feat: 新增公告功能及外卖备注工具

新增公告功能接口及页面，支持查看最新公告信息
添加外卖备注工具，可管理常用备注并一键生成
优化动态筛选接口，支持多分类和标签组合筛选
移除flutter_dotenv依赖，不再使用.env文件
修复布局溢出错误处理逻辑，避免生产环境报错
新增文件选择器插件，替换receive_sharing_intent实现文件导入

pubspec.lock

@@ -338,6 +338,45 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "7.0.1"
+  file_picker_ohos:
+    dependency: "direct main"
+    description:
+      path: "packages/file_picker"
+      relative: true
+    source: path
+    version: "10.3.8"
+  file_selector_linux:
+    dependency: transitive
+    description:
+      name: file_selector_linux
+      sha256: "2567f398e06ac72dcf2e98a0c95df2a9edd03c2c2e0cacd4780f20cdf56263a0"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.9.4"
+  file_selector_macos:
+    dependency: transitive
+    description:
+      name: file_selector_macos
+      sha256: "5e0bbe9c312416f1787a68259ea1505b52f258c587f12920422671807c4d618a"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.9.5"
+  file_selector_platform_interface:
+    dependency: transitive
+    description:
+      name: file_selector_platform_interface
+      sha256: "35e0bd61ebcdb91a3505813b055b09b79dfdc7d0aee9c09a7ba59ae4bb13dc85"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.7.0"
+  file_selector_windows:
+    dependency: transitive
+    description:
+      name: file_selector_windows
+      sha256: "62197474ae75893a62df75939c777763d39c2bc5f73ce5b88497208bc269abfd"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.9.3+5"
   fixnum:
     dependency: transitive
     description:
@@ -382,14 +421,6 @@ packages:
       relative: true
     source: path
     version: "7.2.0-ohos.1"
-  flutter_dotenv:
-    dependency: "direct main"
-    description:
-      name: flutter_dotenv
-      sha256: b7c7be5cd9f6ef7a78429cabd2774d3c4af50e79cb2b7593e3d5d763ef95c61b
-      url: "https://pub.flutter-io.cn"
-    source: hosted
-    version: "5.2.1"
   flutter_lints:
     dependency: "direct dev"
     description:
@@ -418,6 +449,14 @@ packages:
       relative: true
     source: path
     version: "1.0.7-ohos.1"
+  flutter_plugin_android_lifecycle:
+    dependency: transitive
+    description:
+      name: flutter_plugin_android_lifecycle
+      sha256: "38d1c268de9097ff59cf0e844ac38759fc78f76836d37edad06fa21e182055a0"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.0.34"
   flutter_staggered_grid_view:
     dependency: "direct main"
     description:
@@ -514,6 +553,70 @@ packages:
       url: "https://pub.flutter-io.cn"
     source: hosted
     version: "4.1.2"
+  image_picker:
+    dependency: transitive
+    description:
+      name: image_picker
+      sha256: "784210112be18ea55f69d7076e2c656a4e24949fa9e76429fe53af0c0f4fa320"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "1.2.1"
+  image_picker_android:
+    dependency: transitive
+    description:
+      name: image_picker_android
+      sha256: "66810af8e99b2657ee98e5c6f02064f69bb63f7a70e343937f70946c5f8c6622"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.8.13+16"
+  image_picker_for_web:
+    dependency: transitive
+    description:
+      name: image_picker_for_web
+      sha256: "66257a3191ab360d23a55c8241c91a6e329d31e94efa7be9cf7a212e65850214"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "3.1.1"
+  image_picker_ios:
+    dependency: transitive
+    description:
+      name: image_picker_ios
+      sha256: "956c16a42c0c708f914021666ffcd8265dde36e673c9fa68c81f7d085d9774ad"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.8.13+3"
+  image_picker_linux:
+    dependency: transitive
+    description:
+      name: image_picker_linux
+      sha256: "1f81c5f2046b9ab724f85523e4af65be1d47b038160a8c8deed909762c308ed4"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.2.2"
+  image_picker_macos:
+    dependency: transitive
+    description:
+      name: image_picker_macos
+      sha256: "86f0f15a309de7e1a552c12df9ce5b59fe927e71385329355aec4776c6a8ec91"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.2.2+1"
+  image_picker_platform_interface:
+    dependency: transitive
+    description:
+      name: image_picker_platform_interface
+      sha256: "567e056716333a1647c64bb6bd873cff7622233a5c3f694be28a583d4715690c"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.11.1"
+  image_picker_windows:
+    dependency: transitive
+    description:
+      name: image_picker_windows
+      sha256: d248c86554a72b5495a31c56f060cf73a41c7ff541689327b1a7dbccc33adfae
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "0.2.2"
   intl:
     dependency: "direct main"
     description:
@@ -918,15 +1021,6 @@ packages:
       relative: true
     source: path
     version: "3.0.2-ohos.1"
-  receive_sharing_intent:
-    dependency: "direct main"
-    description:
-      path: "."
-      ref: "br_v1.8.1_ohos"
-      resolved-ref: "59f4e7c741680a5ce121a7ddc686b89d4fe03182"
-      url: "https://gitcode.com/openharmony-sig/fluttertpc_receive_sharing_intent.git"
-    source: git
-    version: "1.8.1"
   rxdart:
     dependency: transitive
     description: