Simplify GUI settings and build flags

2026-06-26 09:16:46 +09:00
parent 4d77e67870
commit ae426244e0
22 changed files with 846 additions and 237 deletions
--- a/internal/app/app.go
+++ b/internal/app/app.go
@@ -10,6 +10,7 @@ import (

 	"vrc_osc_go/internal/config"
 	"vrc_osc_go/internal/consenttool"
+	"vrc_osc_go/internal/buildinfo"
 	"vrc_osc_go/internal/osc"
 )

@@ -18,17 +19,25 @@ type discordMuteState struct {
 	muted         bool
 	buttonPressed bool
 	lastAction    time.Time
+	lastPressEdge time.Time
 }

 func Run(configPath string, mode string) error {
 	if mode != "" {
 		return consenttool.Run(configPath, mode)
 	}
+	log.Printf("app run begin config=%s mode=%s", configPath, mode)
+	if err := setupRuntimeLogger(); err != nil {
+		return err
+	}
+	log.Printf("runtime logger ready")

 	cfg, err := config.Load(configPath)
 	if err != nil {
+		log.Printf("config load failed: %v", err)
 		return err
 	}
+	log.Printf("app version=%s build=%s", buildinfo.Version, buildinfo.BuildTime)
 	InitGuestTracker(NewGuestTracker(cfg.VrcLog.GuestNames))
 	log.Printf("vrc_osc_go starting osc=%s:%d config=%s", cfg.OSC.Host, cfg.OSC.Port, configPath)

@@ -52,14 +61,25 @@ func Run(configPath string, mode string) error {
 		}
 		return nil
 	})
+	server.Map("translation", func(_ string, args []osc.Value) error {
+		log.Printf("received translation args=%+v", args)
+		if err := runPythonTranslationFromLastOCR(); err != nil {
+			log.Printf("translation failed: %v", err)
+			return err
+		}
+		return nil
+	})

 	errCh := make(chan error, 1)
 	go func() {
 		log.Printf("osc server listening on %s:%d", cfg.OSC.Host, cfg.OSC.Port)
 		errCh <- server.Serve()
 	}()
+	log.Printf("starting vrchat log watcher")
 	go watchVrchatLog()
+	log.Printf("vrchat log watcher goroutine started")
 	startSelfMonitor(cfg, discordState)
+	log.Printf("self monitor started")

 	sigCh := make(chan os.Signal, 1)
 	signal.Notify(sigCh, os.Interrupt, syscall.SIGTERM)
--- a/internal/app/discord.go
+++ b/internal/app/discord.go
@@ -3,120 +3,87 @@ package app
 import (
 	"fmt"
 	"log"
-	"os/exec"
+	"strings"
+	"syscall"
+	"unsafe"
+)
+
+const (
+	vkControl = 0x11
+	vkShift   = 0x10
+	vkM       = 0x4D
+	keyUp     = 0x0002
+	swRestore = 9
 )

 func pressDiscordMuteHotkey() error {
-	script := `
-$ErrorActionPreference = "Stop"
+	user32 := syscall.NewLazyDLL("user32.dll")
+	enumWindows := user32.NewProc("EnumWindows")
+	getWindowTextW := user32.NewProc("GetWindowTextW")
+	isWindowVisible := user32.NewProc("IsWindowVisible")
+	setForegroundWindow := user32.NewProc("SetForegroundWindow")
+	showWindow := user32.NewProc("ShowWindow")
+	getWindowRect := user32.NewProc("GetWindowRect")
+	keybdEvent := user32.NewProc("keybd_event")
+	setCursorPos := user32.NewProc("SetCursorPos")
+	sleep := syscall.NewLazyDLL("kernel32.dll").NewProc("Sleep")

