新增数据重置功能：管理员可一键清空所有行情数据，需输入确认文字防误操作

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

web/backend/internal/handlers/reset.go

@@ -0,0 +1,22 @@
+package handlers
+
+import (
+	"fmt"
+	"io"
+	"net/http"
+	"time"
+)
+
+func (d *Deps) AdminResetData(w http.ResponseWriter, r *http.Request) {
+	client := &http.Client{Timeout: 10 * time.Second}
+	resp, err := client.Post(d.TushareURL+"/api/v1/admin/reset-data", "application/json", nil)
+	if err != nil {
+		writeErr(w, http.StatusBadGateway, fmt.Sprintf("tushare service unavailable: %v", err))
+		return
+	}
+	defer resp.Body.Close()
+
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(resp.StatusCode)
+	_, _ = io.Copy(w, resp.Body)
+}