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

.qoder/skills/understand/languages/javascript.md

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+# JavaScript Language Prompt Snippet
+
+## Key Concepts
+
+- **Closures**: Functions that capture variables from their enclosing lexical scope
+- **Prototypes**: Prototype chain-based inheritance underlying all JavaScript objects
+- **Promises**: Asynchronous value containers enabling `.then()` chaining and `async/await`
+- **Event Loop**: Single-threaded concurrency model with microtask and macrotask queues
+- **Destructuring**: Extract values from objects and arrays into distinct variables
+- **Spread/Rest Operators**: `...` for expanding iterables or collecting remaining arguments
+- **Proxies**: Meta-programming construct to intercept and customize object operations
+- **Generators**: Functions using `function*` and `yield` for lazy iteration
+- **Symbol**: Unique, immutable primitive used for non-string property keys
+- **WeakMap/WeakSet**: Collections with weakly-held keys allowing garbage collection
+- **Modules (ESM vs CJS)**: ES Modules use `import/export`; CommonJS uses `require/module.exports`
+
+## Import Patterns
+
+- `import { X } from 'module'` — ESM named import
+- `const X = require('module')` — CommonJS require
+- `import('module')` — dynamic import returning a Promise (code splitting)
+- `export default X` / `export { X }` — ESM export forms
+
+## File Patterns
+
+- `index.js` — barrel file or directory entry point
+- `.mjs` — explicitly ES Module files
+- `.cjs` — explicitly CommonJS files
+- `package.json` `"type"` field — sets default module system (`"module"` or `"commonjs"`)
+
+## Common Frameworks
+
+- **React** — Declarative UI with virtual DOM and component model
+- **Vue** — Progressive framework with reactivity system and single-file components
+- **Express** — Minimal and flexible Node.js web application framework
+- **Next.js** — React framework for production with hybrid rendering
+- **Svelte** — Compile-time framework that shifts work from runtime to build step
+
+## Example Language Notes
+
+> Closure captures outer `config` variable, providing encapsulated state without class
+> overhead. The returned object's methods share access to the same `config` reference,
+> forming a module pattern that was standard before ES Modules.
+>
+> When encountering `.mjs` vs `.cjs` extensions, the module system is determined by
+> extension regardless of the `package.json` type field — useful in mixed codebases.