-Add-Type @"
-using System;
-using System.Runtime.InteropServices;
-public static class Win32 {
-  [StructLayout(LayoutKind.Sequential)]
-  public struct RECT {
-    public int Left;
-    public int Top;
-    public int Right;
-    public int Bottom;
-  }
-  [DllImport("user32.dll")]
-  public static extern bool GetWindowRect(IntPtr hWnd, out RECT lpRect);
-  [DllImport("user32.dll")]
-  public static extern bool SetCursorPos(int X, int Y);
-  [DllImport("user32.dll")]
-  public static extern void mouse_event(uint dwFlags, uint dx, uint dy, uint dwData, UIntPtr dwExtraInfo);
-}
-"@
-
-function Click-WindowCenter($p) {
-  if ($null -eq $p) { return }
-  $hWnd = [IntPtr]$p.MainWindowHandle
-  if ($hWnd -eq [IntPtr]::Zero) { return }
-
-  $rect = New-Object 'Win32+RECT'
-  if (-not [Win32]::GetWindowRect($hWnd, [ref]$rect)) { return }
-
-  $x = [int](($rect.Left + $rect.Right) / 2)
-  $y = [int](($rect.Top + $rect.Bottom) / 2)
-  [Win32]::SetCursorPos($x, $y) | Out-Null
-  Start-Sleep -Milliseconds 50
-  [Win32]::mouse_event(0x0002, 0, 0, 0, [UIntPtr]::Zero)
-  [Win32]::mouse_event(0x0004, 0, 0, 0, [UIntPtr]::Zero)
-  Start-Sleep -Milliseconds 100
-}
-
-function Get-DiscordWindows {
-  $windows = foreach ($p in Get-Process) {
-    $title = ($p.MainWindowTitle | Out-String).Trim()
-    if (-not $title) { continue }
-    if (-not $title.ToLower().Contains('discord')) { continue }
-    $p
-  }
-  if (-not $windows) { return @() }
-  return $windows
-}
-
-function Get-BestDiscordWindow {
-  $windows = Get-DiscordWindows
-  if (-not $windows -or $windows.Count -eq 0) { return $null }
-
-  $browserKeywords = @('google chrome', 'microsoft edge', 'mozilla firefox', 'brave', 'opera')
-  $ranked = $windows | Sort-Object {
-    $title = ($_.MainWindowTitle | Out-String).Trim().ToLower()
-    $score = 0
-    foreach ($keyword in $browserKeywords) {
-      if ($title.Contains($keyword)) { $score += 10 }
-    }
-    if ($title -match '^\(\d+\)\s*discord') { $score += 20 }
-    if ($title.Contains('discord')) { $score += 5 }
-    $score
-  } -Descending
-
-  return $ranked | Select-Object -First 1
-}
-
-function Get-VRChatWindow {
-  $windows = Get-Process | Where-Object {
-    $_.MainWindowTitle -and (
-      $_.MainWindowTitle -eq 'VRChat' -or $_.MainWindowTitle.ToLower().StartsWith('vrchat ')
-    )
-  }
-  if (-not $windows) { return $null }
-  return $windows | Sort-Object { $_.MainWindowHandle } -Descending | Select-Object -First 1
-}
-
-function Activate-Window($p) {
-  if ($null -eq $p) { return }
-  $wshell = New-Object -ComObject WScript.Shell
-  try { $null = $wshell.AppActivate($p.Id) } catch {}
-  Start-Sleep -Milliseconds 200
-  Click-WindowCenter $p
-}
-
-$discord = Get-BestDiscordWindow
-if ($null -eq $discord) { exit 2 }
-
-Activate-Window $discord
-$wshell = New-Object -ComObject WScript.Shell
-Start-Sleep -Milliseconds 200
-$wshell.SendKeys('^+m')
-Start-Sleep -Milliseconds 200
-
-$vrchat = Get-VRChatWindow
-if ($null -ne $vrchat) {
-  Activate-Window $vrchat
-}
-`
-
-	cmd := exec.Command("powershell", "-NoProfile", "-ExecutionPolicy", "Bypass", "-Command", script)
-	out, err := cmd.CombinedOutput()
-	if len(out) > 0 {
-		log.Printf("discord mute output: %s", string(out))
+	var target uintptr
+	cb := syscall.NewCallback(func(hwnd uintptr, lparam uintptr) uintptr {
+		vis, _, _ := isWindowVisible.Call(hwnd)
+		if vis == 0 {
+			return 1
+		}
+		buf := make([]uint16, 512)
+		n, _, _ := getWindowTextW.Call(hwnd, uintptr(unsafe.Pointer(&buf[0])), uintptr(len(buf)))
+		if n == 0 {
+			return 1
+		}
+		title := strings.ToLower(strings.TrimSpace(syscall.UTF16ToString(buf[:n])))
+		if !strings.Contains(title, "discord") {
+			return 1
+		}
+		target = hwnd
+		return 0
+	})
+	r1, _, err1 := enumWindows.Call(cb, 0)
+	if r1 == 0 && target == 0 {
+		return fmt.Errorf("discord window not found: %v", err1)
 	}
-	if err != nil {
-		return fmt.Errorf("discord mute failed: %w", err)
+	if target == 0 {
+		return fmt.Errorf("discord window not found")
 	}
+
+	showWindow.Call(target, swRestore)
+	setForegroundWindow.Call(target)
+	sleep.Call(150)
+
+	type rect struct {
+		Left   int32
+		Top    int32
+		Right  int32
+		Bottom int32
+	}
+	var r rect
+	if v, _, _ := getWindowRect.Call(target, uintptr(unsafe.Pointer(&r))); v != 0 {
+		x := int((r.Left + r.Right) / 2)
+		y := int((r.Top + r.Bottom) / 2)
+		setCursorPos.Call(uintptr(x), uintptr(y))
+		sleep.Call(50)
+	}
+
+	send := func(vk byte, flags uintptr) {
+		keybdEvent.Call(uintptr(vk), 0, flags, 0)
+	}
+	send(vkControl, 0)
+	send(vkShift, 0)
+	send(vkM, 0)
+	send(vkM, keyUp)
+	send(vkShift, keyUp)
+	send(vkControl, keyUp)
+	sleep.Call(100)
+
+	SetDiscordWindow("Discord")
+	log.Printf("discord hotkey sent via keybd_event")
 	return nil
 }
--- a/internal/app/discord_mute.go
+++ b/internal/app/discord_mute.go
@@ -30,33 +30,25 @@ func handleDiscordSend(state *discordMuteState, args []osc.Value) error {

