feat: add "All Mail" view

app/(main)/[locale]/page.tsx

@@ -11,8 +11,9 @@ import type { ComposerDraftData } from "@/components/email/email-composer";
 import { ProtocolAccountPicker } from "@/components/protocol/protocol-account-picker";
 import { ThreadConversationView } from "@/components/email/thread-conversation-view";
 import { MobileHeader } from "@/components/layout/mobile-header";
-import { ThreadGroup, Email, isUnifiedMailboxId, UNIFIED_ROLE_BY_ID } from "@/lib/jmap/types";
+import { ThreadGroup, Email, isUnifiedMailboxId, UNIFIED_ROLE_BY_ID, ALL_MAIL_MAILBOX_ID } from "@/lib/jmap/types";
 import { useAccountStore } from "@/stores/account-store";
+import { usePolicyStore } from "@/stores/policy-store";
 import type { UnifiedAccountClient } from "@/lib/unified-mailbox";
 import { KeyboardShortcutsModal } from "@/components/keyboard-shortcuts-modal";
 import { useEmailStore, buildUnifiedAccountClients } from "@/stores/email-store";
@@ -341,7 +342,10 @@ export default function Home() {
   useProMultiAccountMailboxes();
 
   const enableUnifiedMailbox = useSettingsStore((s) => s.enableUnifiedMailbox);
+  const enableAllMailView = useSettingsStore((s) => s.enableAllMailView);
   const delayedSendSupported = client?.hasDelayedSend() ?? true;
+  const allMailViewEnabled = usePolicyStore((s) => s.isFeatureEnabled('allMailViewEnabled'));
+  const showAllMailMailbox = allMailViewEnabled && enableAllMailView;
   const activeEmails = isScheduledView ? scheduledEmails : emails;
   const activeHasMore = isScheduledView ? scheduledHasMore : hasMoreEmails;
   const activeIsLoading = isScheduledView ? isLoadingScheduled : isLoading;
@@ -2213,7 +2217,11 @@ export default function Home() {
   }
 
   // Get current mailbox name for mobile header
-  const currentMailboxName = isScheduledView ? t('sidebar.scheduled') : mailboxes.find(m => m.id === selectedMailbox)?.name || "Inbox";
+  const currentMailboxName = isScheduledView
+    ? t('sidebar.scheduled')
+    : selectedMailbox === ALL_MAIL_MAILBOX_ID
+      ? t('sidebar.mailboxes.all_mail')
+      : mailboxes.find(m => m.id === selectedMailbox)?.name || "Inbox";
   const isFocusedMailLayout = mailLayout === 'focus';
   const isHorizontalMailLayout = mailLayout === 'horizontal' && !isMobile && !isTablet;
   const hasViewerContent = showComposer || Boolean(conversationThread) || Boolean(selectedEmail);
@@ -2475,6 +2483,7 @@ export default function Home() {
               selectedKeyword={selectedKeyword}
               scheduledTotal={scheduledTotal}
               showScheduledMailbox={delayedSendSupported}
+              showAllMailMailbox={showAllMailMailbox}
               onMailboxSelect={handleMailboxSelect}
               onTagSelect={handleTagSelect}
               onUnreadFilterClick={handleUnreadFilterClick}

app/(main)/[locale]/settings/page.tsx

@@ -183,6 +183,7 @@ const tabSearchPaths: Record<Tab, string[]> = {
     'settings.appearance.hide_account_switcher',
     'settings.appearance.show_rail_account_list',
     'settings.appearance.unified_mailbox',
+    'settings.appearance.all_mail',
     'settings.appearance.colorful_sidebar_icons',
     'settings.email_behavior.mail_layout',
   ],

app/(main)/admin/_tabs/policy.tsx

@@ -21,6 +21,7 @@ const FEATURE_GATE_LABELS: Partial<Record<keyof FeatureGates, { label: string; d
   folderIconsEnabled: { label: 'Folder Icons', description: 'Allow custom folder icon picker' },
   hoverActionsConfigEnabled: { label: 'Hover Actions Config', description: 'Allow users to customize email hover actions' },
   filesEnabled: { label: 'Files (WebDAV)', description: 'Enable file storage via WebDAV. WARNING: Large uploads can cause Stalwart/RocksDB instability. Not recommended for production.' },
+  allMailViewEnabled: { label: 'All Mail View', description: 'Show a virtual "All Mail" folder that merges messages from across an account’s folders into one list. Users choose which folders are included.' },
 };
 
