fix(chat-media): 修复聊天图片缓存降级并刷新当前会话媒体

- 优先使用更高质量的微信图片资源并回写本地缓存
- 图片接口返回 no-store，避免浏览器继续命中旧缓存
- 页面恢复前台时刷新当前会话媒体资源，并补充相关测试

desktop/scripts/installer-custom.nsh

@@ -1,6 +1,22 @@
 ; This file is included for both installer and uninstaller builds.
 ; Guard installer-only pages/functions to avoid "function not referenced" warnings
 ; when electron-builder compiles the standalone uninstaller.
+!define /ifndef WDA_DEFAULT_SETTINGS_PATH "$APPDATA\${APP_FILENAME}\desktop-settings.json"
+!define /ifndef WDA_DEFAULT_OUTPUT_DIR "$APPDATA\${APP_FILENAME}\output"
+!ifdef APP_PRODUCT_FILENAME
+!define /ifndef WDA_PRODUCT_SETTINGS_PATH "$APPDATA\${APP_PRODUCT_FILENAME}\desktop-settings.json"
+!define /ifndef WDA_PRODUCT_OUTPUT_DIR "$APPDATA\${APP_PRODUCT_FILENAME}\output"
+!else
+!define /ifndef WDA_PRODUCT_SETTINGS_PATH ""
+!define /ifndef WDA_PRODUCT_OUTPUT_DIR ""
+!endif
+!ifdef APP_PACKAGE_NAME
+!define /ifndef WDA_PACKAGE_SETTINGS_PATH "$APPDATA\${APP_PACKAGE_NAME}\desktop-settings.json"
+!define /ifndef WDA_PACKAGE_OUTPUT_DIR "$APPDATA\${APP_PACKAGE_NAME}\output"
+!else
+!define /ifndef WDA_PACKAGE_SETTINGS_PATH ""
+!define /ifndef WDA_PACKAGE_OUTPUT_DIR ""
+!endif
 !ifndef BUILD_UNINSTALLER
 !include nsDialogs.nsh
 !include LogicLib.nsh
@@ -13,6 +29,10 @@
 !define /ifndef MUI_DIRECTORYPAGE_TEXT_DESTINATION "安装位置："
 
 Var WDA_InstallDirPage
+Var WDA_OutputDirPage
+Var WDA_OutputDirInput
+Var WDA_OutputDirBrowseButton
+Var WDA_SelectedOutputDir
 
 !macro customInit
   ; Safety: older versions created an `output` junction inside the install directory that points to the
@@ -22,17 +42,10 @@ Var WDA_InstallDirPage
 !macroend
 
 !macro customInstall
-  ; Provide a safe, non-junction way for users to locate the real per-user output directory.
-  ; The actual data is NOT stored inside $INSTDIR (it is wiped on update/reinstall).
-  ; `open-output.cmd` uses %APPDATA% so it works for the current user.
-  FileOpen $0 "$INSTDIR\output-location.txt" w
-  FileWrite $0 "WeChatDataAnalysis output folder (per user):$\r$\n%APPDATA%\\${APP_PACKAGE_NAME}\\output$\r$\n"
-  FileClose $0
-
-  FileOpen $1 "$INSTDIR\open-output.cmd" w
-  ; NSIS escaping: use $\" to output a literal quote character into the .cmd file.
-  FileWrite $1 "@echo off$\r$\nexplorer $\"%APPDATA%\\${APP_PACKAGE_NAME}\\output$\"$\r$\n"
-  FileClose $1
+  ${If} $WDA_SelectedOutputDir == ""
+    Call WDA_InitOutputDirSelection
+  ${EndIf}
+  Call WDA_WritePendingOutputDirSetting
 !macroend
 
 Function WDA_RemoveLegacyOutputLink
@@ -47,9 +60,27 @@ FunctionEnd
   ; the final install location (includes the app sub-folder).
   !ifdef allowToChangeInstallationDirectory
     Page custom WDA_InstallDirPageCreate WDA_InstallDirPageLeave
+    Page custom WDA_OutputDirPageCreate WDA_OutputDirPageLeave
   !endif
 !macroend
 
+Function WDA_InitOutputDirSelection
+  StrCpy $WDA_SelectedOutputDir "${WDA_DEFAULT_OUTPUT_DIR}"
+  nsExec::ExecToStack '"$SYSDIR\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -ExecutionPolicy Bypass -Command "& { param([string] $$defaultSettingsPath, [string] $$defaultOutputPath, [string] $$legacySettingsPath1, [string] $$legacySettingsPath2) $$candidates = @($$defaultSettingsPath, $$legacySettingsPath1, $$legacySettingsPath2) | Where-Object { -not [string]::IsNullOrWhiteSpace($$_) } | Select-Object -Unique; $$settingsPath = $$defaultSettingsPath; foreach ($$candidate in $$candidates) { if (Test-Path -LiteralPath $$candidate) { $$settingsPath = $$candidate; break } }; $$result = $$defaultOutputPath; if (Test-Path -LiteralPath $$settingsPath) { try { $$json = Get-Content -LiteralPath $$settingsPath -Raw | ConvertFrom-Json; $$value = [string] $$json.pendingOutputDir; if ([string]::IsNullOrWhiteSpace($$value)) { $$value = [string] $$json.outputDir }; if ($$value -eq '''') { $$result = $$defaultOutputPath } elseif (-not [string]::IsNullOrWhiteSpace($$value)) { $$result = $$value } } catch {} }; [Console]::OutputEncoding = [System.Text.Encoding]::UTF8; [Console]::Write($$result) }" "${WDA_DEFAULT_SETTINGS_PATH}" "${WDA_DEFAULT_OUTPUT_DIR}" "${WDA_PRODUCT_SETTINGS_PATH}" "${WDA_PACKAGE_SETTINGS_PATH}"'
+  Pop $0
+  Pop $1
+  ${If} $0 == "0"
+  ${AndIf} $1 != ""
+    StrCpy $WDA_SelectedOutputDir "$1"
+  ${EndIf}
+FunctionEnd
+
+Function WDA_WritePendingOutputDirSetting
+  nsExec::ExecToStack '"$SYSDIR\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -ExecutionPolicy Bypass -Command "& { param([string] $$defaultSettingsPath, [string] $$defaultOutputPath, [string] $$selectedOutputPath, [string] $$legacySettingsPath1, [string] $$legacySettingsPath2) $$candidates = @($$defaultSettingsPath, $$legacySettingsPath1, $$legacySettingsPath2) | Where-Object { -not [string]::IsNullOrWhiteSpace($$_) } | Select-Object -Unique; $$sourceSettingsPath = $$defaultSettingsPath; foreach ($$candidate in $$candidates) { if (Test-Path -LiteralPath $$candidate) { $$sourceSettingsPath = $$candidate; break } }; if ([string]::IsNullOrWhiteSpace($$selectedOutputPath)) { $$selectedOutputPath = $$defaultOutputPath }; $$pending = if ([string]::Equals($$selectedOutputPath, $$defaultOutputPath, [System.StringComparison]::OrdinalIgnoreCase)) { '''' } else { $$selectedOutputPath }; $$obj = @{}; if (Test-Path -LiteralPath $$sourceSettingsPath) { try { $$existing = Get-Content -LiteralPath $$sourceSettingsPath -Raw | ConvertFrom-Json; if ($$null -ne $$existing) { $$existing.PSObject.Properties | ForEach-Object { $$obj[$$_.Name] = $$_.Value } } } catch {} }; $$obj[''pendingOutputDir''] = $$pending; $$dir = Split-Path -Parent $$defaultSettingsPath; New-Item -ItemType Directory -Force -Path $$dir | Out-Null; $$json = [PSCustomObject] $$obj | ConvertTo-Json -Depth 10; Set-Content -LiteralPath $$defaultSettingsPath -Value $$json -Encoding UTF8 }" "${WDA_DEFAULT_SETTINGS_PATH}" "${WDA_DEFAULT_OUTPUT_DIR}" "$WDA_SelectedOutputDir" "${WDA_PRODUCT_SETTINGS_PATH}" "${WDA_PACKAGE_SETTINGS_PATH}"'
+  Pop $0
+  Pop $1
+FunctionEnd
+
 Function WDA_EnsureAppSubDir
   ; Normalize $INSTDIR to always end with "\${APP_FILENAME}" (avoid cluttering a parent folder).
   StrCpy $0 "$INSTDIR"
@@ -105,6 +136,48 @@ FunctionEnd
 Function WDA_InstallDirPageLeave
 FunctionEnd
 
+Function WDA_OutputDirBrowse
+  nsDialogs::SelectFolderDialog "选择 output 目录" "$WDA_SelectedOutputDir"
+  Pop $0
+  ${If} $0 != error
+    StrCpy $WDA_SelectedOutputDir "$0"
+    ${NSD_SetText} $WDA_OutputDirInput "$0"
+  ${EndIf}
+FunctionEnd
+
+Function WDA_OutputDirPageCreate
+  Call WDA_InitOutputDirSelection
+
+  nsDialogs::Create 1018
+  Pop $WDA_OutputDirPage
+
+  ${If} $WDA_OutputDirPage == error
+    Abort
+  ${EndIf}
+
+  ${NSD_CreateLabel} 0u 0u 100% 24u "请选择 output 目录（保存解密数据库、导出内容、缓存、日志等）。"
+  Pop $0
+
+  ${NSD_CreateText} 0u 28u 78% 12u "$WDA_SelectedOutputDir"
+  Pop $WDA_OutputDirInput
+
+  ${NSD_CreateButton} 82% 27u 18% 14u "浏览..."
+  Pop $WDA_OutputDirBrowseButton
+  ${NSD_OnClick} $WDA_OutputDirBrowseButton WDA_OutputDirBrowse
+
+  ${NSD_CreateLabel} 0u 52u 100% 28u "安装器只记录你的选择；真正的数据迁移会在首次启动应用时执行。若目标目录已有内容，应用会阻止切换并提示处理。"
+  Pop $0
+
+  nsDialogs::Show
+FunctionEnd
+
+Function WDA_OutputDirPageLeave
+  ${NSD_GetText} $WDA_OutputDirInput $WDA_SelectedOutputDir
+  ${If} $WDA_SelectedOutputDir == ""
+    StrCpy $WDA_SelectedOutputDir "${WDA_DEFAULT_OUTPUT_DIR}"
+  ${EndIf}
+FunctionEnd
+
 !endif
 
 !ifdef BUILD_UNINSTALLER
@@ -177,6 +250,12 @@ FunctionEnd
         RMDir /r "$APPDATA\${APP_PACKAGE_NAME}"
       !endif
 
+      IfFileExists "$INSTDIR\output-location.path" 0 WDA_SkipCustomOutputDelete
+        nsExec::ExecToStack '"$SYSDIR\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -ExecutionPolicy Bypass -Command "& { param([string] $$pathFile, [string] $$defaultPath1, [string] $$defaultPath2, [string] $$defaultPath3) if (Test-Path -LiteralPath $$pathFile) { $$target = (Get-Content -LiteralPath $$pathFile -Raw).Trim(); $$defaults = @($$defaultPath1, $$defaultPath2, $$defaultPath3) | Where-Object { -not [string]::IsNullOrWhiteSpace($$_) }; $$isDefault = $$false; foreach ($$defaultPath in $$defaults) { if ([string]::Equals($$target, $$defaultPath, [System.StringComparison]::OrdinalIgnoreCase)) { $$isDefault = $$true; break } }; if (-not $$isDefault -and -not [string]::IsNullOrWhiteSpace($$target) -and (Test-Path -LiteralPath $$target)) { Remove-Item -LiteralPath $$target -Recurse -Force -ErrorAction SilentlyContinue } } }" "$INSTDIR\output-location.path" "${WDA_DEFAULT_OUTPUT_DIR}" "${WDA_PRODUCT_OUTPUT_DIR}" "${WDA_PACKAGE_OUTPUT_DIR}"'
+        Pop $0
+        Pop $1
+      WDA_SkipCustomOutputDelete:
+
       ${if} $installMode == "all"
         SetShellVarContext all
       ${endif}

desktop/src/main.cjs

@@ -21,6 +21,13 @@ const fs = require("fs");
 const http = require("http");
 const net = require("net");
 const path = require("path");
+const {
+  getDefaultOutputDirPath,
+  getEffectiveOutputDirPath,
+  migrateOutputDirectory,
+  normalizeDirectoryPath,
+  rollbackOutputDirectoryChange,
+} = require("./output-dir.cjs");
 
 const DEFAULT_BACKEND_HOST = String(process.env.WECHAT_TOOL_HOST || "127.0.0.1").trim() || "127.0.0.1";
 const DEFAULT_BACKEND_PORT = parsePort(process.env.WECHAT_TOOL_PORT) ?? 10392;
@@ -32,6 +39,7 @@ let tray = null;
 let isQuitting = false;
 let desktopSettings = null;
 let backendPortChangeInProgress = false;
+let outputDirChangeInProgress = false;
 
 const gotSingleInstanceLock = app.requestSingleInstanceLock();
 if (!gotSingleInstanceLock) {
@@ -216,9 +224,76 @@ function resolveDataDir() {
 }
 
 function getUserDataDir() {
-  // Backwards-compat: we historically used Electron's userData directory for runtime storage.
-  // Keep this name but resolve to the effective data dir (can be overridden via env).
-  return resolveDataDir();
+  try {
+    const dir = app.getPath("userData");
+    if (!dir) return null;
+    fs.mkdirSync(dir, { recursive: true });
+    return dir;
+  } catch {
+    return null;
+  }
+}
+
+function safeNormalizeDirectory(value) {
+  try {
+    return normalizeDirectoryPath(value || "");
+  } catch {
+    return "";
+  }
+}
+
+function getDefaultOutputDir() {
+  const dataDir = resolveDataDir();
+  if (!dataDir) return null;
+  try {
+    return getDefaultOutputDirPath(dataDir);
+  } catch {
+    return null;
+  }
+}
+
+function syncOutputDirEnv(nextDir) {
+  const normalized = safeNormalizeDirectory(nextDir);
+  if (normalized) process.env.WECHAT_TOOL_OUTPUT_DIR = normalized;
+  else delete process.env.WECHAT_TOOL_OUTPUT_DIR;
+}
+
+function normalizePendingOutputDirValue(value) {
+  if (value == null) return null;
+  const text = String(value).trim();
+  if (!text) return "";
+  try {
+    return normalizeDirectoryPath(text);
+  } catch {
+    return null;
+  }
+}
+
+function resolveOutputDir() {
+  const dataDir = resolveDataDir();
+  if (!dataDir) return null;
+
+  const envOutputDir = safeNormalizeDirectory(process.env.WECHAT_TOOL_OUTPUT_DIR || "");
+  const settingsOutputDir = app.isPackaged ? safeNormalizeDirectory(loadDesktopSettings()?.outputDir || "") : "";
+
+  let chosen = null;
+  try {
+    chosen = getEffectiveOutputDirPath({
+      dataDir,
+      envOutputDir,
+      settingsOutputDir,
+    });
+  } catch {
+    chosen = getDefaultOutputDir();
+  }
+  if (!chosen) return null;
+
+  try {
+    fs.mkdirSync(chosen, { recursive: true });
+  } catch {}
+
+  syncOutputDirEnv(chosen);
+  return chosen;
 }
 
 function sanitizeAccountName(account) {
@@ -261,7 +336,8 @@ function resolveAccountDirInOutput(account) {
   const dataDir = resolveDataDir();
   if (!dataDir) throw new Error("无法定位数据目录");
 
-  const outputDir = path.join(dataDir, "output");
+  const outputDir = resolveOutputDir();
+  if (!outputDir) throw new Error("无法定位 output 目录");
   const databasesDir = path.join(outputDir, "databases");
   const accountName = sanitizeAccountName(account);
 
@@ -311,8 +387,8 @@ function getAccountInfoFromDisk(account) {
   };
 }
 
-function removeAccountFromKeyStore(dataDir, accountName) {
-  const keyStorePath = path.join(dataDir, "output", "account_keys.json");
+function removeAccountFromKeyStore(outputDir, accountName) {
+  const keyStorePath = path.join(outputDir, "account_keys.json");
   try {
     if (!fs.existsSync(keyStorePath)) return false;
     const raw = fs.readFileSync(keyStorePath, { encoding: "utf8" });
@@ -328,7 +404,7 @@ function removeAccountFromKeyStore(dataDir, accountName) {
 }
 
 async function deleteAccountDataFromDisk(account) {
-  const { dataDir, outputDir, databasesDir, accountName, accountDir } = resolveAccountDirInOutput(account);
+  const { outputDir, databasesDir, accountName, accountDir } = resolveAccountDirInOutput(account);
   if (!fs.existsSync(accountDir) || !fs.statSync(accountDir).isDirectory()) {
     throw new Error("账号数据不存在");
   }
@@ -348,7 +424,7 @@ async function deleteAccountDataFromDisk(account) {
     } catch {}
 
     fs.rmSync(accountDir, { recursive: true, force: true });
-    const removedKeyCache = removeAccountFromKeyStore(dataDir, accountName);
+    const removedKeyCache = removeAccountFromKeyStore(outputDir, accountName);
     const accounts = listDecryptedAccountsOnDisk(databasesDir);
     result = {
       status: "success",
@@ -394,10 +470,8 @@ function ensureOutputLink() {
   if (!app.isPackaged) return;
 
   const exeDir = getExeDir();
-  const dataDir = resolveDataDir();
-  if (!exeDir || !dataDir) return;
-
-  const target = path.join(dataDir, "output");
+  const target = resolveOutputDir();
+  if (!exeDir || !target) return;
   const legacyLinkPath = path.join(exeDir, "output");
 
   // Ensure the real output dir exists.
@@ -443,6 +517,11 @@ function ensureOutputLink() {
     fs.writeFileSync(p, text, { encoding: "utf8" });
   } catch {}
 
+  try {
+    const p = path.join(exeDir, "output-location.path");
+    fs.writeFileSync(p, `${target}\n`, { encoding: "utf8" });
+  } catch {}
+
   try {
     const p = path.join(exeDir, "open-output.cmd");
     const text = `@echo off\r\nexplorer \"${target}\"\r\n`;
@@ -510,6 +589,12 @@ function loadDesktopSettings() {
     ignoredUpdateVersion: "",
     // Backend (FastAPI) listens on this port. Used in packaged builds.
     backendPort: DEFAULT_BACKEND_PORT,
+    // Custom output dir; empty string means use the default dataDir/output.
+    outputDir: "",
+    // Pending output dir written by the installer before the next app startup.
+    pendingOutputDir: null,
+    // Last startup/apply failure when changing output dir.
+    lastOutputDirError: "",
     // Tracks the packaged UI build so we can invalidate Chromium's HTTP cache
     // after upgrades without wiping user data/localStorage.
     lastSeenUiBuildId: "",
@@ -530,6 +615,12 @@ function loadDesktopSettings() {
     const parsed = JSON.parse(raw || "{}");
     desktopSettings = { ...defaults, ...(parsed && typeof parsed === "object" ? parsed : {}) };
     desktopSettings.backendPort = parsePort(desktopSettings.backendPort) ?? defaults.backendPort;
+    desktopSettings.outputDir = safeNormalizeDirectory(desktopSettings.outputDir || "");
+    desktopSettings.pendingOutputDir =
+      parsed && typeof parsed === "object" && Object.prototype.hasOwnProperty.call(parsed, "pendingOutputDir")
+        ? normalizePendingOutputDirValue(parsed.pendingOutputDir)
+        : defaults.pendingOutputDir;
+    desktopSettings.lastOutputDirError = String(desktopSettings.lastOutputDirError || "").trim();
   } catch (err) {
     desktopSettings = { ...defaults };
     logMain(`[main] failed to load settings: ${err?.message || err}`);
@@ -551,6 +642,82 @@ function persistDesktopSettings() {
   }
 }
 
