refactor: remove token-taken auto-switch logic

NFT hit is permanently disabled — all token IDs are equal mining
channels. No more "taken" status or auto-switching.

Author: clawplaza

internal/miner/loop.go

@@ -7,7 +7,6 @@ import (
 	"fmt"
 	"io"
 	"log/slog"
-	"math/rand"
 	"net/http"
 	"strconv"
 	"strings"
@@ -211,20 +210,6 @@ func (m *Miner) Run(ctx context.Context) error {
 			continue
 		}
 
-		// Handle token taken — auto-switch to a random available token and keep mining
-		if resp.IDStatus == "taken" {
-			oldToken := m.TokenID
-			// Pick a random token in [25, 1024] different from the current one
-			for m.TokenID == oldToken {
-				m.TokenID = 25 + rand.Intn(1000)
-			}
-			ts := time.Now().Format("15:04:05")
-			fmt.Printf(i18n.Tr("\n[%s] Token #%d is taken — auto-switching to #%d\n",
-				"\n[%s] Token #%d 已被占用，自动切换到 #%d\n"), ts, oldToken, m.TokenID)
-			m.emit("control", fmt.Sprintf("Token #%d taken, switched to #%d", oldToken, m.TokenID), nil)
-			continue
-		}
-
 		// Guard: catch unhandled server errors that shouldn't fall through to success.
 		if resp.ErrorCode() != "" {
 			slog.Warn("unhandled server error, retrying", "error", resp.ErrorCode(), "message", resp.ErrorMessage())