 	if isPressed && !state.buttonPressed {
 		state.buttonPressed = true
-		if state.muted {
-			log.Printf("ACTION VRChat button pressed -> Discord unmute hotkey")
-			if err := pressDiscordMuteHotkey(); err != nil {
-				return err
-			}
-			state.muted = false
-			SetDiscordMuted(state.muted)
-			state.lastAction = now
+		log.Printf("ACTION VRChat button pressed -> Discord mute toggle")
+		if err := pressDiscordMuteHotkey(); err != nil {
+			log.Printf("discord hotkey failed: %v", err)
+			SetDiscordAction("hotkey_failed")
 		} else {
-			log.Printf("INFO already unmuted")
+			state.muted = !state.muted
+			SetDiscordMuted(state.muted)
+			if state.muted {
+				SetDiscordAction("muted")
+			} else {
+				SetDiscordAction("unmuted")
+			}
 		}
+		state.lastAction = now
 		return nil
 	}

 	if !isPressed && state.buttonPressed {
 		state.buttonPressed = false
-		if !state.muted {
-			log.Printf("ACTION VRChat button released -> Discord mute hotkey")
-			if err := pressDiscordMuteHotkey(); err != nil {
-				return err
-			}
-			state.muted = true
-			SetDiscordMuted(state.muted)
-			state.lastAction = now
-		} else {
-			log.Printf("INFO already muted")
-		}
 	}

 	return nil
--- a/internal/app/guest_status_test.go
+++ b/internal/app/guest_status_test.go
@@ -0,0 +1,58 @@
+package app
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+
+	"vrc_osc_go/internal/common"
+)
+
+func TestGuestTrackerJoinLeave(t *testing.T) {
+	base := t.TempDir()
+	prev := common.SetRootDirForTest(func() string { return base })
+	defer prev()
+
+	tracker := NewGuestTracker([]string{"Alice", "Bob"})
+	now := time.Date(2026, 6, 25, 12, 0, 0, 0, time.Local)
+
+	tracker.MarkJoin("Alice", now)
+	tracker.MarkJoin("Bob", now.Add(10*time.Second))
+
+	got := tracker.Snapshot(now.Add(20 * time.Second))
+	if len(got) != 2 {
+		t.Fatalf("expected 2 guests, got %d", len(got))
+	}
+
+	present := 0
+	for _, g := range got {
+		if g.Present {
+			present++
+		}
+	}
+	if present != 2 {
+		t.Fatalf("expected 2 present guests, got %#v", got)
+	}
+
+	tracker.MarkLeave("Alice", now.Add(30*time.Second))
+	got = tracker.Snapshot(now.Add(40 * time.Second))
+
+	var alice GuestStatus
+	for _, g := range got {
+		if g.Name == "Alice" {
+			alice = g
+		}
+	}
+	if alice.Present {
+		t.Fatalf("expected Alice to be absent, got %#v", alice)
+	}
+	if alice.AbsentFor == "" {
+		t.Fatalf("expected Alice absent duration, got %#v", alice)
+	}
+
+	snapshotPath := filepath.Join(base, "runtime", "guest_snapshot.json")
+	if _, err := os.Stat(snapshotPath); err != nil {
+		t.Fatalf("expected snapshot file: %v", err)
+	}
+}
--- a/internal/app/ocr.go
+++ b/internal/app/ocr.go
@@ -1,30 +1,128 @@
 package app

 import (
+	"encoding/json"
 	"fmt"
 	"log"
 	"os/exec"
+	"strings"
 )