+function snapshotOutputDirSettings() {
+  loadDesktopSettings();
+  return {
+    outputDir: desktopSettings.outputDir,
+    pendingOutputDir: desktopSettings.pendingOutputDir,
+    lastOutputDirError: desktopSettings.lastOutputDirError,
+  };
+}
+
+function restoreOutputDirSettings(snapshot) {
+  loadDesktopSettings();
+  desktopSettings.outputDir = safeNormalizeDirectory(snapshot?.outputDir || "");
+  desktopSettings.pendingOutputDir = normalizePendingOutputDirValue(snapshot?.pendingOutputDir);
+  desktopSettings.lastOutputDirError = String(snapshot?.lastOutputDirError || "").trim();
+  const effectiveOutputDir = desktopSettings.outputDir || getDefaultOutputDir() || "";
+  syncOutputDirEnv(effectiveOutputDir);
+  persistDesktopSettings();
+}
+
+function setOutputDirSetting(nextDir) {
+  loadDesktopSettings();
+  const defaultDir = getDefaultOutputDir();
+  const normalized = safeNormalizeDirectory(nextDir || "");
+  if (!normalized || (defaultDir && normalized === defaultDir)) {
+    desktopSettings.outputDir = "";
+  } else {
+    desktopSettings.outputDir = normalized;
+  }
+  syncOutputDirEnv(desktopSettings.outputDir || defaultDir || "");
+  persistDesktopSettings();
+  return desktopSettings.outputDir;
+}
+
+function setPendingOutputDirSetting(nextDir) {
+  loadDesktopSettings();
+  desktopSettings.pendingOutputDir = normalizePendingOutputDirValue(nextDir);
+  persistDesktopSettings();
+  return desktopSettings.pendingOutputDir;
+}
+
+function clearPendingOutputDirSetting() {
+  loadDesktopSettings();
+  desktopSettings.pendingOutputDir = null;
+  persistDesktopSettings();
+}
+
+function setOutputDirLastError(message) {
+  loadDesktopSettings();
+  desktopSettings.lastOutputDirError = String(message || "").trim();
+  persistDesktopSettings();
+  return desktopSettings.lastOutputDirError;
+}
+
+function getOutputDirInfo() {
+  loadDesktopSettings();
+  const defaultPath = getDefaultOutputDir() || "";
+  const currentPath = resolveOutputDir() || defaultPath;
+  const hasPending = desktopSettings.pendingOutputDir !== null;
+  const pendingPath =
+    desktopSettings.pendingOutputDir === null
+      ? ""
+      : desktopSettings.pendingOutputDir === ""
+        ? defaultPath
+        : safeNormalizeDirectory(desktopSettings.pendingOutputDir);
+  return {
+    path: currentPath || "",
+    defaultPath,
+    isDefault: !!currentPath && !!defaultPath && currentPath === defaultPath,
+    pendingPath,
+    hasPending,
+    lastError: String(desktopSettings.lastOutputDirError || "").trim(),
+    canChange: !!app.isPackaged,
+    changeUnavailableReason: app.isPackaged ? "" : "开发模式不支持界面修改 output 目录",
+  };
+}
+
 function getCloseBehavior() {
   const v = String(loadDesktopSettings()?.closeBehavior || "").trim().toLowerCase();
   return v === "exit" ? "exit" : "tray";
@@ -576,6 +743,137 @@ function setIgnoredUpdateVersion(version) {
   return desktopSettings.ignoredUpdateVersion;
 }
 
+async function applyOutputDirChange(nextValue) {
+  if (!app.isPackaged) {
+    throw new Error("开发模式不支持界面修改 output 目录");
+  }
+
+  const defaultPath = getDefaultOutputDir();
+  const currentPath = resolveOutputDir();
+  if (!defaultPath || !currentPath) {
+    throw new Error("无法定位 output 目录");
+  }
+
+  const rawText = String(nextValue ?? "").trim();
+  const nextPath = rawText ? normalizeDirectoryPath(rawText) : defaultPath;
+  const previousSettings = snapshotOutputDirSettings();
+
+  if (nextPath === currentPath) {
+    setOutputDirSetting(nextPath);
+    clearPendingOutputDirSetting();
+    setOutputDirLastError("");
+    ensureOutputLink();
+    const info = getOutputDirInfo();
+    return {
+      success: true,
+      changed: false,
+      path: info.path,
+      defaultPath: info.defaultPath,
+      isDefault: info.isDefault,
+      pendingPath: info.pendingPath,
+      backupPath: "",
+      sourceWasEmpty: false,
+      message: "output 目录未变化",
+    };
+  }
+
+  const wasBackendRunning = !!backendProc;
+  let migration = null;
+  let settingsSwitched = false;
+
+  try {
+    if (wasBackendRunning) {
+      await stopBackendAndWait({ timeoutMs: 10_000 });
+    }
+
+    migration = migrateOutputDirectory({
+      currentDir: currentPath,
+      nextDir: nextPath,
+    });
+
+    setOutputDirSetting(nextPath);
+    clearPendingOutputDirSetting();
+    setOutputDirLastError("");
+    settingsSwitched = true;
+    ensureOutputLink();
+
+    if (wasBackendRunning) {
+      startBackend();
+      await waitForBackend({ timeoutMs: 30_000 });
+    }
+
+    const info = getOutputDirInfo();
+    return {
+      success: true,
+      changed: true,
+      path: info.path,
+      defaultPath: info.defaultPath,
+      isDefault: info.isDefault,
+      pendingPath: info.pendingPath,
+      backupPath: migration?.backupDir || "",
+      sourceWasEmpty: !!migration?.sourceWasEmpty,
+      message: migration?.sourceWasEmpty ? "output 目录已切换" : "output 目录已迁移并切换",
+    };
+  } catch (err) {
+    const message = err?.message || String(err);
+    let rollbackMessage = "";
+    if (migration?.changed) {
+      try {
+        rollbackOutputDirectoryChange({
+          previousDir: currentPath,
+          currentDir: nextPath,
+          backupDir: migration.backupDir,
+          sourceWasEmpty: migration.sourceWasEmpty,
+        });
+      } catch (rollbackErr) {
+        logMain(`[main] output dir rollback failed: ${rollbackErr?.message || rollbackErr}`);
+        rollbackMessage = `；回滚失败：${rollbackErr?.message || rollbackErr}`;
+        if (migration?.backupDir) {
+          rollbackMessage += `；备份目录：${migration.backupDir}`;
+        }
+      }
+    }
+
+    if (settingsSwitched) {
+      restoreOutputDirSettings(previousSettings);
+    } else {
+      syncOutputDirEnv(currentPath);
+    }
+    ensureOutputLink();
+
+    if (wasBackendRunning) {
+      try {
+        startBackend();
+        await waitForBackend({ timeoutMs: 30_000 });
+      } catch (restartErr) {
+        throw new Error(
+          `切换 output 目录失败：${message}${rollbackMessage}；且旧后端恢复失败：${restartErr?.message || restartErr}`
+        );
+      }
+    }
+
+    if (rollbackMessage) {
+      throw new Error(`切换 output 目录失败：${message}${rollbackMessage}`);
+    }
+    throw err;
+  }
+}
+
+async function applyPendingOutputDirOnStartup() {
+  if (!app.isPackaged) return;
+  loadDesktopSettings();
+  if (desktopSettings.pendingOutputDir === null) return;
+
+  try {
+    await applyOutputDirChange(desktopSettings.pendingOutputDir);
+  } catch (err) {
+    clearPendingOutputDirSetting();
+    setOutputDirLastError(`安装时设置的 output 目录未能应用：${err?.message || err}`);
+    ensureOutputLink();
+    logMain(`[main] failed to apply pending output dir: ${err?.message || err}`);
+  }
+}
+
 async function refreshRendererCacheForPackagedUi() {
   if (!app.isPackaged) return;
 
@@ -1171,11 +1469,11 @@ function startBackend() {
   }
 
   if (app.isPackaged) {
-    if (!env.WECHAT_TOOL_DATA_DIR) {
-      env.WECHAT_TOOL_DATA_DIR = app.getPath("userData");
-    }
+    env.WECHAT_TOOL_DATA_DIR = resolveDataDir() || app.getPath("userData");
+    env.WECHAT_TOOL_OUTPUT_DIR = resolveOutputDir() || getDefaultOutputDir() || path.join(env.WECHAT_TOOL_DATA_DIR, "output");
     try {
       fs.mkdirSync(env.WECHAT_TOOL_DATA_DIR, { recursive: true });
+      fs.mkdirSync(env.WECHAT_TOOL_OUTPUT_DIR, { recursive: true });
     } catch {}
 
     const backendExe = getPackagedBackendPath();
@@ -1689,16 +1987,31 @@ function registerWindowIpc() {
     }
   });
 
+  ipcMain.handle("app:getOutputDirInfo", () => {
+    try {
+      return getOutputDirInfo();
+    } catch (err) {
+      logMain(`[main] app:getOutputDirInfo failed: ${err?.message || err}`);
+      return {
+        path: "",
+        defaultPath: "",
+        isDefault: true,
+        pendingPath: "",
+        hasPending: false,
+        lastError: err?.message || String(err),
+        canChange: !!app.isPackaged,
+        changeUnavailableReason: app.isPackaged ? "" : "开发模式不支持界面修改 output 目录",
+      };
+    }
+  });
+
   ipcMain.handle("app:getOutputDir", () => {
-    const dir = resolveDataDir();
-    if (!dir) return "";
-    return path.join(dir, "output");
+    return resolveOutputDir() || "";
   });
 
   ipcMain.handle("app:openOutputDir", async () => {
-    const dir = resolveDataDir();
-    if (!dir) throw new Error("无法定位数据目录");
-    const outDir = path.join(dir, "output");
+    const outDir = resolveOutputDir();
+    if (!outDir) throw new Error("无法定位 output 目录");
     try {
       fs.mkdirSync(outDir, { recursive: true });
     } catch {}
@@ -1713,6 +2026,28 @@ function registerWindowIpc() {
     }
   });
 
+  ipcMain.handle("app:setOutputDir", async (_event, nextDir) => {
+    if (outputDirChangeInProgress) {
+      return {
+        success: false,
+        error: "output 目录切换中，请稍后重试",
+      };
+    }
+    outputDirChangeInProgress = true;
+    try {
+      return await applyOutputDirChange(nextDir);
+    } catch (err) {
+      const message = err?.message || String(err);
+      logMain(`[main] app:setOutputDir failed: ${message}`);
+      return {
+        success: false,
+        error: message,
+      };
+    } finally {
+      outputDirChangeInProgress = false;
+    }
+  });
+
   ipcMain.handle("app:getAccountInfo", async (_event, account) => {
     try {
       return getAccountInfoFromDisk(account);
@@ -1796,6 +2131,8 @@ async function main() {
   // Resolve/create the data dir early so we can log reliably and place helper files
   // next to the installed exe for easier access.
   resolveDataDir();
+  loadDesktopSettings();
+  await applyPendingOutputDirOnStartup();
   ensureOutputLink();
   await ensureBackendPortAvailableOnStartup();
 
@@ -1876,10 +2213,20 @@ if (gotSingleInstanceLock) {
     stopBackend();
     try {
       const dir = getUserDataDir();
+      const outputDir = resolveOutputDir();
       if (dir) {
+        const detailLines = [
+          `启动失败：${err?.message || err}`,
+          "",
+          `桌面日志目录：${dir}`,
+          "文件：desktop-main.log / backend-stdio.log",
+        ];
+        if (outputDir) {
+          detailLines.push("", `当前 output 目录：${outputDir}`, "其中 output\\logs\\... 也在这里");
+        }
         dialog.showErrorBox(
           "WeChatDataAnalysis 启动失败",
-          `启动失败：${err?.message || err}\n\n请查看日志目录：\n${dir}\n\n文件：desktop-main.log / backend-stdio.log / output\\\\logs\\\\...`
+          detailLines.join("\n")
         );
         shell.openPath(dir);
       }

desktop/src/output-dir.cjs

@@ -0,0 +1,252 @@
+const fs = require("fs");
+const path = require("path");
+
+const SENTINEL_NAMES = [
+  "account_keys.json",
+  "runtime_settings.json",
+  "message_edits.db",
+  "databases",
+  "exports",
+  "logs",
+];
+
+function normalizeDirectoryPath(value) {
+  const text = String(value || "").trim();
+  if (!text) return "";
+  const expanded = text.replace(/^~(?=$|[\\/])/, process.env.USERPROFILE || process.env.HOME || "~");
+  if (!path.isAbsolute(expanded)) {
+    throw new Error("output 目录必须使用绝对路径");
+  }
+  return path.resolve(expanded);
+}
+
+function getDefaultOutputDirPath(dataDir) {
+  const base = normalizeDirectoryPath(dataDir);
+  if (!base) throw new Error("无法定位数据目录");
+  return path.join(base, "output");
+}
+
+function getEffectiveOutputDirPath({ dataDir, envOutputDir, settingsOutputDir }) {
+  const envPath = normalizeDirectoryPath(envOutputDir || "");
+  if (envPath) return envPath;
+
+  const settingsPath = normalizeDirectoryPath(settingsOutputDir || "");
+  if (settingsPath) return settingsPath;
+
+  return getDefaultOutputDirPath(dataDir);
+}
+
+function hasDirectoryContents(dirPath) {
+  try {
+    return fs.readdirSync(dirPath).length > 0;
+  } catch (err) {
+    if (err && err.code === "ENOENT") return false;
+    throw err;
+  }
+}
+
+function pathExists(dirPath) {
+  try {
+    fs.accessSync(dirPath);
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+function isDirectory(dirPath) {
+  try {
+    return fs.statSync(dirPath).isDirectory();
+  } catch {
+    return false;
+  }
+}
+
+function isPathInside(parentPath, candidatePath) {
+  const parent = path.resolve(parentPath);
+  const candidate = path.resolve(candidatePath);
+  if (parent === candidate) return false;
+  const relative = path.relative(parent, candidate);
+  return !!relative && !relative.startsWith("..") && !path.isAbsolute(relative);
+}
+
+function collectSentinels(sourceDir) {
+  const sentinels = [];
+  for (const name of SENTINEL_NAMES) {
+    const sourcePath = path.join(sourceDir, name);
+    if (!pathExists(sourcePath)) continue;
+    sentinels.push({
+      name,
+      isDir: isDirectory(sourcePath),
+      size: !isDirectory(sourcePath) ? fs.statSync(sourcePath).size : null,
+    });
+  }
+  return sentinels;
+}
+
+function verifyCopiedOutputTree(sourceDir, copiedDir) {
+  const sentinels = collectSentinels(sourceDir);
+  for (const item of sentinels) {
+    const copiedPath = path.join(copiedDir, item.name);
+    if (!pathExists(copiedPath)) {
+      throw new Error(`迁移校验失败：缺少 ${item.name}`);
+    }
+    if (item.isDir) {
+      if (!isDirectory(copiedPath)) {
+        throw new Error(`迁移校验失败：${item.name} 不是目录`);
+      }
+      continue;
+    }
+    const copiedStat = fs.statSync(copiedPath);
+    if (copiedStat.size !== item.size) {
+      throw new Error(`迁移校验失败：${item.name} 大小不一致`);
+    }
+  }
+}
+
+function makeTimestamp(now = new Date()) {
+  const parts = [
+    now.getFullYear(),
+    String(now.getMonth() + 1).padStart(2, "0"),
+    String(now.getDate()).padStart(2, "0"),
+    String(now.getHours()).padStart(2, "0"),
+    String(now.getMinutes()).padStart(2, "0"),
+    String(now.getSeconds()).padStart(2, "0"),
+  ];
+  return parts.join("");
+}
+
+function makeUniqueSiblingPath(basePath, suffix, now = new Date()) {
+  const stamp = makeTimestamp(now);
+  let attempt = 0;
+  while (true) {
+    const candidate = `${basePath}.${suffix}-${stamp}${attempt ? `-${attempt}` : ""}`;
+    if (!pathExists(candidate)) return candidate;
+    attempt += 1;
+  }
+}
+
+function ensureTargetIsUsable(targetDir) {
+  if (!pathExists(targetDir)) return;
+  if (!isDirectory(targetDir)) {
+    throw new Error("目标 output 路径已存在且不是目录");
+  }
+  if (hasDirectoryContents(targetDir)) {
+    throw new Error("目标 output 目录已有内容，请先清空后再重试");
+  }
+}
+
+function migrateOutputDirectory({ currentDir, nextDir, now = new Date() }) {
+  const currentPath = normalizeDirectoryPath(currentDir);
+  const targetPath = normalizeDirectoryPath(nextDir);
+  if (!currentPath || !targetPath) {
+    throw new Error("output 路径不能为空");
+  }
+  if (currentPath === targetPath) {
+    return {
+      changed: false,
+      currentDir: currentPath,
+      targetDir: targetPath,
+      sourceWasEmpty: !hasDirectoryContents(currentPath),
+      backupDir: "",
+    };
+  }
+  if (isPathInside(currentPath, targetPath) || isPathInside(targetPath, currentPath)) {
+    throw new Error("新旧 output 路径不能互相包含");
+  }
+
+  ensureTargetIsUsable(targetPath);
+
+  const sourceExists = pathExists(currentPath);
+  if (sourceExists && !isDirectory(currentPath)) {
+    throw new Error("当前 output 路径不是目录");
+  }
+  const sourceWasEmpty = !sourceExists || !hasDirectoryContents(currentPath);
+  if (sourceWasEmpty) {
+    fs.mkdirSync(targetPath, { recursive: true });
+    return {
+      changed: true,
+      currentDir: currentPath,
+      targetDir: targetPath,
+      sourceWasEmpty: true,
+      backupDir: "",
+    };
+  }
+
+  const tempTarget = makeUniqueSiblingPath(targetPath, "migrating", now);
+  const backupDir = makeUniqueSiblingPath(currentPath, "backup", now);
+
+  fs.cpSync(currentPath, tempTarget, {
+    recursive: true,
+    force: false,
+    errorOnExist: true,
+    preserveTimestamps: true,
+  });
+
+  try {
+    verifyCopiedOutputTree(currentPath, tempTarget);
+    if (pathExists(targetPath)) {
+      fs.rmSync(targetPath, { recursive: true, force: true });
+    }
+
+    fs.renameSync(currentPath, backupDir);
+    try {
+      fs.renameSync(tempTarget, targetPath);
+    } catch (err) {
+      try {
+        if (!pathExists(currentPath) && pathExists(backupDir)) {
+          fs.renameSync(backupDir, currentPath);
+        }
+      } catch {}
+      throw err;
+    }
+  } catch (err) {
+    try {
+      if (pathExists(tempTarget)) {
+        fs.rmSync(tempTarget, { recursive: true, force: true });
+      }
+    } catch {}
+    throw err;
+  }
+
+  return {
+    changed: true,
+    currentDir: currentPath,
+    targetDir: targetPath,
+    sourceWasEmpty: false,
+    backupDir,
+  };
+}
+
+function rollbackOutputDirectoryChange({ previousDir, currentDir, backupDir, sourceWasEmpty }) {
+  const previousPath = normalizeDirectoryPath(previousDir);
+  const currentPath = normalizeDirectoryPath(currentDir);
+
+  try {
+    if (currentPath && pathExists(currentPath)) {
+      fs.rmSync(currentPath, { recursive: true, force: true });
+    }
+  } catch {}
+
+  if (sourceWasEmpty) {
+    return;
+  }
+
+  const backupPath = normalizeDirectoryPath(backupDir);
+  if (!backupPath || !pathExists(backupPath)) return;
+
+  try {
+    if (!pathExists(previousPath)) {
+      fs.renameSync(backupPath, previousPath);
+    }
+  } catch {}
+}
+
+module.exports = {
+  getDefaultOutputDirPath,
+  getEffectiveOutputDirPath,
+  hasDirectoryContents,
+  migrateOutputDirectory,
+  normalizeDirectoryPath,
+  rollbackOutputDirectoryChange,
+};

desktop/src/preload.cjs

@@ -82,7 +82,9 @@ contextBridge.exposeInMainWorld("wechatDesktop", {
   chooseDirectory: (options = {}) => ipcRenderer.invoke("dialog:chooseDirectory", options),
 
