feat: 重构为 Go Web 脚手架——在线图片识别 Web 服务 + vision-cli 独立工具

- Gin + config.yaml + SQLite 后端骨架，JWT 登录 + 管理员初始化
- web/ 原生单页：拖拽多图上传 → Agnes 免费识别 → 结果复制
- HTTP API：/api/v1/vision/analyze 免鉴权 + 令牌桶限流，支持程序直调
- cmd/vision-cli 独立 CLI 工具（复用 service 层，不依赖 Web 服务）
- build.bat / build.sh 构建脚本，移除 mcp-server
- 统一响应格式 {code, message, data}，CORS/JWT/限流中间件

Co-Authored-By: Claude <noreply@anthropic.com>

main.go

@@ -1,123 +1,65 @@
 package main
 
 import (
-	"flag"
+	"context"
+	"embed"
 	"fmt"
+	"log"
+	"net/http"
 	"os"
-	"path/filepath"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"vision-tool/internal/config"
+	"vision-tool/internal/database"
+	"vision-tool/internal/router"
 )
 
+//go:embed web
+var webFS embed.FS
+
 func main() {
-	// Command-line flags
-	var (
-		apiKey     string
-		configPath string
-		prompt     string
-		quiet      bool
-		noThink    bool
-		saveConfig bool
-	)
-
-	flag.StringVar(&apiKey, "apikey", "", "API key (or set AGNES_API_KEY env var)")
-	flag.StringVar(&configPath, "config", "", "Path to config.json file")
-	flag.StringVar(&prompt, "prompt", "", "Custom prompt for image analysis")
-	flag.BoolVar(&quiet, "q", false, "Quiet mode — only output the model's response text")
-	flag.BoolVar(&noThink, "no-think", false, "Disable thinking mode (faster, lower server load)")
-	flag.BoolVar(&saveConfig, "save-config", false, "Save the API key to config.json and exit")
-	provider := flag.String("provider", "agnes", "AI provider: agnes (default)")
-	flag.Parse()
-
-	// Handle --save-config: persist the key and exit
-	if saveConfig {
-		if apiKey == "" {
-			fmt.Fprintln(os.Stderr, "Error: --apikey is required with --save-config")
-			os.Exit(1)
-		}
-		if configPath == "" {
-			configPath = filepath.Join(getToolsDir(), "config.json")
-		}
-		if err := SaveConfigFile(configPath, apiKey); err != nil {
-			fmt.Fprintf(os.Stderr, "Failed to save config: %v\n", err)
-			os.Exit(1)
-		}
-		fmt.Printf("API key saved to %s\n", configPath)
-		return
-	}
-
-	// Load configuration
-	cfg, err := LoadConfig(apiKey, configPath)
+	// 1. 加载配置（config.yaml，可被环境变量覆盖）
+	cfg, err := config.Load("config.yaml")
 	if err != nil {
-		fmt.Fprintf(os.Stderr, "Error: %v\n", err)
-		os.Exit(1)
-	}
-
-	// Apply provider preset (respects user's custom model/baseURL in config)
-	cfg.ApplyProvider(*provider)
-
-	if !quiet {
-		fmt.Fprintf(os.Stderr, "Provider: %s | Model: %s | API key: %s\n",
-			cfg.Provider, cfg.Model, MaskKey(cfg.APIKey))
-	}
-
-	// Collect image paths from remaining args
-	imagePaths := flag.Args()
-	if len(imagePaths) == 0 {
-		fmt.Fprintln(os.Stderr, "Usage: vision-tool [flags] <image-file> [image-file2 ...]")
-		fmt.Fprintln(os.Stderr, "")
-		fmt.Fprintln(os.Stderr, "Flags:")
-		flag.PrintDefaults()
-		fmt.Fprintln(os.Stderr, "")
-		fmt.Fprintln(os.Stderr, "Examples:")
-		fmt.Fprintln(os.Stderr, "  vision-tool photo.jpg")
-		fmt.Fprintln(os.Stderr, `  vision-tool -prompt "这张图里有什么文字？" screenshot.png`)
-		fmt.Fprintln(os.Stderr, "  vision-tool -q img1.png img2.png")
-		fmt.Fprintln(os.Stderr, "  vision-tool --apikey YOUR_KEY photo.jpg")
-		fmt.Fprintln(os.Stderr, "  vision-tool --save-config --apikey YOUR_KEY")
-		os.Exit(1)
-	}
-
-	// Validate image files exist
-	for _, p := range imagePaths {
-		if _, err := os.Stat(p); os.IsNotExist(err) {
-			fmt.Fprintf(os.Stderr, "Error: file not found: %s\n", p)
-			os.Exit(1)
-		}
-	}
-
-	client := NewVisionClient(cfg, noThink)
-
-	if !quiet {
-		fmt.Fprintf(os.Stderr, "Analyzing %d image(s)...\n\n", len(imagePaths))
-	}
-
-	// Call the API
-	var resp *ChatResponse
-	if len(imagePaths) == 1 {
-		resp, err = client.AnalyzeImage(imagePaths[0], prompt)
-	} else {
-		resp, err = client.AnalyzeImages(imagePaths, prompt)
+		log.Fatalf("加载配置失败: %v", err)
 	}
 
+	// 2. 初始化数据库
+	db, err := database.Init(&cfg.Database)
 	if err != nil {
-		fmt.Fprintf(os.Stderr, "Error: %v\n", err)
-		os.Exit(1)
+		log.Fatalf("初始化数据库失败: %v", err)
 	}
 
-	// Output the result
-	if len(resp.Choices) > 0 {
-		fmt.Println(resp.Choices[0].Message.Content)
-	}
+	// 3. 构建路由（分层依赖注入）
+	r := router.Setup(cfg, db, webFS)
 
-	if resp.Usage != nil && !quiet {
-		fmt.Fprintf(os.Stderr, "\n---\nTokens: prompt=%d completion=%d total=%d\n",
-			resp.Usage.PromptTokens, resp.Usage.CompletionTokens, resp.Usage.TotalTokens)
+	// 4. 启动 HTTP 服务
+	srv := &http.Server{
+		Addr:    fmt.Sprintf(":%d", cfg.Server.Port),
+		Handler: r,
 	}
-}
-
-func getToolsDir() string {
-	exe, err := os.Executable()
-	if err != nil {
-		return "."
-	}
-	return filepath.Dir(exe)
+	go func() {
+		log.Printf("vision-tool 已启动: http://localhost:%d", cfg.Server.Port)
+		if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
+			log.Fatalf("服务启动失败: %v", err)
+		}
+	}()
+
+	// 5. 优雅关闭
+	quit := make(chan os.Signal, 1)
+	signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
+	<-quit
+	log.Println("正在关闭服务...")
+
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+	if err := srv.Shutdown(ctx); err != nil {
+		log.Printf("关闭异常: %v", err)
+	}
+	if sqlDB, err := db.DB(); err == nil {
+		sqlDB.Close()
+	}
+	log.Println("服务已退出")
 }