refactor(web): replace enums with as const in models and service files

Convert PromptMode, PromptRole, SubjectType, AccessMode, and
AppSourceType from TypeScript enums to as const objects with
companion type aliases to reduce bundle size.

Also convert PromptRole in workflow/types.ts (required to keep
cross-module type compatibility) and add explicit generic to
useState<PromptMode> in configuration/index.tsx so TypeScript
correctly widens the inferred state type.

Part of #27998

web/app/components/app/configuration/index.tsx

@@ -392,7 +392,7 @@ const Configuration: FC = () => {
     }
   }, [textGenerationModelList, hasFetchedDetail, modelModeType, currModel, modelConfig])
 
-  const [promptMode, doSetPromptMode] = useState(PromptMode.simple)
+  const [promptMode, doSetPromptMode] = useState<PromptMode>(PromptMode.simple)
   const isAdvancedMode = promptMode === PromptMode.advanced
   const [canReturnToSimpleMode, setCanReturnToSimpleMode] = useState(true)
   const setPromptMode = async (mode: PromptMode) => {

web/app/components/workflow/types.ts

@@ -239,11 +239,14 @@ export type ModelConfig = {
   completion_params: Record<string, any>
 }
 
-export enum PromptRole {
-  system = 'system',
-  user = 'user',
-  assistant = 'assistant',
-}
+export const PromptRole = {
+  system: 'system',
+  user: 'user',
+  assistant: 'assistant',
+} as const
+
+// eslint-disable-next-line ts/no-redeclare -- value-type pair
+export type PromptRole = typeof PromptRole[keyof typeof PromptRole]
 
 export enum EditionType {
   basic = 'basic',

web/models/access-control.ts

@@ -1,14 +1,20 @@
-export enum SubjectType {
-  GROUP = 'group',
-  ACCOUNT = 'account',
-}
+export const SubjectType = {
+  GROUP: 'group',
+  ACCOUNT: 'account',
+} as const
 
-export enum AccessMode {
-  PUBLIC = 'public',
-  SPECIFIC_GROUPS_MEMBERS = 'private',
-  ORGANIZATION = 'private_all',
-  EXTERNAL_MEMBERS = 'sso_verified',
-}
+// eslint-disable-next-line ts/no-redeclare -- value-type pair
+export type SubjectType = typeof SubjectType[keyof typeof SubjectType]
+
+export const AccessMode = {
+  PUBLIC: 'public',
+  SPECIFIC_GROUPS_MEMBERS: 'private',
+  ORGANIZATION: 'private_all',
+  EXTERNAL_MEMBERS: 'sso_verified',
+} as const
+
+// eslint-disable-next-line ts/no-redeclare -- value-type pair
+export type AccessMode = typeof AccessMode[keyof typeof AccessMode]
 
 export type AccessControlGroup = {
   id: 'string'

web/models/debug.ts

@@ -13,10 +13,13 @@ import type { AgentStrategy, ModelModeType, RETRIEVE_TYPE, ToolItem, TtsAutoPlay
 
 export type Inputs = Record<string, string | number | object | boolean>
 
-export enum PromptMode {
-  simple = 'simple',
-  advanced = 'advanced',
-}
+export const PromptMode = {
+  simple: 'simple',
+  advanced: 'advanced',
+} as const
+
+// eslint-disable-next-line ts/no-redeclare -- value-type pair
+export type PromptMode = typeof PromptMode[keyof typeof PromptMode]
 
 export type PromptItem = {
   role?: PromptRole
@@ -42,11 +45,14 @@ export type BlockStatus = {
   query: boolean
 }
 
-export enum PromptRole {
-  system = 'system',
-  user = 'user',
-  assistant = 'assistant',
-}
+export const PromptRole = {
+  system: 'system',
+  user: 'user',
+  assistant: 'assistant',
+} as const
+
+// eslint-disable-next-line ts/no-redeclare -- value-type pair
+export type PromptRole = typeof PromptRole[keyof typeof PromptRole]
 
 export type PromptVariable = {
   key: string

web/service/share.ts

@@ -29,11 +29,14 @@ import {
 } from './base'
 import { getWebAppAccessToken } from './webapp-auth'
 
-export enum AppSourceType {
-  webApp = 'webApp',
-  installedApp = 'installedApp',
-  tryApp = 'tryApp',
-}
+export const AppSourceType = {
+  webApp: 'webApp',
+  installedApp: 'installedApp',
+  tryApp: 'tryApp',
+} as const
+
+// eslint-disable-next-line ts/no-redeclare -- value-type pair
+export type AppSourceType = typeof AppSourceType[keyof typeof AppSourceType]
 
 const apiPrefix = {
   [AppSourceType.webApp]: '',