   // Data/output folder helpers
+  getOutputDirInfo: () => ipcRenderer.invoke("app:getOutputDirInfo"),
   getOutputDir: () => ipcRenderer.invoke("app:getOutputDir"),
+  setOutputDir: (dir) => ipcRenderer.invoke("app:setOutputDir", String(dir ?? "")),
   openOutputDir: () => ipcRenderer.invoke("app:openOutputDir"),
   getAccountInfo: (account) => ipcRenderer.invoke("app:getAccountInfo", String(account || "")),
   deleteAccountData: (account) => ipcRenderer.invoke("app:deleteAccountData", String(account || "")),

desktop/tests/output-dir.test.cjs

@@ -0,0 +1,162 @@
+const test = require("node:test");
+const assert = require("node:assert/strict");
+const fs = require("fs");
+const os = require("os");
+const path = require("path");
+
+const {
+  getDefaultOutputDirPath,
+  getEffectiveOutputDirPath,
+  migrateOutputDirectory,
+  normalizeDirectoryPath,
+  rollbackOutputDirectoryChange,
+} = require("../src/output-dir.cjs");
+
+function makeTempDir() {
+  return fs.mkdtempSync(path.join(os.tmpdir(), "wda-output-"));
+}
+
+function cleanupDir(dirPath) {
+  try {
+    fs.rmSync(dirPath, { recursive: true, force: true });
+  } catch {}
+}
+
+test("normalizeDirectoryPath requires absolute paths", () => {
+  assert.throws(() => normalizeDirectoryPath("relative/path"), /绝对路径/);
+});
+
+test("getEffectiveOutputDirPath prefers env, then settings, then default", () => {
+  const root = makeTempDir();
+  const envDir = path.join(root, "env-output");
+  const settingsDir = path.join(root, "settings-output");
+  const defaultDir = path.join(root, "data", "output");
+
+  try {
+    assert.equal(
+      getEffectiveOutputDirPath({
+        dataDir: path.join(root, "data"),
+        envOutputDir: envDir,
+        settingsOutputDir: settingsDir,
+      }),
+      path.resolve(envDir)
+    );
+    assert.equal(
+      getEffectiveOutputDirPath({
+        dataDir: path.join(root, "data"),
+        envOutputDir: "",
+        settingsOutputDir: settingsDir,
+      }),
+      path.resolve(settingsDir)
+    );
+    assert.equal(getDefaultOutputDirPath(path.join(root, "data")), path.resolve(defaultDir));
+  } finally {
+    cleanupDir(root);
+  }
+});
+
+test("migrateOutputDirectory switches empty source to a new directory", () => {
+  const root = makeTempDir();
+  const currentDir = path.join(root, "current-output");
+  const nextDir = path.join(root, "custom-output");
+
+  try {
+    fs.mkdirSync(currentDir, { recursive: true });
+    const result = migrateOutputDirectory({ currentDir, nextDir });
+    assert.equal(result.changed, true);
+    assert.equal(result.sourceWasEmpty, true);
+    assert.equal(result.backupDir, "");
+    assert.ok(fs.existsSync(nextDir));
+    assert.equal(fs.existsSync(currentDir), true);
+  } finally {
+    cleanupDir(root);
+  }
+});
+
+test("migrateOutputDirectory blocks non-empty targets", () => {
+  const root = makeTempDir();
+  const currentDir = path.join(root, "current-output");
+  const nextDir = path.join(root, "custom-output");
+
+  try {
+    fs.mkdirSync(path.join(currentDir, "logs"), { recursive: true });
+    fs.writeFileSync(path.join(currentDir, "runtime_settings.json"), "{}");
+    fs.mkdirSync(nextDir, { recursive: true });
+    fs.writeFileSync(path.join(nextDir, "existing.txt"), "occupied");
+
+    assert.throws(
+      () => migrateOutputDirectory({ currentDir, nextDir }),
+      /已有内容/
+    );
+  } finally {
+    cleanupDir(root);
+  }
+});
+
+test("migrateOutputDirectory blocks invalid current paths", () => {
+  const root = makeTempDir();
+  const currentDir = path.join(root, "current-output");
+  const nextDir = path.join(root, "custom-output");
+
+  try {
+    fs.writeFileSync(currentDir, "not-a-directory");
+    assert.throws(
+      () => migrateOutputDirectory({ currentDir, nextDir }),
+      /不是目录/
+    );
+  } finally {
+    cleanupDir(root);
+  }
+});
+
+test("migrateOutputDirectory copies data and leaves the old directory as a backup", () => {
+  const root = makeTempDir();
+  const currentDir = path.join(root, "current-output");
+  const nextDir = path.join(root, "custom-output");
+
+  try {
+    fs.mkdirSync(path.join(currentDir, "databases", "wxid_test"), { recursive: true });
+    fs.writeFileSync(path.join(currentDir, "runtime_settings.json"), "{\"backend_port\":10392}");
+    fs.writeFileSync(path.join(currentDir, "databases", "wxid_test", "session.db"), "session");
+    fs.writeFileSync(path.join(currentDir, "databases", "wxid_test", "contact.db"), "contact");
+
+    const result = migrateOutputDirectory({ currentDir, nextDir, now: new Date("2026-03-30T08:00:00Z") });
+    assert.equal(result.changed, true);
+    assert.equal(result.sourceWasEmpty, false);
+    assert.match(path.basename(result.backupDir), /^current-output\.backup-\d{14}$/);
+    assert.ok(fs.existsSync(nextDir));
+    assert.ok(fs.existsSync(path.join(nextDir, "runtime_settings.json")));
+    assert.ok(fs.existsSync(path.join(nextDir, "databases", "wxid_test", "session.db")));
+    assert.ok(fs.existsSync(result.backupDir));
+    assert.equal(fs.existsSync(currentDir), false);
+  } finally {
+    cleanupDir(root);
+  }
+});
+
+test("rollbackOutputDirectoryChange restores the previous directory", () => {
+  const root = makeTempDir();
+  const previousDir = path.join(root, "current-output");
+  const currentDir = path.join(root, "custom-output");
+  const backupDir = path.join(root, "current-output.backup-20260330080100");
+
+  try {
+    fs.mkdirSync(path.join(currentDir, "databases"), { recursive: true });
+    fs.writeFileSync(path.join(currentDir, "databases", "temp.db"), "temp");
+    fs.mkdirSync(path.join(backupDir, "databases"), { recursive: true });
+    fs.writeFileSync(path.join(backupDir, "databases", "session.db"), "restored");
+
+    rollbackOutputDirectoryChange({
+      previousDir,
+      currentDir,
+      backupDir,
+      sourceWasEmpty: false,
+    });
+
+    assert.equal(fs.existsSync(currentDir), false);
+    assert.ok(fs.existsSync(path.join(previousDir, "databases", "session.db")));
+    assert.equal(fs.existsSync(backupDir), false);
+  } finally {
+    cleanupDir(root);
+  }
+});

frontend/components/BizMessages.vue

@@ -0,0 +1,394 @@
+<template>
+  <div class="biz-page h-full min-h-0 flex overflow-hidden" style="background-color: var(--app-shell-bg)">
+
+    <div :class="['w-[300px] lg:w-[320px] border-r flex flex-col flex-shrink-0 z-10', isDark ? 'bg-[#1e1e1e] border-[#333]' : 'bg-white border-gray-200']">
+      <div class="p-3 border-b" :class="isDark ? 'border-[#333]' : 'border-gray-200'" style="background-color: var(--app-surface-muted)">
+        <div class="contact-search-wrapper flex-1">
+          <input
+              v-model="searchQuery"
+              type="text"
+              class="contact-search-input"
+              placeholder="搜索服务号"
+          />
+        </div>
+      </div>
+
+      <div class="flex-1 overflow-y-auto min-h-0">
+        <div v-if="loadingAccounts" class="flex justify-center py-4">
+          <span class="text-sm" :class="isDark ? 'text-gray-500' : 'text-gray-400'">加载中...</span>
+        </div>
+        <div v-else class="pb-4">
+          <div
+              v-for="item in filteredAccounts"
+              :key="item.username"
+              @click="selectAccount(item)"
+              class="flex items-center gap-3 px-4 py-3 cursor-pointer transition-colors border-b"
+              :class="[
+                isDark ? 'border-[#333]' : 'border-gray-50',
+                selectedBizAccount?.username === item.username
+                  ? (isDark ? 'bg-[#333]' : 'bg-[#E5E5E5]') // 选中状态
+                  : item.username === 'gh_3dfda90e39d6'
+                    ? (isDark ? 'bg-[#2a2a2a] hover:bg-[#333]' : 'bg-[#F2F2F2] hover:bg-[#EAEAEA]') // 微信支付专门的底色
+                    : (isDark ? 'hover:bg-[#252525]' : 'hover:bg-gray-50') // 普通悬浮色
+              ]"
+          >
+            <img v-if="item.avatar" :src="api.getBizProxyImageUrl(item.avatar)" :class="['w-10 h-10 rounded-md object-cover flex-shrink-0', isDark ? 'bg-[#333]' : 'bg-gray-200']" alt=""/>
+            <div v-else class="w-10 h-10 rounded-md bg-[#03C160] text-white flex items-center justify-center text-lg font-medium flex-shrink-0 shadow-sm">
+              {{ (item.name || item.username).charAt(0).toUpperCase() }}
+            </div>
+
+            <div class="flex-1 min-w-0 flex flex-col justify-center gap-0.5">
+              <div class="flex justify-between items-center">
+                <h3 class="text-sm truncate" :class="isDark ? 'text-gray-100' : 'text-gray-900'">{{ item.name || item.username }}</h3>
+                <span v-if="item.formatted_last_time" class="text-[11px] flex-shrink-0 ml-2" :class="isDark ? 'text-gray-500' : 'text-gray-400'">
+                  {{ item.formatted_last_time }}
+                </span>
+              </div>
+
+              <div
+                  class="text-[10px] px-1.5 py-0.5 rounded w-max mt-0.5"
+                  :class="[
+                      item.type === 1 ? (isDark ? 'text-[#03C160] bg-[#03C160]/20' : 'text-[#03C160] bg-[#03C160]/10') : // 服务号
+                      item.type === 0 ? (isDark ? 'text-blue-400 bg-blue-900/40' : 'text-blue-500 bg-blue-50') :         // 公众号
+                      item.type === 2 ? (isDark ? 'text-orange-400 bg-orange-900/40' : 'text-orange-500 bg-orange-50') : // 企业号
+                                        (isDark ? 'text-gray-400 bg-gray-700/50' : 'text-gray-400 bg-gray-100')          // 未知
+                  ]"
+              >
+                {{ {1: '服务号', 0: '公众号', 2: '企业号', 3: '未知'}[item.type] || '未知' }}
+              </div>
+            </div>
+          </div>
+        </div>
+      </div>
+    </div>
+
+    <div class="flex-1 flex flex-col min-h-0 min-w-0" :class="isDark ? 'bg-[#121212]' : 'bg-[#F5F5F5]'">
+      <div v-if="selectedBizAccount" class="flex-1 flex flex-col min-h-0 relative">
+        <div class="h-14 border-b flex items-center px-5 shrink-0 z-10" :class="isDark ? 'bg-[#121212] border-[#333]' : 'bg-[#F5F5F5] border-gray-200'">
+          <h2 class="text-base" :class="isDark ? 'text-gray-100' : 'text-gray-900'">{{ selectedBizAccount.name }}</h2>
+        </div>
+
+        <div class="flex-1 overflow-y-auto px-4 py-6 flex flex-col-reverse" @scroll="handleScroll" ref="messageListRef">
+          <div class="h-4 shrink-0" aria-hidden="true"></div>
+          <div v-if="!hasMore" class="text-center text-xs py-4 w-full" :class="isDark ? 'text-gray-500' : 'text-gray-400'">没有更多消息了</div>
+          <div v-if="loadingMessages" class="text-center text-xs py-4 w-full" :class="isDark ? 'text-gray-500' : 'text-gray-400'">正在加载...</div>
+
+          <div class="w-full max-w-[400px] mx-auto flex flex-col-reverse gap-6">
+            <div v-for="msg in messages" :key="msg.local_id" class="w-full">
+
+              <div v-if="selectedBizAccount.username === 'gh_3dfda90e39d6'" class="rounded-xl shadow-sm p-5 border" :class="isDark ? 'bg-[#1e1e1e] border-[#333]' : 'bg-white border-gray-100'">
+                <div class="flex items-center text-sm mb-5" :class="isDark ? 'text-gray-400' : 'text-gray-500'">
+                  <img v-if="msg.merchant_icon" :src="api.getBizProxyImageUrl(msg.merchant_icon)" class="w-6 h-6 rounded-full mr-2 object-cover"  alt=""/>
+                  <div v-else class="w-6 h-6 rounded-full mr-2 flex items-center justify-center" :class="isDark ? 'bg-green-900/40 text-green-400' : 'bg-green-100 text-green-600'">¥</div>
+                  <span>{{ msg.merchant_name || '微信支付' }}</span>
+                </div>
+                <div class="text-center mb-6">
+                  <h3 class="text-[22px] font-medium mb-1" :class="isDark ? 'text-gray-100' : 'text-gray-900'">{{ msg.title }}</h3>
+                </div>
+                <div class="text-[13px] whitespace-pre-wrap leading-relaxed" :class="isDark ? 'text-gray-400' : 'text-gray-500'">
+                  {{ msg.description }}
+                </div>
+                <div class="mt-4 pt-3 border-t text-[12px] text-right" :class="isDark ? 'border-[#333] text-gray-500' : 'border-gray-100 text-gray-400'">
+                  {{ msg.formatted_time }}
+                </div>
+              </div>
+
+              <div v-else class="rounded-xl shadow-sm overflow-hidden border" :class="isDark ? 'bg-[#1e1e1e] border-[#333]' : 'bg-white border-gray-100'">
+                <a :href="msg.url" target="_blank" class="block relative group cursor-pointer">
+                  <img :src="msg.cover ? api.getBizProxyImageUrl(msg.cover) : defaultImage" :class="['w-full h-[180px] object-cover', isDark ? 'bg-[#333]' : 'bg-gray-100']"  alt=""/>
+                  <div class="absolute bottom-0 left-0 right-0 bg-gradient-to-t from-black/80 to-transparent p-3 pt-8">
+                    <h3 class="text-white text-[15px] font-medium leading-snug line-clamp-2 group-hover:underline">
+                      {{ msg.title }}
+                    </h3>
+                  </div>
+                </a>
+
+                <div v-if="msg.des" class="px-4 py-3 text-[13px] border-b" :class="isDark ? 'text-gray-400 border-[#333]' : 'text-gray-500 border-gray-50'">
+                  {{ msg.des }}
+                </div>
+
+                <div v-if="msg.content_list && msg.content_list.length > 1" class="flex flex-col">
+                  <a
+                      v-for="(item, idx) in msg.content_list.slice(1)"
+                      :key="idx"
+                      :href="item.url"
+                      target="_blank"
+                      class="flex items-center justify-between p-3 border-t hover:bg-opacity-50 cursor-pointer group"
+                      :class="isDark ? 'border-[#333] hover:bg-[#252525]' : 'border-gray-100 hover:bg-gray-50'"
+                  >
+                    <span class="text-[14px] leading-snug line-clamp-2 pr-3 group-hover:underline" :class="isDark ? 'text-gray-200' : 'text-gray-800'">
+                      {{ item.title }}
+                    </span>
+                    <img :src="item.cover ? api.getBizProxyImageUrl(item.cover) : defaultImage" :class="['w-12 h-12 rounded object-cover flex-shrink-0 border', isDark ? 'bg-[#333] border-[#444]' : 'bg-gray-100 border-gray-100']"  alt=""/>
+                  </a>
+                </div>
+              </div>
+
+            </div>
+          </div>
+        </div>
+      </div>
+
+      <div v-else class="flex-1 flex items-center justify-center">
+        <div class="text-center">
+          <div class="w-20 h-20 mx-auto mb-5 rounded-2xl flex items-center justify-center" :class="isDark ? 'bg-[#2a2a2a]' : 'bg-gray-200/50'">
+            <svg class="w-10 h-10" :class="isDark ? 'text-gray-600' : 'text-gray-400'" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+              <path stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5" d="M19 20H5a2 2 0 01-2-2V6a2 2 0 012-2h10a2 2 0 012 2v1m2 13a2 2 0 01-2-2V7m2 13a2 2 0 002-2V9.5L18.5 7H20" />
+            </svg>
+          </div>
+          <p class="text-sm" :class="isDark ? 'text-gray-500' : 'text-gray-400'">请选择一个服务号查看消息</p>
+        </div>
+      </div>
+    </div>
+  </div>
+</template>
+
+<script setup>
+import { ref, computed, onMounted, watch } from 'vue'
+
+import { useApi } from '~/composables/useApi'
+const api = useApi()
+
+import { storeToRefs } from 'pinia'
+import { useThemeStore } from '~/stores/theme'
+import { useChatAccountsStore } from '~/stores/chatAccounts'
+import { useChatRealtimeStore } from '~/stores/chatRealtime'
+
+const accounts = ref([])
+const loadingAccounts = ref(false)
+const searchQuery = ref('')
+const selectedBizAccount = ref(null)
+
+const themeStore = useThemeStore()
+const chatAccountsStore = useChatAccountsStore()
+const realtimeStore = useChatRealtimeStore()
+const { isDark } = storeToRefs(themeStore)
+const { selectedAccount: selectedDbAccount } = storeToRefs(chatAccountsStore)
+const { enabled: realtimeEnabled, changeSeq } = storeToRefs(realtimeStore)
+
+const messages = ref([])
+const loadingMessages = ref(false)
+const offset = ref(0)
+const limit = 20
+const hasMore = ref(true)
+
+const messageListRef = ref(null)
+let realtimeRefreshFuture = null
+let realtimeRefreshQueued = false
+
+// 默认占位图
+// const defaultAvatar = 'data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI0MCIgaGVpZ2h0PSI0MCIgdmlld0JveD0iMCAwIDQwIDQwIj48cmVjdCB3aWR0aD0iNDAiIGhlaWdodD0iNDAiIGZpbGw9IiNlNWU3ZWIiLz48L3N2Zz4='
+const defaultImage = 'data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI0MDAiIGhlaWdodD0iMTgwIj48cmVjdCB3aWR0aD0iNDAwIiBoZWlnaHQ9IjE4MCIgZmlsbD0iI2Y1ZjVmNSIvPjwvc3ZnPg=='
+
+const getCurrentAccountParam = () => {
+  const account = String(selectedDbAccount.value || '').trim()
+  return account || undefined
+}
+
+const resetMessagesState = () => {
+  messages.value = []
+  offset.value = 0
+  hasMore.value = true
+}
+
+const fetchAccounts = async ({ preserveSelection = true } = {}) => {
+  loadingAccounts.value = true
+  const previousUsername = preserveSelection ? String(selectedBizAccount.value?.username || '').trim() : ''
+  try {
+    const res = await api.listBizAccounts({ account: getCurrentAccountParam() })
+    const nextAccounts = Array.isArray(res?.data) ? res.data : []
+    accounts.value = nextAccounts
+
+    if (previousUsername) {
+      selectedBizAccount.value = nextAccounts.find(item => item.username === previousUsername) || null
+    } else if (!selectedBizAccount.value?.username) {
+      selectedBizAccount.value = null
+    }
+  } catch (err) {
+    accounts.value = []
+    selectedBizAccount.value = null
+    console.error('获取服务号失败:', err)
+  } finally {
+    loadingAccounts.value = false
+  }
+}
+
+// 搜索过滤
+const filteredAccounts = computed(() => {
+  if (!searchQuery.value) return accounts.value
+  const q = searchQuery.value.toLowerCase()
+  return accounts.value.filter(a =>
+      (a.name && a.name.toLowerCase().includes(q)) ||
+      (a.username && a.username.toLowerCase().includes(q))
+  )
+})
+
+// 点击选择服务号
+const selectAccount = async (account) => {
+  if (selectedBizAccount.value?.username === account.username) return
+  selectedBizAccount.value = account
+
+  // 重置消息状态
+  resetMessagesState()
+
+  await loadMessages()
+}
+
+// 加载消息
+const loadMessages = async () => {
+  if (loadingMessages.value || !hasMore.value || !selectedBizAccount.value) return
+
+  loadingMessages.value = true
+  try {
+    const username = selectedBizAccount.value.username
+    const params = {
+      account: getCurrentAccountParam(),
+      username,
+      offset: offset.value,
+      limit,
+    }
+
+    let res
+    if (username === 'gh_3dfda90e39d6') {
+      res = await api.listBizPayRecords(params)
+    } else {
+      res = await api.listBizMessages(params)
+    }
+
+    if (res && res.data) {
+      if (res.data.length < limit) {
+        hasMore.value = false
+      }
+      // 追加数据
+      messages.value.push(...res.data)
+      offset.value += limit
+    }
+  } catch (err) {
+    console.error('加载消息失败:', err)
+  } finally {
+    loadingMessages.value = false
+  }
+}
+
+const reloadSelectedMessages = async () => {
+  if (!selectedBizAccount.value) return
+  resetMessagesState()
+  await loadMessages()
+}
+
+const syncAllBizRealtime = async ({ forceReload = false } = {}) => {
+  const priorityUsername = String(selectedBizAccount.value?.username || '').trim()
+  if (!realtimeEnabled.value) {
+    if (forceReload) {
+      await reloadSelectedMessages()
+    }
+    return
+  }
+
+  try {
+    const result = await api.syncChatRealtimeAll({
+      account: getCurrentAccountParam(),
+      max_scan: 200,
+      priority_username: priorityUsername,
+      priority_max_scan: 400,
+      include_hidden: true,
+      include_official: true,
+      only_official: true,
+      backfill_limit: 0,
+    })
+    const hasDelta = Number(result?.insertedTotal || 0) > 0 || Number(result?.sessionsUpdated || 0) > 0
+    await fetchAccounts({ preserveSelection: true })
+    if (selectedBizAccount.value?.username) {
+      if (hasDelta || forceReload) {
+        await reloadSelectedMessages()
+      }
+    } else if (forceReload) {
+      resetMessagesState()
+    }
+  } catch (err) {
+    console.error('实时同步服务号失败:', err)
+    if (forceReload) {
+      await fetchAccounts({ preserveSelection: true })
+      await reloadSelectedMessages()
+    }
+  }
+}
+
+const queueRealtimeBizRefresh = () => {
+  if (!realtimeEnabled.value) return
+  if (realtimeRefreshFuture) {
+    realtimeRefreshQueued = true
+    return
+  }
+
+  realtimeRefreshFuture = syncAllBizRealtime().finally(() => {
+    realtimeRefreshFuture = null
+    if (realtimeRefreshQueued) {
+      realtimeRefreshQueued = false
+      queueRealtimeBizRefresh()
+    }
+  })
+}
+
+// 向上滚动加载逻辑
+// 因为容器设置了 flex-col-reverse，所以 scrollTop 越靠近负值(或0取决于浏览器)越是到了历史消息端
+// 但比较通用兼容的做法是监听 scroll，距离顶部或底部小于阈值时触发
+const handleScroll = (e) => {
+  const target = e.target
+  // 针对 flex-col-reverse: 滚动到底部实际上是视觉上的最上方(历史消息)
+  // 当 scrollHeight - Math.abs(scrollTop) - clientHeight < 50 时加载
+  if (target.scrollHeight - Math.abs(target.scrollTop) - target.clientHeight < 50) {
+    loadMessages()
+  }
+}
+
+watch(selectedDbAccount, async (next, prev) => {
+  if (String(next || '').trim() === String(prev || '').trim()) return
+  selectedBizAccount.value = null
+  resetMessagesState()
+  searchQuery.value = ''
+
+  if (!String(next || '').trim()) {
+    accounts.value = []
+    return
+  }
+  await fetchAccounts({ preserveSelection: false })
+  if (realtimeEnabled.value) {
+    await syncAllBizRealtime({ forceReload: true })
+  }
+})
+
+watch(changeSeq, (next, prev) => {
+  if (!realtimeEnabled.value) return
+  if (next === prev) return
+  queueRealtimeBizRefresh()
+})
+
+watch(realtimeEnabled, async (enabled, wasEnabled) => {
+  if (enabled && !wasEnabled) {
+    await syncAllBizRealtime({ forceReload: true })
+  }
+})
+
+onMounted(async () => {
+  await chatAccountsStore.ensureLoaded()
+  await fetchAccounts({ preserveSelection: false })
+  if (realtimeEnabled.value) {
+    await syncAllBizRealtime({ forceReload: true })
+  }
+})
+</script>
+
+<style scoped>
+/* 隐藏滚动条但允许滚动（可选） */
+.overflow-y-auto::-webkit-scrollbar {
+  width: 6px;
+}
+.overflow-y-auto::-webkit-scrollbar-track {
+  background: transparent;
+}
+.overflow-y-auto::-webkit-scrollbar-thumb {
+  background-color: rgba(0,0,0,0.1);
+  border-radius: 10px;
+}
+</style>

