diff --git a/sidepanel/editable-list-picker.js b/sidepanel/editable-list-picker.js
new file mode 100644
index 0000000..fcbf61f
--- /dev/null
+++ b/sidepanel/editable-list-picker.js
@@ -0,0 +1,228 @@
+(function attachSidepanelEditableListPicker(globalScope) {
+  const editableListPickers = [];
+
+  function splitEditableListValues(value = '') {
+    return String(value || '')
+      .split(/[\r\n,，、]+/)
+      .map((name) => name.trim())
+      .filter(Boolean);
+  }
+
+  function normalizeEditableListValues(...sources) {
+    const values = [];
+    const seen = new Set();
+
+    const append = (value) => {
+      if (Array.isArray(value)) {
+        value.forEach(append);
+        return;
+      }
+      for (const item of splitEditableListValues(value)) {
+        const key = item.toLowerCase();
+        if (!key || seen.has(key)) {
+          continue;
+        }
+        seen.add(key);
+        values.push(item);
+      }
+    };
+
+    sources.forEach(append);
+    return values;
+  }
+
+  function createEditableListPicker(config = {}) {
+    const {
+      root,
+      input,
+      trigger,
+      current,
+      menu,
+      emptyLabel = '请先添加',
+      fallbackItems = [],
+      minItems = 0,
+      deleteLabel = '删除',
+      itemLabel = '项目',
+      normalizeItems = normalizeEditableListValues,
+      normalizeValue = (value) => String(value || '').trim(),
+      getItemValue = (item) => String(item || '').trim(),
+      getItemLabel = (item) => getItemValue(item),
+      getItemDeleteLabel = (item) => getItemLabel(item),
+      onDelete = null,
+      onDeleteError = null,
+    } = config;
+
+    const picker = {
+      root,
+      input,
+      trigger,
+      current,
+      menu,
+      items: [],
+      open: false,
+    };
+
+    const getFallbackItems = () => normalizeItems(fallbackItems);
+    const getNormalizedItemValue = (item) => normalizeValue(getItemValue(item));
+    const findItemByValue = (value) => {
+      const normalized = normalizeValue(value);
+      return picker.items.find((item) => getNormalizedItemValue(item) === normalized) || null;
+    };
+    const reportDeleteError = (error) => {
+      const fallbackMessage = `${deleteLabel}${itemLabel}失败。`;
+      if (typeof onDeleteError === 'function') {
+        onDeleteError(error, fallbackMessage);
+        return;
+      }
+      if (typeof globalScope.showToast === 'function') {
+        globalScope.showToast(error?.message || fallbackMessage, 'error');
+      }
+    };
+
+    picker.setOpen = (open) => {
+      picker.open = Boolean(open) && !trigger?.disabled;
+      if (menu) {
+        menu.hidden = !picker.open;
+      }
+      if (trigger) {
+        trigger.setAttribute('aria-expanded', picker.open ? 'true' : 'false');
+        trigger.classList?.toggle('is-open', picker.open);
+      }
+    };
+
+    picker.close = () => {
+      picker.setOpen(false);
+    };
+
+    picker.setVisible = (visible) => {
+      if (root) {
+        root.style.display = visible ? '' : 'none';
+      }
+      if (!visible) {
+        picker.close();
+      }
+    };
+
+    picker.setSelection = (value, options = {}) => {
+      const fallback = getNormalizedItemValue(picker.items[0]) || getNormalizedItemValue(getFallbackItems()[0]) || '';
+      const selected = normalizeValue(value) || fallback;
+      const selectedItem = findItemByValue(selected);
+      if (input) {
+        input.value = selected;
+        if (options.emit && typeof input.dispatchEvent === 'function') {
+          input.dispatchEvent(new Event('change', { bubbles: true }));
+        }
+      }
+      if (current) {
+        current.textContent = selectedItem ? getItemLabel(selectedItem) : (selected || emptyLabel);
+      }
+    };
+
+    picker.render = (items = [], selectedValue = '') => {
+      const normalizedItems = normalizeItems(items);
+      picker.items = normalizedItems.length ? normalizedItems : getFallbackItems();
+      const inputValue = normalizeValue(input?.value);
+      const selected = normalizeValue(selectedValue)
+        || (findItemByValue(inputValue) ? inputValue : '')
+        || getNormalizedItemValue(picker.items[0])
+        || '';
+
+      if (trigger) {
+        trigger.disabled = picker.items.length === 0;
+      }
+      if (picker.items.length === 0) {
+        if (menu) {
+          menu.innerHTML = '';
+        }
+        picker.setSelection('', { emit: false });
+        picker.close();
+        return;
+      }
+
+      if (
+        !menu
+        || typeof menu.appendChild !== 'function'
+        || typeof globalScope.document === 'undefined'
+        || typeof globalScope.document.createElement !== 'function'
+      ) {
+        picker.setSelection(selected, { emit: false });
+        return;
+      }
+
+      menu.innerHTML = '';
+      picker.items.forEach((item) => {
+        const itemValue = getNormalizedItemValue(item);
+        const row = globalScope.document.createElement('div');
+        row.className = 'editable-list-option-row';
+
+        const option = globalScope.document.createElement('button');
+        option.type = 'button';
+        option.className = 'editable-list-option';
+        option.setAttribute('role', 'option');
+        option.setAttribute('aria-selected', itemValue === selected ? 'true' : 'false');
+        option.textContent = getItemLabel(item);
+        option.addEventListener('click', () => {
+          picker.setSelection(itemValue, { emit: true });
+          picker.close();
+        });
+
+        const deleteButton = globalScope.document.createElement('button');
+        deleteButton.type = 'button';
+        deleteButton.className = 'editable-list-delete';
+        deleteButton.textContent = deleteLabel;
+        deleteButton.title = `${deleteLabel}${itemLabel} ${getItemDeleteLabel(item)}`;
+        deleteButton.setAttribute('aria-label', `${deleteLabel}${itemLabel} ${getItemDeleteLabel(item)}`);
+        deleteButton.disabled = picker.items.length <= minItems;
+        deleteButton.addEventListener('click', (event) => {
+          event.preventDefault();
+          event.stopPropagation();
+          if (typeof onDelete === 'function') {
+            Promise.resolve(onDelete(itemValue, item)).catch(reportDeleteError);
+          }
+        });
+
+        row.appendChild(option);
+        row.appendChild(deleteButton);
+        menu.appendChild(row);
+      });
+      picker.setSelection(selected, { emit: false });
+    };
+
+    trigger?.addEventListener('click', (event) => {
+      event.stopPropagation();
+      editableListPickers.forEach((item) => {
+        if (item !== picker) {
+          item.close();
+        }
+      });
+      picker.setOpen(!picker.open);
+    });
+    trigger?.addEventListener('keydown', (event) => {
+      if (event.key === 'Escape') {
+        picker.close();
+      }
+    });
+    menu?.addEventListener('click', (event) => {
+      event.stopPropagation();
+    });
+
+    editableListPickers.push(picker);
+    return picker;
+  }
+
+  function closeEditableListPickers() {
+    editableListPickers.forEach((picker) => picker.close());
+  }
+
+  function isClickInsideEditableListPicker(target) {
+    return editableListPickers.some((picker) => Boolean(picker.root?.contains(target)));
+  }
+
+  globalScope.SidepanelEditableListPicker = {
+    closeEditableListPickers,
+    createEditableListPicker,
+    isClickInsideEditableListPicker,
+    normalizeEditableListValues,
+    splitEditableListValues,
+  };
+})(window);
diff --git a/sidepanel/paypal-manager.js b/sidepanel/paypal-manager.js
index 97c1be0..f4de541 100644
--- a/sidepanel/paypal-manager.js
+++ b/sidepanel/paypal-manager.js
@@ -9,6 +9,7 @@
     } = context;
 