 const RESTRICTABLE_SETTINGS = [

components/layout/sidebar.tsx

@@ -33,6 +33,7 @@ import {
   NotebookPen,
   CalendarClock,
   BellOff,
+  Mails,
 } from "lucide-react";
 import { cn, buildMailboxTree, MailboxNode } from "@/lib/utils";
 import { Mailbox } from "@/lib/jmap/types";
@@ -76,6 +77,8 @@ interface SidebarProps {
   onRefreshMailboxes?: () => void;
   scheduledTotal?: number;
   showScheduledMailbox?: boolean;
+  /** Gated "All Mail" virtual folder that merges all of the account's folders. */
+  showAllMailMailbox?: boolean;
   className?: string;
   /**
    * Multi-account (Pro) mode props. When `multiAccountMode` is true, the
@@ -678,6 +681,7 @@ export function Sidebar({
   onRefreshMailboxes,
   scheduledTotal = 0,
   showScheduledMailbox = false,
+  showAllMailMailbox = false,
   className,
   multiAccountMode = false,
   accountMailboxes,
@@ -978,6 +982,16 @@ export function Sidebar({
 
       {/* Mailbox List */}
       <div className="flex-1 overflow-y-auto" data-tour="sidebar">
+        {showAllMailMailbox && (
+          <SidebarRow
+            icon={<Mails className={cn("w-4 h-4 flex-shrink-0", selectedMailbox === '__all_mail__' ? "text-foreground" : "text-muted-foreground")} />}
+            label={t('mailboxes.all_mail')}
+            depth={0}
+            isSelected={!selectedKeyword && selectedMailbox === '__all_mail__'}
+            onClick={() => onMailboxSelect?.('__all_mail__')}
+            isCollapsed={isCollapsed}
+          />
+        )}
         {showUnified && (
           <div>
             <SidebarSectionHeader

components/settings/layout-settings.tsx

@@ -2,6 +2,7 @@
 
 import { useMemo } from 'react';
 import { useTranslations } from 'next-intl';
+import { Check, Folder } from 'lucide-react';
 import { useSettingsStore, type ToolbarPosition, type MailLayout } from '@/stores/settings-store';
 import { SettingsSection, SettingItem, RadioGroup, ToggleSwitch } from './settings-section';
 import { cn } from '@/lib/utils';
@@ -117,11 +118,27 @@ function MailLayoutPreview({
 export function LayoutSettings() {
   const t = useTranslations('settings.appearance');
   const tEmail = useTranslations('settings.email_behavior');
-  const { toolbarPosition, showToolbarLabels, hideAccountSwitcher, showRailAccountList, enableUnifiedMailbox, includeGroupInUnified, colorfulSidebarIcons, mailLayout, proInterface, updateSetting } = useSettingsStore();
+  const { toolbarPosition, showToolbarLabels, hideAccountSwitcher, showRailAccountList, enableUnifiedMailbox, includeGroupInUnified, enableAllMailView, allMailFolderIds, colorfulSidebarIcons, mailLayout, proInterface, updateSetting } = useSettingsStore();
-  const { isSettingLocked, isSettingHidden } = usePolicyStore();
+  const { isSettingLocked, isSettingHidden, isFeatureEnabled } = usePolicyStore();
   const accounts = useAccountStore(s => s.accounts);
   const mailboxes = useEmailStore(s => s.mailboxes);
   const hasGroupInboxes = useMemo(() => mailboxes.some(m => m.isShared), [mailboxes]);
+  const allMailViewAllowed = isFeatureEnabled('allMailViewEnabled');
+
+  // Own (non-shared) folders and the current All Mail selection. `null` =
+  // never configured, which defaults to all non-special (no-role) folders.
+  const ownMailboxes = useMemo(() => mailboxes.filter(m => !m.isShared), [mailboxes]);
+  const allMailSelected = new Set(
+    allMailFolderIds === null
+      ? ownMailboxes.filter(m => !m.role).map(m => m.id)
+      : allMailFolderIds
+  );
+  const toggleAllMailFolder = (id: string) => {
+    const next = new Set(allMailSelected);
+    if (next.has(id)) next.delete(id);
+    else next.add(id);
+    updateSetting('allMailFolderIds', ownMailboxes.filter(m => next.has(m.id)).map(m => m.id));
+  };
 
   return (
     <SettingsSection title={t('title')} description={t('description')}>
@@ -209,6 +226,56 @@ export function LayoutSettings() {
         </div>
       )}
 
