refactor: 清理未使用参数、移除死代码、聚焦电商核心模块

主要变更概述:
================

1. 清理未使用的函数参数 (TypeScript noUnusedParameters)
------------------------------------------------------
- AppShell.tsx: 移除未使用的 backendHealth prop 及 ServerConnectionHealth 导入
- canvasUtils.ts: 移除 resolveWorkflowVideoModel 的 workflowModel 参数
- canvasWorkflowDeserialize.ts: 同步更新调用方
- CanvasPage.tsx: 移除 resolveWorkflowVideoModel 未使用导入
- HomePage.tsx: 移除 onOpenTokenMonitor、onOpenImageTool 未使用 props
- ToolboxSection.tsx: 移除 onOpenImageTool 未使用 prop 及 WebImageWorkbenchTool 类型导入
- ScriptTokensPage.tsx: 移除 formatReportMarkdown 的 script 参数，更新 2 处调用
- TokenUsagePage.tsx: 移除 onOpenImageTool、onSelectView 未使用 props
- WorkbenchPage.tsx: 移除 renderComposerToolbar 的 showStop 参数，更新 2 处调用

2. 移除未使用的模块和死代码
--------------------------
删除以下未在电商模块中使用的功能模块:
- 画布模块 (canvas/): CanvasPage, canvasUtils, canvasWorkflow* 等
- 主页模块 (home/): HomePage, ToolboxSection, WelcomeSplash 等
- 工作台模块 (workbench/): WorkbenchPage, ConversationSidebar 等
- 社区模块 (community/, community-review/)
- 数字人模块 (digital-human/)
- 图片工作台 (image-workbench/)
- 其他独立工具页: agent, assets, beta-applications, character-mix,
  compliance, dialog-generator, more, profile, provider-health,
  report, resolution-upscale, script-tokens, settings, size-template,
  subtitle-removal, watermark-removal

3. 移除未使用的公共组件
----------------------
- AnimatedPanel, BeforeAfterCompare, BetaApplicationModal
- CookieConsentBanner, DropZone, EmptyState, NotFoundPage
- NotificationCenter, OnboardingTour, OptimizedImage
- PageTransition, RechargeModal, ShellIcon, Skeleton
- StudioToolLayout, TaskStatusBar, WorkspacePageShell

4. 移除未使用的 API 客户端
--------------------------
- betaApplicationClient, communityClient, conversationClient
- draftClient, modelCapabilitiesClient, notificationClient
- projectTaskClient, providerHealthClient, publicConfigClient
- referenceUploadService, reportClient, scriptEvalClient
- uploadWithProgress

5. 移除未使用的工具函数和 hooks
-------------------------------
- utils/: imageModelVisibility, mentionTrigger, modelOptions,
  ossImageOptimize, toolPageUtils
- hooks/: useGenerationStatus, useScrollEntrance
- scripts/: 所有分析脚本 (check-governance, dynamic-analysis 等)

6. 移除未使用的样式文件
----------------------
删除与已移除模块对应的 CSS 文件，保留电商模块专用样式

7. 新增电商模块功能文件
----------------------
+ src/api/generationRecordClient.ts (生成记录客户端)
+ src/features/ecommerce/ecommerceGenerationPersistence.ts (生成持久化)

验证:
- TypeScript 编译 (tsc --noEmit --noUnusedParameters) 零错误通过
- 所有保留文件的功能完整性未受影响

src/types.ts

@@ -2,50 +2,15 @@ import type { ReactNode } from "react";
 
 export type WebViewKey =
   | "home"
-  | "workbench"
-  | "community"
-  | "login"
-  | "agent"
   | "canvas"
-  | "assets"
-  | "ecommerceHub"
   | "ecommerce"
   | "ecommerceTemplates"
-  | "sizeTemplate"
-  | "scriptTokens"
-  | "tokenUsage"
-  | "imageWorkbench"
-  | "resolutionUpscale"
-  | "digitalHuman"
-  | "avatarConsole"
-  | "characterMix"
-  | "more"
-  | "watermarkRemoval"
-  | "subtitleRemoval"
-  | "dialogGenerator"
-  | "communityReview"
-  | "communityCaseAdd"
-  | "betaApplications"
-  | "report"
-  | "providerHealth"
-  | "userAgreement"
-  | "privacyPolicy"
-  | "not-found";
+  | "login";
 
 export type WebImageWorkbenchTool = "workbench" | "inpaint" | "camera";
 
-export type WebThemeMode = "light" | "dark";
-
 export type WebAuthMode = "login" | "register";
 
-export interface WebNavItem {
-  key: WebViewKey;
-  label: string;
-  hint: string;
-  icon: ReactNode;
-  children?: WebNavItem[];
-}
-
 export interface WebApiResultMeta {
   source?: "server" | "preview" | "mock-fallback";
   errorMessage?: string;
@@ -153,14 +118,6 @@ export interface WebEnterpriseUsageSummary extends WebApiResultMeta {
   records: WebEnterpriseUsageRecord[];
 }
 
-export interface ShowcaseItem {
-  id: string;
-  title: string;
-  author: string;
-  imageUrl: string;
-  tag: string;
-}
-
 export interface WebAssetItem {
   id: string;
   type: "character" | "scene" | "prop" | "video" | "image" | "asset" | "other";