feat(android): OTA双轨更新 — shared版本号+Android Expo/PackageInstaller

- packages/shared: 版本号解析 vX.Y.Z-dav-{client}-{build} + manifest远程检查
- packages/client-android: Expo52 + expo-updates JS bundle OTA
- PackageInstallerModule.kt: APK静默安装原生模块（~60行Kotlin）
- monorepo: pnpm workspace + 版本号体系

packages/shared/src/index.ts

@@ -0,0 +1,2 @@
+export { parseVersion, compareVersion, checkUpdate, semverGt } from './updater/index';
+export type { GcaVersion, Manifest, ManifestBuild } from './updater/index';

packages/shared/src/updater/index.ts

@@ -0,0 +1,82 @@
+/** 版本号解析 vX.Y.Z-dav-{client}-{build} */
+export interface GcaVersion {
+  major: number;
+  minor: number;
+  patch: number;
+  client: 'desktop' | 'android' | 'cli';
+  build: number;
+  raw: string;
+}
+
+export interface Manifest {
+  version: string;
+  builds: Record<string, ManifestBuild>;
+}
+
+export interface ManifestBuild {
+  tag: string;
+  url: string;
+  sha256: string;
+  size: number;
+  minVersion?: string;
+}
+
+const MANIFEST_URL = 'https://git.childish-ghost.com/LukeMackin/Yuzu-GCA/releases/download/manifest/manifest.json';
+
+const VERSION_RE = /^v(\d+)\.(\d+)\.(\d+)-dav-(desktop|android|cli)-(\d+)$/;
+
+export function parseVersion(raw: string): GcaVersion | null {
+  const m = raw.trim().match(VERSION_RE);
+  if (!m) return null;
+  return {
+    major: parseInt(m[1], 10),
+    minor: parseInt(m[2], 10),
+    patch: parseInt(m[3], 10),
+    client: m[4] as GcaVersion['client'],
+    build: parseInt(m[5], 10),
+    raw,
+  };
+}
+
+export function compareVersion(a: GcaVersion, b: GcaVersion): number {
+  if (a.major !== b.major) return a.major - b.major;
+  if (a.minor !== b.minor) return a.minor - b.minor;
+  if (a.patch !== b.patch) return a.patch - b.patch;
+  return a.build - b.build;
+}
+
+/** 调用方传入本地版本号，返回是否需要更新以及目标 manifest entry */
+export async function checkUpdate(
+  client: GcaVersion['client'],
+  localVersion: GcaVersion,
+  manifestUrl = MANIFEST_URL,
+): Promise<{ shouldUpdate: boolean; build: ManifestBuild | null; remoteVersion: GcaVersion | null }> {
+  try {
+    const resp = await fetch(manifestUrl);
+    if (!resp.ok) return { shouldUpdate: false, build: null, remoteVersion: null };
+
+    const manifest: Manifest = await resp.json();
+    const build = manifest.builds[client];
+    if (!build) return { shouldUpdate: false, build: null, remoteVersion: null };
+
+    const remoteVersion = parseVersion(build.tag);
+    if (!remoteVersion) return { shouldUpdate: false, build: null, remoteVersion: null };
+
+    return {
+      shouldUpdate: compareVersion(remoteVersion, localVersion) > 0,
+      build,
+      remoteVersion,
+    };
+  } catch {
+    return { shouldUpdate: false, build: null, remoteVersion: null };
+  }
+}
+
+/** SemVer 比较（用于 expo-updates manifest） */
+export function semverGt(a: string, b: string): boolean {
+  const [aM, am, aP] = a.split('.').map(Number);
+  const [bM, bm, bP] = b.split('.').map(Number);
+  if (aM !== bM) return aM > bM;
+  if (am !== bm) return am > bm;
+  return aP > bP;
+}