+      {allMailViewAllowed && !isSettingHidden('enableAllMailView') && (
+        <SettingItem
+          label={t('all_mail.label')}
+          description={t('all_mail.description')}
+          locked={isSettingLocked('enableAllMailView')}
+        >
+          <ToggleSwitch
+            checked={enableAllMailView}
+            onChange={(v) => updateSetting('enableAllMailView', v)}
+          />
+        </SettingItem>
+      )}
+
+      {allMailViewAllowed && enableAllMailView && (
+        <div className="ml-4 border-l-2 border-border pl-4 -mt-2 space-y-2">
+          <div>
+            <div className="text-sm font-medium text-foreground">{t('all_mail.folders_label')}</div>
+            <div className="text-xs text-muted-foreground">{t('all_mail.folders_description')}</div>
+          </div>
+          {ownMailboxes.length === 0 ? (
+            <p className="text-xs text-muted-foreground">{t('all_mail.no_folders')}</p>
+          ) : (
+            <div className="space-y-0.5">
+              {ownMailboxes.map((mb) => {
+                const checked = allMailSelected.has(mb.id);
+                return (
+                  <button
+                    key={mb.id}
+                    type="button"
+                    onClick={() => toggleAllMailFolder(mb.id)}
+                    className="w-full flex items-center gap-2.5 py-1.5 px-2 rounded-md hover:bg-muted/50 text-left"
+                    role="checkbox"
+                    aria-checked={checked}
+                  >
+                    <span className={cn(
+                      "flex items-center justify-center w-4 h-4 rounded border flex-shrink-0 transition-colors",
+                      checked ? "bg-primary border-primary text-primary-foreground" : "border-border"
+                    )}>
+                      {checked && <Check className="w-3 h-3" />}
+                    </span>
+                    <Folder className={cn("w-4 h-4 flex-shrink-0", mb.role ? "text-primary" : "text-muted-foreground")} />
+                    <span className="text-sm text-foreground truncate">{mb.name}</span>
+                  </button>
+                );
+              })}
+            </div>
+          )}
+        </div>
+      )}
+
       <SettingItem label={t('pro_interface.label')} description={t('pro_interface.description')}>
         <ToggleSwitch
           checked={proInterface}

lib/admin/types.ts

@@ -59,6 +59,7 @@ export interface FeatureGates {
   hoverActionsConfigEnabled: boolean;
   filesEnabled: boolean;
   contactsEnabled: boolean;
+  allMailViewEnabled: boolean;
 }
 
 export const DEFAULT_FEATURE_GATES: FeatureGates = {
@@ -79,6 +80,7 @@ export const DEFAULT_FEATURE_GATES: FeatureGates = {
   hoverActionsConfigEnabled: true,
   filesEnabled: true,
   contactsEnabled: true,
+  allMailViewEnabled: false,
 };
 
 export interface ThemePolicy {

lib/jmap/types.ts

@@ -871,3 +871,11 @@ export const UNIFIED_ROLE_BY_ID: Record<string, UnifiedMailboxRole> = Object.fro
 export function isUnifiedMailboxId(id: string): boolean {
   return id in UNIFIED_ROLE_BY_ID;
 }
+
+/**
+ * Virtual mailbox id for the gated "All Mail" view: every folder of a single
+ * account merged into one date-sorted list. Distinct from the unified mailbox
+ * ids above, which merge one role across multiple accounts. Which folders are
+ * included is a per-user setting (see `allMailFolderIds`).
+ */
+export const ALL_MAIL_MAILBOX_ID = '__all_mail__';

locales/cs/common.json

@@ -914,6 +914,13 @@
           "description": "Zahrnout do sjednoceného zobrazení také sdílené/skupinové schránky."
         }
       },
+      "all_mail": {
+        "label": "All Mail",
+        "description": "Show an \"All Mail\" entry above your folders that merges messages from across this account's folders into one list.",
+        "folders_label": "Folders in All Mail",
+        "folders_description": "Choose which folders are merged into the All Mail view.",
+        "no_folders": "No folders available."
+      },
       "colorful_sidebar_icons": {
         "label": "Barevné ikony postranního panelu",
         "description": "Obarví ikony složek a štítků podle typu (modré Doručené, červený Spam, zelené Odeslané atd.). Vypněte pro jednobarevný postranní panel."

