refactor(i18n): 完成全量硬编码中文文案替换为多语言方案

1.  替换所有页面/组件中的硬编码中文提示文案为$lang调用，包括支付、帮助中心、公告等页面
2.  重构diy.js加载失败文案处理逻辑，支持参数化替换
3.  新增多语言混入逻辑，实现导航标题随语种动态切换
4.  重构支付组件初始化逻辑，优化平台适配代码
5.  添加多语言单元测试和硬编码扫描脚本
6.  更新语言包，新增缺失的翻译词条

scripts/hardcoded_cn_real.json

@@ -0,0 +1,264 @@
+{
+  "uni_modules/uni-calendar/components/uni-calendar/uni-calendar.vue": [
+    {
+      "kind": "template",
+      "tag": "text",
+      "text": "取消",
+      "line": 6
+    },
+    {
+      "kind": "template",
+      "tag": "text",
+      "text": "确定",
+      "line": 7
+    },
+    {
+      "kind": "template",
+      "tag": "text",
+      "text": "{{ (nowDate.year || '') + '年' + (nowDate.month || '') + '月' }}",
+      "line": 15
+    },
+    {
+      "kind": "template",
+      "tag": "text",
+      "text": "日",
+      "line": 27
+    },
+    {
+      "kind": "template",
+      "tag": "text",
+      "text": "一",
+      "line": 28
+    },
+    {
+      "kind": "template",
+      "tag": "text",
+      "text": "二",
+      "line": 29
+    },
+    {
+      "kind": "template",
+      "tag": "text",
+      "text": "三",
+      "line": 30
+    },
+    {
+      "kind": "template",
+      "tag": "text",
+      "text": "四",
+      "line": 31
+    },
+    {
+      "kind": "template",
+      "tag": "text",
+      "text": "五",
+      "line": 32
+    },
+    {
+      "kind": "template",
+      "tag": "text",
+      "text": "六",
+      "line": 33
+    }
+  ],
+  "pages_promotion/fenxiao/withdraw_list.vue": [
+    {
+      "kind": "js-text",
+      "match": "已转账",
+      "line": 45
+    },
+    {
+      "kind": "js-text",
+      "match": "待审核",
+      "line": 49
+    },
+    {
+      "kind": "js-text",
+      "match": "已审核",
+      "line": 53
+    },
+    {
+      "kind": "js-text",
+      "match": "已拒绝",
+      "line": 57
+    }
+  ],
+  "uni_modules/mp-html/components/mp-html/node/node.vue": [
+    {
+      "kind": "js-text",
+      "match": "uni.showActionSheet({\n          itemList: ['保存图片'],\n          success: () => {\n            const save = path => {\n              uni.saveImageToPhotosAlbum({\n   ",
+      "line": 289
+    },
+    {
+      "kind": "js-text",
+      "match": "uni.showToast({\n                  title: '链接已复制'\n                })",
+      "line": 368
+    },
+    {
+      "kind": "js-text",
+      "match": "保存成功",
+      "line": 297
+    },
+    {
+      "kind": "js-text",
+      "match": "链接已复制",
+      "line": 369
+    }
+  ],
+  "components-diy/diy-form.vue": [
+    {
+      "kind": "js-text",
+      "match": "uni.showToast({\n\t\t\t\t\t\t\ttitle: '提交成功',\n\t\t\t\t\t\t\ticon: 'success'\n\t\t\t\t\t\t})",
+      "line": 305
+    },
+    {
+      "kind": "js-text",
+      "match": "uni.showToast({\n\t\t\t\t\t\t\ttitle: res.message || '提交失败',\n\t\t\t\t\t\t\ticon: 'none'\n\t\t\t\t\t\t})",
+      "line": 314
+    },
+    {
+      "kind": "js-text",
+      "match": "提交成功",
+      "line": 306
+    }
+  ],
+  "uni_modules/uni-count-down/components/uni-count-down/uni-count-down.vue": [
+    {
+      "kind": "template",
+      "tag": "view",
