refactor(common/lang): add shared component lang pack support

add shared language pack system for cross-page components, normalize component and page lang packs automatically, inject shared packs during language merge

common/js/lang.js

@@ -20,6 +20,95 @@ const _fieldResultCache = {};
 let _cachedLangPath = '';
 let _cachedLangPathPage = null;
 
+// 组件级共享语言包。
+// 这些语言包不隶属于某个页面，但组件会在任意页面中直接调用
+// $lang('components.xxx') / $lang('components-diy.xxx')。
+// 因此必须在每个页面的合并语言包中统一注入，否则运行时会出现 raw key。
+const SHARED_LANG_PACKS = [
+	'components/img-cropping',
+	'components/mescroll',
+	'components/ns-birthday-gift',
+	'components/ns-form',
+	'components/ns-login',
+	'components/ns-new-gift',
+	'components/ns-newform',
+	'components/ns-payment',
+	'components/ns-select-time',
+	'components/nsChatOrder',
+	'components/nsContact',
+	'components/nsGoodsPromotion',
+	'components/payment',
+	'components/privacy-popup',
+	'components/register-reward',
+	'components/wxwork-contact',
+	'components/yuyue-date',
+	'components-diy/diy-article',
+	'components-diy/diy-bargain',
+	'components-diy/diy-category',
+	'components-diy/diy-category-item',
+	'components-diy/diy-coupon',
+	'components-diy/diy-fenxiao-goods-list',
+	'components-diy/diy-goods-list',
+	'components-diy/diy-index-page',
+	'components-diy/diy-member-info',
+	'components-diy/diy-notice',
+	'components-diy/diy-payment-qrcode',
+	'components-diy/diy-pinfan',
+	'components-diy/diy-pintuan',
+	'components-diy/diy-seckill',
+	'components-diy/diy-store',
+	'components-diy/diy-video',
+];
+
+function toCamelCaseName(name) {
+	return String(name || '').replace(/-([a-z])/g, function(_, letter) {
+		return letter.toUpperCase();
+	});
+}
+
+function normalizeSharedLangPack(path, langData) {
+	if (!langData || typeof langData !== 'object') return {};
+
+	const segments = String(path || '').split('/');
+	const group = segments[0];
+	const fileName = segments[segments.length - 1];
+	if (group !== 'components' && group !== 'components-diy') return langData;
+
+	if (langData[group]) return langData;
+
+	const componentName = toCamelCaseName(fileName);
+	const keys = Object.keys(langData);
+
+	if (keys.length === 1 && langData[keys[0]] && typeof langData[keys[0]] === 'object') {
+		return {
+			[group]: langData
+		};
+	}
+
+	return {
+		[group]: {
+			[componentName]: langData
+		}
+	};
+}
+
+function normalizePageLangPack(path, langData) {
+	if (!path || !langData || typeof langData !== 'object') return langData || {};
+
+	const segments = String(path).split('/').filter(Boolean);
+	if (!segments.length) return langData;
+
+	let namespaced = {};
+	let cursor = namespaced;
+	for (let i = 0; i < segments.length; i++) {
+		const segment = toCamelCaseName(segments[i]);
+		cursor[segment] = i === segments.length - 1 ? deepCloneLang(langData) : {};
+		cursor = cursor[segment];
+	}
+
+	return deepMergeLang(deepCloneLang(langData), namespaced);
+}
+
 // 清除所有语言缓存(切语言/切租户/远端覆写更新时调用)
 function invalidateLangCaches() {
 	for (const k in _mergedLangCache) { if (Object.prototype.hasOwnProperty.call(_mergedLangCache, k)) delete _mergedLangCache[k]; }
@@ -715,8 +804,15 @@ export default {
 			if (!mergedLang) {
 				try {
 					const lang = loadLangPackSync(locale, 'common');
-					const currentPageLang = langPath ? loadLangPackSync(locale, langPath) : {};
-					mergedLang = deepMergeLang(deepCloneLang(lang), deepCloneLang(currentPageLang));
+					const currentPageLang = langPath ? normalizePageLangPack(langPath, loadLangPackSync(locale, langPath)) : {};
+					mergedLang = deepCloneLang(lang);
+					for (const sharedPath of SHARED_LANG_PACKS) {
+						const sharedLang = normalizeSharedLangPack(sharedPath, loadLangPackSync(locale, sharedPath));
+						if (sharedLang && typeof sharedLang === 'object') {
+							mergedLang = deepMergeLang(mergedLang, deepCloneLang(sharedLang));
+						}
+					}
+					mergedLang = deepMergeLang(mergedLang, deepCloneLang(currentPageLang));
 					const ovr = overrideCache[getOverrideMemKey(locale)];
 					if (ovr && ovr.map) applyOverrides(mergedLang, ovr.map);
 				} catch (e) {