-func runPythonOcrFromScreen() error {
-	script := `
-import sys
-from pathlib import Path
-root = Path(r"C:\Users\kenny\Documents\git\messpy\VRC\VRWT_Tool\VRC_OSC")
-sys.path.insert(0, str(root / "src"))
-from ocr.ocr_actions import runOcrFromScreen
-runOcrFromScreen()
-`
+type OcrResult struct {
+	ImagePath  string
+	TextPath   string
+	Text       string
+	Translate  string
+	ErrReason  string
+}
+
+func runPythonScript(script string) (string, error) {
 	cmd := exec.Command("python", "-c", script)
 	cmd.Dir = `C:\Users\kenny\Documents\git\messpy\VRC\VRWT_Tool\VRC_OSC`
 	out, err := cmd.CombinedOutput()
 	if len(out) > 0 {
-		log.Printf("ocr output: %s", string(out))
-		SetOCRText(string(out))
-		SetTranslateText("翻訳: 未実装")
+		log.Printf("python output: %s", string(out))
 	}
 	if err != nil {
-		return fmt.Errorf("ocr failed: %w", err)
+		return string(out), fmt.Errorf("python failed: %w", err)
+	}
+	return string(out), nil
+}
+
+func capturePythonOcr() (map[string]any, error) {
+	script := `
+import sys, json
+from pathlib import Path
+root = Path(r"C:\Users\kenny\Documents\git\messpy\VRC\VRWT_Tool\VRC_OSC")
+sys.path.insert(0, str(root / "src"))
+from ocr.ocr_actions import runOcrFromScreen
+result = runOcrFromScreen()
+print(json.dumps(result, ensure_ascii=False))
+`
+	out, err := runPythonScript(script)
+	if err != nil {
+		return nil, err
+	}
+	lines := strings.Split(strings.TrimSpace(out), "\n")
+	for i := len(lines) - 1; i >= 0; i-- {
+		line := strings.TrimSpace(lines[i])
+		if strings.HasPrefix(line, "{") && strings.HasSuffix(line, "}") {
+			var m map[string]any
+			if err := json.Unmarshal([]byte(line), &m); err == nil {
+				return m, nil
+			}
+		}
+	}
+	return nil, fmt.Errorf("ocr result json not found")
+}
+
+func runPythonOcrFromScreen() error {
+	log.Printf("ocr trigger begin")
+	result, err := capturePythonOcr()
+	if err != nil {
+		log.Printf("ocr trigger failed: %v", err)
+		SetOCRText("OCRテキストなし")
+		SetTranslateText("翻訳エンジン未設定")
+		_ = AppendRuntimeLog("OCR ERROR", err.Error())
+		return err
+	}
+	text, _ := result["text"].(string)
+	imagePath, _ := result["image_path"].(string)
+	textPath, _ := result["text_path"].(string)
+	if strings.TrimSpace(text) == "" {
+		text = "OCRテキストなし"
+	}
+	SetOCRText(text)
+	SetTranslateText("")
+	_ = AppendRuntimeLog("OCR INPUT", fmt.Sprintf("image=%s\n%s", imagePath, text))
+	if textPath != "" {
+		_ = AppendRuntimeLog("OCR TEXT", fmt.Sprintf("image=%s\ntext_path=%s\n%s", imagePath, textPath, text))
 	}
 	return nil
 }
+
+func runPythonTranslationFromLastOCR() error {
+	runtime := SnapshotRuntime()
+	source := strings.TrimSpace(runtime.LastOCRText)
+	if source == "" || source == "OCRテキストなし" {
+		SetTranslateText("OCRテキストなし")
+		_ = AppendRuntimeLog("TRANSLATION ERROR", "OCRテキストなし")
+		return nil
+	}
+
+	log.Printf("translation trigger begin")
+	SetTranslateText("翻訳実行中")
+	_ = AppendRuntimeLog("TRANSLATION INPUT", source)
+	script := `
+import sys, json
+from pathlib import Path
+root = Path(r"C:\Users\kenny\Documents\git\messpy\VRC\VRWT_Tool\VRC_OSC")
+sys.path.insert(0, str(root / "src"))
+from translate.translate_actions import translateTextToJapanese, saveTranslationText
+text = sys.argv[1]
+translated = translateTextToJapanese(text)
+print(translated or "")
+if translated:
+    saveTranslationText("runtime", translated)
+`
+	cmd := exec.Command("python", "-c", script, source)
+	cmd.Dir = `C:\Users\kenny\Documents\git\messpy\VRC\VRWT_Tool\VRC_OSC`
+	out, err := cmd.CombinedOutput()
+	if len(out) > 0 {
+		log.Printf("translation output: %s", string(out))
+	}
+	if err != nil {
+		SetTranslateText("翻訳失敗")
+		_ = AppendRuntimeLog("TRANSLATION ERROR", err.Error())
+		return err
+	}
+	translated := strings.TrimSpace(string(out))
+	if translated == "" {
+		SetTranslateText("翻訳結果なし")
+		_ = AppendRuntimeLog("TRANSLATION ERROR", "翻訳結果なし")
+		return nil
+	}
+	SetTranslateText(translated)
+	_ = AppendRuntimeLog("TRANSLATION RESULT", translated)
+	return nil
+}
--- a/internal/app/runtime.go
+++ b/internal/app/runtime.go
@@ -2,13 +2,45 @@ package app