     let actionInFlight = false;
+    let payPalAccountPicker = null;
 
     function getPayPalAccounts(currentState = state.getLatestState()) {
       return helpers.getPayPalAccounts(currentState);
@@ -27,6 +28,58 @@
       )).join('');
     }
 
+    function getPayPalAccountValue(account = {}) {
+      return String(account?.id || '').trim();
+    }
+
+    function getPayPalAccountLabel(account = {}) {
+      return String(account?.email || '(未命名账号)');
+    }
+
+    function normalizePickerPayPalAccounts(accounts = []) {
+      return Array.isArray(accounts)
+        ? accounts.filter((account) => getPayPalAccountValue(account))
+        : [];
+    }
+
+    function getPayPalAccountPicker() {
+      if (payPalAccountPicker) {
+        return payPalAccountPicker;
+      }
+
+      const pickerModule = helpers.editableListPicker || globalScope.SidepanelEditableListPicker;
+      const createEditableListPicker = pickerModule?.createEditableListPicker;
+      if (
+        typeof createEditableListPicker !== 'function'
+        || !dom.payPalAccountPickerRoot
+        || !dom.btnPayPalAccountMenu
+        || !dom.payPalAccountCurrent
+        || !dom.payPalAccountMenu
+      ) {
+        return null;
+      }
+
+      payPalAccountPicker = createEditableListPicker({
+        root: dom.payPalAccountPickerRoot,
+        input: dom.selectPayPalAccount,
+        trigger: dom.btnPayPalAccountMenu,
+        current: dom.payPalAccountCurrent,
+        menu: dom.payPalAccountMenu,
+        emptyLabel: '请先添加 PayPal 账号',
+        itemLabel: '账号',
+        normalizeItems: normalizePickerPayPalAccounts,
+        normalizeValue: (value) => String(value || '').trim(),
+        getItemValue: getPayPalAccountValue,
+        getItemLabel: getPayPalAccountLabel,
+        getItemDeleteLabel: getPayPalAccountLabel,
+        onDelete: (accountId) => handleDeletePayPalAccount(accountId),
+        onDeleteError: (error, fallbackMessage) => {
+          helpers.showToast(error?.message || fallbackMessage, 'error');
+        },
+      });
+      return payPalAccountPicker;
+    }
+
     function applyPayPalAccountMutation(account) {
       if (!account?.id) return;
       const latestState = state.getLatestState();
@@ -43,10 +96,17 @@
       const latestState = state.getLatestState();
       const accounts = getPayPalAccounts(latestState);
       const currentId = getCurrentPayPalAccountId(latestState);
+      const selectedId = accounts.some((account) => account.id === currentId) ? currentId : '';
+      const picker = getPayPalAccountPicker();
+
+      if (picker) {
+        picker.render(accounts, selectedId);
+        return;
+      }
 
       dom.selectPayPalAccount.innerHTML = buildSelectOptions(accounts);
       dom.selectPayPalAccount.disabled = accounts.length === 0;
-      dom.selectPayPalAccount.value = accounts.some((account) => account.id === currentId) ? currentId : '';
+      dom.selectPayPalAccount.value = selectedId;
     }
 
     async function syncSelectedPayPalAccount(options = {}) {
@@ -83,6 +143,62 @@
       return response.account || null;
     }
 
+    async function handleDeletePayPalAccount(accountId) {
+      if (actionInFlight) return;
+
+      const targetId = String(accountId || '').trim();
+      if (!targetId) {
+        return;
+      }
+
+      const latestState = state.getLatestState();
+      const accounts = getPayPalAccounts(latestState);
+      const targetAccount = accounts.find((account) => account.id === targetId);
+      if (!targetAccount) {
+        return;
+      }
+
+      actionInFlight = true;
+      if (dom.btnAddPayPalAccount) {
+        dom.btnAddPayPalAccount.disabled = true;
+      }
+
+      try {
+        const nextAccounts = accounts.filter((account) => account.id !== targetId);
+        const currentId = getCurrentPayPalAccountId(latestState);
+        const nextCurrentAccount = currentId === targetId
+          ? (nextAccounts[0] || null)
+          : (nextAccounts.find((account) => account.id === currentId) || null);
+        const payload = {
+          paypalAccounts: nextAccounts,
+          currentPayPalAccountId: nextCurrentAccount?.id || '',
+          paypalEmail: String(nextCurrentAccount?.email || '').trim(),
+          paypalPassword: String(nextCurrentAccount?.password || ''),
+        };
+
+        const response = await runtime.sendMessage({
+          type: 'SAVE_SETTING',
+          source: 'sidepanel',
+          payload,
+        });
+        if (response?.error) {
+          throw new Error(response.error);
+        }
+
+        state.syncLatestState({
+          ...payload,
+          currentPayPalAccountId: payload.currentPayPalAccountId || null,
+        });
+        renderPayPalAccounts();
+        helpers.showToast(`已删除 PayPal 账号：${targetAccount.email || targetId}`, 'success', 1600);
+      } finally {
+        actionInFlight = false;
+        if (dom.btnAddPayPalAccount) {
+          dom.btnAddPayPalAccount.disabled = false;
+        }
+      }
+    }
+
     async function openPayPalAccountDialog() {
       if (typeof helpers.openFormDialog !== 'function') {
         throw new Error('表单弹窗能力未加载，请刷新扩展后重试。');
@@ -180,6 +296,7 @@
 
