fix(desktop-runtime): 修复桌面端重装后仍命中旧 UI 缓存

- 启动打包版时按 UI buildId 检测并清理 renderer 缓存
- 记录 lastSeenUiBuildId，避免每次启动都重复清缓存
- 调整 SPA 静态资源缓存策略，index.html/200.html/_payload.json 禁止缓存
- 保留 _nuxt 哈希资源长期缓存，减少必须在卸载时删除数据后才生效的问题

desktop/src/main.cjs

@@ -7,6 +7,7 @@ const {
   globalShortcut,
   dialog,
   shell,
+  session,
 } = require("electron");
 let autoUpdater = null;
 let autoUpdaterLoadError = null;
@@ -215,6 +216,161 @@ function getUserDataDir() {
   return resolveDataDir();
 }
 
+function sanitizeAccountName(account) {
+  const name = String(account || "").trim();
+  if (!name) throw new Error("缺少账号参数");
+  if (name === "." || name === "..") throw new Error("账号参数非法");
+  if (name.includes("/") || name.includes("\\")) throw new Error("账号参数非法");
+  return name;
+}
+
+function listDecryptedAccountsOnDisk(databasesDir) {
+  try {
+    if (!fs.existsSync(databasesDir)) return [];
+  } catch {
+    return [];
+  }
+
+  let entries = [];
+  try {
+    entries = fs.readdirSync(databasesDir, { withFileTypes: true });
+  } catch {
+    return [];
+  }
+
+  const accounts = [];
+  for (const entry of entries) {
+    try {
+      if (!entry || !entry.isDirectory()) continue;
+      const accountDir = path.join(databasesDir, entry.name);
+      const hasSession = fs.existsSync(path.join(accountDir, "session.db"));
+      const hasContact = fs.existsSync(path.join(accountDir, "contact.db"));
+      if (hasSession && hasContact) accounts.push(String(entry.name || ""));
+    } catch {}
+  }
+  accounts.sort((a, b) => a.localeCompare(b));
+  return accounts;
+}
+
+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 databasesDir = path.join(outputDir, "databases");
+  const accountName = sanitizeAccountName(account);
+
+  const base = path.resolve(databasesDir);
+  const accountDir = path.resolve(path.join(databasesDir, accountName));
+  if (accountDir !== base && !accountDir.startsWith(base + path.sep)) {
+    throw new Error("账号路径非法");
+  }
+
+  return {
+    dataDir,
+    outputDir,
+    databasesDir,
+    accountName,
+    accountDir,
+  };
+}
+
+function getAccountInfoFromDisk(account) {
+  const { accountName, accountDir } = resolveAccountDirInOutput(account);
+  if (!fs.existsSync(accountDir) || !fs.statSync(accountDir).isDirectory()) {
+    throw new Error("账号数据不存在");
+  }
+
+  let entries = [];
+  try {
+    entries = fs.readdirSync(accountDir, { withFileTypes: true });
+  } catch {}
+  const dbFiles = entries
+    .filter((e) => !!e && e.isFile() && String(e.name || "").toLowerCase().endsWith(".db"))
+    .map((e) => String(e.name || ""))
+    .sort((a, b) => a.localeCompare(b));
+
+  let sessionUpdatedAt = 0;
+  try {
+    const st = fs.statSync(path.join(accountDir, "session.db"));
+    sessionUpdatedAt = Math.floor(Number(st?.mtimeMs || 0) / 1000);
+  } catch {}
+
+  return {
+    status: "success",
+    account: accountName,
+    path: accountDir,
+    database_count: dbFiles.length,
+    databases: dbFiles,
+    session_updated_at: sessionUpdatedAt,
+  };
+}
+
+function removeAccountFromKeyStore(dataDir, accountName) {
+  const keyStorePath = path.join(dataDir, "output", "account_keys.json");
+  try {
+    if (!fs.existsSync(keyStorePath)) return false;
+    const raw = fs.readFileSync(keyStorePath, { encoding: "utf8" });
+    const parsed = JSON.parse(raw || "{}");
+    if (!parsed || typeof parsed !== "object" || Array.isArray(parsed)) return false;
+    if (!Object.prototype.hasOwnProperty.call(parsed, accountName)) return false;
+    delete parsed[accountName];
+    fs.writeFileSync(keyStorePath, JSON.stringify(parsed, null, 2), { encoding: "utf8" });
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+async function deleteAccountDataFromDisk(account) {
+  const { dataDir, outputDir, databasesDir, accountName, accountDir } = resolveAccountDirInOutput(account);
+  if (!fs.existsSync(accountDir) || !fs.statSync(accountDir).isDirectory()) {
+    throw new Error("账号数据不存在");
+  }
+
+  const wasBackendRunning = !!backendProc;
+  let restartError = null;
+  let result = null;
+
+  if (wasBackendRunning) {
+    await stopBackendAndWait({ timeoutMs: 10_000 });
+  }
+
+  try {
+    const exportsDir = path.join(outputDir, "exports", accountName);
+    try {
+      fs.rmSync(exportsDir, { recursive: true, force: true });
+    } catch {}
+
+    fs.rmSync(accountDir, { recursive: true, force: true });
+    const removedKeyCache = removeAccountFromKeyStore(dataDir, accountName);
+    const accounts = listDecryptedAccountsOnDisk(databasesDir);
+    result = {
+      status: "success",
+      deleted_account: accountName,
+      accounts,
+      default_account: accounts.length ? accounts[0] : null,
+      removed_key_cache: removedKeyCache,
+    };
+  } finally {
+    if (wasBackendRunning) {
+      try {
+        startBackend();
+        await waitForBackend({ timeoutMs: 30_000 });
+      } catch (err) {
+        restartError = err;
+        logMain(`[main] failed to restart backend after deleteAccountData: ${err?.message || err}`);
+      }
+    }
+  }
+
+  if (restartError) {
+    throw new Error(`删除完成，但后端重启失败：${restartError?.message || restartError}`);
+  }
+  if (!result) throw new Error("删除账号数据失败");
+  return result;
+}
+
 function getExeDir() {
   try {
     return path.dirname(process.execPath);
@@ -310,6 +466,34 @@ function getDesktopSettingsPath() {
   return path.join(dir, "desktop-settings.json");
 }
 