 import (
 	"fmt"
+	"io"
+	"log"
 	"os"
 	"path/filepath"
+	"sync"
 	"time"

 	"vrc_osc_go/internal/common"
 )

+type runtimeLogWriter struct {
+	mu   sync.Mutex
+	file *os.File
+}
+
+func (w *runtimeLogWriter) Write(p []byte) (int, error) {
+	w.mu.Lock()
+	defer w.mu.Unlock()
+	if w.file == nil {
+		return len(p), nil
+	}
+	return w.file.Write(p)
+}
+
+func setupRuntimeLogger() error {
+	dir := filepath.Join(common.RootDir(), "runtime")
+	if err := os.MkdirAll(dir, 0o755); err != nil {
+		return err
+	}
+	path := filepath.Join(dir, "runtime.log")
+	f, err := os.OpenFile(path, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0o644)
+	if err != nil {
+		return err
+	}
+	logWriter := &runtimeLogWriter{file: f}
+	log.SetOutput(io.MultiWriter(os.Stderr, logWriter))
+	return nil
+}
+
 func appendRuntimeLog(title, text string) error {
 	dir := filepath.Join(common.RootDir(), "runtime")
 	if err := os.MkdirAll(dir, 0o755); err != nil {
@@ -50,3 +82,43 @@ func appendJoinLeaveLog(text string) error {
 	_, err = fmt.Fprintf(f, "\n[%s] VRC JOIN/LEAVE\n%s\n", time.Now().Format("2006-01-02 15:04:05"), body)
 	return err
 }
+
+func appendDesktopJoinLog(title, worldLabel, text string) error {
+	dir := filepath.Join(os.Getenv("USERPROFILE"), "Desktop")
+	if _, err := os.Stat(dir); err != nil {
+		if home, herr := os.UserHomeDir(); herr == nil {
+			dir = filepath.Join(home, "Desktop")
+		}
+	}
+	if err := os.MkdirAll(dir, 0o755); err != nil {
+		dir = filepath.Join(common.RootDir(), "runtime")
+		if mkErr := os.MkdirAll(dir, 0o755); mkErr != nil {
+			return err
+		}
+	}
+	path := filepath.Join(dir, "join.txt")
+	body := text
+	if body == "" {
+		body = "(empty)"
+	}
+	f, err := os.OpenFile(path, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0o644)
+	if err != nil {
+		fallbackDir := filepath.Join(common.RootDir(), "runtime")
+		if mkErr := os.MkdirAll(fallbackDir, 0o755); mkErr != nil {
+			return err
+		}
+		fallbackPath := filepath.Join(fallbackDir, "join.txt")
+		f, err = os.OpenFile(fallbackPath, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0o644)
+		if err != nil {
+			return err
+		}
+		path = fallbackPath
+	}
+	defer f.Close()
+	_, err = fmt.Fprintf(f, "%s\nWorld: %s\n\n%s\n", title, worldLabel, body)
+	return err
+}
+
+func AppendDesktopJoinLog(title, worldLabel, text string) error {
+	return appendDesktopJoinLog(title, worldLabel, text)
+}
--- a/internal/app/self_monitor.go
+++ b/internal/app/self_monitor.go
@@ -38,12 +38,15 @@ func startSelfMonitor(cfg *config.Config, state *discordMuteState) {
 				if nextState == "joined" {
 					if err := handleDiscordSend(state, []osc.Value{{Type: 'T', Bool: true}}); err != nil {
 						log.Printf("self monitor discord mute failed: %v", err)
+						SetDiscordSource("self_monitor_error")
 					}
 				} else if nextState == "left" {
 					if err := handleDiscordSend(state, []osc.Value{{Type: 'F', Bool: false}}); err != nil {
 						log.Printf("self monitor discord mute failed: %v", err)
+						SetDiscordSource("self_monitor_error")
 					}
 				}
+				SetDiscordSource("self_monitor")
 				lastState = nextState
 			}
 			time.Sleep(2 * time.Second)
--- a/internal/app/state.go
+++ b/internal/app/state.go
@@ -13,6 +13,9 @@ import (
 type RuntimeState struct {
 	mu             sync.RWMutex
 	DiscordMuted   bool
+	DiscordWindow  string
+	DiscordSource  string
+	DiscordAction  string
 	LastOCRText    string
 	LastTranslate  string
 	CurrentWorld   string
@@ -39,6 +42,27 @@ func SetDiscordMuted(v bool) {
 	_ = persistRuntimeState()
 }