locales/da/common.json

@@ -917,6 +917,13 @@
           "description": "Inkluder også delte/gruppepostkasser i den samlede visning."
         }
       },
+      "all_mail": {
+        "label": "All Mail",
+        "description": "Show an \"All Mail\" entry above your folders that merges messages from across this account's folders into one list.",
+        "folders_label": "Folders in All Mail",
+        "folders_description": "Choose which folders are merged into the All Mail view.",
+        "no_folders": "No folders available."
+      },
       "colorful_sidebar_icons": {
         "label": "Farverige sidepane-ikoner",
         "description": "Farvelæg mappe- og tag-ikoner efter type (blå indbakke, rød spam, grøn sendt osv.). Deaktivér for et monokromt sidepanel."

locales/de/common.json

@@ -914,6 +914,13 @@
           "description": "Gemeinsam genutzte/Gruppenpostfächer ebenfalls in die vereinheitlichte Ansicht aufnehmen."
         }
       },
+      "all_mail": {
+        "label": "All Mail",
+        "description": "Show an \"All Mail\" entry above your folders that merges messages from across this account's folders into one list.",
+        "folders_label": "Folders in All Mail",
+        "folders_description": "Choose which folders are merged into the All Mail view.",
+        "no_folders": "No folders available."
+      },
       "colorful_sidebar_icons": {
         "label": "Farbige Seitenleistensymbole",
         "description": "Ordner- und Tag-Symbole nach Typ einfärben (blauer Posteingang, roter Spam, grüner Gesendet usw.). Für eine monochrome Seitenleiste deaktivieren."

locales/en/common.json

@@ -917,6 +917,13 @@
           "description": "Also merge shared/group inboxes into the unified view."
         }
       },
+      "all_mail": {
+        "label": "All Mail",
+        "description": "Show an \"All Mail\" entry above your folders that merges messages from across this account's folders into one list.",
+        "folders_label": "Folders in All Mail",
+        "folders_description": "Choose which folders are merged into the All Mail view.",
+        "no_folders": "No folders available."
+      },
       "colorful_sidebar_icons": {
         "label": "Colorful Sidebar Icons",
         "description": "Tint folder and tag icons by type (blue Inbox, red Junk, green Sent, etc.). Disable for a monochrome sidebar."

locales/es/common.json

@@ -914,6 +914,13 @@
           "description": "Incluir también los buzones compartidos o de grupo en la vista unificada."
         }
       },
+      "all_mail": {
+        "label": "All Mail",
+        "description": "Show an \"All Mail\" entry above your folders that merges messages from across this account's folders into one list.",
+        "folders_label": "Folders in All Mail",
+        "folders_description": "Choose which folders are merged into the All Mail view.",
+        "no_folders": "No folders available."
+      },
       "colorful_sidebar_icons": {
         "label": "Iconos de barra lateral a color",
         "description": "Colorea los iconos de carpetas y etiquetas según su tipo (azul para Bandeja de entrada, rojo para Spam, verde para Enviados, etc.). Desactívalo para una barra lateral monocroma."

locales/fr/common.json

@@ -914,6 +914,13 @@
           "description": "Inclure également les boîtes partagées ou de groupe dans la vue unifiée."
         }
       },
+      "all_mail": {
+        "label": "All Mail",
+        "description": "Show an \"All Mail\" entry above your folders that merges messages from across this account's folders into one list.",
+        "folders_label": "Folders in All Mail",
+        "folders_description": "Choose which folders are merged into the All Mail view.",
+        "no_folders": "No folders available."
+      },
       "colorful_sidebar_icons": {
         "label": "Icônes colorées dans la barre latérale",
         "description": "Colore les icônes de dossiers et d'étiquettes par type (Boîte de réception en bleu, Indésirable en rouge, Envoyés en vert, etc.). Désactivez pour une barre latérale monochrome."

locales/hu/common.json

@@ -917,6 +917,13 @@
           "description": "Megosztott/csoportos postafiókok egyesítése az egységes nézetbe."
         }
       },
+      "all_mail": {
+        "label": "All Mail",
+        "description": "Show an \"All Mail\" entry above your folders that merges messages from across this account's folders into one list.",
+        "folders_label": "Folders in All Mail",
+        "folders_description": "Choose which folders are merged into the All Mail view.",
+        "no_folders": "No folders available."
+      },
       "colorful_sidebar_icons": {
         "label": "Színes oldalsáv ikonok",
         "description": "Mappa és címke ikonok színezése típus szerint (kék Beérkező, piros Spam, zöld Elküldött, stb.). Kapcsold ki az egyszínű oldalsávhoz."