     return {
       bindPayPalEvents,
+      handleDeletePayPalAccount,
       renderPayPalAccounts,
       syncSelectedPayPalAccount,
     };
diff --git a/sidepanel/sidepanel.css b/sidepanel/sidepanel.css
index 45cb3c8..7473026 100644
--- a/sidepanel/sidepanel.css
+++ b/sidepanel/sidepanel.css
@@ -1971,13 +1971,13 @@ header {
 .data-select:focus { border-color: var(--blue); box-shadow: 0 0 0 3px var(--blue-soft); }
 [data-theme="dark"] .data-select { color-scheme: dark; }
 
-.sub2api-group-picker {
+.editable-list-picker {
   position: relative;
   flex: 1;
   min-width: 0;
 }
 
-.sub2api-group-trigger {
+.editable-list-trigger {
   width: 100%;
   display: flex;
   align-items: center;
@@ -1987,7 +1987,7 @@ header {
   text-align: left;
 }
 
-.sub2api-group-caret {
+.editable-list-caret {
   width: 8px;
   height: 8px;
   border-right: 1.5px solid currentColor;
@@ -1997,11 +1997,11 @@ header {
   opacity: 0.7;
 }
 
-.sub2api-group-trigger.is-open .sub2api-group-caret {
+.editable-list-trigger.is-open .editable-list-caret {
   transform: translateY(2px) rotate(225deg);
 }
 
-.sub2api-group-menu {
+.editable-list-menu {
   position: absolute;
   z-index: 70;
   top: calc(100% + 4px);
@@ -2016,15 +2016,15 @@ header {
   box-shadow: var(--shadow-md);
 }
 
-.sub2api-group-option-row {
+.editable-list-option-row {
   display: flex;
   align-items: center;
   gap: 4px;
   min-height: 30px;
 }
 
-.sub2api-group-option,
-.sub2api-group-delete {
+.editable-list-option,
+.editable-list-delete {
   border: none;
   border-radius: var(--radius-sm);
   background: transparent;
@@ -2033,7 +2033,7 @@ header {
   transition: background var(--transition), color var(--transition);
 }
 
-.sub2api-group-option {
+.editable-list-option {
   flex: 1;
   min-width: 0;
   padding: 6px 8px;
@@ -2045,24 +2045,24 @@ header {
   white-space: nowrap;
 }
 
-.sub2api-group-option[aria-selected="true"] {
+.editable-list-option[aria-selected="true"] {
   color: var(--blue);
   background: var(--blue-soft);
 }
 
-.sub2api-group-option:hover,
-.sub2api-group-delete:hover:not(:disabled) {
+.editable-list-option:hover,
+.editable-list-delete:hover:not(:disabled) {
   color: var(--text-primary);
   background: var(--bg-hover);
 }
 
-.sub2api-group-delete {
+.editable-list-delete {
   flex: 0 0 auto;
   padding: 5px 7px;
   font-size: 11px;
 }
 
