fix(security): 添加VITE_PAYMENT_URL环境变量配置

.qoder/skills/understand/languages/java.md

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+# Java Language Prompt Snippet
+
+## Key Concepts
+
+- **Generics (with Erasure)**: Parameterized types erased at runtime; compile-time safety only
+- **Annotations**: Metadata markers (`@Override`, `@Autowired`) processed at compile or runtime
+- **Interfaces and Abstract Classes**: Contracts with default methods (Java 8+) and partial implementations
+- **Streams API**: Functional-style pipeline operations on collections (filter, map, reduce)
+- **Lambdas**: Concise anonymous function syntax for functional interfaces
+- **Sealed Classes**: Restricted class hierarchies with explicit permitted subclasses (Java 17+)
+- **Records**: Immutable data carriers with auto-generated accessors, equals, hashCode (Java 16+)
+- **Dependency Injection**: IoC pattern central to Spring; constructor, field, or method injection
+- **Checked vs Unchecked Exceptions**: Checked must be declared or caught; unchecked extend RuntimeException
+- **Optional**: Container for nullable values encouraging explicit handling over null checks
+
+## Import Patterns
+
+- `import package.Class` — import a specific class
+- `import package.*` — wildcard import of all classes in a package
+- `import static package.Class.method` — static import for direct method/constant access
+
+## File Patterns
+
+- `src/main/java/` — source root following Maven/Gradle standard layout
+- `src/test/java/` — test source root with matching package structure
+- `pom.xml` — Maven project configuration and dependency management
+- `build.gradle` — Gradle build script (Groovy or Kotlin DSL)
+- `Application.java` — Spring Boot entry point with `@SpringBootApplication`
+
+## Common Frameworks
+
+- **Spring Boot** — Opinionated framework for production-ready Spring applications
+- **Jakarta EE** — Enterprise Java standards (formerly Java EE) for server-side development
+- **Quarkus** — Cloud-native framework optimized for GraalVM and containers
+- **Micronaut** — Compile-time DI framework for microservices and serverless
+- **Hibernate** — ORM framework implementing JPA specification
+
+## Example Language Notes
+
+> Uses `@Autowired` annotation for constructor injection, following Spring IoC container
+> pattern. Constructor injection is preferred over field injection because it makes
+> dependencies explicit and enables immutability.
+>
+> The Maven standard directory layout (`src/main/java`, `src/test/java`) is a strong
+> convention — most build tools and IDEs expect this structure by default.