frontend/components/SettingsDialog.vue

@@ -4,9 +4,9 @@
     class="settings-dialog fixed inset-0 z-[120] flex items-center justify-center bg-black/40 px-4 py-4 backdrop-blur-md sm:py-8"
     @click.self="handleClose"
   >
-    <div class="settings-dialog-panel flex h-[80vh] min-h-[380px] w-full max-w-[760px] overflow-hidden rounded-[10px] border border-[#e2e2e2] bg-white shadow-2xl">
+    <div class="settings-dialog-panel flex h-[80vh] min-h-[380px] w-full max-w-[880px] overflow-hidden rounded-[10px] border border-[#e2e2e2] bg-white shadow-2xl">
       <!-- Sidebar -->
-      <aside class="flex w-[180px] shrink-0 flex-col bg-[#fcfcfc] border-r border-[#eeeeee]">
+      <aside class="flex w-[160px] shrink-0 flex-col bg-[#fcfcfc] border-r border-[#eeeeee]">
         <div class="mt-4 mb-2 flex items-center px-4 gap-2">
           <div class="flex h-6 w-6 items-center justify-center rounded-[5px] bg-[#e7f5ee] text-[#07b75b]">
             <svg class="h-[15px] w-[15px]" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round">
@@ -149,19 +149,74 @@
               </div>
 
               <div class="px-3.5 py-3">
-                <div class="flex flex-col gap-1.5 sm:flex-row sm:items-center sm:justify-between">
-                  <div class="min-w-0 flex-1">
-                    <div class="text-[13px] font-medium text-[#222]">output 目录</div>
-                    <div class="mt-0.5 text-[11px] text-[#909090] break-words">{{ desktopOutputDirText }}</div>
+                <div class="flex flex-col gap-2.5">
+                  <div class="flex flex-col gap-1.5 sm:flex-row sm:items-center sm:justify-between">
+                    <div class="min-w-0 flex-1">
+                      <div class="text-[13px] font-medium text-[#222]">output 目录</div>
+                      <div class="mt-0.5 text-[11px] text-[#909090] break-words">
+                        当前：{{ desktopOutputDirText }}
+                        <span class="ml-1 text-[#666]">{{ desktopOutputDirIsDefault ? '（默认位置）' : '（自定义位置）' }}</span>
+                      </div>
+                      <div class="mt-0.5 text-[11px] text-[#909090] break-words">默认：{{ desktopOutputDirDefaultText }}</div>
+                      <div v-if="desktopOutputDirPendingText" class="mt-0.5 text-[11px] text-amber-700 break-words">
+                        待应用：{{ desktopOutputDirPendingText }}
+                      </div>
+                      <div v-if="desktopOutputDirUnavailableReason" class="mt-1 text-[11px] text-amber-700 break-words">
+                        {{ desktopOutputDirUnavailableReason }}
+                      </div>
+                    </div>
+                    <button
+                      type="button"
+                      class="shrink-0 rounded-[6px] border border-[#e2e2e2] bg-white px-2 py-1 text-[12px] text-[#222] transition hover:bg-[#f9f9f9] disabled:cursor-not-allowed disabled:opacity-50"
+                      :disabled="!isDesktopEnv || desktopOutputDirLoading || desktopOutputDirApplying"
+                      @click="onDesktopOpenOutputDir"
+                    >
+                      打开当前 output
+                    </button>
+                  </div>
+                  <div class="flex flex-col gap-1.5 sm:flex-row sm:items-center">
+                    <input
+                      v-model="desktopOutputDirInput"
+                      type="text"
+                      spellcheck="false"
+                      class="min-w-0 flex-1 rounded-[6px] border border-[#e2e2e2] bg-white px-2.5 py-1.5 text-[12px] text-[#333] outline-none transition focus:border-[#07b75b] focus:ring-1 focus:ring-[#07b75b]/30"
+                      :disabled="desktopOutputDirControlsDisabled"
+                      :placeholder="desktopOutputDirCanChange ? '选择新的 output 目录' : '当前环境不支持修改 output 目录'"
+                      @keyup.enter="onDesktopOutputDirApply"
+                    />
+                    <div class="flex shrink-0 items-center gap-1.5">
+                      <button
+                        type="button"
+                        class="rounded-[6px] border border-[#e2e2e2] bg-white px-2 py-1 text-[12px] text-[#222] transition hover:bg-[#f9f9f9] disabled:cursor-not-allowed disabled:opacity-50"
+                        :disabled="desktopOutputDirControlsDisabled"
+                        @click="onDesktopChooseOutputDir"
+                      >
+                        选择文件夹
+                      </button>
+                      <button
+                        type="button"
+                        class="rounded-[6px] border border-[#e2e2e2] bg-white px-2 py-1 text-[12px] text-[#222] transition hover:bg-[#f9f9f9] disabled:cursor-not-allowed disabled:opacity-50"
+                        :disabled="desktopOutputDirControlsDisabled"
+                        @click="onDesktopOutputDirApply"
+                      >
+                        {{ desktopOutputDirApplying ? '迁移中...' : '应用' }}
+                      </button>
+                      <button
+                        type="button"
+                        class="rounded-[6px] border border-[#e2e2e2] bg-white px-2 py-1 text-[12px] text-[#222] transition hover:bg-[#f9f9f9] disabled:cursor-not-allowed disabled:opacity-50"
+                        :disabled="desktopOutputDirControlsDisabled"
+                        @click="onDesktopOutputDirReset"
+                      >
+                        恢复默认
+                      </button>
+                    </div>
+                  </div>
+                  <div v-if="desktopOutputDirCanChange" class="text-[11px] text-[#909090]">
+                    修改后会迁移整个 output 目录；如果目标目录已有内容，会先阻止并提示。
+                  </div>
+                  <div v-if="desktopOutputDirMessage" class="rounded-[6px] border border-[#d8efe2] bg-[#f4fbf7] px-2.5 py-1.5 text-[11px] text-[#1b6b43] whitespace-pre-wrap">
+                    {{ desktopOutputDirMessage }}
                   </div>
-                  <button
-                    type="button"
-                    class="shrink-0 rounded-[6px] border border-[#e2e2e2] bg-white px-2 py-1 text-[12px] text-[#222] transition hover:bg-[#f9f9f9] disabled:cursor-not-allowed disabled:opacity-50"
-                    :disabled="!isDesktopEnv || desktopOutputDirLoading"
-                    @click="onDesktopOpenOutputDir"
-                  >
-                    打开 output
-                  </button>
                 </div>
                 <div v-if="desktopOutputDirError" class="mt-1.5 text-[11px] text-red-600 whitespace-pre-wrap">
                   {{ desktopOutputDirError }}
@@ -345,13 +400,33 @@ const desktopBackendPortError = ref('')
 const desktopBackendPortDefault = ref(10392)
 
 const desktopOutputDir = ref('')
+const desktopOutputDirDefault = ref('')
+const desktopOutputDirInput = ref('')
+const desktopOutputDirPending = ref('')
 const desktopOutputDirLoading = ref(false)
+const desktopOutputDirApplying = ref(false)
 const desktopOutputDirError = ref('')
+const desktopOutputDirMessage = ref('')
+const desktopOutputDirIsDefault = ref(true)
+const desktopOutputDirCanChange = ref(true)
+const desktopOutputDirUnavailableReason = ref('')
 const desktopOutputDirText = computed(() => {
   if (!isDesktopEnv.value) return '仅桌面端可用'
   const v = String(desktopOutputDir.value || '').trim()
   return v || '—'
 })
+const desktopOutputDirDefaultText = computed(() => {
+  if (!isDesktopEnv.value) return '仅桌面端可用'
+  const v = String(desktopOutputDirDefault.value || '').trim()
+  return v || '—'
+})
+const desktopOutputDirPendingText = computed(() => {
+  const v = String(desktopOutputDirPending.value || '').trim()
+  return v || ''
+})
+const desktopOutputDirControlsDisabled = computed(() => (
+  !isDesktopEnv.value || !desktopOutputDirCanChange.value || desktopOutputDirLoading.value || desktopOutputDirApplying.value
+))
 
 const desktopLogFilePath = ref('')
 const desktopLogFileLoading = ref(false)
@@ -530,12 +605,33 @@ const refreshDesktopBackendPort = async () => {
 
 const refreshDesktopOutputDir = async () => {
   if (!process.client || typeof window === 'undefined') return
-  if (!window.wechatDesktop?.getOutputDir) return
+  if (!window.wechatDesktop?.getOutputDir && !window.wechatDesktop?.getOutputDirInfo) return
   desktopOutputDirLoading.value = true
   desktopOutputDirError.value = ''
   try {
+    if (window.wechatDesktop?.getOutputDirInfo) {
+      const info = await window.wechatDesktop.getOutputDirInfo()
+      desktopOutputDir.value = String(info?.path || '').trim()
+      desktopOutputDirDefault.value = String(info?.defaultPath || '').trim()
+      desktopOutputDirPending.value = String(info?.pendingPath || '').trim()
+      desktopOutputDirIsDefault.value = !!info?.isDefault
+      desktopOutputDirCanChange.value = info?.canChange !== false
+      desktopOutputDirUnavailableReason.value = String(info?.changeUnavailableReason || '').trim()
+      desktopOutputDirInput.value = desktopOutputDir.value || desktopOutputDirDefault.value
+      if (info?.lastError) {
+        desktopOutputDirError.value = String(info.lastError || '').trim()
+      }
+      return
+    }
+
     const v = await window.wechatDesktop.getOutputDir()
     desktopOutputDir.value = String(v || '').trim()
+    desktopOutputDirDefault.value = desktopOutputDir.value
+    desktopOutputDirPending.value = ''
+    desktopOutputDirIsDefault.value = true
+    desktopOutputDirCanChange.value = false
+    desktopOutputDirUnavailableReason.value = '当前桌面环境不支持修改 output 目录'
+    desktopOutputDirInput.value = desktopOutputDir.value
   } catch (e) {
     desktopOutputDirError.value = e?.message || '读取 output 目录失败'
   } finally {
@@ -558,6 +654,62 @@ const onDesktopOpenOutputDir = async () => {
   }
 }
 