-.sub2api-group-delete:disabled {
+.editable-list-delete:disabled {
   cursor: not-allowed;
   opacity: 0.42;
 }
diff --git a/sidepanel/sidepanel.html b/sidepanel/sidepanel.html
index b509b79..dd2ebb5 100644
--- a/sidepanel/sidepanel.html
+++ b/sidepanel/sidepanel.html
@@ -199,13 +199,13 @@
         <span class="data-label">分组</span>
         <div class="data-inline">
           <input type="hidden" id="input-sub2api-group" value="codex" />
-          <div id="sub2api-group-picker" class="sub2api-group-picker">
-            <button id="btn-sub2api-group-menu" class="data-select sub2api-group-trigger" type="button"
+          <div id="sub2api-group-picker" class="editable-list-picker">
+            <button id="btn-sub2api-group-menu" class="data-select editable-list-trigger" type="button"
               aria-haspopup="listbox" aria-expanded="false">
               <span id="sub2api-group-current" class="truncate">codex</span>
-              <span class="sub2api-group-caret" aria-hidden="true"></span>
+              <span class="editable-list-caret" aria-hidden="true"></span>
             </button>
-            <div id="sub2api-group-menu" class="sub2api-group-menu" role="listbox" hidden></div>
+            <div id="sub2api-group-menu" class="editable-list-menu" role="listbox" hidden></div>
           </div>
           <button id="btn-add-sub2api-group" class="btn btn-outline btn-sm data-inline-btn" type="button">添加</button>
         </div>
@@ -267,9 +267,15 @@
       <div class="data-row" id="row-paypal-account" style="display:none;">
         <span class="data-label">PayPal 账号</span>
         <div class="data-inline">
-          <select id="select-paypal-account" class="data-select">
-            <option value="">请先添加 PayPal 账号</option>
-          </select>
+          <input type="hidden" id="select-paypal-account" value="" />
+          <div id="paypal-account-picker" class="editable-list-picker">
+            <button id="btn-paypal-account-menu" class="data-select editable-list-trigger" type="button"
+              aria-haspopup="listbox" aria-expanded="false">
+              <span id="paypal-account-current" class="truncate">请先添加 PayPal 账号</span>
+              <span class="editable-list-caret" aria-hidden="true"></span>
+            </button>
+            <div id="paypal-account-menu" class="editable-list-menu" role="listbox" hidden></div>
+          </div>
           <button id="btn-add-paypal-account" class="btn btn-outline btn-sm data-inline-btn" type="button">添加</button>
         </div>
       </div>
@@ -459,7 +465,15 @@
       <div class="data-row" id="row-cf-domain" style="display:none;">
         <span class="data-label">CF 域名</span>
         <div class="data-inline">
-          <select id="select-cf-domain" class="data-select"></select>
+          <input type="hidden" id="select-cf-domain" value="" />
+          <div id="cf-domain-picker" class="editable-list-picker">
+            <button id="btn-cf-domain-menu" class="data-select editable-list-trigger" type="button"
+              aria-haspopup="listbox" aria-expanded="false">
+              <span id="cf-domain-current" class="truncate">请先添加域名</span>
+              <span class="editable-list-caret" aria-hidden="true"></span>
+            </button>
+            <div id="cf-domain-menu" class="editable-list-menu" role="listbox" hidden></div>
+          </div>
           <input type="text" id="input-cf-domain" class="data-input" placeholder="例如 yourdomain.xyz"
             style="display:none;" />
           <button id="btn-cf-domain-mode" class="btn btn-outline btn-sm data-inline-btn" type="button">添加</button>
@@ -633,7 +647,15 @@
       <div class="data-row" id="row-temp-email-domain" style="display:none;">
         <span class="data-label">Temp 域名</span>
         <div class="data-inline">
-          <select id="select-temp-email-domain" class="data-select"></select>
+          <input type="hidden" id="select-temp-email-domain" value="" />
+          <div id="temp-email-domain-picker" class="editable-list-picker">
+            <button id="btn-temp-email-domain-menu" class="data-select editable-list-trigger" type="button"
+              aria-haspopup="listbox" aria-expanded="false">
+              <span id="temp-email-domain-current" class="truncate">请先添加域名</span>
+              <span class="editable-list-caret" aria-hidden="true"></span>
+            </button>