locales/it/common.json

@@ -914,6 +914,13 @@
           "description": "Includi anche le caselle condivise o di gruppo nella vista unificata."
         }
       },
+      "all_mail": {
+        "label": "All Mail",
+        "description": "Show an \"All Mail\" entry above your folders that merges messages from across this account's folders into one list.",
+        "folders_label": "Folders in All Mail",
+        "folders_description": "Choose which folders are merged into the All Mail view.",
+        "no_folders": "No folders available."
+      },
       "colorful_sidebar_icons": {
         "label": "Icone colorate nella barra laterale",
         "description": "Colora le icone di cartelle ed etichette per tipo (Posta in arrivo blu, Spam rosso, Inviati verde, ecc.). Disattiva per una barra laterale monocromatica."

locales/ja/common.json

@@ -914,6 +914,13 @@
           "description": "共有/グループ受信トレイも統合ビューに含めます。"
         }
       },
+      "all_mail": {
+        "label": "All Mail",
+        "description": "Show an \"All Mail\" entry above your folders that merges messages from across this account's folders into one list.",
+        "folders_label": "Folders in All Mail",
+        "folders_description": "Choose which folders are merged into the All Mail view.",
+        "no_folders": "No folders available."
+      },
       "colorful_sidebar_icons": {
         "label": "カラフルなサイドバーアイコン",
         "description": "フォルダーとタグのアイコンを種類別に色分けします（受信トレイは青、迷惑メールは赤、送信済みは緑など）。モノクロのサイドバーにするには無効にしてください。"

locales/ko/common.json

@@ -914,6 +914,13 @@
           "description": "공유/그룹 받은편지함도 통합 보기에 포함합니다."
         }
       },
+      "all_mail": {
+        "label": "All Mail",
+        "description": "Show an \"All Mail\" entry above your folders that merges messages from across this account's folders into one list.",
+        "folders_label": "Folders in All Mail",
+        "folders_description": "Choose which folders are merged into the All Mail view.",
+        "no_folders": "No folders available."
+      },
       "colorful_sidebar_icons": {
         "label": "컬러풀한 사이드바 아이콘",
         "description": "폴더와 태그 아이콘을 유형별로 색상 표시합니다(받은편지함 파란색, 스팸 빨간색, 보낸편지함 녹색 등). 모노크롬 사이드바를 원하면 비활성화하세요."

locales/lv/common.json

@@ -914,6 +914,13 @@
           "description": "Iekļaut apvienotajā skatā arī koplietotās/grupas pastkastes."
         }
       },
+      "all_mail": {
+        "label": "All Mail",
+        "description": "Show an \"All Mail\" entry above your folders that merges messages from across this account's folders into one list.",
+        "folders_label": "Folders in All Mail",
+        "folders_description": "Choose which folders are merged into the All Mail view.",
+        "no_folders": "No folders available."
+      },
       "colorful_sidebar_icons": {
         "label": "Krāsainas sānjoslas ikonas",
         "description": "Iekrāsojiet mapju un birku ikonas pēc to veida (zila Iesūtne, sarkana Mēstules, zaļa Nosūtītie utt.). Atspējojiet, lai iegūtu vienkrāsainu sānjoslu."

locales/nl/common.json

@@ -914,6 +914,13 @@
           "description": "Gedeelde/groepspostvakken ook in de gecombineerde weergave opnemen."
         }
       },
+      "all_mail": {
+        "label": "All Mail",
+        "description": "Show an \"All Mail\" entry above your folders that merges messages from across this account's folders into one list.",
+        "folders_label": "Folders in All Mail",
+        "folders_description": "Choose which folders are merged into the All Mail view.",
+        "no_folders": "No folders available."
+      },
       "colorful_sidebar_icons": {
         "label": "Gekleurde zijbalkpictogrammen",
         "description": "Kleur map- en tagpictogrammen op type (blauw Postvak IN, rood Spam, groen Verzonden, enz.). Schakel uit voor een monochrome zijbalk."