+function getPackagedUiDir() {
+  if (!app.isPackaged) return null;
+  try {
+    return path.join(process.resourcesPath, "ui");
+  } catch {
+    return null;
+  }
+}
+
+function readPackagedUiBuildId() {
+  const uiDir = getPackagedUiDir();
+  if (!uiDir) return "";
+
+  try {
+    const indexPath = path.join(uiDir, "index.html");
+    if (!fs.existsSync(indexPath)) return "";
+    const html = fs.readFileSync(indexPath, { encoding: "utf8" });
+    const match =
+      html.match(/buildId:"([^"]+)"/) ||
+      html.match(/\/_payload\.json\?([^"'&<>\s]+)/) ||
+      html.match(/data-src="\/_payload\.json\?([^"]+)"/);
+    return String(match?.[1] || "").trim();
+  } catch (err) {
+    logMain(`[main] failed to read packaged UI build id: ${err?.message || err}`);
+    return "";
+  }
+}
+
 function loadDesktopSettings() {
   if (desktopSettings) return desktopSettings;
 
@@ -321,6 +505,9 @@ function loadDesktopSettings() {
     ignoredUpdateVersion: "",
     // Backend (FastAPI) listens on this port. Used in packaged builds.
     backendPort: DEFAULT_BACKEND_PORT,
+    // Tracks the packaged UI build so we can invalidate Chromium's HTTP cache
+    // after upgrades without wiping user data/localStorage.
+    lastSeenUiBuildId: "",
   };
 
   const p = getDesktopSettingsPath();
@@ -384,6 +571,33 @@ function setIgnoredUpdateVersion(version) {
   return desktopSettings.ignoredUpdateVersion;
 }
 
+async function refreshRendererCacheForPackagedUi() {
+  if (!app.isPackaged) return;
+
+  const nextBuildId = readPackagedUiBuildId();
+  if (!nextBuildId) return;
+
+  const prevBuildId = String(loadDesktopSettings()?.lastSeenUiBuildId || "").trim();
+  if (prevBuildId === nextBuildId) return;
+
+  try {
+    const ses = session?.defaultSession;
+    if (ses) {
+      await ses.clearCache();
+      try {
+        await ses.clearStorageData({ storages: ["serviceworkers"] });
+      } catch {}
+    }
+    logMain(`[main] cleared renderer cache for UI build change: ${prevBuildId || "(none)"} -> ${nextBuildId}`);
+  } catch (err) {
+    logMain(`[main] failed to clear renderer cache for UI build change: ${err?.message || err}`);
+  }
+
+  loadDesktopSettings();
+  desktopSettings.lastSeenUiBuildId = nextBuildId;
+  persistDesktopSettings();
+}
+
 function parseEnvBool(value) {
   if (value == null) return null;
   const v = String(value).trim().toLowerCase();
@@ -1384,6 +1598,22 @@ function registerWindowIpc() {
     }
   });
 
+  ipcMain.handle("app:getAccountInfo", async (_event, account) => {
+    try {
+      return getAccountInfoFromDisk(account);
+    } catch (e) {
+      throw new Error(e?.message || String(e));
+    }
+  });
+
+  ipcMain.handle("app:deleteAccountData", async (_event, account) => {
+    try {
+      return await deleteAccountDataFromDisk(account);
+    } catch (e) {
+      throw new Error(e?.message || String(e));
+    }
+  });
+
   ipcMain.handle("app:checkForUpdates", async () => {
     return await checkForUpdatesInternal();
   });
@@ -1443,6 +1673,7 @@ function registerWindowIpc() {
 
 async function main() {
   await app.whenReady();
+  await refreshRendererCacheForPackagedUi();
   Menu.setApplicationMenu(null);
   registerWindowIpc();
   registerDebugShortcuts();

desktop/src/preload.cjs

@@ -22,6 +22,8 @@ contextBridge.exposeInMainWorld("wechatDesktop", {
   // Data/output folder helpers
   getOutputDir: () => ipcRenderer.invoke("app:getOutputDir"),
   openOutputDir: () => ipcRenderer.invoke("app:openOutputDir"),
+  getAccountInfo: (account) => ipcRenderer.invoke("app:getAccountInfo", String(account || "")),
+  deleteAccountData: (account) => ipcRenderer.invoke("app:deleteAccountData", String(account || "")),
 
