M3(批3): 微信分享 + 登录（@tencent/wechat_open_sdk）

依赖：ohpm i @tencent/wechat_open_sdk@1.0.19（feature_capabilities）

T-M3-13 ShareProvider：friendsSharetypeUrlToptitleDescript → SendMessageToWXReq(scene 会话/朋友圈)
        + WXWebpageObject → 回传 sharesuccess{success(2成功/3取消),type(1好友/2朋友圈)}。
        type 2截图/3图片/4视频暂回退网页分享（TODO）；微信未安装回 cancel 不卡死
T-M3-14 LoginProvider：accreditlogin("1"=QQ空实现/其他=微信) → SendAuthReq(scope snsapi_userinfo) → 取 code。
        🔴 AppSecret 不入端：code 换 profile 必须服务端，无端点时记录 code+TODO，不推不完整 sharelogin（红线）
WeChatApi 单例：createWXAPI(AppID wxd2bd650e06bdfe58 公开标识) + sendReq + handleWant 路由 onResp
EntryAbility.onCreate/onNewWant → WeChatApi.handleWant（接收微信回调）
module.json5：querySchemes ["weixin"]（isWXAppInstalled）

运行期成功前提（已注释说明）：微信开放平台注册本 HarmonyOS 应用(bundleName+指纹绑 AppID)、登录 profile 需服务端 code 换取端点。
devecocli build 通过（CompileArkTS 编译微信代码无误）。
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

feature_capabilities/oh-package-lock.json5

@@ -6,6 +6,7 @@
   "lockfileVersion": 3,
   "ATTENTION": "THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.",
   "specifiers": {
+    "@tencent/wechat_open_sdk@^1.0.19": "@tencent/wechat_open_sdk@1.0.19",
     "common@../common": "common@../common",
     "contracts@../contracts": "contracts@../contracts",
     "domain_resource@../domain_resource": "domain_resource@../domain_resource",
@@ -13,6 +14,13 @@
     "platform@../platform": "platform@../platform"
   },
   "packages": {
+    "@tencent/wechat_open_sdk@1.0.19": {
+      "name": "@tencent/wechat_open_sdk",
+      "version": "1.0.19",
+      "integrity": "sha512-elkkyMZVolWyhULd6zA+7xdHPRAhVja5ugyHvw/UpmeWrGfthHzNS6QtMZDMntzo7dFTNOxi8GAVvZmRA1uPBQ==",
+      "resolved": "https://ohpm.openharmony.cn/ohpm/@tencent/wechat_open_sdk/-/wechat_open_sdk-1.0.19.har",
+      "registryType": "ohpm"
+    },
     "common@../common": {
       "name": "common",
       "version": "1.0.0",