locales/pl/common.json

@@ -914,6 +914,13 @@
           "description": "Dodaj również udostępnione/grupowe skrzynki do widoku wspólnego."
         }
       },
+      "all_mail": {
+        "label": "All Mail",
+        "description": "Show an \"All Mail\" entry above your folders that merges messages from across this account's folders into one list.",
+        "folders_label": "Folders in All Mail",
+        "folders_description": "Choose which folders are merged into the All Mail view.",
+        "no_folders": "No folders available."
+      },
       "colorful_sidebar_icons": {
         "label": "Kolorowe ikony paska bocznego",
         "description": "Koloruj ikony folderów i tagów według typu (niebieska Skrzynka odbiorcza, czerwona Spam, zielona Wysłane itp.). Wyłącz, aby uzyskać monochromatyczny pasek boczny."

locales/pt/common.json

@@ -914,6 +914,13 @@
           "description": "Incluir também as caixas partilhadas ou de grupo na vista unificada."
         }
       },
+      "all_mail": {
+        "label": "All Mail",
+        "description": "Show an \"All Mail\" entry above your folders that merges messages from across this account's folders into one list.",
+        "folders_label": "Folders in All Mail",
+        "folders_description": "Choose which folders are merged into the All Mail view.",
+        "no_folders": "No folders available."
+      },
       "colorful_sidebar_icons": {
         "label": "Ícones coloridos na barra lateral",
         "description": "Colorir ícones de pastas e etiquetas por tipo (Caixa de entrada azul, Spam vermelho, Enviados verde, etc.). Desative para uma barra lateral monocromática."

locales/ru/common.json

@@ -914,6 +914,13 @@
           "description": "Также объединять общие/групповые ящики в едином представлении."
         }
       },
+      "all_mail": {
+        "label": "All Mail",
+        "description": "Show an \"All Mail\" entry above your folders that merges messages from across this account's folders into one list.",
+        "folders_label": "Folders in All Mail",
+        "folders_description": "Choose which folders are merged into the All Mail view.",
+        "no_folders": "No folders available."
+      },
       "colorful_sidebar_icons": {
         "label": "Цветные значки боковой панели",
         "description": "Окрашивать значки папок и тегов по типу (синий «Входящие», красный «Спам», зелёный «Отправленные» и т. д.). Отключите для монохромной боковой панели."

locales/tr/common.json

@@ -914,6 +914,13 @@
           "description": "Paylaşılan/grup gelen kutularını da birleşik görünüme dahil et."
         }
       },
+      "all_mail": {
+        "label": "All Mail",
+        "description": "Show an \"All Mail\" entry above your folders that merges messages from across this account's folders into one list.",
+        "folders_label": "Folders in All Mail",
+        "folders_description": "Choose which folders are merged into the All Mail view.",
+        "no_folders": "No folders available."
+      },
       "colorful_sidebar_icons": {
         "label": "Renkli Kenar Çubuğu Simgeleri",
         "description": "Klasör ve etiket simgelerini türe göre renklendir (mavi Gelen Kutusu, kırmızı İstem Dışı vb.). Tek renkli kenar çubuğu için kapatın."

locales/uk/common.json

@@ -914,6 +914,13 @@
           "description": "Також об'єднувати спільні/групові скриньки у спільному перегляді."
         }
       },
+      "all_mail": {
+        "label": "All Mail",
+        "description": "Show an \"All Mail\" entry above your folders that merges messages from across this account's folders into one list.",
+        "folders_label": "Folders in All Mail",
+        "folders_description": "Choose which folders are merged into the All Mail view.",
+        "no_folders": "No folders available."
+      },
       "colorful_sidebar_icons": {
         "label": "Кольорові значки бічної панелі",
         "description": "Забарвлюйте значки папок і тегів за типом (синя «Вхідні», червоний «Спам», зелена «Надіслані» тощо). Вимкніть для монохромної бічної панелі."

locales/zh/common.json

@@ -914,6 +914,13 @@
           "description": "在统一视图中也合并共享/群组收件箱。"
         }
       },
+      "all_mail": {
+        "label": "All Mail",
+        "description": "Show an \"All Mail\" entry above your folders that merges messages from across this account's folders into one list.",
+        "folders_label": "Folders in All Mail",
+        "folders_description": "Choose which folders are merged into the All Mail view.",
+        "no_folders": "No folders available."
+      },
       "colorful_sidebar_icons": {
         "label": "彩色侧边栏图标",
         "description": "按类型为文件夹和标签图标着色（蓝色收件箱、红色垃圾邮件、绿色已发送等）。禁用以获得单色侧边栏。"

stores/email-store.ts

@@ -1,5 +1,5 @@
 import { create } from "zustand";
-import { Email, Mailbox, StateChange, ScheduledEmail, SendEmailResult } from "@/lib/jmap/types";
+import { Email, Mailbox, StateChange, ScheduledEmail, SendEmailResult, ALL_MAIL_MAILBOX_ID } from "@/lib/jmap/types";
 import type { UnifiedMailboxRole } from "@/lib/jmap/types";
 import type { IJMAPClient } from "@/lib/jmap/client-interface";
 import { useSettingsStore } from "@/stores/settings-store";
@@ -315,6 +315,33 @@ function resolveActionMailboxes(): Mailbox[] {
   return state.mailboxes;
 }
 
