feat: 配置页增加测试连接按钮，发送简单文本验证API是否可用

flomo-ai-desktop/src/app.rs

@@ -26,6 +26,10 @@ pub struct FlomoAiApp {
     new_prompt_title: String,
     new_prompt_content: String,
 
+    test_status: String,
+    test_is_loading: bool,
+    pending_test: Option<std::thread::JoinHandle<Result<String, String>>>,
+
     current_page: Page,
     theme_dirty: bool,
 }
@@ -54,6 +58,10 @@ impl FlomoAiApp {
             new_prompt_title: String::new(),
             new_prompt_content: String::new(),
 
+            test_status: "点击测试连接".to_string(),
+            test_is_loading: false,
+            pending_test: None,
+
             current_page: Page::Main,
             theme_dirty: false,
         }
@@ -84,6 +92,28 @@ impl FlomoAiApp {
                 ctx.request_repaint();
             }
         }
+
+        if let Some(handle) = self.pending_test.take() {
+            if handle.is_finished() {
+                match handle.join() {
+                    Ok(Ok(text)) => {
+                        self.test_status = format!("连接成功: {}", text.chars().take(30).collect::<String>());
+                        self.test_is_loading = false;
+                    }
+                    Ok(Err(e)) => {
+                        self.test_status = format!("连接失败: {}", e);
+                        self.test_is_loading = false;
+                    }
+                    Err(_) => {
+                        self.test_status = "测试线程错误".to_string();
+                        self.test_is_loading = false;
+                    }
+                }
+            } else {
+                self.pending_test = Some(handle);
+                ctx.request_repaint();
+            }
+        }
     }
 
     fn send_request(&mut self, ctx: &egui::Context) {
@@ -144,6 +174,38 @@ impl FlomoAiApp {
         self.settings.theme_config.mode = self.settings_selected_theme;
         let _ = save_settings(&self.settings);
     }
+
+    fn test_connection(&mut self, ctx: &egui::Context) {
+        if self.test_is_loading {
+            return;
+        }
+
+        if self.settings_base_url.is_empty() {
+            self.test_status = "错误: Base URL 不能为空".to_string();
+            return;
+        }
+
+        self.test_status = "测试中...".to_string();
+        self.test_is_loading = true;
+
+        let settings = self.settings.clone();
+        let ctx_clone = ctx.clone();
+
+        let handle = std::thread::spawn(move || {
+            let mut test_settings = settings.clone();
+            test_settings.llm_config.model = if settings.llm_config.model.is_empty() {
+                "gpt-4o".to_string()
+            } else {
+                settings.llm_config.model.clone()
+            };
+
+            let result = crate::api::call_llm(&test_settings, "你好，请回复OK".to_string(), None);
+            ctx_clone.request_repaint();
+            result
+        });
+
+        self.pending_test = Some(handle);
+    }
 }
 
 impl eframe::App for FlomoAiApp {
@@ -415,6 +477,31 @@ impl FlomoAiApp {
             ui.text_edit_singleline(&mut self.settings_model);
             ui.add_space(12.0);
 
+            // Test connection button
+            ui.horizontal(|ui| {
+                let btn_text = if self.test_is_loading { "测试中..." } else { "测试连接" };
+                let btn = egui::Button::new(btn_text)
+                    .fill(egui::Color32::from_rgb(100, 100, 255))
+                    .rounding(4.0)
+                    .min_size(egui::vec2(80.0, 32.0));
+
+                if ui.add(btn).clicked() && !self.test_is_loading {
+                    self.test_connection(ctx);
+                }
+
+                let status_color = if self.test_is_loading {
+                    egui::Color32::from_rgb(255, 165, 0)
+                } else if self.test_status.starts_with("连接成功") {
+                    egui::Color32::from_rgb(0, 180, 0)
+                } else if self.test_status.starts_with("连接失败") || self.test_status.starts_with("错误") {
+                    egui::Color32::RED
+                } else {
+                    egui::Color32::GRAY
+                };
+
+                ui.label(egui::RichText::new(&self.test_status).size(11.0).color(status_color));
+            });
+
             ui.separator();
 
             ui.label(egui::RichText::new("主题").size(14.0).strong());