feat: add request.js utility, service page, and fix hospital image URLs

- Add request.js for unified API calls with loading/error handling
- Add service page (service type listing)
- Fix hospital list to load from API with proper image URL construction
- Add service types dynamic loading on index page
- Various mini program improvements (order, care, wallet pages)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

peizhen/app/build.gradle

@@ -14,14 +14,6 @@ android {
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         multiDexEnabled true //突破应用方法数65535的一个限制
     }
-    signingConfigs {
-        release {
-            storeFile file('july.jks')
-            storePassword "july"
-            keyAlias "123456"
-            keyPassword "123456"
-        }
-    }
     signingConfigs {
         release {
             storeFile file('ruilaizi.jks')
@@ -39,7 +31,7 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
         release {
-            // 生产环境 —— 连接公网服务器
+            // 生产环境 —— 通过域名访问
             buildConfigField "String", "API_BASE_URL", '"http://101.43.95.130:8039"'
             minifyEnabled false
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'