v0.3.0: 单 sources 入口 + 路径后缀覆盖约定

破坏性重构。框架对外只暴露一个 `sources` glob 入口,消费侧任何 .vue
都按文件路径后缀匹配同后缀覆盖:

- shrimp/components/<name>.vue 同后缀覆盖框架内置(login/layout/topbar/ShrimpTable/...)
- shrimp/components/fields/Field<X>.vue 注册类型 <x>(首字母小写)
- shrimp/module/<key>.vue 业务模块

变更:
- 删除 customFields / moduleSources / overrideField / registerField 旧入口
- 删除 fieldOverrides Map,字段表纯靠 glob 扫描注册
- 框架内 .vue 对可覆盖 peer 改用 defineAsyncComponent(resolveVue(...))
  (login → ShrimpLangSwitch / layout → sideM/navMenu/topbar/userbar/logo /
   ShrimpTable → ShrimpEditDrawer/ShrimpFilterDrawer/...)
- views/ 全部并入 components/,App.vue 上提到 src/ 根
- LangSwitch → ShrimpLangSwitch,PowerTree → ShrimpPowerTree
- module/FieldRelativeTime.vue → components/fields/FieldRelativeTime.vue
- module/user.vue 改用 #column-updatedAt slot 替代旧的 overrideField

字段类型约定从 'field' + Name 改为 lowercase-first(FieldString → 'string'),
内置和消费侧统一。

src/components/login.vue

@@ -0,0 +1,131 @@
+<template>
+	<div class="login_bg">
+		<LangSwitch class="login-lang" />
+		<div class="login_main">
+			<div class="login-form">
+				<div class="login-header">
+					<div class="logo">
+						<label>{{ vueAdmin.adminConfig.title || 'Admin' }}</label>
+					</div>
+				</div>
+
+				<el-form ref="loginForm" :model="form" :rules="rules" label-width="0" size="large" @keyup.enter="login">
+					<el-form-item prop="user">
+						<el-input v-model="form.user" prefix-icon="el-icon-user" clearable
+							:placeholder="$t('login.userPlaceholder')">
+						</el-input>
+					</el-form-item>
+					<el-form-item prop="password">
+						<el-input v-model="form.password" prefix-icon="el-icon-lock" clearable show-password
+							:placeholder="$t('login.PWPlaceholder')"></el-input>
+					</el-form-item>
+					<el-form-item>
+						<el-button type="primary" style="width: 100%" :loading="info.islogin" round @click="login">{{
+							$t("login.signIn") }}</el-button>
+					</el-form-item>
+				</el-form>
+			</div>
+		</div>
+	</div>
+</template>
+
+<script lang="ts" setup>
+import { vueAdmin, resolveVue } from "../VueAdmin";
+import { defineAsyncComponent, reactive, computed, onMounted } from "vue";
+import { useI18n } from "vue-i18n";
+
+const LangSwitch = defineAsyncComponent(resolveVue('components/ShrimpLangSwitch.vue'));
+
+vueAdmin.token = null;
+
+let { t } = useI18n();
+
+let info = reactive({ islogin: false });
+let form = reactive({ user: import.meta.env.DEV ? "admin" : "", password: import.meta.env.DEV ? "admin" : "" });
+let rules = computed(() => ({
+	user: [{ required: true, message: t("login.userError"), trigger: "blur" }],
+	password: [{ required: true, message: t("login.PWError"), trigger: "blur" }],
+}));
+
+// 页面加载时获取后台配置
+onMounted(() => {
+	vueAdmin.fetchConfig().then(data => {
+		Object.assign(vueAdmin.adminConfig, data)
+	}).catch(() => {})
+})
+
+function login() {
+	info.islogin = true;
+	vueAdmin.fetchLogin({ username: form.user, password: form.password })
+		.then(async (data) => {
+			vueAdmin.token = data.token;
+			await vueAdmin.loadUserInfo();
+			info.islogin = false;
+			vueAdmin.router.push(vueAdmin.getFirstMenuPath());
+		})
+		.catch((e: any) => {
+			console.warn('[Login]', e.message)
+			info.islogin = false;
+		});
+}
+</script>
+
+<style scoped>
+.login_bg {
+	width: 100%;
+	height: 100%;
+	background: #fff;
+	display: flex;
+	position: relative;
+}
+
+.login_main {
+	flex: 1;
+	overflow: auto;
+	display: flex;
+}
+
+.login-form {
+	width: 400px;
+	margin: auto;
+	padding: 20px 0;
+}
+
+.login-header {
+	margin-bottom: 40px;
+}
+
+.login-header .logo {
+	display: flex;
+	align-items: center;
+	justify-content: center;
+}
+
+.login-header .logo label {
+	font-size: 26px;
+	font-weight: bold;
+}
+
+.login-lang {
+	position: absolute;
+	top: 16px;
+	right: 16px;
+}
+
+@media (max-width: 1200px) {
+	.login-form {
+		width: 340px;
+	}
+}
+
+@media (max-width: 1000px) {
+	.login_main {
+		display: block;
+	}
+
+	.login-form {
+		width: 100%;
+		padding: 20px 40px;
+	}
+}
+</style>