+/**
+ * Resolves the JMAP mailbox ids that make up the gated "All Mail" view for the
+ * active/viewing account. Honors the per-user `allMailFolderIds` setting; when
+ * unset (null) it defaults to every non-special (no-role) folder. Shared
+ * folders are excluded - All Mail is scoped to a single account. Returns
+ * JMAP-side ids (originalId for namespaced mailboxes).
+ */
+function resolveAllMailJmapIds(): string[] {
+  const mailboxes = resolveActionMailboxes().filter((mb) => !mb.isShared);
+  const configured = useSettingsStore.getState().allMailFolderIds;
+  const selected = configured === null
+    ? mailboxes.filter((mb) => !mb.role)
+    : mailboxes.filter((mb) => configured.includes(mb.id));
+  return selected.map((mb) => mb.originalId || mb.id);
+}
+
+/**
+ * Builds the JMAP Email/query filter for the All Mail view from a set of
+ * mailbox ids - an OR of `inMailbox` conditions (or a single condition).
+ */
+function buildAllMailFilter(jmapMailboxIds: string[]): Record<string, unknown> {
+  if (jmapMailboxIds.length === 1) {
+    return { inMailbox: jmapMailboxIds[0] };
+  }
+  return { operator: 'OR', conditions: jmapMailboxIds.map((id) => ({ inMailbox: id })) };
+}
+
 /**
  * Resolves the JMAP client, mailbox list, and JMAP accountId to use for a
  * single-email action.
@@ -658,6 +685,7 @@ export const useEmailStore = create<EmailStore>((set, get) => ({
       // doesn't exist in the fetched list (e.g. after an account switch)
       const currentSelectedMailbox = get().selectedMailbox;
       const selectionValid = currentSelectedMailbox === VIRTUAL_SCHEDULED_MAILBOX_ID
+        || currentSelectedMailbox === ALL_MAIL_MAILBOX_ID
         || (currentSelectedMailbox && mailboxes.some(m => m.id === currentSelectedMailbox));
       const loadingPatch = isInitialLoad ? { isLoading: false } : {};
       if (!selectionValid) {
@@ -715,6 +743,24 @@ export const useEmailStore = create<EmailStore>((set, get) => ({
         await get().fetchScheduledEmails(client);
         return;
       }
+      if (targetMailboxId === ALL_MAIL_MAILBOX_ID) {
+        const jmapIds = resolveAllMailJmapIds();
+        if (jmapIds.length === 0) {
+          set({ emails: [], hasMoreEmails: false, totalEmails: 0, isLoading: false });
+          return;
+        }
+        const emailsPerPage = useSettingsStore.getState().emailsPerPage;
+        const result = await resolveActionClient(client).advancedSearchEmails(
+          buildAllMailFilter(jmapIds), undefined, emailsPerPage, 0,
+        );
+        set({
+          emails: annotateScheduledEmails(result.emails, get().scheduledSubmissionByEmailId),
+          hasMoreEmails: result.hasMore,
+          totalEmails: result.total,
+          isLoading: false,
+        });
+        return;
+      }
       const effectiveClient = resolveActionClient(client);
 
       // Find the mailbox to get its accountId (for shared folder support)
@@ -822,7 +868,21 @@ export const useEmailStore = create<EmailStore>((set, get) => ({
       const { searchFilters } = get();
       const hasFilters = !isFilterEmpty(searchFilters);
 