+            <div id="temp-email-domain-menu" class="editable-list-menu" role="listbox" hidden></div>
+          </div>
           <input type="text" id="input-temp-email-domain" class="data-input" placeholder="例如 mail.example.com"
             style="display:none;" />
           <button id="btn-temp-email-domain-mode" class="btn btn-outline btn-sm" type="button">添加</button>
@@ -1595,6 +1617,7 @@
   <script src="contribution-content-update-service.js"></script>
   <script src="account-pool-ui.js"></script>
   <script src="form-dialog.js"></script>
+  <script src="editable-list-picker.js"></script>
   <script src="hotmail-manager.js"></script>
   <script src="mail-2925-manager.js"></script>
   <script src="paypal-manager.js"></script>
diff --git a/sidepanel/sidepanel.js b/sidepanel/sidepanel.js
index aff6b05..b298284 100644
--- a/sidepanel/sidepanel.js
+++ b/sidepanel/sidepanel.js
@@ -95,7 +95,7 @@ const rowSub2ApiPassword = document.getElementById('row-sub2api-password');
 const inputSub2ApiPassword = document.getElementById('input-sub2api-password');
 const rowSub2ApiGroup = document.getElementById('row-sub2api-group');
 const inputSub2ApiGroup = document.getElementById('input-sub2api-group');
-const sub2ApiGroupPicker = document.getElementById('sub2api-group-picker');
+const sub2ApiGroupPickerRoot = document.getElementById('sub2api-group-picker');
 const btnSub2ApiGroupMenu = document.getElementById('btn-sub2api-group-menu');
 const sub2ApiGroupCurrent = document.getElementById('sub2api-group-current');
 const sub2ApiGroupMenu = document.getElementById('sub2api-group-menu');
@@ -178,6 +178,10 @@ const btnGpcCardKeyPurchase = document.getElementById('btn-gpc-card-key-purchase
 const plusPaymentMethodCaption = document.getElementById('plus-payment-method-caption');
 const rowPayPalAccount = document.getElementById('row-paypal-account');
 const selectPayPalAccount = document.getElementById('select-paypal-account');
+const payPalAccountPickerRoot = document.getElementById('paypal-account-picker');
+const btnPayPalAccountMenu = document.getElementById('btn-paypal-account-menu');
+const payPalAccountCurrent = document.getElementById('paypal-account-current');
+const payPalAccountMenu = document.getElementById('paypal-account-menu');
 const btnAddPayPalAccount = document.getElementById('btn-add-paypal-account');
 const rowGpcHelperApi = document.getElementById('row-gpc-helper-api');
 const inputGpcHelperApi = document.getElementById('input-gpc-helper-api');
@@ -240,6 +244,10 @@ const rowTempEmailRandomSubdomainToggle = document.getElementById('row-temp-emai
 const inputTempEmailUseRandomSubdomain = document.getElementById('input-temp-email-use-random-subdomain');
 const rowTempEmailDomain = document.getElementById('row-temp-email-domain');
 const selectTempEmailDomain = document.getElementById('select-temp-email-domain');
+const tempEmailDomainPickerRoot = document.getElementById('temp-email-domain-picker');
+const btnTempEmailDomainMenu = document.getElementById('btn-temp-email-domain-menu');
+const tempEmailDomainCurrent = document.getElementById('temp-email-domain-current');
+const tempEmailDomainMenu = document.getElementById('temp-email-domain-menu');
 const inputTempEmailDomain = document.getElementById('input-temp-email-domain');
 const btnTempEmailDomainMode = document.getElementById('btn-temp-email-domain-mode');
 const cloudflareTempEmailSection = document.getElementById('cloudflare-temp-email-section');
@@ -339,6 +347,10 @@ const rowInbucketMailbox = document.getElementById('row-inbucket-mailbox');
 const inputInbucketMailbox = document.getElementById('input-inbucket-mailbox');
 const rowCfDomain = document.getElementById('row-cf-domain');
 const selectCfDomain = document.getElementById('select-cf-domain');
+const cfDomainPickerRoot = document.getElementById('cf-domain-picker');
+const btnCfDomainMenu = document.getElementById('btn-cf-domain-menu');
+const cfDomainCurrent = document.getElementById('cf-domain-current');
+const cfDomainMenu = document.getElementById('cf-domain-menu');
 const inputCfDomain = document.getElementById('input-cf-domain');
 const btnCfDomainMode = document.getElementById('btn-cf-domain-mode');
 const inputRunCount = document.getElementById('input-run-count');
@@ -1099,36 +1111,40 @@ let currentContributionContentSnapshot = null;
 let contributionContentSnapshotRequestInFlight = null;
 