+const onDesktopChooseOutputDir = async () => {
+  if (!process.client || typeof window === 'undefined') return
+  if (!window.wechatDesktop?.chooseDirectory) return
+  desktopOutputDirError.value = ''
+  desktopOutputDirMessage.value = ''
+  try {
+    const result = await window.wechatDesktop.chooseDirectory({ title: '选择新的 output 目录' })
+    if (result && !result.canceled && Array.isArray(result.filePaths) && result.filePaths.length > 0) {
+      desktopOutputDirInput.value = String(result.filePaths[0] || '').trim()
+    }
+  } catch (e) {
+    desktopOutputDirError.value = e?.message || '选择 output 目录失败'
+  }
+}
+
+const applyDesktopOutputDir = async (nextDir) => {
+  if (!process.client || typeof window === 'undefined') return
+  if (!window.wechatDesktop?.setOutputDir) {
+    desktopOutputDirError.value = '当前桌面环境不支持修改 output 目录'
+    return
+  }
+  if (!desktopOutputDirCanChange.value) {
+    desktopOutputDirError.value = desktopOutputDirUnavailableReason.value || '开发模式不支持界面修改 output 目录'
+    return
+  }
+  desktopOutputDirApplying.value = true
+  desktopOutputDirError.value = ''
+  desktopOutputDirMessage.value = ''
+  try {
+    const res = await window.wechatDesktop.setOutputDir(String(nextDir ?? '').trim())
+    if (res?.success === false) {
+      desktopOutputDirError.value = String(res?.error || '修改 output 目录失败').trim()
+      await refreshDesktopOutputDir()
+      return
+    }
+    await refreshDesktopOutputDir()
+    desktopOutputDirMessage.value = String(
+      res?.message || (res?.changed === false ? 'output 目录未变化' : 'output 目录已更新')
+    ).trim()
+  } catch (e) {
+    desktopOutputDirError.value = e?.message || '修改 output 目录失败'
+    await refreshDesktopOutputDir()
+  } finally {
+    desktopOutputDirApplying.value = false
+  }
+}
+
+const onDesktopOutputDirApply = async () => {
+  await applyDesktopOutputDir(desktopOutputDirInput.value)
+}
+
+const onDesktopOutputDirReset = async () => {
+  desktopOutputDirInput.value = desktopOutputDirDefault.value
+  await applyDesktopOutputDir('')
+}
+
 const refreshBackendLogFileInfo = async () => {
   if (!process.client || typeof window === 'undefined') return
   desktopLogFileLoading.value = true
@@ -702,6 +854,9 @@ const onDesktopCheckUpdates = async () => {
 watch(() => props.open, async (isOpen) => {
   if (!isOpen) return
   await refreshBackendLogFileInfo()
+  if (isDesktopEnv.value) {
+    await refreshDesktopOutputDir()
+  }
 }, { immediate: true })
 
 onMounted(async () => {

frontend/components/SidebarRail.vue

@@ -101,6 +101,21 @@
         </div>
       </div>
 
+      <div
+          class="sidebar-rail-action w-full h-[var(--sidebar-rail-step)] flex items-center justify-center cursor-pointer group"
+          title="服务号"
+          @click="goBiz"
+      >
+        <div class="sidebar-rail-plate w-[var(--sidebar-rail-btn)] h-[var(--sidebar-rail-btn)] rounded-md flex items-center justify-center transition-colors bg-transparent">
+          <div class="sidebar-rail-icon w-[var(--sidebar-rail-icon)] h-[var(--sidebar-rail-icon)]" :class="{ 'sidebar-rail-icon-active': isBizRoute }">
+            <svg class="w-full h-full" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
+              <path d="M11 5L6 9H2v6h4l5 4V5z"></path>
+              <path d="M19.07 4.93a10 10 0 0 1 0 14.14M15.54 8.46a5 5 0 0 1 0 7.07"></path>
+            </svg>
+          </div>
+        </div>
+      </div>
+
       <!-- Wrapped -->
       <div
         class="sidebar-rail-action w-full h-[var(--sidebar-rail-step)] flex items-center justify-center cursor-pointer group"
@@ -479,34 +494,17 @@ const isChatRoute = computed(() => route.path?.startsWith('/chat'))
 const isEditsRoute = computed(() => route.path?.startsWith('/edits'))
 const isSnsRoute = computed(() => route.path?.startsWith('/sns'))
 const isContactsRoute = computed(() => route.path?.startsWith('/contacts'))
+const isBizRoute = computed(() => route.path?.startsWith('/biz')) // 新增
 const isWrappedRoute = computed(() => route.path?.startsWith('/wrapped'))
-const goChat = async () => {
-  await navigateTo('/chat')
-}
 
-const goEdits = async () => {
-  await navigateTo('/edits')
-}
-
-const goSns = async () => {
-  await navigateTo('/sns')
-}
-
-const goContacts = async () => {
-  await navigateTo('/contacts')
-}
-
-const goWrapped = async () => {
-  await navigateTo('/wrapped')
-}
-
-const goGuide = async () => {
-  await navigateTo('/')
-}
-
-const goSettings = () => {
-  openSettingsDialog()
-}
+const goChat = async () => { await navigateTo('/chat') }
+const goEdits = async () => { await navigateTo('/edits') }
+const goSns = async () => { await navigateTo('/sns') }
+const goContacts = async () => { await navigateTo('/contacts') }
+const goBiz = async () => { await navigateTo('/biz') }
+const goWrapped = async () => { await navigateTo('/wrapped') }
+const goGuide = async () => { await navigateTo('/') }
+const goSettings = () => { openSettingsDialog() }
 
 const onWindowKeydown = (event) => {
   if (event?.key !== 'Escape') return

frontend/components/chat/SessionListPanel.vue

@@ -69,7 +69,7 @@
           <div v-else-if="contacts.length === 0" class="session-list-status px-3 py-2 text-sm">
             暂无会话
           </div>
-          <template v-else>
+          <div v-else class="pb-4">
             <div v-for="contact in filteredContacts" :key="contact.id"
               class="session-list-item px-3 cursor-pointer transition-colors duration-150 h-[calc(80px/var(--dpr))] flex items-center"
               :class="{
@@ -118,7 +118,7 @@
                 </div>
               </div>
             </div>
-          </template>
+          </div>
         </div>
       </div>
 

frontend/composables/chat/useChatMessages.js

@@ -74,6 +74,7 @@ export const useChatMessages = ({
   let highlightTimer = null
 
   const messageTypeFilter = ref('all')
+  const localMediaVersion = ref(0)
   const messageTypeFilterOptions = [
     { value: 'all', label: '全部' },
     { value: 'text', label: '文本' },
@@ -95,9 +96,39 @@ export const useChatMessages = ({
   const normalizeMessage = createMessageNormalizer({
     apiBase,
     getSelectedAccount: () => selectedAccount.value,
-    getSelectedContact: () => selectedContact.value
+    getSelectedContact: () => selectedContact.value,
+    getLocalMediaVersion: () => localMediaVersion.value
   })
 
+  const bumpLocalMediaVersion = () => {
+    localMediaVersion.value = (localMediaVersion.value + 1) % 1000000000
+    return localMediaVersion.value
+  }
+
+  const renormalizeLoadedMessages = (username) => {
+    const key = String(username || '').trim()
+    if (!key) return
+    const existing = allMessages.value[key]
+    if (!Array.isArray(existing) || !existing.length) return
+
+    const refreshed = dedupeMessagesById(existing.map((message) => {
+      const normalized = normalizeMessage(message)
+      return {
+        ...message,
+        ...normalized,
+        _emojiDownloading: !!message?._emojiDownloading,
+        _emojiDownloaded: typeof message?._emojiDownloaded === 'boolean' ? message._emojiDownloaded : normalized._emojiDownloaded,
+        _quoteImageError: false,
+        _quoteThumbError: false
+      }
+    }))
+
+    allMessages.value = {
+      ...allMessages.value,
+      [key]: refreshed
+    }
+  }
+
   const messages = computed(() => {
     if (!selectedContact.value) return []
     return allMessages.value[selectedContact.value.username] || []
@@ -534,9 +565,17 @@ export const useChatMessages = ({
 
   const refreshSelectedMessages = async () => {
     if (!selectedContact.value) return
+    bumpLocalMediaVersion()
     await loadMessages({ username: selectedContact.value.username, reset: true })
   }
 
+  const refreshCurrentMessageMedia = async () => {
+    if (!selectedContact.value?.username) return
+    bumpLocalMediaVersion()
+    renormalizeLoadedMessages(selectedContact.value.username)
+    await nextTick()
+  }
+
   const refreshRealtimeIncremental = async () => {
     if (!realtimeEnabled.value || !selectedAccount.value || !selectedContact.value?.username) return
     if (searchContext.value?.active || isLoadingMessages.value) return
@@ -912,6 +951,7 @@ export const useChatMessages = ({
     loadMessages,
     loadMoreMessages,
     refreshSelectedMessages,
+    refreshCurrentMessageMedia,
     refreshRealtimeIncremental,
     queueRealtimeRefresh,
     tryEnableRealtimeAuto,

frontend/composables/useApi.js

@@ -205,6 +205,8 @@ export const useApi = () => {
     if (params && params.priority_max_scan != null) query.set('priority_max_scan', String(params.priority_max_scan))
     if (params && params.include_hidden != null) query.set('include_hidden', String(!!params.include_hidden))
     if (params && params.include_official != null) query.set('include_official', String(!!params.include_official))
+    if (params && params.only_official != null) query.set('only_official', String(!!params.only_official))
+    if (params && params.backfill_limit != null) query.set('backfill_limit', String(params.backfill_limit))
     const url = '/chat/realtime/sync_all' + (query.toString() ? `?${query.toString()}` : '')
     return await request(url, { method: 'POST' })
   }
@@ -561,6 +563,44 @@ export const useApi = () => {
     return await request('/get_image_key')
   }
 
+  // 枚举服务号信息
+  const listBizAccounts = async (params = {}) => {
+    const query = new URLSearchParams()
+    if (params && params.account) query.set('account', params.account)
+    const url = '/biz/list' + (query.toString() ? `?${query.toString()}` : '')
+    return await request(url)
+  }
+
+  // 获取普通服务号消息
+  const listBizMessages = async (params = {}) => {
+    const query = new URLSearchParams()
+    if (params && params.account) query.set('account', params.account)
+    if (params && params.username) query.set('username', params.username)
+    if (params && params.limit != null) query.set('limit', String(params.limit))
+    if (params && params.offset != null) query.set('offset', String(params.offset))
+    const url = '/biz/messages' + (query.toString() ? `?${query.toString()}` : '')
+    return await request(url)
+  }
+
+  // 获取微信支付记录
+  const listBizPayRecords = async (params = {}) => {
+    const query = new URLSearchParams()
+    if (params && params.account) query.set('account', params.account)
+    if (params && params.limit != null) query.set('limit', String(params.limit))
+    if (params && params.offset != null) query.set('offset', String(params.offset))
+    const url = '/biz/pay_records' + (query.toString() ? `?${query.toString()}` : '')
+    return await request(url)
+  }
+
+  const getBizProxyImageUrl = (url) => {
+    if (!url) return ''
+    if (url.startsWith('data:')) return url // 如果已经是 base64，不处理
+    const query = new URLSearchParams()
+    query.set('url', url)
+    const base = baseURL ? baseURL.replace(/\/$/, '') : ''
+    return `${base}/biz/proxy_image?${query.toString()}`
+  }
+
   return {
     detectWechat,
     detectCurrentAccount,
@@ -616,5 +656,9 @@ export const useApi = () => {
     getKeys,
     getImageKey,
     getWxStatus,
+    listBizAccounts,
+    listBizMessages,
+    listBizPayRecords,
+    getBizProxyImageUrl,
   }
 }

frontend/lib/chat/message-normalizer.js

@@ -17,11 +17,12 @@ const buildAccountMediaUrl = (apiBase, path, parts) => {
   return `${apiBase}${path}?${parts.filter(Boolean).join('&')}`
 }
 
-export const createMessageNormalizer = ({ apiBase, getSelectedAccount, getSelectedContact }) => {
+export const createMessageNormalizer = ({ apiBase, getSelectedAccount, getSelectedContact, getLocalMediaVersion }) => {
   return (msg) => {
     const account = String(getSelectedAccount?.() || '').trim()
     const contact = getSelectedContact?.() || null
     const username = String(contact?.username || '').trim()
+    const localMediaVersion = Number(getLocalMediaVersion?.() || 0)
     const isSent = !!msg.isSent
     const sender = isSent ? '我' : (msg.senderDisplayName || msg.senderUsername || contact?.name || '')
     const fallbackAvatar = (!isSent && !contact?.isGroup) ? (contact?.avatar || null) : null
@@ -66,7 +67,8 @@ export const createMessageNormalizer = ({ apiBase, getSelectedAccount, getSelect
         `account=${encodeURIComponent(account)}`,
         msg.imageMd5 ? `md5=${encodeURIComponent(msg.imageMd5)}` : '',
         msg.imageFileId ? `file_id=${encodeURIComponent(msg.imageFileId)}` : '',
-        `username=${encodeURIComponent(username)}`
+        `username=${encodeURIComponent(username)}`,
+        localMediaVersion > 0 ? `v=${encodeURIComponent(String(localMediaVersion))}` : ''
       ])
     })()
 
@@ -86,7 +88,8 @@ export const createMessageNormalizer = ({ apiBase, getSelectedAccount, getSelect
         `account=${encodeURIComponent(account)}`,
         msg.videoThumbMd5 ? `md5=${encodeURIComponent(msg.videoThumbMd5)}` : '',
         msg.videoThumbFileId ? `file_id=${encodeURIComponent(msg.videoThumbFileId)}` : '',
-        `username=${encodeURIComponent(username)}`
+        `username=${encodeURIComponent(username)}`,
+        localMediaVersion > 0 ? `v=${encodeURIComponent(String(localMediaVersion))}` : ''
       ])
     })()
 
@@ -158,7 +161,8 @@ export const createMessageNormalizer = ({ apiBase, getSelectedAccount, getSelect
       return buildAccountMediaUrl(apiBase, '/chat/media/image', [
         `account=${encodeURIComponent(account)}`,
         `server_id=${encodeURIComponent(quoteServerIdStr)}`,
-        username ? `username=${encodeURIComponent(username)}` : ''
+        username ? `username=${encodeURIComponent(username)}` : '',
+        localMediaVersion > 0 ? `v=${encodeURIComponent(String(localMediaVersion))}` : ''
       ])
     })()
 

frontend/pages/biz.vue

@@ -0,0 +1,16 @@
+<template>
+  <div class="h-full min-h-0 flex overflow-hidden bg-white">
+    <div class="flex-1 min-w-0">
+      <BizMessages />
+    </div>
+  </div>
+</template>
+
+<script setup>
+
+import BizMessages from "../components/BizMessages.vue";
+
+useHead({
+  title: '服务号消息 - WeChatDataAnalysis'
+})
+</script>

frontend/pages/chat/[[username]].vue

@@ -216,6 +216,7 @@ const {
   loadMessages,
   loadMoreMessages,
   refreshSelectedMessages,
+  refreshCurrentMessageMedia,
   queueRealtimeRefresh,
   tryEnableRealtimeAuto,
   resetMessageState,
@@ -568,6 +569,28 @@ const onGlobalKeyDown = (event) => {
   }
 }
 
+let lastResumeMediaRefreshAt = 0
+
+const maybeRefreshMediaOnResume = () => {
+  if (!process.client) return
+  if (!selectedContact.value?.username) return
+  if (searchContext.value?.active) return
+
+  const now = Date.now()
+  if ((now - lastResumeMediaRefreshAt) < 1200) return
+  lastResumeMediaRefreshAt = now
+  void refreshCurrentMessageMedia()
+}
+
+const onWindowFocus = () => {
+  maybeRefreshMediaOnResume()
+}
+
+const onVisibilityChange = () => {
+  if (document.visibilityState !== 'visible') return
+  maybeRefreshMediaOnResume()
+}
+
 onMounted(async () => {
   if (!process.client) return
 
@@ -585,6 +608,8 @@ onMounted(async () => {
   document.addEventListener('touchmove', onFloatingWindowMouseMove)
   document.addEventListener('touchend', onFloatingWindowMouseUp)
   document.addEventListener('touchcancel', onFloatingWindowMouseUp)
+  window.addEventListener('focus', onWindowFocus)
+  document.addEventListener('visibilitychange', onVisibilityChange)
 
   logChatBootstrap('loadContacts:start', {
     selectedAccount: selectedAccount.value
@@ -635,6 +660,8 @@ onUnmounted(() => {
   document.removeEventListener('touchmove', onFloatingWindowMouseMove)
   document.removeEventListener('touchend', onFloatingWindowMouseUp)
   document.removeEventListener('touchcancel', onFloatingWindowMouseUp)
+  window.removeEventListener('focus', onWindowFocus)
+  document.removeEventListener('visibilitychange', onVisibilityChange)
 
   if (locateServerIdTimer) clearTimeout(locateServerIdTimer)
   locateServerIdTimer = null

src/wechat_decrypt_tool/api.py

@@ -36,6 +36,7 @@ from .routers.wrapped import router as _wrapped_router
 from .request_logging import log_server_errors_middleware
 from .sns_stage_timing import add_sns_stage_timing_headers
 from .wcdb_realtime import WCDB_REALTIME, shutdown as _wcdb_shutdown
+from .routers.biz import router as _biz_router
 
 app = FastAPI(
     title="微信数据库解密工具",
@@ -96,6 +97,7 @@ app.include_router(_chat_media_router)
 app.include_router(_sns_router)
 app.include_router(_sns_export_router)
 app.include_router(_wrapped_router)
+app.include_router(_biz_router)
 
 
 class _SPAStaticFiles(StaticFiles):

src/wechat_decrypt_tool/app_paths.py

@@ -3,6 +3,9 @@ from __future__ import annotations
 import os
 from pathlib import Path
 
+ENV_DATA_DIR_KEY = "WECHAT_TOOL_DATA_DIR"
+ENV_OUTPUT_DIR_KEY = "WECHAT_TOOL_OUTPUT_DIR"
+
 
 def get_data_dir() -> Path:
     """Base writable directory for all runtime output (logs, databases, key store).
@@ -12,13 +15,16 @@ def get_data_dir() -> Path:
     - Dev defaults to the current working directory (repo root).
     """
 
-    v = os.environ.get("WECHAT_TOOL_DATA_DIR", "").strip()
+    v = os.environ.get(ENV_DATA_DIR_KEY, "").strip()
     if v:
-        return Path(v)
+        return Path(v).expanduser()
     return Path.cwd()
 
 
 def get_output_dir() -> Path:
+    v = os.environ.get(ENV_OUTPUT_DIR_KEY, "").strip()
+    if v:
+        return Path(v).expanduser()
     return get_data_dir() / "output"
 
 
@@ -28,4 +34,3 @@ def get_output_databases_dir() -> Path:
 
 def get_account_keys_path() -> Path:
     return get_output_dir() / "account_keys.json"
-

src/wechat_decrypt_tool/logging_config.py

@@ -41,6 +41,22 @@ class ColoredFormatter(logging.Formatter):
         return formatted
 
 
+def _can_use_logging_stream(stream) -> bool:
+    try:
+        if stream is None or getattr(stream, "closed", False):
+            return False
+    except Exception:
+        return False
+
+    try:
+        stream.write("")
+        stream.flush()
+    except Exception:
+        return False
+
+    return True
+
+
 class WeChatLogger:
     """微信解密工具统一日志管理器"""
     
@@ -64,6 +80,12 @@ class WeChatLogger:
         if env_level:
             log_level = env_level
 
+        console_logging_env = str(os.environ.get("WECHAT_TOOL_ENABLE_CONSOLE_LOG", "") or "").strip().lower()
+        console_logging_forced = console_logging_env in {"1", "true", "yes", "on"}
+        console_logging_disabled = console_logging_env in {"0", "false", "no", "off"}
+
+        level = getattr(logging, str(log_level or "INFO").upper(), logging.INFO)
+
         # 创建日志目录
         now = datetime.now()
         from .app_paths import get_output_dir
@@ -73,10 +95,41 @@ class WeChatLogger:
         
