Add email thread widget and message thread record page layout (#19351)

## Summary
- Move email thread display from side panel to a dedicated record page
with a new `EMAIL_THREAD` widget type
- Add message thread as a standard object with page layout, subject
field, and backfill command
- Add reply-to-email command menu item for message thread records
- Remove old side panel message thread components in favor of the new
widget-based approach

## Type fixes
- Add `EMAIL_THREAD` to `WidgetConfigurationType`, `WidgetType`, and all
configuration/validator maps
- Create `EmailThreadConfigurationDTO` and shared
`EmailThreadConfiguration` type
- Register EMAIL_THREAD in widget type validators, configuration
resolvers, and standard widget mappings

## Test plan
- [ ] Verify message thread record pages render with the email thread
widget
- [ ] Verify email thread preview navigates to the record page instead
of opening side panel
- [ ] Verify reply-to-email command appears for message thread records
- [ ] Verify typecheck passes for both twenty-front and twenty-server
- [ ] Run existing test suites to check for regressions

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

packages/twenty-server/src/database/commands/upgrade-version-command/1-21/1-21-backfill-message-thread-subject.command.ts

@@ -0,0 +1,73 @@
+import { Command } from 'nest-commander';
+
+import { ActiveOrSuspendedWorkspaceCommandRunner } from 'src/database/commands/command-runners/active-or-suspended-workspace.command-runner';
+import { WorkspaceIteratorService } from 'src/database/commands/command-runners/workspace-iterator.service';
+import { type RunOnWorkspaceArgs } from 'src/database/commands/command-runners/workspace.command-runner';
+import { getWorkspaceSchemaName } from 'src/engine/workspace-datasource/utils/get-workspace-schema-name.util';
+
+@Command({
+  name: 'upgrade:1-21:backfill-message-thread-subject',
+  description:
+    'Backfill messageThread.subject from the most recently received message in each thread',
+})
+export class BackfillMessageThreadSubjectCommand extends ActiveOrSuspendedWorkspaceCommandRunner {
+  constructor(
+    protected readonly workspaceIteratorService: WorkspaceIteratorService,
+  ) {
+    super(workspaceIteratorService);
+  }
+
+  override async runOnWorkspace({
+    workspaceId,
+    dataSource,
+    options,
+  }: RunOnWorkspaceArgs): Promise<void> {
+    if (!dataSource) {
+      this.logger.log(`No data source for workspace ${workspaceId}, skipping`);
+
+      return;
+    }
+
+    const schemaName = getWorkspaceSchemaName(workspaceId);
+
+    if (options.dryRun) {
+      this.logger.log(
+        `[DRY RUN] Would backfill messageThread.subject for workspace ${workspaceId}`,
+      );
+
+      return;
+    }
+
+    const columnExists = await dataSource.query(
+      `SELECT 1 FROM information_schema.columns
+       WHERE table_schema = $1
+         AND table_name = 'messageThread'
+         AND column_name = 'subject'`,
+      [schemaName],
+    );
+
+    if (columnExists.length === 0) {
+      this.logger.log(
+        `Column "subject" does not exist yet on messageThread for workspace ${workspaceId}, skipping (will be created by sync-metadata)`,
+      );
+
+      return;
+    }
+
+    const result = await dataSource.query(
+      `UPDATE "${schemaName}"."messageThread" mt
+       SET "subject" = sub.subject
+       FROM (
+         SELECT DISTINCT ON ("messageThreadId") "messageThreadId", "subject"
+         FROM "${schemaName}"."message"
+         ORDER BY "messageThreadId", "receivedAt" DESC NULLS LAST
+       ) sub
+       WHERE mt.id = sub."messageThreadId"
+         AND mt."subject" IS NULL`,
+    );
+
+    this.logger.log(
+      `Backfilled subject for ${result?.[1] ?? 0} message threads in workspace ${workspaceId}`,
+    );
+  }
+}

packages/twenty-server/src/database/commands/upgrade-version-command/1-21/1-21-upgrade-version-command.module.ts