+      "text": "{{ showColon ? ':' : '时' }}",
+      "line": 19
+    },
+    {
+      "kind": "template",
+      "tag": "view",
+      "text": "{{ showColon ? ':' : '分' }}",
+      "line": 27
+    },
+    {
+      "kind": "template",
+      "tag": "view",
+      "text": "秒",
+      "line": 35
+    }
+  ],
+  "components/ns-goods-recommend/ns-goods-recommend.vue": [
+    {
+      "kind": "js-text",
+      "match": "猜你喜欢",
+      "line": 13
+    },
+    {
+      "kind": "js-text",
+      "match": "购买",
+      "line": 20
+    }
+  ],
+  "components-diy/diy-channel-list.vue": [
+    {
+      "kind": "js-text",
+      "match": "uni.showToast({\n\t\t\t\t\t\t\t\ttitle: '视频号仅支持在微信小程序环境中播放',\n\t\t\t\t\t\t\t\ticon: 'none',\n\t\t\t\t\t\t\t\tduration: 2000\n\t\t\t\t\t\t\t})",
+      "line": 207
+    },
+    {
+      "kind": "js-text",
+      "match": "视频号仅支持在微信小程序环境中播放",
+      "line": 208
+    }
+  ],
+  "pages/index/public/js/index.js": [
+    {
+      "kind": "js-text",
+      "match": "uni.showModal({\n\t\t\t\t\ttitle: '版本信息',\n\t\t\t\t\tcontent: `提交 ID: ${v.commitId}\\n构建时间: ${v.buildTime}\\n${Config.baseUrl}`,\n\t\t\t\t\tshowCancel: false\n\t\t\t\t})",
+      "line": 160
+    },
+    {
+      "kind": "js-text",
+      "match": "版本信息",
+      "line": 161
+    }
+  ],
+  "uni_modules/uni-datetime-picker/components/uni-datetime-picker/calendar.vue": [
+    {
+      "kind": "template",
+      "tag": "text",
+      "text": "{{ (nowDate.year||'') + ' 年 ' + ( nowDate.month||'') +' 月'}}",
+      "line": 13
+    },
+    {
+      "kind": "template",
+      "tag": "view",
+      "text": "确认",
+      "line": 87
+    }
+  ],
+  "uni_modules/uni-number-box/components/uni-number-box/uni-number-box.vue": [
+    {
+      "kind": "js-text",
+      "match": "商品库存不足",
+      "line": 131
+    },
+    {
+      "kind": "js-text",
+      "match": "商品最少购买",
+      "line": 135
+    }
+  ],
+  "common/js/mp-share-default.js": [
+    {
+      "kind": "js-text",
+      "match": "小程序分享",
+      "line": 85
+    }
+  ],
+  "common/js/splash-state.js": [
+    {
+      "kind": "js-text",
+      "match": "uni.showLoading({ title: opts.title || '加载中...', mask: false })",
+      "line": 111
+    }
+  ],
+  "pages/index/index.vue": [
+    {
+      "kind": "template",
+      "tag": "text",
+      "text": "{{ diyLoadErrorMsg || '网络异常，请稍后重试' }}",
+      "line": 8
+    }
+  ],
+  "pages_goods/public/js/list.js": [
+    {
+      "kind": "js-text",
+      "match": "购买",
+      "line": 40
+    }
+  ],
+  "pages_tool/help/list.vue": [
+    {
+      "kind": "js-text",
+      "match": "帮助中心",
+      "line": 82
+    }
+  ],
+  "pages_tool/notice/list.vue": [
+    {
+      "kind": "js-text",
+      "match": "公告",
+      "line": 80
+    }
+  ],
+  "pages_tool/pay/index.vue": [
+    {
+      "kind": "js-text",
+      "match": "未获取到支付信息！",
+      "line": 54
+    }
+  ],
+  "uni_modules/uni-datetime-picker/components/uni-datetime-picker/time-picker.vue": [
+    {
+      "kind": "js-text",
+      "match": "日期和时间",
+      "line": 112
+    }
+  ]
+}