);
 
-    if (filterSchema) {
-      filterShape[field.name] = filterSchema;
+    if (!filterSchema) {
+      return;
     }
+
+    const isManyToOneRelationField =
+      isFieldMetadataEntityOfType(field, FieldMetadataType.RELATION) &&
+      field.settings?.relationType === RelationType.MANY_TO_ONE;
+
+    filterShape[isManyToOneRelationField ? `${field.name}Id` : field.name] =
+      filterSchema;
   });
 
   return z.object({

packages/twenty-server/src/engine/metadata-modules/flat-agent/utils/transform-standard-agent-definition-to-flat-agent.util.ts

@@ -7,11 +7,8 @@ export const transformStandardAgentDefinitionToFlatAgent = (
   standardAgentDefinition: StandardAgentDefinition,
   workspaceId: string,
 ): FlatAgent => {
-  const {
-    createHandoffFromDefaultAgent: _createHandoffFromDefaultAgent,
-    standardRoleId: _standardRoleId,
-    ...agentData
-  } = standardAgentDefinition;
+  const { standardRoleId: _standardRoleId, ...agentData } =
+    standardAgentDefinition;
 
   return {
     ...agentData,

packages/twenty-server/src/engine/workspace-manager/workspace-sync-metadata/standard-agents/agents/data-manipulator-agent.ts

@@ -9,7 +9,6 @@ export const DATA_MANIPULATOR_AGENT: StandardAgentDefinition = {
     'AI agent specialized in creating, updating, and managing data across all objects',
   icon: 'IconEdit',
   applicationId: null,
-  createHandoffFromDefaultAgent: true,
   prompt: `You are a Data Manipulator Agent specialized in helping users create, update, and manage data in Twenty.
 
 Your capabilities include:

packages/twenty-server/src/engine/workspace-manager/workspace-sync-metadata/standard-agents/agents/data-navigator-agent.ts

@@ -9,7 +9,6 @@ export const DATA_NAVIGATOR_AGENT: StandardAgentDefinition = {
     'AI agent specialized in exploring and reading data across all objects',
   icon: 'IconSearch',
   applicationId: null,
-  createHandoffFromDefaultAgent: true,
   prompt: `You are a Data Navigator Agent specialized in helping users explore and understand their data in Twenty.
 
 Your capabilities include:

packages/twenty-server/src/engine/workspace-manager/workspace-sync-metadata/standard-agents/agents/helper-agent.ts

@@ -8,7 +8,6 @@ export const HELPER_AGENT: StandardAgentDefinition = {
     'AI agent specialized in helping users learn how to use Twenty CRM',
   icon: 'IconHelp',
   applicationId: null,
-  createHandoffFromDefaultAgent: true,
   prompt: `You are a Helper Agent specialized in assisting users with questions about how to use Twenty CRM.
 
 Your capabilities include:

packages/twenty-server/src/engine/workspace-manager/workspace-sync-metadata/standard-agents/agents/workflow-builder-agent.ts

@@ -8,7 +8,6 @@ export const WORKFLOW_BUILDER_AGENT: StandardAgentDefinition = {
   description: 'AI agent specialized in creating and managing workflows',
   icon: 'IconSettingsAutomation',
   applicationId: null,
-  createHandoffFromDefaultAgent: true,
   prompt: `You are a Workflow Builder Agent specialized in helping users create, modify, and manage workflows in Twenty.
 
 Your capabilities include:

packages/twenty-server/src/engine/workspace-manager/workspace-sync-metadata/standard-agents/types/standard-agent-definition.interface.ts

@@ -6,6 +6,4 @@ export type StandardAgentDefinition = Omit<
 > & {
   standardId: string;
   standardRoleId?: string;
-  // If true, creates a handoff from the default agent to this agent
-  createHandoffFromDefaultAgent?: boolean;
 };