新增: 星座运势+AI资讯+知识卡片+桌面设置窗口+秒显示开关

- 星座运势: 天聚数行API集成，5维进度条+幸运标签+今日概述
- AI资讯: 天聚数行API，图文布局5条展示，文件缓存2小时刷新
- 知识卡片: AI生成，关键字+提示词配置，30分钟刷新
- 桌面设置: 独立WebView2窗口，760x1350，含壁纸/布局/城市/颜色等配置
- 显示控制: 壁纸/时间/天气/星座/知识/AI资讯独立开关，秒显示开关
- 文件缓存: 星座运势+AI资讯缓存到本地，启动即显示上次数据
- initDone防抖: 防止设置窗口初始化触发卡片重载

ainews.go

@@ -0,0 +1,165 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"sync"
+	"time"
+)
+
+const tianapiAIURL = "https://apis.tianapi.com/ai/index"
+
+type aiNewsResp struct {
+	Code   int `json:"code"`
+	Result struct {
+		Newslist []struct {
+			ID          string `json:"id"`
+			CTime       string `json:"ctime"`
+			Title       string `json:"title"`
+			Description string `json:"description"`
+			Source      string `json:"source"`
+			URL         string `json:"url"`
+			PicUrl      string `json:"picUrl"`
+		} `json:"newslist"`
+	} `json:"result"`
+}
+
+type aiNewsItem struct {
+	Title       string `json:"title"`
+	Description string `json:"description"`
+	Source      string `json:"source"`
+	CTime       string `json:"ctime"`
+	URL         string `json:"url"`
+	PicURL      string `json:"picUrl"`
+}
+
+var (
+	aiNewsMu      sync.Mutex
+	aiNewsCache   []aiNewsItem
+	aiNewsCacheAt time.Time
+)
+
+func aiNewsCachePath() string {
+	return filepath.Join(configDir(), "ainews_cache.json")
+}
+
+func fetchAINews() []aiNewsItem {
+	aiNewsMu.Lock()
+	if aiNewsCache != nil && time.Since(aiNewsCacheAt) < 2*time.Hour {
+		cached := aiNewsCache
+		aiNewsMu.Unlock()
+		return cached
+	}
+	aiNewsMu.Unlock()
+
+	url := fmt.Sprintf("%s?key=%s", tianapiAIURL, tianapiKey)
+	data, err := httpGet(url)
+	if err != nil {
+		log.Println("AI资讯请求失败:", err)
+		return nil
+	}
+
+	var resp aiNewsResp
+	if json.Unmarshal(data, &resp) != nil || resp.Code != 200 {
+		log.Println("AI资讯解析失败:", string(data[:min(len(data), 100)]))
+		return nil
+	}
+
+	var items []aiNewsItem
+	for _, n := range resp.Result.Newslist {
+		items = append(items, aiNewsItem{
+			Title:       n.Title,
+			Description: n.Description,
+			Source:      n.Source,
+			CTime:       n.CTime,
+			URL:         n.URL,
+			PicURL:      n.PicUrl,
+		})
+	}
+
+	aiNewsMu.Lock()
+	aiNewsCache = items
+	aiNewsCacheAt = time.Now()
+	aiNewsMu.Unlock()
+
+	// 缓存到文件
+	cacheData, _ := json.Marshal(map[string]interface{}{
+		"items": items,
+		"at":    time.Now().Format(time.RFC3339),
+	})
+	if err := os.WriteFile(aiNewsCachePath(), cacheData, 0644); err != nil {
+		log.Println("AI资讯缓存写入失败:", err)
+	}
+
+	log.Printf("AI资讯已获取: %d条", len(items))
+	return items
+}
+
+func loadAINewsCache() []aiNewsItem {
+	data, err := os.ReadFile(aiNewsCachePath())
+	if err != nil {
+		return nil
+	}
+	var cached struct {
+		Items []aiNewsItem `json:"items"`
+		At    string       `json:"at"`
+	}
+	if json.Unmarshal(data, &cached) != nil {
+		return nil
+	}
+	return cached.Items
+}
+
+func pushAINews(items []aiNewsItem) {
+	if len(items) == 0 {
+		return
+	}
+	jsonData, _ := json.Marshal(items)
+	js := fmt.Sprintf(`if(window.updateAINewsFromGo) window.updateAINewsFromGo(%s)`, string(jsonData))
+	evalJS(js)
+}
+
+func aiNewsLoop() {
+	cfg := loadConfig()
+	if cfg.HideAINews {
+		return
+	}
+
+	// 先推送缓存
+	if cached := loadAINewsCache(); cached != nil {
+		pushAINews(cached)
+	}
+
+	time.Sleep(8 * time.Second)
+
+	cfg = loadConfig()
+	if cfg.HideAINews {
+		return
+	}
+
+	items := fetchAINews()
+	if items != nil {
+		pushAINews(items)
+	}
+
+	ticker := time.NewTicker(2 * time.Hour)
+	for range ticker.C {
+		cfg := loadConfig()
+		if !cfg.HideAINews {
+			if items := fetchAINews(); items != nil {
+				pushAINews(items)
+			}
+		}
+	}
+}
+
+func triggerAINewsRefresh() {
+	go func() {
+		if items := fetchAINews(); items != nil {
+			pushAINews(items)
+		}
+	}()
+}