refactor: migrate frontend to React + Tailwind, add Docker + tests

Replace the vanilla-TS innerHTML frontend with a type-checked React
component tree (React 19 + Tailwind v4 + Vite).

Frontend:
- 14 components: Header, Stepper, LoginPage, LoginModal, SignPage,
  DropZone, DevicePicker, ProgressCard, SavedAccountsList, TrustModal,
  TwoFactorModal, Button, Field, Chip, Modal
- lib/ extracts: storage (10 localStorage keys preserved), pair-record,
  account-session, log-parser, ids, use-log hook
- flows/ encapsulate async pair/login/sign/install with dependency injection
- Accounts page as main view with Add Account modal
- Fullscreen progress overlay during sign/install
- Account selector + device picker on Sign page
- Security notice in login modal (server trust warning)
- All addLog calls mirrored to console.log for devtools debugging

Build:
- bun run dev: submodule init + install + wasm dist + vite + wrangler
- bun run setup: one-shot project bootstrap
- Docker: multi-stage bun build → nginx on :3000
- build:wasm:dist copies pre-built src→dist (no Rust/Emscripten needed)
- jszip/node-forge/fflate pre-bundled for CJS→ESM conversion

Tests:
- 163 vitest tests (happy-dom): all lib, components, App integration,
  WASM dist artifact checks, libcurl Apple connectivity, anisette init
  error handling

Cleanup:
- Delete yarn.lock (bun.lock canonical), expand .gitignore
- Remove README.zh.md, rewrite README.md + AGENTS.md
- Update libcurl.js submodule to f65d440 (CI build artifacts)

frontend/vite.config.ts

@@ -1,34 +1,36 @@
-import { defineConfig } from "vite"
-import tailwindcss from "@tailwindcss/vite"
-import { dirname, resolve } from "node:path"
-import { fileURLToPath } from "node:url"
+import { defineConfig } from 'vite';
+import react from '@vitejs/plugin-react';
+import tailwindcss from '@tailwindcss/vite';
+import { dirname, resolve } from 'node:path';
+import { fileURLToPath } from 'node:url';
 
-const frontendDir = dirname(fileURLToPath(import.meta.url))
-const repoRootDir = resolve(frontendDir, "..")
+const frontendDir = dirname(fileURLToPath(import.meta.url));
+const repoRootDir = resolve(frontendDir, '..');
 
 export default defineConfig({
-  plugins: [tailwindcss()],
+  plugins: [react(), tailwindcss()],
   server: {
     fs: {
       allow: [repoRootDir],
     },
     proxy: {
-      "/wisp": { target: "ws://localhost:8787", ws: true },
+      '/wisp': { target: 'ws://localhost:8787', ws: true },
     },
   },
   resolve: {
     alias: {
-      webmuxd: resolve(frontendDir, "src/webmuxd-browser.js"),
+      webmuxd: resolve(frontendDir, 'src/webmuxd-browser.js'),
     },
   },
   optimizeDeps: {
+    include: ['jszip', 'node-forge', 'fflate'],
     exclude: [
-      "altsign.js",
-      "@lbr77/anisette-js",
-      "@lbr77/anisette-js/browser",
-      "@lbr77/zsign-wasm-resigner-wrapper",
-      "libcurl.js",
-      "libcurl.js/bundled",
+      'altsign.js',
+      '@lbr77/anisette-js',
+      '@lbr77/anisette-js/browser',
+      '@lbr77/zsign-wasm-resigner-wrapper',
+      'libcurl.js',
+      'libcurl.js/bundled',
     ],
   },
   build: {
@@ -36,4 +38,4 @@ export default defineConfig({
       include: [/node_modules/],
     },
   },
-})
+});