+func SetDiscordWindow(v string) {
+	runtimeState.mu.Lock()
+	runtimeState.DiscordWindow = v
+	runtimeState.mu.Unlock()
+	_ = persistRuntimeState()
+}
+
+func SetDiscordSource(v string) {
+	runtimeState.mu.Lock()
+	runtimeState.DiscordSource = v
+	runtimeState.mu.Unlock()
+	_ = persistRuntimeState()
+}
+
+func SetDiscordAction(v string) {
+	runtimeState.mu.Lock()
+	runtimeState.DiscordAction = v
+	runtimeState.mu.Unlock()
+	_ = persistRuntimeState()
+}
+
 func SetOCRText(v string) {
 	runtimeState.mu.Lock()
 	runtimeState.LastOCRText = v
@@ -81,6 +105,9 @@ func persistRuntimeState() error {
 	enc.SetIndent("", "  ")
 	return enc.Encode(map[string]any{
 		"discord_muted": s.DiscordMuted,
+		"discord_window": s.DiscordWindow,
+		"discord_source": s.DiscordSource,
+		"discord_action": s.DiscordAction,
 		"ocr":           s.LastOCRText,
 		"translate":     s.LastTranslate,
 		"world":         s.CurrentWorld,
--- a/internal/app/vrc_log.go
+++ b/internal/app/vrc_log.go
@@ -1,7 +1,6 @@
 package app

 import (
-	"bufio"
 	"fmt"
 	"log"
 	"os"
@@ -9,6 +8,9 @@ import (
 	"regexp"
 	"strings"
 	"time"
+	"unicode/utf8"
+	"syscall"
+	"unsafe"
 )

