feat(proxy): add full URL mode and refactor endpoint rewriting (#1561)

* feat(proxy): add full URL mode and refactor endpoint rewriting

- Add `isFullUrl` provider meta to treat base_url as complete API endpoint
- Remove hardcoded `?beta=true` from Claude adapter, pass through from client
- Refactor forwarder endpoint rewriting with proper query string handling
- Block provider switching when proxy is required but not running
- Add full URL toggle UI in endpoint field with i18n (zh/en/ja)

* refactor(proxy): remove beta query handling

* fix(proxy): strip beta query when rewriting Claude endpoints

* feat(codex): complete full URL support

* refactor(ui): refine full URL endpoint hint

src-tauri/src/proxy/providers/claude.rs

@@ -298,7 +298,7 @@ impl ProviderAdapter for ClaudeAdapter {
         //
         // 现在 OpenRouter 已推出 Claude Code 兼容接口，因此默认直接透传 endpoint。
         // 如需回退旧逻辑，可在 forwarder 中根据 needs_transform 改写 endpoint。
-
+        //
         let mut base = format!(
             "{}/{}",
             base_url.trim_end_matches('/'),
@@ -310,24 +310,7 @@ impl ProviderAdapter for ClaudeAdapter {
             base = base.replace("/v1/v1", "/v1");
         }
 
-        // GitHub Copilot 不需要 ?beta=true 参数
-        if base_url.contains("githubcopilot.com") {
-            return base;
-        }
-
-        // 为 Claude 原生 /v1/messages 端点添加 ?beta=true 参数
-        // 这是某些上游服务（如 DuckCoding）验证请求来源的关键参数
-        // 注意：不要为 OpenAI Chat Completions (/v1/chat/completions) 添加此参数
-        //       当 apiFormat="openai_chat" 时，请求会转发到 /v1/chat/completions，
-        //       但该端点是 OpenAI 标准，不支持 ?beta=true 参数
-        if endpoint.contains("/v1/messages")
-            && !endpoint.contains("/v1/chat/completions")
-            && !endpoint.contains('?')
-        {
-            format!("{base}?beta=true")
-        } else {
-            base
-        }
+        base
     }
 
     fn add_auth_headers(&self, request: RequestBuilder, auth: &AuthInfo) -> RequestBuilder {
@@ -578,23 +561,20 @@ mod tests {
     #[test]
     fn test_build_url_anthropic() {
         let adapter = ClaudeAdapter::new();
-        // /v1/messages 端点会自动添加 ?beta=true 参数
         let url = adapter.build_url("https://api.anthropic.com", "/v1/messages");
-        assert_eq!(url, "https://api.anthropic.com/v1/messages?beta=true");
+        assert_eq!(url, "https://api.anthropic.com/v1/messages");
     }
 
     #[test]
     fn test_build_url_openrouter() {
         let adapter = ClaudeAdapter::new();
-        // /v1/messages 端点会自动添加 ?beta=true 参数
         let url = adapter.build_url("https://openrouter.ai/api", "/v1/messages");
-        assert_eq!(url, "https://openrouter.ai/api/v1/messages?beta=true");
+        assert_eq!(url, "https://openrouter.ai/api/v1/messages");
     }
 
     #[test]
     fn test_build_url_no_beta_for_other_endpoints() {
         let adapter = ClaudeAdapter::new();
-        // 非 /v1/messages 端点不添加 ?beta=true
         let url = adapter.build_url("https://api.anthropic.com", "/v1/complete");
         assert_eq!(url, "https://api.anthropic.com/v1/complete");
     }
@@ -602,16 +582,20 @@ mod tests {
     #[test]
     fn test_build_url_preserve_existing_query() {
         let adapter = ClaudeAdapter::new();
-        // 已有查询参数时不重复添加
         let url = adapter.build_url("https://api.anthropic.com", "/v1/messages?foo=bar");
         assert_eq!(url, "https://api.anthropic.com/v1/messages?foo=bar");
     }
 
+    #[test]
+    fn test_build_url_no_beta_for_github_copilot() {
+        let adapter = ClaudeAdapter::new();
+        let url = adapter.build_url("https://api.githubcopilot.com", "/v1/messages");
+        assert_eq!(url, "https://api.githubcopilot.com/v1/messages");
+    }
+
     #[test]
     fn test_build_url_no_beta_for_openai_chat_completions() {
         let adapter = ClaudeAdapter::new();
-        // OpenAI Chat Completions 端点不添加 ?beta=true
-        // 这是 Nvidia 等 apiFormat="openai_chat" 供应商使用的端点
         let url = adapter.build_url("https://integrate.api.nvidia.com", "/v1/chat/completions");
         assert_eq!(url, "https://integrate.api.nvidia.com/v1/chat/completions");
     }