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/fraction.js/fraction.d.ts

@@ -0,0 +1,79 @@
+declare class Fraction {
+  constructor();
+  constructor(num: Fraction.FractionInput);
+  constructor(numerator: number | bigint, denominator: number | bigint);
+
+  s: bigint;
+  n: bigint;
+  d: bigint;
+
+  abs(): Fraction;
+  neg(): Fraction;
+
+  add: Fraction.FractionParam;
+  sub: Fraction.FractionParam;
+  mul: Fraction.FractionParam;
+  div: Fraction.FractionParam;
+  pow: Fraction.FractionParam;
+  log: Fraction.FractionParam;
+  gcd: Fraction.FractionParam;
+  lcm: Fraction.FractionParam;
+
+  mod(): Fraction;
+  mod(num: Fraction.FractionInput): Fraction;
+
+  ceil(places?: number): Fraction;
+  floor(places?: number): Fraction;
+  round(places?: number): Fraction;
+  roundTo: Fraction.FractionParam;
+
+  inverse(): Fraction;
+  simplify(eps?: number): Fraction;
+
+  equals(num: Fraction.FractionInput): boolean;
+  lt(num: Fraction.FractionInput): boolean;
+  lte(num: Fraction.FractionInput): boolean;
+  gt(num: Fraction.FractionInput): boolean;
+  gte(num: Fraction.FractionInput): boolean;
+  compare(num: Fraction.FractionInput): number;
+  divisible(num: Fraction.FractionInput): boolean;
+
+  valueOf(): number;
+  toString(decimalPlaces?: number): string;
+  toLatex(showMixed?: boolean): string;
+  toFraction(showMixed?: boolean): string;
+  toContinued(): bigint[];
+  clone(): Fraction;
+
+  static default: typeof Fraction;
+  static Fraction: typeof Fraction;
+}
+
+declare namespace Fraction {
+  interface NumeratorDenominator { n: number | bigint; d: number | bigint; }
+  type FractionInput =
+    | Fraction
+    | number
+    | bigint
+    | string
+    | [number | bigint | string, number | bigint | string]
+    | NumeratorDenominator;
+
+  type FractionParam = {
+    (numerator: number | bigint, denominator: number | bigint): Fraction;
+    (num: FractionInput): Fraction;
+  };
+}
+
+/**
+ * Export matches CJS runtime:
+ *   module.exports = Fraction;
+ *   module.exports.default  = Fraction;
+ *   module.exports.Fraction = Fraction;
+ */
+declare const FractionExport: typeof Fraction & {
+  default: typeof Fraction;
+  Fraction: typeof Fraction;
+};
+
+export = FractionExport;