   // Auto update
   getVersion: () => ipcRenderer.invoke("app:getVersion"),

frontend/components/SettingsDialog.vue

@@ -63,186 +63,202 @@
           </div>
 
           <section ref="desktopSectionRef">
-            <div class="mb-3 text-[12px] font-bold text-[#999] tracking-widest">桌面行为</div>
-            
-            <div class="space-y-3">
-              <div class="flex items-center justify-between gap-3">
-                <div class="min-w-0 flex-1">
-                  <div class="text-[13px] font-medium text-[#222]">开机自启动</div>
-                  <div class="mt-0.5 text-[11px] text-[#909090]">系统登录后自动启动桌面端应用</div>
-                </div>
-                <button
-                  type="button"
-                  role="switch"
-                  :aria-checked="desktopAutoLaunch"
-                  class="settings-switch shrink-0"
-                  :class="switchTrackClass(desktopAutoLaunch, !isDesktopEnv || desktopAutoLaunchLoading)"
-                  :disabled="!isDesktopEnv || desktopAutoLaunchLoading"
-                  @click="toggleDesktopAutoLaunch"
-                >
-                  <span class="settings-switch-thumb" :class="desktopAutoLaunch ? 'translate-x-[20px]' : 'translate-x-0'" />
-                </button>
-              </div>
-              <div v-if="desktopAutoLaunchError" class="text-xs text-red-600 whitespace-pre-wrap -mt-2">
-                {{ desktopAutoLaunchError }}
-              </div>
-
-              <div class="flex items-center justify-between gap-3">
-                <div class="min-w-0 flex-1">
-                  <div class="text-[13px] font-medium text-[#222]">关闭窗口行为</div>
-                  <div class="mt-0.5 text-[11px] text-[#909090]">点击关闭按钮时：默认最小化到托盘</div>
-                </div>
-                <select
-                  class="shrink-0 rounded-[6px] border border-[#e2e2e2] bg-white px-2 py-1 text-[12px] text-[#333] outline-none transition focus:border-[#07b75b] focus:ring-1 focus:ring-[#07b75b]/30"
-                  :disabled="!isDesktopEnv || desktopCloseBehaviorLoading"
-                  :value="desktopCloseBehavior"
-                  @change="onDesktopCloseBehaviorChange"
-                >
-                  <option value="tray">最小化到托盘</option>
-                  <option value="exit">直接退出</option>
-                </select>
-              </div>
-              <div v-if="desktopCloseBehaviorError" class="text-xs text-red-600 whitespace-pre-wrap -mt-2">
-                {{ desktopCloseBehaviorError }}
-              </div>
-
-              <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]">后端端口</div>
-                  <div class="mt-0.5 text-[11px] text-[#909090]">桌面端：重启内置后端并刷新；网页端：尝试切换端口</div>
-                </div>
-                <div class="flex shrink-0 items-center gap-1.5">
-                  <input
-                    v-model="desktopBackendPortInput"
-                    type="number"
-                    min="1"
-                    max="65535"
-                    class="w-16 rounded-[6px] border border-[#e2e2e2] bg-white px-2 py-1 text-center text-[12px] tabular-nums text-[#333] outline-none transition focus:border-[#07b75b] focus:ring-1 focus:ring-[#07b75b]/30"
-                    :disabled="desktopBackendPortLoading || desktopBackendPortApplying"
-                    @keyup.enter="onDesktopBackendPortApply"
-                  />
+            <div class="mb-2.5 text-[12px] font-bold text-[#999] tracking-widest">桌面行为</div>
+            <div class="overflow-hidden rounded-[10px] border border-[#e7e7e7] bg-white divide-y divide-[#ececec]">
+              <div class="px-3.5 py-3">
+                <div class="flex items-center justify-between gap-3">
+                  <div class="min-w-0 flex-1">
+                    <div class="text-[13px] font-medium text-[#222]">开机自启动</div>
+                    <div class="mt-0.5 text-[11px] text-[#909090]">系统登录后自动启动桌面端应用</div>
+                  </div>
                   <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="desktopBackendPortLoading || desktopBackendPortApplying"
-                    @click="onDesktopBackendPortApply"
+                    role="switch"
+                    :aria-checked="desktopAutoLaunch"
+                    class="settings-switch shrink-0"
+                    :class="switchTrackClass(desktopAutoLaunch, !isDesktopEnv || desktopAutoLaunchLoading)"
+                    :disabled="!isDesktopEnv || desktopAutoLaunchLoading"
+                    @click="toggleDesktopAutoLaunch"
                   >
-                    {{ desktopBackendPortApplying ? '...' : '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="desktopBackendPortLoading || desktopBackendPortApplying"
-                    @click="onDesktopBackendPortReset"
-                  >
-                    恢复默认
+                    <span class="settings-switch-thumb" :class="desktopAutoLaunch ? 'translate-x-[20px]' : 'translate-x-0'" />
                   </button>
                 </div>
-              </div>
-              <div v-if="desktopBackendPortError" class="text-xs text-red-600 whitespace-pre-wrap -mt-1.5">
-                {{ desktopBackendPortError }}
+                <div v-if="desktopAutoLaunchError" class="mt-1.5 text-[11px] text-red-600 whitespace-pre-wrap">
+                  {{ desktopAutoLaunchError }}
+                </div>
               </div>
 
-              <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="px-3.5 py-3">
+                <div class="flex items-center justify-between gap-3">
+                  <div class="min-w-0 flex-1">
+                    <div class="text-[13px] font-medium text-[#222]">关闭窗口行为</div>
+                    <div class="mt-0.5 text-[11px] text-[#909090]">点击关闭按钮时：默认最小化到托盘</div>
+                  </div>
+                  <select
+                    class="shrink-0 rounded-[6px] border border-[#e2e2e2] bg-white px-2 py-1 text-[12px] text-[#333] outline-none transition focus:border-[#07b75b] focus:ring-1 focus:ring-[#07b75b]/30"
+                    :disabled="!isDesktopEnv || desktopCloseBehaviorLoading"
+                    :value="desktopCloseBehavior"
+                    @change="onDesktopCloseBehaviorChange"
+                  >
+                    <option value="tray">最小化到托盘</option>
+                    <option value="exit">直接退出</option>
+                  </select>
+                </div>
+                <div v-if="desktopCloseBehaviorError" class="mt-1.5 text-[11px] text-red-600 whitespace-pre-wrap">
+                  {{ desktopCloseBehaviorError }}
                 </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="text-xs text-red-600 whitespace-pre-wrap -mt-1.5">
-                {{ desktopOutputDirError }}
+
+              <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]">后端端口</div>
+                    <div class="mt-0.5 text-[11px] text-[#909090]">桌面端：重启内置后端并刷新；网页端：尝试切换端口</div>
+                  </div>
+                  <div class="flex shrink-0 items-center gap-1.5">
+                    <input
+                      v-model="desktopBackendPortInput"
+                      type="number"
+                      min="1"
+                      max="65535"
+                      class="w-16 rounded-[6px] border border-[#e2e2e2] bg-white px-2 py-1 text-center text-[12px] tabular-nums text-[#333] outline-none transition focus:border-[#07b75b] focus:ring-1 focus:ring-[#07b75b]/30"
+                      :disabled="desktopBackendPortLoading || desktopBackendPortApplying"
+                      @keyup.enter="onDesktopBackendPortApply"
+                    />
+                    <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="desktopBackendPortLoading || desktopBackendPortApplying"
+                      @click="onDesktopBackendPortApply"
+                    >
+                      {{ desktopBackendPortApplying ? '...' : '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="desktopBackendPortLoading || desktopBackendPortApplying"
+                      @click="onDesktopBackendPortReset"
+                    >
+                      恢复默认
+                    </button>
+                  </div>
+                </div>
+                <div v-if="desktopBackendPortError" class="mt-1.5 text-[11px] text-red-600 whitespace-pre-wrap">
+                  {{ desktopBackendPortError }}
+                </div>
+              </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>
+                  <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 }}
+                </div>
               </div>
             </div>
           </section>
 