-      if (searchQuery || hasFilters) {
+      if (selectedMailbox === ALL_MAIL_MAILBOX_ID) {
+        if (searchQuery || hasFilters) {
+          // Search within All Mail spans the whole account (no inMailbox).
+          result = hasFilters
+            ? await effectiveClient.advancedSearchEmails(buildJMAPFilter(searchQuery, searchFilters, undefined), undefined, emailsPerPage, position)
+            : await effectiveClient.searchEmails(searchQuery, undefined, undefined, emailsPerPage, position);
+        } else {
+          const jmapIds = resolveAllMailJmapIds();
+          if (jmapIds.length === 0) {
+            set({ hasMoreEmails: false, isLoadingMore: false });
+            return;
+          }
+          result = await effectiveClient.advancedSearchEmails(buildAllMailFilter(jmapIds), undefined, emailsPerPage, position);
+        }
+      } else if (searchQuery || hasFilters) {
         const mailboxes = resolveActionMailboxes();
         const mailbox = mailboxes.find(mb => mb.id === selectedMailbox);
         const jmapMailboxId = mailbox?.originalId || selectedMailbox;
@@ -1484,14 +1544,16 @@ export const useEmailStore = create<EmailStore>((set, get) => ({
         return;
       }
 
-      // Get the current mailbox to scope the search
+      // Get the current mailbox to scope the search. In the All Mail view the
+      // search spans every folder of the account (no inMailbox constraint).
       const selectedMailbox = get().selectedMailbox;
+      const isAllMail = selectedMailbox === ALL_MAIL_MAILBOX_ID;
       const mailboxes = resolveActionMailboxes();
       const mailbox = mailboxes.find(mb => mb.id === selectedMailbox);
       // Use originalId for shared mailboxes
-      const jmapMailboxId = mailbox?.originalId || selectedMailbox;
+      const jmapMailboxId = isAllMail ? undefined : (mailbox?.originalId || selectedMailbox);
       // Only pass accountId for shared mailboxes, not for primary account
-      const accountId = mailbox?.isShared ? mailbox.accountId : undefined;
+      const accountId = isAllMail ? undefined : (mailbox?.isShared ? mailbox.accountId : undefined);
 
       const result = await resolveActionClient(client).searchEmails(query, jmapMailboxId, accountId, emailsPerPage, 0);
       const externals = await emailHooks.onProvideSearchResults.transform([] as ExternalSearchResult[], { query, filters: get().searchFilters });
@@ -1559,9 +1621,10 @@ export const useEmailStore = create<EmailStore>((set, get) => ({
         return;
       }
 
+      const isAllMail = selectedMailbox === ALL_MAIL_MAILBOX_ID;
       const mailbox = mailboxes.find(mb => mb.id === selectedMailbox);
-      const jmapMailboxId = mailbox?.originalId || selectedMailbox;
+      const jmapMailboxId = isAllMail ? undefined : (mailbox?.originalId || selectedMailbox);
-      const accountId = mailbox?.isShared ? mailbox.accountId : undefined;
+      const accountId = isAllMail ? undefined : (mailbox?.isShared ? mailbox.accountId : undefined);
 
       const filter = buildJMAPFilter(searchQuery, searchFilters, jmapMailboxId);
       const result = await resolveActionClient(client).advancedSearchEmails(filter, accountId, emailsPerPage, 0);

stores/settings-store.ts

@@ -215,6 +215,13 @@ interface SettingsState {
   enableUnifiedMailbox: boolean;
   includeGroupInUnified: boolean;
 
+  // All Mail view (gated): user toggle (like the unified mailbox) plus the set
+  // of folder ids merged into the virtual "All Mail" mailbox. `null` = never
+  // configured, in which case the view defaults to all non-special (no-role)
+  // folders of the active account.
+  enableAllMailView: boolean;
+  allMailFolderIds: string[] | null;
+
   // Email Display
   disableThreading: boolean; // Show emails as individual messages instead of grouped by conversation
 
@@ -398,6 +405,10 @@ const DEFAULT_SETTINGS = {
   enableUnifiedMailbox: false,
   includeGroupInUnified: false,
 
+  // All Mail view (gated)
+  enableAllMailView: false,
+  allMailFolderIds: null as string[] | null,
+
   // Email Display
   disableThreading: false,
 
@@ -570,6 +581,8 @@ export const useSettingsStore = create<SettingsState>()(
           // (see DEVICE_LOCAL_SETTING_KEYS) and must not be synced.
           enableUnifiedMailbox: state.enableUnifiedMailbox,
           includeGroupInUnified: state.includeGroupInUnified,
+          enableAllMailView: state.enableAllMailView,
+          allMailFolderIds: state.allMailFolderIds,
           senderFavicons: state.senderFavicons,
           showAvatarsInJunk: state.showAvatarsInJunk,
           colorfulSidebarIcons: state.colorfulSidebarIcons,