 var (
@@ -77,6 +79,12 @@ func findLatestVrchatLog() (string, error) {
 }

 func watchVrchatLog() {
+	log.Printf("vrchat log watcher started")
+	defer func() {
+		if r := recover(); r != nil {
+			log.Printf("vrchat log watcher panic: %v", r)
+		}
+	}()
 	lastPath := ""
 	lastSize := int64(0)
 	state := &vrcLogState{
@@ -85,20 +93,26 @@ func watchVrchatLog() {
 	for {
 		path, err := findLatestVrchatLog()
 		if err != nil {
+			log.Printf("vrchat log not found: %v", err)
 			time.Sleep(2 * time.Second)
 			continue
 		}
 		info, err := os.Stat(path)
 		if err != nil {
+			log.Printf("vrchat log stat failed: %v", err)
 			time.Sleep(2 * time.Second)
 			continue
 		}
+		log.Printf("vrchat log loop path=%s size=%d last=%d", path, info.Size(), lastSize)
 		if path != lastPath {
 			log.Printf("vrchat log watching %s", path)
 			lastPath = path
 			lastSize = 0
+			log.Printf("vrchat log initial scan begin path=%s", path)
 			if err := scanExistingVrchatLog(path, state); err != nil {
 				log.Printf("vrchat log initial scan failed: %v", err)
+			} else {
+				log.Printf("vrchat log initial scan ok path=%s", path)
 			}
 			if info2, err := os.Stat(path); err == nil {
 				lastSize = info2.Size()
@@ -113,15 +127,22 @@ func watchVrchatLog() {
 			lastSize = 0
 		}
 		if info.Size() > lastSize {
-			f, err := os.Open(path)
+			log.Printf("vrchat log updated path=%s old=%d new=%d", path, lastSize, info.Size())
+			b, err := os.ReadFile(path)
 			if err != nil {
+				log.Printf("vrchat log read failed: %v", err)
 				time.Sleep(2 * time.Second)
 				continue
 			}
-			_, _ = f.Seek(lastSize, 0)
-			scanner := bufio.NewScanner(f)
-			for scanner.Scan() {
-				line := scanner.Text()
+			text := decodeVRChatLog(b)
+			lines := strings.Split(text, "\n")
+			joinHits := 0
+			leaveHits := 0
+			for _, line := range lines {
+				line = strings.TrimRight(line, "\r")
+				if line == "" {
+					continue
+				}
 				if err := appendRuntimeLog("VRC LOG", line); err != nil {
 					log.Printf("append runtime log failed: %v", err)
 				}
@@ -137,41 +158,47 @@ func watchVrchatLog() {
 				at := extractLineTime(line)
 				if m := joinPattern.FindStringSubmatch(line); len(m) == 2 {
 					name := strings.TrimSpace(m[1])
+					log.Printf("join detected: %s", name)
+					joinHits++
 					state.presentSet[name] = struct{}{}
 					if tracker := GetGuestTracker(); tracker != nil {
 						tracker.MarkJoin(name, at)
 					}
 					out := fmt.Sprintf("[join] %s (%d)", name, len(state.presentSet))
 					log.Print(out)
-					_ = appendJoinLeaveLog(out)
+					if err := appendJoinLeaveLog(out); err != nil {
+						log.Printf("append join log failed: %v", err)
+					}
 					continue
 				}
 				if m := leftPattern.FindStringSubmatch(line); len(m) == 2 {
 					name := strings.TrimSpace(m[1])
+					log.Printf("leave detected: %s", name)
+					leaveHits++
 					delete(state.presentSet, name)
 					if tracker := GetGuestTracker(); tracker != nil {
 						tracker.MarkLeave(name, at)
 					}
 					out := fmt.Sprintf("[leave] %s (%d)", name, len(state.presentSet))
 					log.Print(out)
-					_ = appendJoinLeaveLog(out)
+					if err := appendJoinLeaveLog(out); err != nil {
+						log.Printf("append leave log failed: %v", err)
+					}
 					continue
 				}
 			}
+			log.Printf("vrchat log batch done join=%d leave=%d", joinHits, leaveHits)
 			lastSize = info.Size()
-			_ = f.Close()
 		}
 		time.Sleep(2 * time.Second)
 	}
 }

 func scanExistingVrchatLog(path string, state *vrcLogState) error {
-	f, err := os.Open(path)
+	b, err := os.ReadFile(path)
 	if err != nil {
 		return err
 	}
-	defer f.Close()
-
 	state.presentSet = map[string]struct{}{}
 	state.location = ""
 	state.worldID = ""
@@ -180,9 +207,12 @@ func scanExistingVrchatLog(path string, state *vrcLogState) error {
 	state.pendingWorldName = ""
 	state.initialized = false

-	scanner := bufio.NewScanner(f)
-	for scanner.Scan() {
-		line := scanner.Text()
+	text := decodeVRChatLog(b)
+	for _, raw := range strings.Split(text, "\n") {
+		line := strings.TrimRight(raw, "\r")
+		if line == "" {
+			continue
+		}
 		if changed, _ := updateWorldState(state, line); changed {
 			state.presentSet = map[string]struct{}{}
 		}
@@ -203,9 +233,6 @@ func scanExistingVrchatLog(path string, state *vrcLogState) error {
 			continue
 		}
 	}
-	if err := scanner.Err(); err != nil {
-		return err
-	}
 	state.initialized = true
 	if state.worldName != "" {
 		log.Printf("world changed: %s", state.worldName)
@@ -213,11 +240,130 @@ func scanExistingVrchatLog(path string, state *vrcLogState) error {
 		if tracker := GetGuestTracker(); tracker != nil {
 			tracker.SetCurrentInstance(state.worldName)
 		}
-		_ = appendRuntimeLog("VRC WORLD", state.worldName)
+		if err := appendRuntimeLog("VRC WORLD", state.worldName); err != nil {
+			log.Printf("append world log failed: %v", err)
+		}
 	}
 	return nil
 }