           <section ref="startupSectionRef">
-            <div class="mb-3 text-[12px] font-bold text-[#999] tracking-widest">启动偏好</div>
-            
-            <div class="space-y-3">
-              <div class="flex items-center justify-between gap-3">
-                <div class="min-w-0 flex-1">
-                  <div class="text-[13px] font-medium text-[#222]">启动后自动开启实时获取</div>
-                  <div class="mt-0.5 text-[11px] text-[#909090]">进入聊天页后自动打开“实时开关”</div>
+            <div class="mb-2.5 text-[12px] font-bold text-[#999] tracking-widest">启动偏好</div>
+            <div class="overflow-hidden rounded-[10px] border border-[#e7e7e7] bg-white divide-y divide-[#ececec]">
+              <div class="px-3.5 py-3">
+                <div class="flex items-center justify-between gap-3">
+                  <div class="min-w-0 flex-1">
+                    <div class="text-[13px] font-medium text-[#222]">启动后自动开启实时获取</div>
+                    <div class="mt-0.5 text-[11px] text-[#909090]">进入聊天页后自动打开“实时开关”</div>
+                  </div>
+                  <button
+                    type="button"
+                    role="switch"
+                    :aria-checked="desktopAutoRealtime"
+                    class="settings-switch shrink-0"
+                    :class="switchTrackClass(desktopAutoRealtime)"
+                    @click="toggleDesktopAutoRealtime"
+                  >
+                    <span class="settings-switch-thumb" :class="desktopAutoRealtime ? 'translate-x-[20px]' : 'translate-x-0'" />
+                  </button>
                 </div>
-                <button
-                  type="button"
-                  role="switch"
-                  :aria-checked="desktopAutoRealtime"
-                  class="settings-switch shrink-0"
-                  :class="switchTrackClass(desktopAutoRealtime)"
-                  @click="toggleDesktopAutoRealtime"
-                >
-                  <span class="settings-switch-thumb" :class="desktopAutoRealtime ? 'translate-x-[20px]' : 'translate-x-0'" />
-                </button>
               </div>
 
-              <div class="flex items-center justify-between gap-3">
-                <div class="min-w-0 flex-1">
-                  <div class="text-[13px] font-medium text-[#222]">有数据时默认进入聊天页</div>
-                  <div class="mt-0.5 text-[11px] text-[#909090]">有已解密账号时，打开应用跳转到 /chat</div>
+              <div class="px-3.5 py-3">
+                <div class="flex items-center justify-between gap-3">
+                  <div class="min-w-0 flex-1">
+                    <div class="text-[13px] font-medium text-[#222]">有数据时默认进入聊天页</div>
+                    <div class="mt-0.5 text-[11px] text-[#909090]">有已解密账号时，打开应用跳转到 /chat</div>
+                  </div>
+                  <button
+                    type="button"
+                    role="switch"
+                    :aria-checked="desktopDefaultToChatWhenData"
+                    class="settings-switch shrink-0"
+                    :class="switchTrackClass(desktopDefaultToChatWhenData)"
+                    @click="toggleDesktopDefaultToChat"
+                  >
+                    <span class="settings-switch-thumb" :class="desktopDefaultToChatWhenData ? 'translate-x-[20px]' : 'translate-x-0'" />
+                  </button>
                 </div>
-                <button
-                  type="button"
-                  role="switch"
-                  :aria-checked="desktopDefaultToChatWhenData"
-                  class="settings-switch shrink-0"
-                  :class="switchTrackClass(desktopDefaultToChatWhenData)"
-                  @click="toggleDesktopDefaultToChat"
-                >
-                  <span class="settings-switch-thumb" :class="desktopDefaultToChatWhenData ? 'translate-x-[20px]' : 'translate-x-0'" />
-                </button>
               </div>
             </div>
           </section>
 
           <section ref="updatesSectionRef">
-            <div class="mb-3 text-[12px] font-bold text-[#999] tracking-widest">更新</div>
-            
-            <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]">当前版本</div>
-                <div class="mt-0.5 text-[11px] text-[#909090]">{{ desktopVersionText }}</div>
+            <div class="mb-2.5 text-[12px] font-bold text-[#999] tracking-widest">更新</div>
+            <div class="overflow-hidden rounded-[10px] border border-[#e7e7e7] bg-white divide-y divide-[#ececec]">
+              <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]">当前版本</div>
+                    <div class="mt-0.5 text-[11px] text-[#909090]">{{ desktopVersionText }}</div>
+                  </div>
+                  <button
+                    type="button"
+                    class="shrink-0 rounded-[6px] border border-[#e2e2e2] bg-[#fafafa] px-2.5 py-1 text-[12px] text-[#222] transition hover:bg-[#f0f0f0] disabled:cursor-not-allowed disabled:opacity-50"
+                    :disabled="!isDesktopEnv || desktopUpdate.manualCheckLoading.value"
+                    @click="onDesktopCheckUpdates"
+                  >
+                    {{ desktopUpdate.manualCheckLoading.value ? '检查中...' : '检查桌面版更新' }}
+                  </button>
+                </div>
+                <div v-if="desktopUpdate.lastCheckMessage.value" class="mt-2 rounded-[6px] bg-[#f9f9f9] border border-[#eee] px-2.5 py-1.5 text-[11px] text-[#666] whitespace-pre-wrap break-words">
+                  {{ desktopUpdate.lastCheckMessage.value }}
+                </div>
               </div>
-              <button
-                type="button"
-                class="shrink-0 rounded-[6px] border border-[#e2e2e2] bg-[#fafafa] px-2.5 py-1 text-[12px] text-[#222] transition hover:bg-[#f0f0f0] disabled:cursor-not-allowed disabled:opacity-50"
-                :disabled="!isDesktopEnv || desktopUpdate.manualCheckLoading.value"
-                @click="onDesktopCheckUpdates"
-              >
-                {{ desktopUpdate.manualCheckLoading.value ? '检查中...' : '检查桌面版更新' }}
-              </button>
-            </div>
-            <div v-if="desktopUpdate.lastCheckMessage.value" class="mt-2 rounded-[6px] bg-[#f9f9f9] border border-[#eee] px-2.5 py-1.5 text-[11px] text-[#666] whitespace-pre-wrap break-words">
-              {{ desktopUpdate.lastCheckMessage.value }}
             </div>
           </section>
 
