feat: HSAP platform v2 — modular navigation, quality review, audit log, world model simulation

Major changes:
- New frontend (platform/web/): Vite + React 18 + TypeScript + Tailwind
- 4-module navigation: 数据送标 / 模型管理 / 车队管理 / 系统管理
- Data catalog with charts (DMS/ADAS/Lane 3-tab view)
- Quality review workflow (标注质检): Good/Fine/Bad scoring with auto-advance
- Audit enhancements: batch operations, rejection categories, Feishu notifications
- Operation audit log (操作日志)
- World model simulation studio (仿真工坊)
- Dataset version management with snapshots and diff
- ADAS 7-class dataset integration (138K images organized + compressed)
- User management with Feishu integration and pagination
- CRUD/search/filter on all pages, card layout redesign
- PIL-optimized image overlay rendering
- Auto-snapshot on build, in_review workflow stage
- Removed embedded algorithm code (now in workspace)

platform/web/node_modules/postcss/lib/stringifier.d.ts

@@ -0,0 +1,45 @@
+import {
+  AnyNode,
+  AtRule,
+  Builder,
+  Comment,
+  Container,
+  Declaration,
+  Document,
+  Root,
+  Rule
+} from './postcss.js'
+
+declare namespace Stringifier {
+  export { Stringifier_ as default }
+}
+
+declare class Stringifier_ {
+  builder: Builder
+  constructor(builder: Builder)
+  atrule(node: AtRule, semicolon?: boolean): void
+  beforeAfter(node: AnyNode, detect: 'after' | 'before'): string
+  block(node: AnyNode, start: string): void
+  body(node: Container): void
+  comment(node: Comment): void
+  decl(node: Declaration, semicolon?: boolean): void
+  document(node: Document): void
+  raw(node: AnyNode, own: null | string, detect?: string): boolean | string
+  rawBeforeClose(root: Root): string | undefined
+  rawBeforeComment(root: Root, node: Comment): string | undefined
+  rawBeforeDecl(root: Root, node: Declaration): string | undefined
+  rawBeforeOpen(root: Root): string | undefined
+  rawBeforeRule(root: Root): string | undefined
+  rawColon(root: Root): string | undefined
+  rawEmptyBody(root: Root): string | undefined
+  rawIndent(root: Root): string | undefined
+  rawSemicolon(root: Root): boolean | undefined
+  rawValue(node: AnyNode, prop: string): number | string
+  root(node: Root): void
+  rule(node: Rule): void
+  stringify(node: AnyNode, semicolon?: boolean): void
+}
+
+declare class Stringifier extends Stringifier_ {}
+
+export = Stringifier