feat: 添加投标项目查看器的Ionic移动端应用

新增基于Ionic + Vue 3 + TypeScript + Tailwind CSS的移动端应用，适配Android平台。主要功能包括AI推荐项目展示、爬虫信息统计、置顶项目管理和下拉刷新功能。同时更新前后端API端口配置为3300。

ionic-app/android/build.gradle

@@ -0,0 +1,29 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+
+buildscript {
+    
+    repositories {
+        google()
+        mavenCentral()
+    }
+    dependencies {
+        classpath 'com.android.tools.build:gradle:8.2.1'
+        classpath 'com.google.gms:google-services:4.4.0'
+
+        // NOTE: Do not place your application dependencies here; they belong
+        // in the individual module build.gradle files
+    }
+}
+
+apply from: "variables.gradle"
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+    }
+}
+
+task clean(type: Delete) {
+    delete rootProject.buildDir
+}