           <section ref="snsSectionRef">
-            <div class="mb-3 text-[12px] font-bold text-[#999] tracking-widest">朋友圈</div>
-            
-            <div class="flex items-center justify-between gap-3">
-              <div class="min-w-0 flex-1">
-                <div class="text-[13px] font-medium text-[#222]">朋友圈图片使用缓存</div>
-                <div class="mt-0.5 text-[11px] text-[#909090]">开启：下载解密失败时回退本地缓存（默认）；关闭：始终重新下载</div>
+            <div class="mb-2.5 text-[12px] font-bold text-[#999] tracking-widest">朋友圈</div>
+            <div class="overflow-hidden rounded-[10px] border border-[#e7e7e7] bg-white divide-y divide-[#ececec]">
+              <div class="px-3.5 py-3">
+                <div class="flex items-center justify-between gap-3">
+                  <div class="min-w-0 flex-1">
+                    <div class="text-[13px] font-medium text-[#222]">朋友圈图片使用缓存</div>
+                    <div class="mt-0.5 text-[11px] text-[#909090]">开启：下载解密失败时回退本地缓存（默认）；关闭：始终重新下载</div>
+                  </div>
+                  <button
+                    type="button"
+                    role="switch"
+                    :aria-checked="snsUseCache"
+                    class="settings-switch shrink-0"
+                    :class="switchTrackClass(snsUseCache)"
+                    @click="toggleSnsUseCache"
+                  >
+                    <span class="settings-switch-thumb" :class="snsUseCache ? 'translate-x-[20px]' : 'translate-x-0'" />
+                  </button>
+                </div>
               </div>
-              <button
-                type="button"
-                role="switch"
-                :aria-checked="snsUseCache"
-                class="settings-switch shrink-0"
-                :class="switchTrackClass(snsUseCache)"
-                @click="toggleSnsUseCache"
-              >
-                <span class="settings-switch-thumb" :class="snsUseCache ? 'translate-x-[20px]' : 'translate-x-0'" />
-              </button>
             </div>
           </section>
 

frontend/components/SidebarRail.vue

@@ -6,7 +6,12 @@
     <div class="flex-1 flex flex-col justify-start pt-0 gap-0">
       <!-- Avatar -->
       <div class="w-full h-[60px] flex items-center justify-center">
-        <div class="w-[40px] h-[40px] rounded-md overflow-hidden bg-gray-300 flex-shrink-0">
+        <button
+          type="button"
+          class="group relative w-[40px] h-[40px] rounded-md overflow-hidden bg-gray-300 flex-shrink-0 ring-1 ring-transparent transition hover:ring-[#07b75b]/40"
+          title="账号信息"
+          @click="openAccountDialog"
+        >
           <img v-if="selfAvatarUrl" :src="selfAvatarUrl" alt="avatar" class="w-full h-full object-cover" />
           <div
             v-else
@@ -15,7 +20,7 @@
           >
             我
           </div>
-        </div>
+        </button>
       </div>
 