@@ -2,6 +2,7 @@ import { Module } from '@nestjs/common';
 import { TypeOrmModule } from '@nestjs/typeorm';
 
 import { WorkspaceIteratorModule } from 'src/database/commands/command-runners/workspace-iterator.module';
+import { BackfillMessageThreadSubjectCommand } from 'src/database/commands/upgrade-version-command/1-21/1-21-backfill-message-thread-subject.command';
 import { AddGlobalKeyValuePairUniqueIndexCommand } from 'src/database/commands/upgrade-version-command/1-21/1-21-add-global-key-value-pair-unique-index.command';
 import { BackfillDatasourceToWorkspaceCommand } from 'src/database/commands/upgrade-version-command/1-21/1-21-backfill-datasource-to-workspace.command';
 import { BackfillPageLayoutsAndFieldsWidgetViewFieldsCommand } from 'src/database/commands/upgrade-version-command/1-21/1-21-backfill-page-layouts-and-fields-widget-view-fields.command';
@@ -39,6 +40,7 @@ import { WorkspaceMigrationModule } from 'src/engine/workspace-manager/workspace
   providers: [
     AddGlobalKeyValuePairUniqueIndexCommand,
     BackfillDatasourceToWorkspaceCommand,
+    BackfillMessageThreadSubjectCommand,
     BackfillPageLayoutsAndFieldsWidgetViewFieldsCommand,
     DeduplicateEngineCommandsCommand,
     FixSelectAllCommandMenuItemsCommand,
@@ -50,6 +52,7 @@ import { WorkspaceMigrationModule } from 'src/engine/workspace-manager/workspace
   exports: [
     AddGlobalKeyValuePairUniqueIndexCommand,
     BackfillDatasourceToWorkspaceCommand,
+    BackfillMessageThreadSubjectCommand,
     BackfillPageLayoutsAndFieldsWidgetViewFieldsCommand,
     DeduplicateEngineCommandsCommand,
     FixSelectAllCommandMenuItemsCommand,

packages/twenty-server/src/database/commands/upgrade-version-command/upgrade.command.ts

@@ -28,6 +28,7 @@ import { SeedCliApplicationRegistrationCommand } from 'src/database/commands/upg
 import { UpdateStandardIndexViewNamesCommand } from 'src/database/commands/upgrade-version-command/1-20/1-20-update-standard-index-view-names.command';
 import { AddGlobalKeyValuePairUniqueIndexCommand } from 'src/database/commands/upgrade-version-command/1-21/1-21-add-global-key-value-pair-unique-index.command';
 import { BackfillDatasourceToWorkspaceCommand } from 'src/database/commands/upgrade-version-command/1-21/1-21-backfill-datasource-to-workspace.command';
+import { BackfillMessageThreadSubjectCommand } from 'src/database/commands/upgrade-version-command/1-21/1-21-backfill-message-thread-subject.command';
 import { BackfillPageLayoutsAndFieldsWidgetViewFieldsCommand } from 'src/database/commands/upgrade-version-command/1-21/1-21-backfill-page-layouts-and-fields-widget-view-fields.command';
 import { DeduplicateEngineCommandsCommand } from 'src/database/commands/upgrade-version-command/1-21/1-21-deduplicate-engine-commands.command';
 import { FixSelectAllCommandMenuItemsCommand } from 'src/database/commands/upgrade-version-command/1-21/1-21-fix-select-all-command-menu-items.command';
@@ -75,6 +76,7 @@ export class UpgradeCommand extends UpgradeCommandRunner {
     // 1.21 Commands
     private readonly addGlobalKeyValuePairUniqueIndexCommand: AddGlobalKeyValuePairUniqueIndexCommand,
     private readonly backfillDatasourceToWorkspaceCommand: BackfillDatasourceToWorkspaceCommand,
+    private readonly backfillMessageThreadSubjectCommand: BackfillMessageThreadSubjectCommand,
     private readonly backfillPageLayoutsAndFieldsWidgetViewFieldsCommand: BackfillPageLayoutsAndFieldsWidgetViewFieldsCommand,
     private readonly deduplicateEngineCommandsCommand: DeduplicateEngineCommandsCommand,
     private readonly fixSelectAllCommandMenuItemsCommand: FixSelectAllCommandMenuItemsCommand,
@@ -116,6 +118,7 @@ export class UpgradeCommand extends UpgradeCommandRunner {
     const commands_1210: VersionCommands = [
       this.addGlobalKeyValuePairUniqueIndexCommand,
       this.backfillDatasourceToWorkspaceCommand,
+      this.backfillMessageThreadSubjectCommand,
       this.backfillPageLayoutsAndFieldsWidgetViewFieldsCommand,
       this.deduplicateEngineCommandsCommand,
       this.fixSelectAllCommandMenuItemsCommand,