 const DEFAULT_SUB2API_GROUP_OPTIONS = ['codex', 'openai-plus'];
-let sub2ApiGroupMenuOpen = false;
-
-function splitSub2ApiGroupNames(value = '') {
-  return String(value || '')
-    .split(/[\r\n,，、]+/)
-    .map((name) => name.trim())
-    .filter(Boolean);
-}
+const editableListPickerModule = window.SidepanelEditableListPicker || {};
+const normalizeEditableListValues = editableListPickerModule.normalizeEditableListValues
+  || ((...sources) => {
+    const values = [];
+    const seen = new Set();
+    const append = (value) => {
+      const items = Array.isArray(value)
+        ? value
+        : String(value || '').split(/[\r\n,，、]+/);
+      items.forEach((item) => {
+        const normalized = String(item || '').trim();
+        const key = normalized.toLowerCase();
+        if (key && !seen.has(key)) {
+          seen.add(key);
+          values.push(normalized);
+        }
+      });
+    };
+    sources.forEach(append);
+    return values;
+  });
+const createEditableListPicker = editableListPickerModule.createEditableListPicker
+  || (() => ({
+    close() { },
+    render() { },
+    setOpen() { },
+    setSelection() { },
+    setVisible() { },
+  }));
+const closeEditableListPickers = editableListPickerModule.closeEditableListPickers || (() => { });
+const isClickInsideEditableListPicker = editableListPickerModule.isClickInsideEditableListPicker || (() => false);
 