       <!-- Chat -->
@@ -164,22 +169,116 @@
         </div>
       </div>
 
-      <!-- Settings -->
-      <div
-        class="w-full h-[var(--sidebar-rail-step)] flex items-center justify-center cursor-pointer group"
-        @click="goSettings"
-        title="设置"
-      >
-        <div class="w-[var(--sidebar-rail-btn)] h-[var(--sidebar-rail-btn)] rounded-md flex items-center justify-center transition-colors bg-transparent group-hover:bg-[#E1E1E1]">
-          <svg class="w-[var(--sidebar-rail-icon)] h-[var(--sidebar-rail-icon)]" :class="settingsDialogOpen ? 'text-[#07b75b]' : 'text-[#5d5d5d]'" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5">
-            <path
-              stroke-linecap="round"
-              stroke-linejoin="round"
-              d="M10.325 4.317c.426-1.756 2.924-1.756 3.35 0a1.724 1.724 0 002.573 1.066c1.543-.94 3.31.826 2.37 2.37a1.724 1.724 0 001.065 2.572c1.756.426 1.756 2.924 0 3.35a1.724 1.724 0 00-1.066 2.573c.94 1.543-.826 3.31-2.37 2.37a1.724 1.724 0 00-2.572 1.065c-.426 1.756-2.924 1.756-3.35 0a1.724 1.724 0 00-2.573-1.066c-1.543.94-3.31-.826-2.37-2.37a1.724 1.724 0 00-1.065-2.572c-1.756-.426-1.756-2.924 0-3.35a1.724 1.724 0 001.066-2.573c-.94-1.543.826-3.31 2.37-2.37.996.608 2.296.07 2.572-1.065z"
-            />
-            <path stroke-linecap="round" stroke-linejoin="round" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
-          </svg>
+      <div class="mt-auto">
+        <!-- Guide -->
+        <div
+          class="w-full h-[var(--sidebar-rail-step)] flex items-center justify-center cursor-pointer group"
+          title="引导页"
+          @click="goGuide"
+        >
+          <div class="w-[var(--sidebar-rail-btn)] h-[var(--sidebar-rail-btn)] rounded-md flex items-center justify-center transition-colors bg-transparent group-hover:bg-[#E1E1E1]">
+            <svg class="w-[var(--sidebar-rail-icon)] h-[var(--sidebar-rail-icon)] text-[#5d5d5d]" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.8" stroke-linecap="round" stroke-linejoin="round" aria-hidden="true">
+              <path d="M3 10.5L12 3l9 7.5" />
+              <path d="M5 9.5V20h14V9.5" />
+              <path d="M10 20v-6h4v6" />
+            </svg>
+          </div>
         </div>
+
+        <!-- Settings -->
+        <div
+          class="w-full h-[var(--sidebar-rail-step)] flex items-center justify-center cursor-pointer group"
+          @click="goSettings"
+          title="设置"
+        >
+          <div class="w-[var(--sidebar-rail-btn)] h-[var(--sidebar-rail-btn)] rounded-md flex items-center justify-center transition-colors bg-transparent group-hover:bg-[#E1E1E1]">
+            <svg class="w-[var(--sidebar-rail-icon)] h-[var(--sidebar-rail-icon)]" :class="settingsDialogOpen ? 'text-[#07b75b]' : 'text-[#5d5d5d]'" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5">
+              <path
+                stroke-linecap="round"
+                stroke-linejoin="round"
+                d="M10.325 4.317c.426-1.756 2.924-1.756 3.35 0a1.724 1.724 0 002.573 1.066c1.543-.94 3.31.826 2.37 2.37a1.724 1.724 0 001.065 2.572c1.756.426 1.756 2.924 0 3.35a1.724 1.724 0 00-1.066 2.573c.94 1.543-.826 3.31-2.37 2.37a1.724 1.724 0 00-2.572 1.065c-.426 1.756-2.924 1.756-3.35 0a1.724 1.724 0 00-2.573-1.066c-1.543.94-3.31-.826-2.37-2.37a1.724 1.724 0 00-1.065-2.572c-1.756-.426-1.756-2.924 0-3.35a1.724 1.724 0 001.066-2.573c-.94-1.543.826-3.31 2.37-2.37.996.608 2.296.07 2.572-1.065z"
+              />
+              <path stroke-linecap="round" stroke-linejoin="round" d="M15 12a3 3 0 11-6 0 3 3 0 016 0z" />
+            </svg>
+          </div>
+        </div>
+      </div>
+    </div>
+  </div>
+
+  <div
+    v-if="accountDialogOpen"
+    class="fixed inset-0 z-[130] flex items-center justify-center bg-black/35 px-4"
+    @click.self="closeAccountDialog"
+  >
+    <div class="w-full max-w-[440px] overflow-hidden rounded-[12px] border border-[#e7e7e7] bg-white shadow-2xl">
+      <div class="flex items-center justify-between border-b border-[#efefef] px-4 py-3">
+        <div class="text-[14px] font-semibold text-[#222]">当前账号信息</div>
+        <button
+          type="button"
+          class="flex h-7 w-7 items-center justify-center rounded-md text-[#888] transition hover:bg-[#f2f2f2] hover:text-[#222]"
+          title="关闭"
+          :disabled="accountDeleteLoading"
+          @click="closeAccountDialog"
+        >
+          <svg class="h-4 w-4" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" aria-hidden="true">
+            <path d="M6 6l12 12M18 6L6 18" />
+          </svg>
+        </button>
+      </div>
+
+      <div class="space-y-3 px-4 py-4">
+        <div v-if="accountInfoLoading" class="text-[12px] text-[#7a7a7a]">正在加载账号信息...</div>
+        <template v-else>
+          <div class="flex items-center gap-3">
+            <div class="w-[42px] h-[42px] rounded-md overflow-hidden bg-gray-300 flex-shrink-0">
+              <img v-if="selfAvatarUrl" :src="selfAvatarUrl" alt="avatar" class="w-full h-full object-cover" />
+              <div
+                v-else
+                class="w-full h-full flex items-center justify-center text-white text-xs font-bold"
+                :style="{ backgroundColor: '#4B5563' }"
+              >
+                我
+              </div>
+            </div>
+            <div class="min-w-0 flex-1">
+              <div class="truncate text-[14px] font-semibold text-[#222]">{{ selectedAccount || '未选择账号' }}</div>
+              <div class="mt-0.5 text-[11px] text-[#8a8a8a]">账号标识（wxid）</div>
+            </div>
+          </div>
+
+          <div class="rounded-[8px] border border-[#ededed] bg-[#fafafa] px-3 py-2 text-[12px] text-[#5f5f5f] space-y-1.5">
+            <div class="flex items-start justify-between gap-3">
+              <span class="text-[#8a8a8a] shrink-0">数据库数量</span>
+              <span class="font-medium text-[#333]">{{ accountInfo?.database_count ?? '—' }}</span>
+            </div>
+            <div class="flex items-start justify-between gap-3">
+              <span class="text-[#8a8a8a] shrink-0">数据目录</span>
+              <span class="break-all text-right text-[#444]">{{ accountInfo?.path || (selectedAccount ? `output/databases/${selectedAccount}` : '—') }}</span>
+            </div>
+            <div class="flex items-start justify-between gap-3">
+              <span class="text-[#8a8a8a] shrink-0">最近会话库更新时间</span>
+              <span class="text-[#444]">{{ sessionUpdatedAtText }}</span>
+            </div>
+          </div>
+        </template>
+
+        <div class="rounded-[8px] border border-amber-200 bg-amber-50 px-3 py-2 text-[12px] leading-relaxed text-amber-900">
+          仅删除本项目中的该账号解析数据/缓存/编辑记录，不会删除微信客户端中的任何聊天内容或账号数据。
+        </div>
+
+        <button
+          type="button"
+          class="w-full rounded-[8px] border border-red-200 bg-red-50 px-3 py-2 text-[12px] font-medium text-red-700 transition hover:bg-red-100 disabled:cursor-not-allowed disabled:opacity-50"
+          :disabled="!selectedAccount || accountDeleteLoading"
+          @click="deleteCurrentAccountData"
+        >
+          {{ accountDeleteLoading ? '删除中...' : '删除当前账号的项目数据' }}
+        </button>
+        <div class="text-[11px] text-[#8a8a8a]">删除成功后将自动返回引导页。</div>
+
+        <div v-if="accountInfoError" class="text-[11px] text-red-600 whitespace-pre-wrap">{{ accountInfoError }}</div>
+        <div v-if="accountDeleteError" class="text-[11px] text-red-600 whitespace-pre-wrap">{{ accountDeleteError }}</div>
       </div>
     </div>
   </div>
@@ -202,9 +301,130 @@ const { privacyMode } = storeToRefs(privacyStore)
 const realtimeStore = useChatRealtimeStore()
 const { enabled: realtimeEnabled, available: realtimeAvailable, checking: realtimeChecking, statusError: realtimeStatusError, toggling: realtimeToggling } = storeToRefs(realtimeStore)
 const { open: settingsDialogOpen, openDialog: openSettingsDialog } = useSettingsDialog()
+const { getChatAccountInfo, deleteChatAccount } = useApi()
+
+const accountDialogOpen = ref(false)
+const accountInfoLoading = ref(false)
+const accountInfoError = ref('')
+const accountInfo = ref(null)
+const accountDeleteLoading = ref(false)
+const accountDeleteError = ref('')
+const accountInfoApiUnsupported = ref(false)
+const deleteAccountApiUnsupported = ref(false)
+
+const sessionUpdatedAtText = computed(() => {
+  const ts = Number(accountInfo.value?.session_updated_at || 0)
+  if (!Number.isFinite(ts) || ts <= 0) return '—'
+  try {
+    return new Date(ts * 1000).toLocaleString('zh-CN')
+  } catch {
+    return '—'
+  }
+})
+
+const isNotFoundError = (error) => {
+  const status = Number(
+    error?.statusCode
+    ?? error?.status
+    ?? error?.response?.status
+    ?? error?.data?.statusCode
+    ?? 0
+  )
+  return status === 404
+}
+
+const loadAccountInfoByDesktopBridge = async (account) => {
+  if (!process.client || typeof window === 'undefined') return null
+  if (!window.wechatDesktop?.getAccountInfo) return null
+  const res = await window.wechatDesktop.getAccountInfo(account)
+  return res && typeof res === 'object' ? res : null
+}
+
+const loadAccountInfo = async () => {
+  accountInfoLoading.value = true
+  accountInfoError.value = ''
+  const account = String(selectedAccount.value || '').trim()
+  if (!account) {
+    accountInfo.value = null
+    accountInfoLoading.value = false
+    return
+  }
+  try {
+    let lastError = null
+    if (!accountInfoApiUnsupported.value) {
+      try {
+        const res = await getChatAccountInfo({ account })
+        if (res?.status !== 'success') {
+          throw new Error(res?.message || '读取账号信息失败')
+        }
+        accountInfo.value = res
+        return
+      } catch (e) {
+        lastError = e
+        if (isNotFoundError(e)) {
+          accountInfoApiUnsupported.value = true
+        }
+      }
+    }
+
+    try {
+      const fallback = await loadAccountInfoByDesktopBridge(account)
+      if (fallback?.status === 'success') {
+        accountInfo.value = fallback
+        accountInfoError.value = ''
+        return
+      }
+      if (fallback && fallback?.status && fallback.status !== 'success') {
+        lastError = new Error(fallback?.message || '读取账号信息失败')
+      } else if (!lastError) {
+        lastError = new Error('读取账号信息失败')
+      }
+    } catch (fallbackErr) {
+      if (!lastError) {
+        lastError = fallbackErr
+      }
+    }
+
+    accountInfo.value = null
+    accountInfoError.value = lastError?.message || '读取账号信息失败'
+  } finally {
+    accountInfoLoading.value = false
+  }
+}
+
+const deleteAccountDataByDesktopBridge = async (account) => {
+  if (!process.client || typeof window === 'undefined') return null
+  if (!window.wechatDesktop?.deleteAccountData) return null
+  const res = await window.wechatDesktop.deleteAccountData(account)
+  return res && typeof res === 'object' ? res : { status: 'success' }
+}
+
+const openAccountDialog = async () => {
+  accountDialogOpen.value = true
+  accountDeleteError.value = ''
+  await loadAccountInfo()
+}
+
+const closeAccountDialog = () => {
+  if (accountDeleteLoading.value) return
+  accountDialogOpen.value = false
+}
+
+watch(selectedAccount, () => {
+  if (!accountDialogOpen.value) return
+  void loadAccountInfo()
+})
 
