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/fields/FieldRelativeTime.vue

@@ -0,0 +1,42 @@
+<template>
+    <template v-if="mode === 'display'">
+        <el-tooltip :content="fullTime" placement="top">
+            <span>{{ relativeTime }}</span>
+        </el-tooltip>
+    </template>
+    <el-date-picker v-else :model-value="modelValue" @update:model-value="$emit('update:modelValue', $event)" :disabled="disabled" type="datetime" style="width: 100%" />
+</template>
+
+<script lang="ts" setup>
+import { computed } from 'vue'
+import { useI18n } from 'vue-i18n'
+import { vueAdmin } from '../VueAdmin'
+
+const { t } = useI18n()
+
+const props = defineProps<{
+    field: any
+    modelValue: any
+    mode: 'display' | 'edit'
+    disabled?: boolean
+}>()
+
+defineEmits<{
+    'update:modelValue': [value: any]
+}>()
+
+const fullTime = computed(() => {
+    if (!props.modelValue) return '-'
+    return new Date(props.modelValue).toLocaleString(vueAdmin.locale === 'en' ? 'en-US' : 'zh-CN')
+})
+
+const relativeTime = computed(() => {
+    if (!props.modelValue) return '-'
+    const diff = Date.now() - props.modelValue
+    if (diff < 60000) return t('table.justNow')
+    if (diff < 3600000) return t('table.minutesAgo', { n: Math.floor(diff / 60000) })
+    if (diff < 86400000) return t('table.hoursAgo', { n: Math.floor(diff / 3600000) })
+    if (diff < 2592000000) return t('table.daysAgo', { n: Math.floor(diff / 86400000) })
+    return fullTime.value
+})
+</script>