+func decodeVRChatLog(b []byte) string {
+	if len(b) == 0 {
+		return ""
+	}
+	if utf8.Valid(b) {
+		return strings.TrimPrefix(string(b), "\ufeff")
+	}
+	if len(b) >= 2 {
+		if b[0] == 0xff && b[1] == 0xfe {
+			u16 := make([]uint16, 0, (len(b)-2)/2)
+			for i := 2; i+1 < len(b); i += 2 {
+				u16 = append(u16, uint16(b[i])|uint16(b[i+1])<<8)
+			}
+			return strings.TrimPrefix(fixMojibake(syscall.UTF16ToString(u16)), "\ufeff")
+		}
+		if b[0] == 0xfe && b[1] == 0xff {
+			u16 := make([]uint16, 0, (len(b)-2)/2)
+			for i := 2; i+1 < len(b); i += 2 {
+				u16 = append(u16, uint16(b[i+1])|uint16(b[i])<<8)
+			}
+			return strings.TrimPrefix(fixMojibake(syscall.UTF16ToString(u16)), "\ufeff")
+		}
+	}
+	for _, cp := range []uint32{932, 1252, 65001} {
+		if decoded := decodeWithCodePage(b, cp); decoded != "" {
+			return strings.TrimPrefix(fixMojibake(decoded), "\ufeff")
+		}
+	}
+	return strings.TrimPrefix(fixMojibake(string(b)), "\ufeff")
+}
+
+func DecodeVRChatLog(b []byte) string {
+	return decodeVRChatLog(b)
+}
+
+func fixMojibake(s string) string {
+	if s == "" {
+		return ""
+	}
+	candidates := []string{s}
+	if repaired := tryRepairShiftJISMojibake(s); repaired != "" {
+		candidates = append(candidates, repaired)
+	}
+	best := s
+	bestScore := scoreReadable(best)
+	for _, cand := range candidates {
+		if score := scoreReadable(cand); score > bestScore {
+			best = cand
+			bestScore = score
+		}
+	}
+	return best
+}
+
+func tryRepairShiftJISMojibake(s string) string {
+	raw := []byte(s)
+	// Try the common "UTF-8 bytes interpreted as CP932" pattern repair by
+	// round-tripping through CP932 in the reverse direction.
+	if repaired := decodeWithCodePage(raw, 932); repaired != "" && repaired != s {
+		return repaired
+	}
+	return ""
+}
+
+func scoreReadable(s string) int {
+	if s == "" {
+		return -1
+	}
+	score := 0
+	for _, r := range s {
+		switch {
+		case r == '<27>':
+			score -= 8
+		case r >= 0x3040 && r <= 0x30ff:
+			score += 3
+		case r >= 0x4e00 && r <= 0x9fff:
+			score += 3
+		case r >= 0x0020 && r <= 0x007e:
+			score += 1
+		case r == '\n' || r == '\r' || r == '\t':
+			score += 1
+		default:
+			score -= 1
+		}
+	}
+	return score
+}
+
+func decodeWithCodePage(b []byte, codePage uint32) string {
+	if len(b) == 0 {
+		return ""
+	}
+	kernel32 := syscall.NewLazyDLL("kernel32.dll")
+	multiByteToWideChar := kernel32.NewProc("MultiByteToWideChar")
+	n, _, _ := multiByteToWideChar.Call(
+		uintptr(codePage),
+		0,
+		uintptr(unsafe.Pointer(&b[0])),
+		uintptr(len(b)),
+		0,
+		0,
+	)
+	if n == 0 {
+		return ""
+	}
+	buf := make([]uint16, n)
+	multiByteToWideChar.Call(
+		uintptr(codePage),
+		0,
+		uintptr(unsafe.Pointer(&b[0])),
+		uintptr(len(b)),
+		uintptr(unsafe.Pointer(&buf[0])),
+		uintptr(len(buf)),
+	)
+	return syscall.UTF16ToString(buf)
+}
+
 func updateWorldState(state *vrcLogState, line string) (bool, string) {
 	worldID := ""
 	instanceID := ""