internal/checker+gui: remove voice-srv test (Discord doesn't expose regional voice servers via public DNS)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

internal/checker/checker.go

@@ -8,7 +8,6 @@ import (
 	"net/http"
 	"regexp"
 	"strconv"
-	"strings"
 	"time"
 )
 
@@ -63,13 +62,6 @@ type Config struct {
 	// packets, 20ms between sends.
 	VoiceBurstCount    int
 	VoiceBurstInterval time.Duration
-
-	// VoiceServerHostnames is the list of Discord voice-domain hostnames
-	// probed in the voice-srv test. Empty means "use the built-in 16-region
-	// default" (russia, russia2, frankfurt, europe, singapore, japan,
-	// us-east, us-west, brazil, india, hongkong, southkorea, sydney,
-	// southafrica, dubai, atlanta — all under .discord.media).
-	VoiceServerHostnames []string
 }
 
 // applyDefaults returns a copy of cfg with zero-valued knobs filled in.
@@ -107,9 +99,6 @@ func applyDefaults(cfg Config) Config {
 	if cfg.VoiceBurstInterval <= 0 {
 		cfg.VoiceBurstInterval = 20 * time.Millisecond
 	}
-	if len(cfg.VoiceServerHostnames) == 0 {
-		cfg.VoiceServerHostnames = defaultVoiceHostnames
-	}
 	return cfg
 }
 
@@ -135,7 +124,6 @@ func Run(ctx context.Context, cfg Config) <-chan Result {
 		e.runConnect()
 		e.runUDP()
 		e.runVoiceQuality()
-		e.runVoiceSrv()
 		e.runAPI()
 	}()
 
@@ -165,7 +153,7 @@ type executor struct {
 	udpClient net.PacketConn
 
 	// Step gating: each xOK is set true on success (or "soft pass"
-	// warn for voice-quality / voice-srv).
+	// warn for voice-quality).
 	tcpOK, greetOK, authOK, connectOK, udpOK, voiceQualityOK bool
 
 	// Cancellation latch. Once any test emits a "cancelled" failure,
@@ -761,97 +749,6 @@ func (e *executor) runVoiceQuality() {
 	}
 }
 
-// runVoiceSrv — Test 7: probe Discord voice-domain reachability through
-// the SOCKS5 proxy. Single attempt (DNS+connect bursts are slow and
-// idempotent — retry budget better spent on transient handshake steps).
-func (e *executor) runVoiceSrv() {
-	if e.shouldSkip("voice-srv", e.connectOK) {
-		return
-	}
-
-	attempt := 1
-	e.emit(Result{ID: "voice-srv", Status: StatusRunning, Attempt: attempt})
-	attemptCtx, cancel := context.WithTimeout(e.ctx, e.cfg.PerTestTimeout)
-	defer cancel()
-	start := time.Now()
-
-	// Per-host dial timeout — fits inside PerTestTimeout but isn't the
-	// whole budget (we run 8 in parallel, so total wall-clock is roughly
-	// ceil(N/8) * dialTimeout + DNS).
-	dialTimeout := e.cfg.PerTestTimeout / 4
-	if dialTimeout < 500*time.Millisecond {
-		dialTimeout = 500 * time.Millisecond
-	}
-
-	res, err := runVoiceServerProbe(
-		attemptCtx, e.cfg.VoiceServerHostnames, e.proxyAddr(),
-		e.cfg.UseAuth, e.cfg.ProxyLogin, e.cfg.ProxyPassword, dialTimeout,
-	)
-	dur := time.Since(start)
-
-	if err != nil {
-		if e.ctx.Err() != nil {
-			e.emitCancelled("voice-srv", attempt, dur)
-			return
-		}
-		e.emit(Result{
-			ID:       "voice-srv",
-			Status:   StatusFailed,
-			Error:    err.Error(),
-			Hint:     hintFor("voice-srv", err),
-			Attempt:  attempt,
-			Duration: dur,
-		})
-		return
-	}
-
-	if len(res.Resolved) == 0 {
-		e.emit(Result{
-			ID:       "voice-srv",
-			Status:   StatusFailed,
-			Error:    "no Discord voice domain resolved",
-			Hint:     "DNS не возвращает A-записи для *.discord.media — проверь системный DNS.",
-			Attempt:  attempt,
-			Duration: dur,
-		})
-		return
-	}
-
-	if len(res.Reachable) == 0 {
-		e.emit(Result{
-			ID:       "voice-srv",
-			Status:   StatusWarn,
-			Metric:   fmt.Sprintf("0/%d regions reachable", len(res.Resolved)),
-			Hint:     "Discord voice-домены резолвятся, но прокси не пропускает к ним TCP — голос с большой вероятностью не заработает.",
-			Attempt:  attempt,
-			Duration: dur,
-		})
-		return
-	}
-
-	// Top-3 region prefixes for the metric line.
-	top := res.Reachable
-	if len(top) > 3 {
-		top = top[:3]
-	}
-	prefixes := make([]string, 0, len(top))
-	for _, h := range top {
-		prefix := h
-		if i := strings.Index(h, ".discord.media"); i > 0 {
-			prefix = h[:i]
-		}
-		prefixes = append(prefixes, prefix)
-	}
-	metric := fmt.Sprintf("%d/%d regions: %s", len(res.Reachable), len(res.Resolved), strings.Join(prefixes, ", "))
-	e.emit(Result{
-		ID:       "voice-srv",
-		Status:   StatusPassed,
-		Metric:   metric,
-		Attempt:  attempt,
-		Duration: dur,
-	})
-}
-
 // runAPI — Test 7: HTTP GET Discord API gateway URL through the proxy.
 func (e *executor) runAPI() {
 	if e.shouldSkip("api", e.connectOK) {