 onMounted(async () => {
   await chatAccounts.ensureLoaded()
+  if (process.client && typeof window !== 'undefined') {
+    window.addEventListener('keydown', onWindowKeydown)
+  }
+})
+
+onBeforeUnmount(() => {
+  if (!process.client || typeof window === 'undefined') return
+  window.removeEventListener('keydown', onWindowKeydown)
 })
 
 const apiBase = useApiBase()
@@ -240,10 +460,73 @@ const goWrapped = async () => {
   await navigateTo('/wrapped')
 }
 
+const goGuide = async () => {
+  await navigateTo('/')
+}
+
 const goSettings = () => {
   openSettingsDialog()
 }
 
+const onWindowKeydown = (event) => {
+  if (event?.key !== 'Escape') return
+  if (!accountDialogOpen.value) return
+  event.preventDefault()
+  closeAccountDialog()
+}
+
+const deleteCurrentAccountData = async () => {
+  const account = String(selectedAccount.value || '').trim()
+  if (!account || accountDeleteLoading.value) return
+
+  if (process.client && typeof window !== 'undefined') {
+    const confirmed = window.confirm(
+      '将删除当前账号在本项目中的数据（解析缓存、编辑记录、导出缓存等），不会删除微信客户端内容。确认删除吗？'
+    )
+    if (!confirmed) return
+  }
+
+  accountDeleteLoading.value = true
+  accountDeleteError.value = ''
+  try {
+    let deleted = false
+    let lastError = null
+
+    if (!deleteAccountApiUnsupported.value) {
+      try {
+        const apiRes = await deleteChatAccount({ account })
+        if (apiRes?.status && apiRes.status !== 'success') {
+          throw new Error(apiRes?.message || '删除账号数据失败')
+        }
+        deleted = true
+      } catch (apiErr) {
+        lastError = apiErr
+        if (isNotFoundError(apiErr)) {
+          deleteAccountApiUnsupported.value = true
+        }
+      }
+    }
+
+    if (!deleted) {
+      const desktopRes = await deleteAccountDataByDesktopBridge(account)
+      if (!desktopRes) {
+        throw lastError || new Error('删除账号数据失败')
+      }
+      if (desktopRes?.status && desktopRes.status !== 'success') {
+        throw new Error(desktopRes?.message || '删除账号数据失败')
+      }
+    }
+
+    accountDialogOpen.value = false
+    await chatAccounts.ensureLoaded({ force: true })
+    await navigateTo('/')
+  } catch (e) {
+    accountDeleteError.value = e?.message || '删除账号数据失败'
+  } finally {
+    accountDeleteLoading.value = false
+  }
+}
+
 const realtimeBusy = computed(() => !!realtimeChecking.value || !!realtimeToggling.value)
 
 const realtimeTitle = computed(() => {

frontend/composables/useApi.js

@@ -60,6 +60,22 @@ export const useApi = () => {
     return await request('/chat/accounts')
   }
 
+  const getChatAccountInfo = async (params = {}) => {
+    const query = new URLSearchParams()
+    if (params && params.account) query.set('account', params.account)
+    const url = '/chat/account_info' + (query.toString() ? `?${query.toString()}` : '')
+    return await request(url)
+  }
+
+  const deleteChatAccount = async (params = {}) => {
+    const account = String(params?.account || '').trim()
+    if (!account) throw new Error('Missing account')
+    const query = new URLSearchParams()
+    query.set('account', account)
+    const url = '/chat/account' + (query.toString() ? `?${query.toString()}` : '')
+    return await request(url, { method: 'DELETE' })
+  }
+
   const listChatSessions = async (params = {}) => {
     const query = new URLSearchParams()
     if (params && params.account) query.set('account', params.account)
@@ -540,6 +556,8 @@ export const useApi = () => {
     decryptDatabase,
     healthCheck,
     listChatAccounts,
+    getChatAccountInfo,
+    deleteChatAccount,
     listChatSessions,
     listChatMessages,
     getChatMessageRaw,

src/wechat_decrypt_tool/api.py

@@ -99,9 +99,36 @@ class _SPAStaticFiles(StaticFiles):
         self._fallback_200 = Path(str(self.directory)) / "200.html"
         self._fallback_index = Path(str(self.directory)) / "index.html"
 
