fix(proxy): unify preview/runtime URL rules and proxy checks

- align Codex preview URL building with runtime /v1 normalization

- align Claude full-url detection with runtime adapter patterns

- reflect Claude ?beta=true in proxy preview and avoid query-only mismatch false positives

- enforce openai_chat proxy requirement even when baseUrl is missing

- wire Codex api format selector through ProviderForm and persist meta/config

- fix EndpointField stale async preview race on clear

- add pending feedback for ProxyToggle pre-disable checks

- deduplicate provider baseUrl extraction into a shared util

src/types.ts

@@ -140,10 +140,14 @@ export interface ProviderMeta {
   costMultiplier?: string;
   // 供应商计费模式来源
   pricingModelSource?: string;
-  // Claude API 格式（仅 Claude 供应商使用）
+  // 供应商 API 格式
+  // Claude:
   // - "anthropic": 原生 Anthropic Messages API 格式，直接透传
   // - "openai_chat": OpenAI Chat Completions 格式，需要格式转换
-  apiFormat?: "anthropic" | "openai_chat";
+  // Codex:
+  // - "responses": OpenAI Responses API
+  // - "chat": OpenAI Chat Completions API
+  apiFormat?: "anthropic" | "openai_chat" | "responses" | "chat";
 }
 
 // Skill 同步方式