         # 设置日志文件名
         date_str = now.strftime("%d")
-        self.log_file = log_dir / f"{date_str}_wechat_tool.log"
+        desired_log_file = log_dir / f"{date_str}_wechat_tool.log"
+
+        root_logger = logging.getLogger()
+        wants_console_handler = _can_use_logging_stream(sys.stdout)
+        if getattr(sys, "frozen", False) and not console_logging_forced:
+            wants_console_handler = False
+        if console_logging_disabled:
+            wants_console_handler = False
+
+        if WeChatLogger._initialized:
+            current_log_file = Path(getattr(self, "log_file", desired_log_file))
+            has_expected_file_handler = False
+            has_stream_handler = False
+            for handler in root_logger.handlers:
+                if isinstance(handler, logging.FileHandler):
+                    try:
+                        if Path(handler.baseFilename).resolve() == desired_log_file.resolve():
+                            has_expected_file_handler = True
+                    except Exception:
+                        if Path(handler.baseFilename) == desired_log_file:
+                            has_expected_file_handler = True
+                elif isinstance(handler, logging.StreamHandler):
+                    has_stream_handler = True
+            if (
+                current_log_file == desired_log_file
+                and root_logger.level == level
+                and has_expected_file_handler
+                and (has_stream_handler or not wants_console_handler)
+            ):
+                self.log_file = desired_log_file
+                return self.log_file
+
+        self.log_file = desired_log_file
         
         # 清除现有的处理器
-        root_logger = logging.getLogger()
         for handler in root_logger.handlers[:]:
             root_logger.removeHandler(handler)
             try:
@@ -100,18 +153,20 @@ class WeChatLogger:
         # 文件处理器
         file_handler = logging.FileHandler(self.log_file, encoding='utf-8')
         file_handler.setFormatter(file_formatter)
-        level = getattr(logging, str(log_level or "INFO").upper(), logging.INFO)
         file_handler.setLevel(level)
 
         # 控制台处理器
-        console_handler = logging.StreamHandler(sys.stdout)
-        console_handler.setFormatter(console_formatter)
-        console_handler.setLevel(level)
+        console_handler = None
+        if wants_console_handler:
+            console_handler = logging.StreamHandler(sys.stdout)
+            console_handler.setFormatter(console_formatter)
+            console_handler.setLevel(level)
         
         # 配置根日志器
         root_logger.setLevel(level)
         root_logger.addHandler(file_handler)
-        root_logger.addHandler(console_handler)
+        if console_handler is not None:
+            root_logger.addHandler(console_handler)
         
         # 只为uvicorn日志器添加文件处理器，保持其原有的控制台处理器（带颜色）
         uvicorn_logger = logging.getLogger("uvicorn")
@@ -158,7 +213,8 @@ class WeChatLogger:
             except Exception:
                 pass
         fastapi_logger.addHandler(file_handler)
-        fastapi_logger.addHandler(console_handler)
+        if console_handler is not None:
+            fastapi_logger.addHandler(console_handler)
         fastapi_logger.setLevel(level)
         
         # 记录初始化信息

src/wechat_decrypt_tool/routers/biz.py

@@ -0,0 +1,370 @@
+import hashlib
+import sqlite3
+import time
+import xml.etree.ElementTree as ET
+from pathlib import Path
+from typing import Optional, Any, Dict, List
+import urllib
+from fastapi import APIRouter, HTTPException, Response
+from pydantic import BaseModel
+
+from ..chat_helpers import _resolve_account_dir
+from ..path_fix import PathFixRoute
+from ..logging_config import get_logger
+
+try:
+    import zstandard as zstd
+except Exception:
+    zstd = None
+
+logger = get_logger(__name__)
+router = APIRouter(route_class=PathFixRoute)
+
+
+def decompress_zstd_content(data: bytes, source_id: str, local_id: int) -> Optional[bytes]:
+    """Zstandard 解压逻辑"""
+    if not data or not data.startswith(b'\x28\xb5\x2f\xfd'):
+        return None
+    try:
+        if zstd:
+            dctx = zstd.ZstdDecompressor()
+            return dctx.decompress(data, max_output_size=10 * 1024 * 1024)
+    except Exception as e:
+        error_msg = f"❌ [解压失败] 服务号id: {source_id}, local_id: {local_id} -> {e}"
+        print(error_msg)
+        logger.error(error_msg)
+    return None
+
+
+def extract_xml_from_db_content(content: Any, source_id: str, local_id: int) -> str:
+    """提取并解压数据库内容"""
+    if not content:
+        return ""
+
+    if isinstance(content, memoryview):
+        content = content.tobytes()
+    elif isinstance(content, str):
+        content = content.encode('utf-8', errors='ignore')
+
+    if isinstance(content, bytes):
+        decompressed = decompress_zstd_content(content, source_id, local_id)
+        if decompressed:
+            return decompressed.decode('utf-8', errors='ignore')
+
+        # 若不是 zstd 压缩或解压失败，尝试直接 decode
+        try:
+            return content.decode('utf-8', errors='ignore')
+        except Exception:
+            return ""
+    return ""
+
+
+def parse_wechat_xml_to_struct(xml_str: str, source_id: str, local_id: int) -> Optional[Dict[str, Any]]:
+    """解析微信服务号 XML 到 Dict"""
+    if not xml_str.strip():
+        return None
+    try:
+        root = ET.fromstring(xml_str)
+
+        def get_tag_text(element, path, default=""):
+            node = element.find(path)
+            return node.text if node is not None and node.text else default
+
+        main_cover = get_tag_text(root, ".//appmsg/thumburl")
+        if not main_cover:
+            main_cover = get_tag_text(root, ".//topnew/cover")
+
+        result = {
+            "title": get_tag_text(root, ".//appmsg/title"),
+            "des": get_tag_text(root, ".//appmsg/des"),
+            "url": get_tag_text(root, ".//appmsg/url"),
+            "cover": main_cover,
+            "content_list": []
+        }
+
+        items = root.findall(".//mmreader/category/item")
+        for item in items:
+            item_struct = {
+                "title": get_tag_text(item, "title"),
+                "url": get_tag_text(item, "url"),
+                "cover": get_tag_text(item, "cover"),
+                "summary": get_tag_text(item, "summary")
+            }
+            if item_struct["title"]:
+                result["content_list"].append(item_struct)
+
+        return result
+    except Exception as e:
+        error_msg = f"❌ [解析XML失败] 服务号id: {source_id}, local_id: {local_id} -> {e}"
+        print(error_msg)
+        logger.error(error_msg)
+        return None
+
+
+def parse_pay_xml(xml_str: str, local_id: int) -> Optional[Dict[str, Any]]:
+    """解析微信支付 XML"""
+    if not xml_str.strip():
+        return None
+    try:
+        root = ET.fromstring(xml_str)
+
+        def get_text(path):
+            node = root.find(path)
+            return node.text if node is not None else ""
+
+        record = {
+            "title": get_text(".//appmsg/title"),
+            "description": get_text(".//appmsg/des"),
+            "merchant_name": get_text(".//template_header/display_name"),
+            "merchant_icon": get_text(".//template_header/icon_url"),
+            "timestamp": int(get_text(".//pub_time") or 0),
+            "formatted_time": ""
+        }
+        return record
+    except Exception as e:
+        error_msg = f"❌ [解析微信支付XML失败] 支付id: gh_3dfda90e39d6, local_id: {local_id} -> {e}"
+        print(error_msg)
+        logger.error(error_msg)
+        return None
+
+@router.get("/api/biz/proxy_image", summary="代理请求微信服务号图片")
+def proxy_biz_image(url: str):
+    if not url:
+        return Response(status_code=400)
+    try:
+        req = urllib.request.Request(url, headers={
+            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36'
+        })
+        with urllib.request.urlopen(req, timeout=10) as response:
+            content = response.read()
+            content_type = response.headers.get('Content-Type', 'image/jpeg')
+            return Response(content=content, media_type=content_type)
+    except Exception as e:
+        logger.error(f"[biz] 代理图片失败: {url} -> {e}")
+        return Response(status_code=500)
+
+# 接口 1：获取全部的服务号/公众号的信息
+@router.get("/api/biz/list", summary="获取全部服务号/公众号列表")
+def get_biz_account_list(account: Optional[str] = None):
+    account_dir = _resolve_account_dir(account)
+
+    biz_ids = set()
+    biz_latest_time = {}
+
+    # 1. 遍历 biz_message_*.db
+    for db_file in account_dir.glob("biz_message*.db"):
+        try:
+            conn = sqlite3.connect(str(db_file))
+            cursor = conn.cursor()
+
+            cursor.execute("PRAGMA table_info(Name2Id)")
+            cols = [row[1].lower() for row in cursor.fetchall()]
+            user_col = "username" if "username" in cols else "user_name" if "user_name" in cols else ""
+
+            if user_col:
+                rows = cursor.execute(f"SELECT {user_col} FROM Name2Id").fetchall()
+                for r in rows:
+                    if r[0]:
+                        uname = r[0]
+                        biz_ids.add(uname)
+
+                        # 顺便查询该号的最后一条消息时间
+                        md5_id = hashlib.md5(uname.encode('utf-8')).hexdigest().lower()
+                        table_name = f"Msg_{md5_id}"
+                        try:
+                            time_res = conn.execute(f"SELECT MAX(create_time) FROM {table_name}").fetchone()
+                            if time_res and time_res[0]:
+                                current_max = biz_latest_time.get(uname, 0)
+                                biz_latest_time[uname] = max(current_max, time_res[0])
+                        except Exception:
+                            pass
+            conn.close()
+        except Exception as e:
+            logger.warning(f"读取 Name2Id 失败 {db_file}: {e}")
+
+    contact_db_path = account_dir / "contact.db"
+    contact_info = {}
+    if contact_db_path.exists() and biz_ids:
+        try:
+            conn = sqlite3.connect(str(contact_db_path))
+            cursor = conn.cursor()
+            placeholders = ",".join(["?"] * len(biz_ids))
+
+            # 先查 contact 表
+            query_contact = f"SELECT username, remark, nick_name, alias, big_head_url FROM contact WHERE username IN ({placeholders})"
+            rows_contact = cursor.execute(query_contact, list(biz_ids)).fetchall()
+
+            for r in rows_contact:
+                uname = r[0]
+                name = r[1] or r[2] or r[3] or uname
+                contact_info[uname] = {
+                    "username": uname,
+                    "name": name,
+                    "avatar": r[4],
+                    "type": 3  # 默认给个 3（未知）
+                }
+
+            # 再查 biz_info 表获取类型
+            try:
+                query_biz = f"SELECT username, type FROM biz_info WHERE username IN ({placeholders})"
+                rows_biz = cursor.execute(query_biz, list(biz_ids)).fetchall()
+                for r in rows_biz:
+                    uname = r[0]
+                    biz_type = r[1]
+                    # 如果查到了且是 0, 1, 2，就更新进去，否则保留 3
+                    if uname in contact_info:
+                        if biz_type in (0, 1, 2):
+                            contact_info[uname]["type"] = biz_type
+                        else:
+                            contact_info[uname]["type"] = 3
+            except Exception as e:
+                logger.warning(f"读取 biz_info 失败: {e}")
+
+            conn.close()
+        except Exception as e:
+            logger.warning(f"读取 contact.db 失败: {e}")
+
+    # 3. 组装结果（不在 contact_info 里的直接丢弃）
+    result = []
+    for uid in biz_ids:
+        if uid in contact_info:
+            info = contact_info[uid]
+            info["last_time"] = biz_latest_time.get(uid, 0)
+            if info["last_time"]:
+                # 格式化日期给前端展示用
+                info["formatted_last_time"] = time.strftime("%Y-%m-%d", time.localtime(info["last_time"]))
+            else:
+                info["formatted_last_time"] = ""
+            result.append(info)
+
+    # 4. 按最后一条消息的时间降序排列
+    result.sort(key=lambda x: x.get("last_time", 0), reverse=True)
+
+    return {"status": "success", "total": len(result), "data": result}
+
+
+# 接口 2：获取普通服务号/公众号的 json 消息 (已修复表名比对 bug)
+@router.get("/api/biz/messages", summary="获取指定服务号的消息")
+def get_biz_messages(username: str, account: Optional[str] = None, limit: int = 50, offset: int = 0):
+    if username == "gh_3dfda90e39d6":
+        raise HTTPException(status_code=400, detail="微信支付记录请请求 /api/biz/pay_records 接口")
+
+    account_dir = _resolve_account_dir(account)
+    md5_id = hashlib.md5(username.encode('utf-8')).hexdigest().lower()
+    table_name = f"Msg_{md5_id}"
+
+    target_db = None
+    for db_file in account_dir.glob("biz_message*.db"):
+        conn = sqlite3.connect(str(db_file))
+        try:
+            # 必须用 table_name.lower()，否则永远匹配不上
+            res = conn.execute("SELECT name FROM sqlite_master WHERE type='table' AND lower(name)=?",
+                               (table_name.lower(),)).fetchone()
+            if res:
+                target_db = db_file
+                break
+        except Exception:
+            pass
+        finally:
+            conn.close()
+
+    if not target_db:
+        return {"status": "success", "data": [], "message": f"未找到 {username} 的消息历史"}
+
+    # ... (后续数据库查询逻辑保持不变) ...
+    messages = []
+    try:
+        conn = sqlite3.connect(str(target_db))
+        cursor = conn.cursor()
+
+        query = f"""
+            SELECT local_id, create_time, message_content 
+            FROM [{table_name}] 
+            WHERE local_type != 1 
+            ORDER BY create_time DESC 
+            LIMIT ? OFFSET ?
+        """
+        rows = cursor.execute(query, (limit, offset)).fetchall()
+
+        for local_id, c_time, content in rows:
+            raw_xml = extract_xml_from_db_content(content, username, local_id)
+            if not raw_xml:
+                continue
+
+            struct_data = parse_wechat_xml_to_struct(raw_xml, username, local_id)
+            if struct_data:
+                struct_data["local_id"] = local_id
+                struct_data["create_time"] = c_time
+                messages.append(struct_data)
+
+        conn.close()
+    except Exception as e:
+        logger.error(f"[biz] 数据库查询出错: {e}")
+        return {"status": "error", "message": str(e)}
+
+    return {"status": "success", "data": messages}
+
+
+# 接口 3：返回微信支付的 json 消息 (已修复表名比对 bug)
+@router.get("/api/biz/pay_records", summary="获取微信支付记录")
+def get_wechat_pay_records(account: Optional[str] = None, limit: int = 50, offset: int = 0):
+    username = "gh_3dfda90e39d6"
+    account_dir = _resolve_account_dir(account)
+    md5_id = hashlib.md5(username.encode('utf-8')).hexdigest().lower()
+    table_name = f"Msg_{md5_id}"
+
+    target_db = None
+    for db_file in account_dir.glob("biz_message*.db"):
+        conn = sqlite3.connect(str(db_file))
+        try:
+            # 必须用 table_name.lower()
+            res = conn.execute("SELECT name FROM sqlite_master WHERE type='table' AND lower(name)=?",
+                               (table_name.lower(),)).fetchone()
+            if res:
+                target_db = db_file
+                break
+        except Exception:
+            pass
+        finally:
+            conn.close()
+
+    if not target_db:
+        return {"status": "success", "data": [], "message": "未找到微信支付的消息历史"}
+
+    messages = []
+    try:
+        conn = sqlite3.connect(str(target_db))
+        cursor = conn.cursor()
+
+        query = f"""
+            SELECT local_id, create_time, message_content 
+            FROM [{table_name}] 
+            WHERE local_type = 21474836529 OR local_type != 1 
+            ORDER BY create_time DESC 
+            LIMIT ? OFFSET ?
+        """
+        rows = cursor.execute(query, (limit, offset)).fetchall()
+
+        for local_id, c_time, content in rows:
+            raw_xml = extract_xml_from_db_content(content, username, local_id)
+            if not raw_xml:
+                continue
+
+            parsed_data = parse_pay_xml(raw_xml, local_id)
+            if parsed_data:
+                parsed_data["local_id"] = local_id
+                parsed_data["create_time"] = c_time
+                if not parsed_data["timestamp"]:
+                    parsed_data["timestamp"] = c_time
+
+                parsed_data["formatted_time"] = time.strftime(
+                    "%Y-%m-%d %H:%M:%S", time.localtime(parsed_data["timestamp"])
+                )
+                messages.append(parsed_data)
+
+        conn.close()
+    except Exception as e:
+        logger.error(f"[biz] 查询微信支付数据库出错: {e}")
+        return {"status": "error", "message": str(e)}
+
+    return {"status": "success", "data": messages}

src/wechat_decrypt_tool/routers/chat.py

@@ -1391,6 +1391,299 @@ def _load_contact_top_flags(contact_db_path: Path, usernames: list[str]) -> dict
         conn.close()
 