-    async def get_response(self, path: str, scope):  # type: ignore[override]
+    @staticmethod
+    def _normalize_path(path: str) -> str:
+        return str(path or "").strip().lstrip("/")
+
+    @classmethod
+    def _is_shell_path(cls, path: str) -> bool:
+        normalized = cls._normalize_path(path)
+        return normalized in {"", "index.html", "200.html", "_payload.json"} or normalized.startswith(
+            "_payload.json/"
+        )
+
+    @classmethod
+    def _apply_cache_headers(cls, path: str, response):
+        normalized = cls._normalize_path(path)
         try:
-            return await super().get_response(path, scope)
+            if cls._is_shell_path(normalized):
+                response.headers["Cache-Control"] = "no-store, no-cache, must-revalidate"
+                response.headers["Pragma"] = "no-cache"
+                response.headers["Expires"] = "0"
+            elif normalized.startswith("_nuxt/"):
+                response.headers.setdefault("Cache-Control", "public, max-age=31536000, immutable")
+        except Exception:
+            pass
+        return response
+
+    async def get_response(self, path: str, scope):  # type: ignore[override]
+        normalized = self._normalize_path(path)
+        try:
+            response = await super().get_response(path, scope)
+            return self._apply_cache_headers(normalized, response)
         except StarletteHTTPException as exc:
             if exc.status_code != 404:
                 raise
@@ -112,8 +139,8 @@ class _SPAStaticFiles(StaticFiles):
                 raise
 
             if self._fallback_200.exists():
-                return FileResponse(str(self._fallback_200))
-            return FileResponse(str(self._fallback_index))
+                return self._apply_cache_headers("200.html", FileResponse(str(self._fallback_200)))
+            return self._apply_cache_headers("index.html", FileResponse(str(self._fallback_index)))
 
 
 def _maybe_mount_frontend() -> None:

src/wechat_decrypt_tool/chat_edit_store.py

@@ -485,3 +485,30 @@ def update_message_edit_local_id(
                 conn.close()
         except Exception:
             pass
+
+
+def delete_account_edits(account: str) -> int:
+    a = str(account or "").strip()
+    if not a:
+        return 0
+
+    conn: Optional[sqlite3.Connection] = None
+    try:
+        conn = _connect()
+        cur = conn.execute(
+            """
+            DELETE FROM message_edits
+            WHERE account = ?
+            """,
+            (a,),
+        )
+        conn.commit()
+        return int(getattr(cur, "rowcount", 0) or 0)
+    except Exception:
+        return 0
+    finally:
+        try:
+            if conn is not None:
+                conn.close()
+        except Exception:
+            pass

src/wechat_decrypt_tool/key_store.py

@@ -67,3 +67,20 @@ def upsert_account_keys_in_store(
         pass
 
     return item
+
+
+def remove_account_keys_from_store(account: str) -> bool:
+    account = str(account or "").strip()
+    if not account:
+        return False
+
+    store = load_account_keys_store()
+    if account not in store:
+        return False
+
+    try:
+        store.pop(account, None)
+        _atomic_write_json(_KEY_STORE_PATH, store)
+        return True
+    except Exception:
+        return False

src/wechat_decrypt_tool/routers/chat.py

@@ -3,6 +3,7 @@ import re
 import sqlite3
 import asyncio
 import json
+import shutil
 import time
 import threading
 from datetime import datetime, timedelta
@@ -67,6 +68,8 @@ from ..chat_helpers import (
 )
 from ..media_helpers import _resolve_account_db_storage_dir, _try_find_decrypted_resource
 from .. import chat_edit_store
+from ..app_paths import get_output_dir
+from ..key_store import remove_account_keys_from_store
 from ..path_fix import PathFixRoute
 from ..session_last_message import (
     build_session_last_message_table,
@@ -3496,6 +3499,85 @@ async def list_chat_accounts():
     }
 
 
+@router.get("/api/chat/account_info", summary="获取当前账号信息")
+def get_chat_account_info(account: Optional[str] = None):
+    account_dir = _resolve_account_dir(account)
+    db_files = sorted([p.name for p in account_dir.glob("*.db") if p.is_file()])
+
+    session_db = account_dir / "session.db"
+    session_updated_at = 0
+    try:
+        session_updated_at = int(session_db.stat().st_mtime)
+    except Exception:
+        session_updated_at = 0
+
+    return {
+        "status": "success",
+        "account": account_dir.name,
+        "path": str(account_dir),
+        "database_count": len(db_files),
+        "databases": db_files,
+        "session_updated_at": session_updated_at,
+    }
+
+
+@router.delete("/api/chat/account", summary="删除当前账号在本项目中的数据")
+def delete_chat_account(account: str):
+    account_name = str(account or "").strip()
+    if not account_name:
+        raise HTTPException(status_code=400, detail="Missing account.")
+
+    account_dir = _resolve_account_dir(account_name)
+
+    # Best-effort: close realtime connections first, otherwise Windows may keep db files locked.
+    try:
+        WCDB_REALTIME.disconnect(account_name)
+    except Exception:
+        pass
+
+    with _REALTIME_SYNC_MU:
+        _REALTIME_SYNC_ALL_LOCKS.pop(account_name, None)
+        stale_lock_keys = [k for k in _REALTIME_SYNC_LOCKS.keys() if k and k[0] == account_name]
+        for k in stale_lock_keys:
+            _REALTIME_SYNC_LOCKS.pop(k, None)
+
+    removed_edit_count = 0
+    try:
+        removed_edit_count = int(chat_edit_store.delete_account_edits(account_name) or 0)
+    except Exception:
+        removed_edit_count = 0
+
+    removed_key_cache = False
+    try:
+        removed_key_cache = bool(remove_account_keys_from_store(account_name))
+    except Exception:
+        removed_key_cache = False
+
+    output_dir = get_output_dir()
+    exports_dir = output_dir / "exports" / account_name
+    if exports_dir.exists():
+        try:
+            shutil.rmtree(exports_dir)
+        except Exception:
+            # Ignore export cleanup failure; account dir removal is the core operation.
+            pass
+
+    try:
+        shutil.rmtree(account_dir)
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=f"删除账号数据失败：{e}")
+
+    accounts = _list_decrypted_accounts()
+    return {
+        "status": "success",
+        "deleted_account": account_name,
+        "accounts": accounts,
+        "default_account": accounts[0] if accounts else None,
+        "removed_edit_count": removed_edit_count,
+        "removed_key_cache": removed_key_cache,
+    }
+
+
 @router.get("/api/chat/sessions", summary="获取会话列表（聊天左侧列表）")
 def list_chat_sessions(
     request: Request,