feat: init sproutclaw-web — Go+Gin backend + React frontend

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

backend/internal/config/config.go

@@ -0,0 +1,77 @@
+package config
+
+import (
+	"flag"
+	"os"
+	"path/filepath"
+	"runtime"
+)
+
+type Config struct {
+	Port     int
+	AgentDir string
+	PiCmd    string // pi CLI 启动命令（完整路径）
+	PiArgs   []string
+
+	// 派生路径（从 AgentDir 推导）
+	SessionsDir      string
+	SystemPromptFile string
+	ModelsConfigFile string
+	McpConfigFile    string
+	McpCacheFile     string
+	SettingsFile     string
+	SkillsDir        string
+	SkillsDisabledDir string
+	ExtensionsDir    string
+	FrontendDist     string // ../frontend/dist 相对于可执行文件
+}
+
+func New() *Config {
+	port := flag.Int("port", 19133, "HTTP port")
+	agentDir := flag.String("agent-dir", "", "pi agent directory (e.g. /path/to/.pi/agent)")
+	piCmd := flag.String("pi-cmd", "", "pi CLI executable path")
+	flag.Parse()
+
+	if *agentDir == "" {
+		// 默认值：当前目录的 .pi/agent
+		cwd, _ := os.Getwd()
+		*agentDir = filepath.Join(cwd, ".pi", "agent")
+	}
+
+	cfg := &Config{
+		Port:     *port,
+		AgentDir: *agentDir,
+		PiCmd:    *piCmd,
+	}
+	cfg.derivePaths()
+	return cfg
+}
+
+func (c *Config) derivePaths() {
+	a := c.AgentDir
+	c.SessionsDir = filepath.Join(a, "sessions")
+	c.SystemPromptFile = filepath.Join(a, "AGENTS.md")
+	c.ModelsConfigFile = filepath.Join(a, "models.json")
+	c.McpConfigFile = filepath.Join(a, "mcp.json")
+	c.McpCacheFile = filepath.Join(a, "mcp-cache.json")
+	c.SettingsFile = filepath.Join(a, "settings.json")
+	c.SkillsDir = filepath.Join(a, "skills")
+	c.SkillsDisabledDir = filepath.Join(a, "skills-disabled")
+	c.ExtensionsDir = filepath.Join(a, "extensions")
+
+	// frontend/dist 相对于二进制所在目录的上级
+	exe, err := os.Executable()
+	if err != nil {
+		exe, _ = os.Getwd()
+	}
+	exeDir := filepath.Dir(exe)
+	c.FrontendDist = filepath.Join(exeDir, "..", "frontend", "dist")
+}
+
+func Platform() string {
+	return runtime.GOOS
+}
+
+func Arch() string {
+	return runtime.GOARCH
+}