 
+def _coerce_realtime_blobish_value(value: Any) -> Any:
+    if value is None:
+        return None
+    if isinstance(value, memoryview):
+        value = value.tobytes()
+    if isinstance(value, bytearray):
+        return bytes(value)
+    if isinstance(value, bytes):
+        try:
+            s = value.decode("ascii").strip()
+        except Exception:
+            return value
+        if not s:
+            return value
+        b = _hex_to_bytes(s)
+        if b is not None:
+            return b
+        if (len(s) % 2 == 0) and (_HEX_RE.fullmatch(s) is not None):
+            try:
+                return bytes.fromhex(s)
+            except Exception:
+                return value
+        return value
+    if isinstance(value, str):
+        s = value.strip()
+        if not s:
+            return value
+        b = _hex_to_bytes(s)
+        if b is not None:
+            return b
+        if (len(s) % 2 == 0) and (_HEX_RE.fullmatch(s) is not None):
+            try:
+                return bytes.fromhex(s)
+            except Exception:
+                return value
+        return value
+    return value
+
+
+def _normalize_realtime_message_item(item: dict[str, Any]) -> dict[str, Any]:
+    def _pick(*keys: str) -> Any:
+        return _pick_case_insensitive_value(item, *keys)
+
+    message_content = _coerce_realtime_blobish_value(
+        _pick("message_content", "messageContent", "MessageContent")
+    )
+    if message_content is None:
+        message_content = ""
+
+    return {
+        "local_id": int(_pick("local_id", "localId") or 0),
+        "server_id": int(_pick("server_id", "serverId", "MsgSvrID") or 0),
+        "local_type": int(_pick("local_type", "localType", "Type", "type") or 0),
+        "sort_seq": int(_pick("sort_seq", "sortSeq", "SortSeq") or 0),
+        "real_sender_id": int(_pick("real_sender_id", "realSenderId") or 0),
+        "create_time": int(_pick("create_time", "createTime", "CreateTime") or 0),
+        "message_content": message_content,
+        "compress_content": _coerce_realtime_blobish_value(
+            _pick("compress_content", "compressContent", "CompressContent")
+        ),
+        "packed_info_data": _coerce_realtime_blobish_value(
+            _pick("packed_info_data", "packedInfoData", "PackedInfoData")
+        ),
+        "sender_username": str(
+            _pick("sender_username", "senderUsername", "sender", "SenderUsername") or ""
+        ).strip(),
+    }
+
+
+def _collect_realtime_rows_for_session(
+    *,
+    trace_id: Optional[str],
+    account_name: str,
+    rt_conn: Any,
+    username: str,
+    msg_db_path_real: Path,
+    table_name: str,
+    max_local_id: int,
+    max_scan: int,
+    backfill_limit: int,
+) -> dict[str, Any]:
+    label = f"[{trace_id}]" if trace_id else "[realtime]"
+    log_fn = logger.info if trace_id else logger.debug
+    uname = str(username or "").strip()
+    use_biz_exec_query = uname.startswith("gh_") and ("biz_message" in str(msg_db_path_real.name).lower())
+
+    if use_biz_exec_query:
+        try:
+            quoted_table = _quote_ident(table_name)
+            select_cols = (
+                "local_id",
+                "server_id",
+                "local_type",
+                "sort_seq",
+                "real_sender_id",
+                "create_time",
+                "message_content",
+                "compress_content",
+                "packed_info_data",
+            )
+            select_sql = ", ".join([_quote_ident(col) for col in select_cols])
+
+            if int(max_local_id) > 0:
+                sql_new = (
+                    f"SELECT {select_sql} FROM {quoted_table} "
+                    f"WHERE local_id > {int(max_local_id)} "
+                    f"ORDER BY local_id ASC LIMIT {int(max_scan)}"
+                )
+            else:
+                sql_new = f"SELECT {select_sql} FROM {quoted_table} ORDER BY local_id DESC LIMIT {int(max_scan)}"
+
+            log_fn(
+                "%s wcdb_exec_query biz account=%s username=%s mode=new_rows max_local_id=%s limit=%s",
+                label,
+                account_name,
+                uname,
+                int(max_local_id),
+                int(max_scan),
+            )
+            wcdb_t0 = time.perf_counter()
+            with rt_conn.lock:
+                raw_new_rows = _wcdb_exec_query(rt_conn.handle, kind="message", path=str(msg_db_path_real), sql=sql_new)
+            wcdb_ms = (time.perf_counter() - wcdb_t0) * 1000.0
+            logger.info(
+                "%s wcdb_exec_query biz done account=%s username=%s mode=new_rows rows=%s ms=%.1f",
+                label,
+                account_name,
+                uname,
+                len(raw_new_rows or []),
+                wcdb_ms,
+            )
+            if wcdb_ms > 2000:
+                logger.warning(
+                    "%s wcdb_exec_query biz slow account=%s username=%s mode=new_rows ms=%.1f",
+                    label,
+                    account_name,
+                    uname,
+                    wcdb_ms,
+                )
+
+            normalized_new_rows: list[dict[str, Any]] = []
+            for item in raw_new_rows or []:
+                if not isinstance(item, dict):
+                    continue
+                norm = _normalize_realtime_message_item(item)
+                if int(norm.get("local_id") or 0) <= 0:
+                    continue
+                normalized_new_rows.append(norm)
+
+            if int(max_local_id) > 0:
+                new_rows = list(reversed(normalized_new_rows))
+            else:
+                new_rows = normalized_new_rows
+
+            backfill_rows: list[dict[str, Any]] = []
+            scanned = len(raw_new_rows or [])
+            if int(backfill_limit) > 0 and int(max_local_id) > 0:
+                sql_backfill = (
+                    f"SELECT {select_sql} FROM {quoted_table} "
+                    f"WHERE local_id <= {int(max_local_id)} "
+                    f"ORDER BY local_id DESC LIMIT {int(backfill_limit)}"
+                )
+                log_fn(
+                    "%s wcdb_exec_query biz account=%s username=%s mode=backfill limit=%s",
+                    label,
+                    account_name,
+                    uname,
+                    int(backfill_limit),
+                )
+                backfill_t0 = time.perf_counter()
+                with rt_conn.lock:
+                    raw_backfill_rows = _wcdb_exec_query(
+                        rt_conn.handle,
+                        kind="message",
+                        path=str(msg_db_path_real),
+                        sql=sql_backfill,
+                    )
+                backfill_ms = (time.perf_counter() - backfill_t0) * 1000.0
+                logger.info(
+                    "%s wcdb_exec_query biz done account=%s username=%s mode=backfill rows=%s ms=%.1f",
+                    label,
+                    account_name,
+                    uname,
+                    len(raw_backfill_rows or []),
+                    backfill_ms,
+                )
+                if backfill_ms > 2000:
+                    logger.warning(
+                        "%s wcdb_exec_query biz slow account=%s username=%s mode=backfill ms=%.1f",
+                        label,
+                        account_name,
+                        uname,
+                        backfill_ms,
+                    )
+                scanned += len(raw_backfill_rows or [])
+                for item in raw_backfill_rows or []:
+                    if not isinstance(item, dict):
+                        continue
+                    norm = _normalize_realtime_message_item(item)
+                    if int(norm.get("local_id") or 0) <= 0:
+                        continue
+                    backfill_rows.append(norm)
+
+            return {
+                "fetchMode": "biz_exec_query",
+                "scanned": int(scanned),
+                "new_rows": new_rows,
+                "backfill_rows": backfill_rows,
+            }
+        except Exception as e:
+            logger.warning(
+                "%s wcdb_exec_query biz failed account=%s username=%s err=%s fallback=wcdb_get_messages",
+                label,
+                account_name,
+                uname,
+                str(e),
+            )
+
+    batch_size = 200
+    scanned = 0
+    offset = 0
+    new_rows: list[dict[str, Any]] = []
+    backfill_rows: list[dict[str, Any]] = []
+    reached_existing = False
+    stop = False
+
+    while scanned < int(max_scan):
+        take = min(batch_size, int(max_scan) - scanned)
+        log_fn(
+            "%s wcdb_get_messages account=%s username=%s take=%s offset=%s",
+            label,
+            account_name,
+            uname,
+            int(take),
+            int(offset),
+        )
+        wcdb_t0 = time.perf_counter()
+        with rt_conn.lock:
+            raw_rows = _wcdb_get_messages(rt_conn.handle, uname, limit=take, offset=offset)
+        wcdb_ms = (time.perf_counter() - wcdb_t0) * 1000.0
+        log_fn(
+            "%s wcdb_get_messages done account=%s username=%s rows=%s ms=%.1f",
+            label,
+            account_name,
+            uname,
+            len(raw_rows or []),
+            wcdb_ms,
+        )
+        if wcdb_ms > 2000:
+            logger.warning(
+                "%s wcdb_get_messages slow account=%s username=%s ms=%.1f",
+                label,
+                account_name,
+                uname,
+                wcdb_ms,
+            )
+        if not raw_rows:
+            break
+
+        scanned += len(raw_rows)
+        offset += len(raw_rows)
+
+        for item in raw_rows:
+            if not isinstance(item, dict):
+                continue
+            norm = _normalize_realtime_message_item(item)
+            lid = int(norm.get("local_id") or 0)
+            if lid <= 0:
+                continue
+            if (not reached_existing) and lid > int(max_local_id):
+                new_rows.append(norm)
+                continue
+
+            reached_existing = True
+            if int(backfill_limit) <= 0:
+                stop = True
+                break
+            backfill_rows.append(norm)
+            if len(backfill_rows) >= int(backfill_limit):
+                stop = True
+                break
+
+        if stop or len(raw_rows) < take:
+            break
+
+    return {
+        "fetchMode": "wcdb_get_messages",
+        "scanned": int(scanned),
+        "new_rows": new_rows,
+        "backfill_rows": backfill_rows,
+    }
+
+
 @router.post("/api/chat/realtime/sync", summary="实时消息同步到解密库（按会话增量）")
 def sync_chat_realtime_messages(
     request: Request,
@@ -1511,118 +1804,20 @@ def sync_chat_realtime_messages(
 
             placeholders = ",".join(["?"] * len(insert_cols))
             insert_sql = f"INSERT OR IGNORE INTO {quoted_table} ({','.join(insert_cols)}) VALUES ({placeholders})"
-
-            def pick(item: dict[str, Any], *keys: str) -> Any:
-                for k in keys:
-                    if k in item and item[k] is not None:
-                        return item[k]
-                    lk = k.lower()
-                    for kk in item.keys():
-                        if str(kk).lower() == lk and item[kk] is not None:
-                            return item[kk]
-                return None
-
-            def normalize_blob(value: Any) -> Optional[bytes]:
-                if value is None:
-                    return None
-                if isinstance(value, memoryview):
-                    return value.tobytes()
-                if isinstance(value, (bytes, bytearray)):
-                    return bytes(value)
-                if isinstance(value, str):
-                    s = value.strip()
-                    if s.lower().startswith("0x"):
-                        s = s[2:]
-                    if s and re.fullmatch(r"[0-9a-fA-F]+", s) and (len(s) % 2 == 0):
-                        try:
-                            return bytes.fromhex(s)
-                        except Exception:
-                            return None
-                    return s.encode("utf-8", errors="ignore")
-                return None
-
-            def normalize(item: dict[str, Any]) -> dict[str, Any]:
-                return {
-                    "local_id": int(pick(item, "local_id", "localId") or 0),
-                    "server_id": int(pick(item, "server_id", "serverId", "MsgSvrID") or 0),
-                    "local_type": int(pick(item, "local_type", "localType", "Type", "type") or 0),
-                    "sort_seq": int(pick(item, "sort_seq", "sortSeq", "SortSeq") or 0),
-                    "real_sender_id": int(pick(item, "real_sender_id", "realSenderId") or 0),
-                    "create_time": int(pick(item, "create_time", "createTime", "CreateTime") or 0),
-                    "message_content": pick(item, "message_content", "messageContent", "MessageContent") or "",
-                    "compress_content": pick(item, "compress_content", "compressContent", "CompressContent"),
-                    "packed_info_data": normalize_blob(pick(item, "packed_info_data", "packedInfoData")),
-                    "sender_username": str(
-                        pick(item, "sender_username", "senderUsername", "sender", "SenderUsername") or ""
-                    ).strip(),
-                }
-
-            batch_size = 200
-            scanned = 0
-            offset = 0
-            new_rows: list[dict[str, Any]] = []
-            backfill_rows: list[dict[str, Any]] = []
-            reached_existing = False
-            stop = False
-
-            while scanned < int(max_scan):
-                take = min(batch_size, int(max_scan) - scanned)
-                logger.info(
-                    "[%s] wcdb_get_messages account=%s username=%s take=%s offset=%s",
-                    trace_id,
-                    account_dir.name,
-                    username,
-                    int(take),
-                    int(offset),
-                )
-                wcdb_t0 = time.perf_counter()
-                with rt_conn.lock:
-                    raw_rows = _wcdb_get_messages(rt_conn.handle, username, limit=take, offset=offset)
-                wcdb_ms = (time.perf_counter() - wcdb_t0) * 1000.0
-                logger.info(
-                    "[%s] wcdb_get_messages done account=%s username=%s rows=%s ms=%.1f",
-                    trace_id,
-                    account_dir.name,
-                    username,
-                    len(raw_rows or []),
-                    wcdb_ms,
-                )
-                if wcdb_ms > 2000:
-                    logger.warning(
-                        "[%s] wcdb_get_messages slow account=%s username=%s ms=%.1f",
-                        trace_id,
-                        account_dir.name,
-                        username,
-                        wcdb_ms,
-                    )
-                if not raw_rows:
-                    break
-
-                scanned += len(raw_rows)
-                offset += len(raw_rows)
-
-                for item in raw_rows:
-                    if not isinstance(item, dict):
-                        continue
-                    norm = normalize(item)
-                    lid = int(norm.get("local_id") or 0)
-                    if lid <= 0:
-                        continue
-                    if (not reached_existing) and lid > max_local_id:
-                        new_rows.append(norm)
-                        continue
-
-                    reached_existing = True
-                    if int(backfill_limit) <= 0:
-                        stop = True
-                        break
-                    backfill_rows.append(norm)
-                    if len(backfill_rows) >= int(backfill_limit):
-                        stop = True
-                        break
-
-                if stop or len(raw_rows) < take:
-                    break
+            fetch_result = _collect_realtime_rows_for_session(
+                trace_id=trace_id,
+                account_name=account_dir.name,
+                rt_conn=rt_conn,
+                username=username,
+                msg_db_path_real=msg_db_path_real,
+                table_name=table_name,
+                max_local_id=max_local_id,
+                max_scan=int(max_scan),
+                backfill_limit=int(backfill_limit),
+            )
+            scanned = int(fetch_result.get("scanned") or 0)
+            new_rows = list(fetch_result.get("new_rows") or [])
+            backfill_rows = list(fetch_result.get("backfill_rows") or [])
 
             inserted = 0
             backfilled = 0
@@ -1880,115 +2075,20 @@ def _sync_chat_realtime_messages_for_table(
 
         placeholders = ",".join(["?"] * len(insert_cols))
         insert_sql = f"INSERT OR IGNORE INTO {quoted_table} ({','.join(insert_cols)}) VALUES ({placeholders})"
-
-        def pick(item: dict[str, Any], *keys: str) -> Any:
-            for k in keys:
-                if k in item and item[k] is not None:
-                    return item[k]
-                lk = k.lower()
-                for kk in item.keys():
-                    if str(kk).lower() == lk and item[kk] is not None:
-                        return item[kk]
-            return None
-
-        def normalize_blob(value: Any) -> Optional[bytes]:
-            if value is None:
-                return None
-            if isinstance(value, memoryview):
-                return value.tobytes()
-            if isinstance(value, (bytes, bytearray)):
-                return bytes(value)
-            if isinstance(value, str):
-                s = value.strip()
-                if s.lower().startswith("0x"):
-                    s = s[2:]
-                if s and re.fullmatch(r"[0-9a-fA-F]+", s) and (len(s) % 2 == 0):
-                    try:
-                        return bytes.fromhex(s)
-                    except Exception:
-                        return None
-                return s.encode("utf-8", errors="ignore")
-            return None
-
-        def normalize(item: dict[str, Any]) -> dict[str, Any]:
-            return {
-                "local_id": int(pick(item, "local_id", "localId") or 0),
-                "server_id": int(pick(item, "server_id", "serverId", "MsgSvrID") or 0),
-                "local_type": int(pick(item, "local_type", "localType", "Type", "type") or 0),
-                "sort_seq": int(pick(item, "sort_seq", "sortSeq", "SortSeq") or 0),
-                "real_sender_id": int(pick(item, "real_sender_id", "realSenderId") or 0),
-                "create_time": int(pick(item, "create_time", "createTime", "CreateTime") or 0),
-                "message_content": pick(item, "message_content", "messageContent", "MessageContent") or "",
-                "compress_content": pick(item, "compress_content", "compressContent", "CompressContent"),
-                "packed_info_data": normalize_blob(pick(item, "packed_info_data", "packedInfoData")),
-                "sender_username": str(
-                    pick(item, "sender_username", "senderUsername", "sender", "SenderUsername") or ""
-                ).strip(),
-            }
-
-        batch_size = 200
-        scanned = 0
-        offset = 0
-        new_rows: list[dict[str, Any]] = []
-        backfill_rows: list[dict[str, Any]] = []
-        reached_existing = False
-        stop = False
-
-        while scanned < int(max_scan):
-            take = min(batch_size, int(max_scan) - scanned)
-            logger.debug(
-                "[realtime] wcdb_get_messages account=%s username=%s take=%s offset=%s",
-                account_dir.name,
-                username,
-                int(take),
-                int(offset),
-            )
-            wcdb_t0 = time.perf_counter()
-            with rt_conn.lock:
-                raw_rows = _wcdb_get_messages(rt_conn.handle, username, limit=take, offset=offset)
-            wcdb_ms = (time.perf_counter() - wcdb_t0) * 1000.0
-            logger.debug(
-                "[realtime] wcdb_get_messages done account=%s username=%s rows=%s ms=%.1f",
-                account_dir.name,
-                username,
-                len(raw_rows or []),
-                wcdb_ms,
-            )
-            if wcdb_ms > 2000:
-                logger.warning(
-                    "[realtime] wcdb_get_messages slow account=%s username=%s ms=%.1f",
-                    account_dir.name,
-                    username,
-                    wcdb_ms,
-                )
-            if not raw_rows:
-                break
-
-            scanned += len(raw_rows)
-            offset += len(raw_rows)
-
-            for item in raw_rows:
-                if not isinstance(item, dict):
-                    continue
-                norm = normalize(item)
-                lid = int(norm.get("local_id") or 0)
-                if lid <= 0:
-                    continue
-                if (not reached_existing) and lid > max_local_id:
-                    new_rows.append(norm)
-                    continue
-
-                reached_existing = True
-                if int(backfill_limit) <= 0:
-                    stop = True
-                    break
-                backfill_rows.append(norm)
-                if len(backfill_rows) >= int(backfill_limit):
-                    stop = True
-                    break
-
-            if stop or len(raw_rows) < take:
-                break
+        fetch_result = _collect_realtime_rows_for_session(
+            trace_id=None,
+            account_name=account_dir.name,
+            rt_conn=rt_conn,
+            username=username,
+            msg_db_path_real=msg_db_path_real,
+            table_name=table_name,
+            max_local_id=max_local_id,
+            max_scan=int(max_scan),
+            backfill_limit=int(backfill_limit),
+        )
+        scanned = int(fetch_result.get("scanned") or 0)
+        new_rows = list(fetch_result.get("new_rows") or [])
+        backfill_rows = list(fetch_result.get("backfill_rows") or [])
 
         inserted = 0
         backfilled = 0
@@ -2163,6 +2263,7 @@ def sync_chat_realtime_messages_all(
     priority_max_scan: int = 600,
     include_hidden: bool = True,
     include_official: bool = True,
+    only_official: bool = False,
     backfill_limit: int = 200,
 ):
     """
@@ -2173,13 +2274,14 @@ def sync_chat_realtime_messages_all(
     account_dir = _resolve_account_dir(account)
     trace_id = f"rt-syncall-{int(time.time() * 1000)}-{threading.get_ident()}"
     logger.info(
-        "[%s] realtime sync_all start account=%s max_scan=%s priority=%s include_hidden=%s include_official=%s",
+        "[%s] realtime sync_all start account=%s max_scan=%s priority=%s include_hidden=%s include_official=%s only_official=%s",
         trace_id,
         account_dir.name,
         int(max_scan),
         str(priority_username or "").strip(),
         bool(include_hidden),
         bool(include_official),
+        bool(only_official),
     )
 
     if max_scan < 20:
@@ -2241,6 +2343,8 @@ def sync_chat_realtime_messages_all(
                 hidden_val = 0
             if not include_hidden and hidden_val == 1:
                 continue
+            if only_official and not uname.startswith("gh_"):
+                continue
             if not _should_keep_session(uname, include_official=include_official):
                 continue
 

src/wechat_decrypt_tool/routers/chat_media.py

@@ -67,6 +67,87 @@ logger = get_logger(__name__)
 router = APIRouter(route_class=PathFixRoute)
 
