feat(登录): 姓名支持拼音和拼音缩写搜索

机房电脑打中文要切输入法，选姓名前先切一次法太别扭。现在 zhangsan、zs、
xiaoxian 都能搜到张三/曾小贤，中文照旧能打。

用 pinyin-pro 的 match 而不是自己拼一份拼音串比对：多音字它两个读音都认，
单田芳搜 stf 和 dtf 都出得来，曾小贤搜 zxx 和 cengxiaoxian 也都出得来 ——
自己拼只会留下默认读音那一个，姓氏恰恰是多音字重灾区。

词典有 85 KB（gzip），静态引入会压进首屏，所以改成打开登录框才 import。
已登录的人一次都不会下载（构建产物里它是独立 chunk，只被 default 布局
动态引用；实测页面加载 0 个请求，打开登录框才有 1 个）。拉不下来时退回
纯中文匹配，不至于让人登不上。

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01YQCLjAmz6pPXMNGoZmvAmC

bun.lock

@@ -75,6 +75,7 @@
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         "pinia": "^4.0.3",
+        "pinyin-pro": "^3.29.3",
         "skulpt": "^1.2.0",
         "vue": "^3.5.41",
         "vue-chartjs": "^5.3.4",
@@ -1241,6 +1242,8 @@
 
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+    "pinyin-pro": ["pinyin-pro@3.29.3", "", {}, "sha512-+UU9bx6vfDw8amOJGHm0TE0rdQl8VPylsDWviQ5OOQ3e+on1xRP4OqDbiDuMT5OISgvfl/Y6ez1BBRaIP80GLQ=="],
+
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