 
+def _build_uncached_media_response(data: bytes, media_type: str) -> Response:
+    resp = Response(content=data, media_type=media_type)
+    resp.headers["Cache-Control"] = "no-store"
+    return resp
+
+
+def _image_candidate_variant_rank(path: Path) -> int:
+    stem = str(path.stem or "").lower()
+    if stem.endswith(("_b", ".b")):
+        return 0
+    if stem.endswith(("_h", ".h")):
+        return 1
+    if stem.endswith(("_c", ".c")):
+        return 3
+    if stem.endswith(("_t", ".t")):
+        return 4
+    return 2
+
+
+def _image_candidate_stat(path: Optional[Path]) -> tuple[int, float]:
+    if not path:
+        return 0, 0.0
+    try:
+        st = path.stat()
+        return int(st.st_size), float(st.st_mtime)
+    except Exception:
+        return 0, 0.0
+
+
+def _should_prefer_live_image_candidates(
+    *,
+    cached_path: Optional[Path],
+    live_candidates: list[Path],
+) -> bool:
+    if not live_candidates:
+        return False
+    if not cached_path:
+        return True
+
+    best_live = live_candidates[0]
+    live_rank = _image_candidate_variant_rank(best_live)
+    if live_rank < 2:
+        return True
+
+    cache_size, cache_mtime = _image_candidate_stat(cached_path)
+    live_size, live_mtime = _image_candidate_stat(best_live)
+    if live_rank == 2 and live_size > cache_size:
+        return True
+    if live_rank == 2 and live_size >= cache_size and live_mtime > cache_mtime:
+        return True
+    return False
+
+
+def _write_cached_chat_image(account_dir: Path, md5: str, data: bytes) -> None:
+    md5_norm = str(md5 or "").strip().lower()
+    if (not md5_norm) or (not data):
+        return
+
+    ext = _detect_image_extension(data)
+    out_path = _get_decrypted_resource_path(account_dir, md5_norm, ext)
+    out_path.parent.mkdir(parents=True, exist_ok=True)
+
+    for stale_ext in ("jpg", "png", "gif", "webp", "dat"):
+        stale_path = _get_decrypted_resource_path(account_dir, md5_norm, stale_ext)
+        if stale_path == out_path:
+            continue
+        try:
+            if stale_path.exists():
+                stale_path.unlink()
+        except Exception:
+            pass
+
+    try:
+        if out_path.exists() and out_path.read_bytes() == data:
+            return
+    except Exception:
+        pass
+
+    out_path.write_bytes(data)
+
+
 def _resolve_avatar_remote_url(*, account_dir: Path, username: str) -> str:
     u = str(username or "").strip()
     if not u:
@@ -1311,20 +1392,26 @@ async def get_chat_image(
             if md5_from_msg:
                 md5 = md5_from_msg
 
-    # md5 模式：优先从解密资源目录读取（更快）
+    cached_path: Optional[Path] = None
+    cached_data = b""
+    cached_media_type = "application/octet-stream"
+
+    # md5 模式：优先检查解密资源目录；如果微信目录里已经有更高质量版本，会在后面自动升级。
     if md5:
         decrypted_path = _try_find_decrypted_resource(account_dir, str(md5).lower())
         if decrypted_path:
             data = decrypted_path.read_bytes()
             media_type = _detect_image_media_type(data[:32])
             if media_type != "application/octet-stream" and _is_probably_valid_image(data, media_type):
-                return Response(content=data, media_type=media_type)
+                cached_path = decrypted_path
+                cached_data = data
+                cached_media_type = media_type
             # Corrupted cached file (e.g. wrong ext / partial data): remove and regenerate from source.
-            try:
-                if decrypted_path.suffix.lower() in {".jpg", ".jpeg", ".png", ".gif", ".webp"}:
+            elif decrypted_path.suffix.lower() in {".jpg", ".jpeg", ".png", ".gif", ".webp"}:
+                try:
                     decrypted_path.unlink()
-            except Exception:
-                pass
+                except Exception:
+                    pass
 
     # 回退：从微信数据目录实时定位并解密
     wxid_dir = _resolve_account_wxid_dir(account_dir)
@@ -1414,11 +1501,36 @@ async def get_chat_image(
                 break
 
     if not p:
+        if cached_path:
+            return _build_uncached_media_response(cached_data, cached_media_type)
         raise HTTPException(status_code=404, detail="Image not found.")
 
     candidates.extend(_iter_media_source_candidates(p))
     candidates = _order_media_candidates(candidates)
 
+    if cached_path:
+        try:
+            cached_key = str(cached_path.resolve())
+        except Exception:
+            cached_key = str(cached_path)
+
+        live_candidates: list[Path] = []
+        seen_live: set[str] = set()
+        for candidate in candidates:
+            try:
+                key = str(candidate.resolve())
+            except Exception:
+                key = str(candidate)
+            if key == cached_key or key in seen_live:
+                continue
+            seen_live.add(key)
+            live_candidates.append(candidate)
+
+        if _should_prefer_live_image_candidates(cached_path=cached_path, live_candidates=live_candidates):
+            candidates = [*live_candidates, cached_path]
+        else:
+            candidates = [cached_path, *live_candidates]
+
     logger.info(f"chat_image: md5={md5} file_id={file_id} candidates={len(candidates)} first={p}")
 
     data = b""
@@ -1443,19 +1555,14 @@ async def get_chat_image(
     # 仅在 md5 有效时缓存到 resource 目录；file_id 可能非常长，避免写入超长文件名
     if md5 and media_type.startswith("image/"):
         try:
-            out_md5 = str(md5).lower()
-            ext = _detect_image_extension(data)
-            out_path = _get_decrypted_resource_path(account_dir, out_md5, ext)
-            out_path.parent.mkdir(parents=True, exist_ok=True)
-            if not out_path.exists():
-                out_path.write_bytes(data)
+            _write_cached_chat_image(account_dir, str(md5), data)
         except Exception:
             pass
 
     logger.info(
         f"chat_image: md5={md5} file_id={file_id} chosen={chosen} media_type={media_type} bytes={len(data)}"
     )
-    return Response(content=data, media_type=media_type)
+    return _build_uncached_media_response(data, media_type)
 
 
 @router.get("/api/chat/media/emoji", summary="获取表情消息资源")

src/wechat_decrypt_tool/wcdb_realtime.py

@@ -26,6 +26,32 @@ _DEFAULT_WCDB_API_DLL = _NATIVE_DIR / "wcdb_api.dll"
 _WCDB_API_DLL_SELECTED: Optional[Path] = None
 
 
+def _iter_runtime_wcdb_api_dll_paths() -> tuple[Path, ...]:
+    candidates: list[Path] = []
+    seen: set[str] = set()
+
+    def add_anchor(anchor: str | Path | None) -> None:
+        if not anchor:
+            return
+        try:
+            base = Path(anchor).resolve()
+        except Exception:
+            base = Path(anchor)
+        candidate = base / "native" / "wcdb_api.dll"
+        key = str(candidate).replace("/", "\\").rstrip("\\").lower()
+        if key in seen:
+            return
+        seen.add(key)
+        candidates.append(candidate)
+
+    add_anchor(os.environ.get("WECHAT_TOOL_DATA_DIR", "").strip())
+    add_anchor(Path.cwd())
+    if getattr(sys, "frozen", False):
+        add_anchor(Path(sys.executable).resolve().parent)
+
+    return tuple(candidates)
+
+
 def _is_project_wcdb_api_dll_path(path: Path) -> bool:
     try:
         resolved = path.resolve(strict=False)
@@ -40,6 +66,14 @@ def _is_project_wcdb_api_dll_path(path: Path) -> bool:
     if resolved == default_resolved:
         return True
 
+    for candidate in _iter_runtime_wcdb_api_dll_paths():
+        try:
+            if resolved == candidate.resolve(strict=False):
+                return True
+        except Exception:
+            if resolved == candidate:
+                return True
+
     parts = tuple(str(part).lower() for part in resolved.parts)
     allowed_suffixes = (
         ("backend", "native", "wcdb_api.dll"),

tests/test_chat_media_image_cache_upgrade.py

@@ -0,0 +1,210 @@
+import hashlib
+import importlib
+import json
+import logging
+import os
+import sqlite3
+import sys
+import unittest
+from pathlib import Path
+from tempfile import TemporaryDirectory
+
+from fastapi import FastAPI
+from fastapi.testclient import TestClient
+
+
+ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(ROOT / "src"))
+
+
+class TestChatMediaImageCacheUpgrade(unittest.TestCase):
+    def _seed_contact_db(self, path: Path, *, account: str, username: str) -> None:
+        conn = sqlite3.connect(str(path))
+        try:
+            conn.execute(
+                """
+                CREATE TABLE contact (
+                    username TEXT,
+                    remark TEXT,
+                    nick_name TEXT,
+                    alias TEXT,
+                    local_type INTEGER,
+                    verify_flag INTEGER,
+                    big_head_url TEXT,
+                    small_head_url TEXT
+                )
+                """
+            )
+            conn.execute(
+                """
+                CREATE TABLE stranger (
+                    username TEXT,
+                    remark TEXT,
+                    nick_name TEXT,
+                    alias TEXT,
+                    local_type INTEGER,
+                    verify_flag INTEGER,
+                    big_head_url TEXT,
+                    small_head_url TEXT
+                )
+                """
+            )
+            conn.execute(
+                "INSERT INTO contact VALUES (?, ?, ?, ?, ?, ?, ?, ?)",
+                (account, "", "我", "", 1, 0, "", ""),
+            )
+            conn.execute(
+                "INSERT INTO contact VALUES (?, ?, ?, ?, ?, ?, ?, ?)",
+                (username, "", "测试好友", "", 1, 0, "", ""),
+            )
+            conn.commit()
+        finally:
+            conn.close()
+
+    def _seed_session_db(self, path: Path, *, username: str) -> None:
+        conn = sqlite3.connect(str(path))
+        try:
+            conn.execute(
+                """
+                CREATE TABLE SessionTable (
+                    username TEXT,
+                    is_hidden INTEGER,
+                    sort_timestamp INTEGER
+                )
+                """
+            )
+            conn.execute("INSERT INTO SessionTable VALUES (?, ?, ?)", (username, 0, 1735689600))
+            conn.commit()
+        finally:
+            conn.close()
+
+    def _seed_source_info(self, account_dir: Path, *, wxid_dir: Path) -> None:
+        payload = {
+            "wxid_dir": str(wxid_dir),
+            "db_storage_path": "",
+        }
+        (account_dir / "_source.json").write_text(json.dumps(payload, ensure_ascii=False), encoding="utf-8")
+
+    def _seed_cached_resource(self, account_dir: Path, *, md5: str, payload: bytes) -> Path:
+        resource_dir = account_dir / "resource" / md5[:2]
+        resource_dir.mkdir(parents=True, exist_ok=True)
+        target = resource_dir / f"{md5}.jpg"
+        target.write_bytes(payload)
+        return target
+
+    def _seed_live_variant(self, wxid_dir: Path, *, username: str, md5: str, suffix: str, payload: bytes) -> Path:
+        chat_hash = hashlib.md5(username.encode("utf-8")).hexdigest()
+        target = wxid_dir / "msg" / "attach" / chat_hash / "2026-03" / "Img" / f"{md5}{suffix}.dat"
+        target.parent.mkdir(parents=True, exist_ok=True)
+        target.write_bytes(payload)
+        return target
+
+    def _build_client(self):
+        import wechat_decrypt_tool.logging_config as logging_config
+        import wechat_decrypt_tool.app_paths as app_paths
+        import wechat_decrypt_tool.media_helpers as media_helpers
+        import wechat_decrypt_tool.routers.chat_media as chat_media
+
+        logging.shutdown()
+        importlib.reload(logging_config)
+        importlib.reload(app_paths)
+        importlib.reload(media_helpers)
+        importlib.reload(chat_media)
+
+        app = FastAPI()
+        app.include_router(chat_media.router)
+        return TestClient(app)
+
+    def test_live_high_variant_replaces_stale_cached_thumb(self):
+        with TemporaryDirectory() as td:
+            root = Path(td)
+            account = "wxid_test"
+            username = "wxid_friend"
+            md5 = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+
+            account_dir = root / "output" / "databases" / account
+            wxid_dir = root / "wxid_source"
+            account_dir.mkdir(parents=True, exist_ok=True)
+            wxid_dir.mkdir(parents=True, exist_ok=True)
+
+            self._seed_contact_db(account_dir / "contact.db", account=account, username=username)
+            self._seed_session_db(account_dir / "session.db", username=username)
+            self._seed_source_info(account_dir, wxid_dir=wxid_dir)
+
+            cached_thumb = b"\xff\xd8\xff\xd9"
+            live_original = b"\xff\xd8\xff\xe0" + (b"\x00" * 48) + b"\xff\xd9"
+            cache_path = self._seed_cached_resource(account_dir, md5=md5, payload=cached_thumb)
+            self._seed_live_variant(wxid_dir, username=username, md5=md5, suffix="_h", payload=live_original)
+
+            prev_data = os.environ.get("WECHAT_TOOL_DATA_DIR")
+            client = None
+            try:
+                os.environ["WECHAT_TOOL_DATA_DIR"] = str(root)
+                client = self._build_client()
+                resp = client.get(
+                    "/api/chat/media/image",
+                    params={"account": account, "md5": md5, "username": username},
+                )
+                self.assertEqual(resp.status_code, 200)
+                self.assertEqual(resp.content, live_original)
+                self.assertEqual(resp.headers.get("cache-control"), "no-store")
+                self.assertEqual(cache_path.read_bytes(), live_original)
+            finally:
+                try:
+                    client.close()
+                except Exception:
+                    pass
+                logging.shutdown()
+                if prev_data is None:
+                    os.environ.pop("WECHAT_TOOL_DATA_DIR", None)
+                else:
+                    os.environ["WECHAT_TOOL_DATA_DIR"] = prev_data
+
+    def test_cached_original_is_not_downgraded_by_live_thumb(self):
+        with TemporaryDirectory() as td:
+            root = Path(td)
+            account = "wxid_test"
+            username = "wxid_friend"
+            md5 = "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb"
+
+            account_dir = root / "output" / "databases" / account
+            wxid_dir = root / "wxid_source"
+            account_dir.mkdir(parents=True, exist_ok=True)
+            wxid_dir.mkdir(parents=True, exist_ok=True)
+
+            self._seed_contact_db(account_dir / "contact.db", account=account, username=username)
+            self._seed_session_db(account_dir / "session.db", username=username)
+            self._seed_source_info(account_dir, wxid_dir=wxid_dir)
+
+            cached_original = b"\xff\xd8\xff\xe0" + (b"\x11" * 64) + b"\xff\xd9"
+            live_thumb = b"\xff\xd8\xff\xd9"
+            cache_path = self._seed_cached_resource(account_dir, md5=md5, payload=cached_original)
+            self._seed_live_variant(wxid_dir, username=username, md5=md5, suffix="_t", payload=live_thumb)
+
+            prev_data = os.environ.get("WECHAT_TOOL_DATA_DIR")
+            client = None
+            try:
+                os.environ["WECHAT_TOOL_DATA_DIR"] = str(root)
+                client = self._build_client()
+                resp = client.get(
+                    "/api/chat/media/image",
+                    params={"account": account, "md5": md5, "username": username},
+                )
+                self.assertEqual(resp.status_code, 200)
+                self.assertEqual(resp.content, cached_original)
+                self.assertEqual(resp.headers.get("cache-control"), "no-store")
+                self.assertEqual(cache_path.read_bytes(), cached_original)
+            finally:
+                try:
+                    client.close()
+                except Exception:
+                    pass
+                logging.shutdown()
+                if prev_data is None:
+                    os.environ.pop("WECHAT_TOOL_DATA_DIR", None)
+                else:
+                    os.environ["WECHAT_TOOL_DATA_DIR"] = prev_data
+
+
+if __name__ == "__main__":
+    unittest.main()

tests/test_output_dir_override.py

@@ -0,0 +1,93 @@
+import importlib
+import logging
+import os
+import sys
+import unittest
+from pathlib import Path
+from tempfile import TemporaryDirectory
+
+
+ROOT = Path(__file__).resolve().parents[1]
+sys.path.insert(0, str(ROOT / "src"))
+
+
+def _close_logging_handlers() -> None:
+    for logger_name in ("", "uvicorn", "uvicorn.access", "uvicorn.error", "fastapi"):
+        lg = logging.getLogger(logger_name)
+        for handler in lg.handlers[:]:
+            try:
+                handler.close()
+            except Exception:
+                pass
+            try:
+                lg.removeHandler(handler)
+            except Exception:
+                pass
+
+
+class TestOutputDirOverride(unittest.TestCase):
+    def setUp(self) -> None:
+        self._prev_data_dir = os.environ.get("WECHAT_TOOL_DATA_DIR")
+        self._prev_output_dir = os.environ.get("WECHAT_TOOL_OUTPUT_DIR")
+        self._data_dir = TemporaryDirectory()
+        self._output_dir = TemporaryDirectory()
+        os.environ["WECHAT_TOOL_DATA_DIR"] = self._data_dir.name
+        os.environ["WECHAT_TOOL_OUTPUT_DIR"] = self._output_dir.name
+
+        import wechat_decrypt_tool.app_paths as app_paths
+        import wechat_decrypt_tool.key_store as key_store
+        import wechat_decrypt_tool.logging_config as logging_config
+        import wechat_decrypt_tool.runtime_settings as runtime_settings
+
+        importlib.reload(app_paths)
+        importlib.reload(logging_config)
+        importlib.reload(runtime_settings)
+        importlib.reload(key_store)
+
+        self.app_paths = app_paths
+        self.key_store = key_store
+        self.logging_config = logging_config
+        self.runtime_settings = runtime_settings
+
+    def tearDown(self) -> None:
+        _close_logging_handlers()
+        if self._prev_data_dir is None:
+            os.environ.pop("WECHAT_TOOL_DATA_DIR", None)
+        else:
+            os.environ["WECHAT_TOOL_DATA_DIR"] = self._prev_data_dir
+
+        if self._prev_output_dir is None:
+            os.environ.pop("WECHAT_TOOL_OUTPUT_DIR", None)
+        else:
+            os.environ["WECHAT_TOOL_OUTPUT_DIR"] = self._prev_output_dir
+
+        self._data_dir.cleanup()
+        self._output_dir.cleanup()
+
+    def test_app_paths_prefers_output_dir_override(self) -> None:
+        self.assertEqual(self.app_paths.get_output_dir(), Path(self._output_dir.name))
+        self.assertEqual(
+            self.app_paths.get_output_databases_dir(),
+            Path(self._output_dir.name) / "databases",
+        )
+
+    def test_logging_runtime_settings_and_key_store_use_output_override(self) -> None:
+        log_file = self.logging_config.setup_logging()
+        self.assertTrue(log_file.is_relative_to(Path(self._output_dir.name) / "logs"))
+
+        self.runtime_settings.write_backend_port_setting(12001)
+        runtime_settings_path = Path(self._output_dir.name) / "runtime_settings.json"
+        self.assertTrue(runtime_settings_path.exists())
+        self.assertEqual(self.runtime_settings.read_backend_port_setting(), 12001)
+
+        self.key_store.upsert_account_keys_in_store("wxid_test", db_key="abc123")
+        key_store_path = Path(self._output_dir.name) / "account_keys.json"
+        self.assertTrue(key_store_path.exists())
+        self.assertEqual(
+            self.key_store.get_account_keys_from_store("wxid_test").get("db_key"),
+            "abc123",
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()