 function normalizeSub2ApiGroupOptions(...sources) {
-  const groups = [];
-  const seen = new Set();
-
-  const append = (value) => {
-    if (Array.isArray(value)) {
-      value.forEach(append);
-      return;
-    }
-    for (const name of splitSub2ApiGroupNames(value)) {
-      const key = name.toLowerCase();
-      if (!key || seen.has(key)) {
-        continue;
-      }
-      seen.add(key);
-      groups.push(name);
-    }
-  };
-
-  sources.forEach(append);
-  return groups;
+  return normalizeEditableListValues(...sources);
 }
 
 function getSelectedSub2ApiGroupName() {
@@ -1144,29 +1160,46 @@ function getSub2ApiGroupOptionsState(state = latestState) {
   return options.length ? options : [...DEFAULT_SUB2API_GROUP_OPTIONS];
 }
 
-function setSub2ApiGroupMenuOpen(open) {
-  sub2ApiGroupMenuOpen = Boolean(open);
-  if (sub2ApiGroupMenu) {
-    sub2ApiGroupMenu.hidden = !sub2ApiGroupMenuOpen;
-  }
-  if (btnSub2ApiGroupMenu) {
-    btnSub2ApiGroupMenu.setAttribute('aria-expanded', sub2ApiGroupMenuOpen ? 'true' : 'false');
-    btnSub2ApiGroupMenu.classList?.toggle('is-open', sub2ApiGroupMenuOpen);
-  }
-}
+const sub2ApiGroupPicker = createEditableListPicker({
+  root: sub2ApiGroupPickerRoot,
+  input: inputSub2ApiGroup,
+  trigger: btnSub2ApiGroupMenu,
+  current: sub2ApiGroupCurrent,
+  menu: sub2ApiGroupMenu,
+  fallbackItems: DEFAULT_SUB2API_GROUP_OPTIONS,
+  minItems: 1,
+  itemLabel: '分组',
+  onDelete: handleDeleteSub2ApiGroup,
+  onDeleteError: (error) => showToast(error?.message || '删除 SUB2API 分组失败。', 'error'),
+});
 
-function setSub2ApiGroupSelection(groupName, options = {}) {
-  const selected = String(groupName || '').trim() || DEFAULT_SUB2API_GROUP_OPTIONS[0];
-  if (inputSub2ApiGroup) {
-    inputSub2ApiGroup.value = selected;
-    if (options.emit && typeof inputSub2ApiGroup.dispatchEvent === 'function') {
-      inputSub2ApiGroup.dispatchEvent(new Event('change', { bubbles: true }));
-    }
-  }
-  if (sub2ApiGroupCurrent) {
-    sub2ApiGroupCurrent.textContent = selected;
-  }
-}
+const cfDomainPicker = createEditableListPicker({
+  root: cfDomainPickerRoot,
+  input: selectCfDomain,
+  trigger: btnCfDomainMenu,
+  current: cfDomainCurrent,
+  menu: cfDomainMenu,
+  emptyLabel: '请先添加域名',
+  itemLabel: '域名',
+  normalizeItems: normalizeCloudflareDomains,
+  normalizeValue: normalizeCloudflareDomainValue,
+  onDelete: handleDeleteCloudflareDomain,
+  onDeleteError: (error) => showToast(error?.message || '删除 Cloudflare 域名失败。', 'error'),
+});
+
+const tempEmailDomainPicker = createEditableListPicker({
+  root: tempEmailDomainPickerRoot,
+  input: selectTempEmailDomain,
+  trigger: btnTempEmailDomainMenu,
+  current: tempEmailDomainCurrent,
+  menu: tempEmailDomainMenu,
+  emptyLabel: '请先添加域名',
+  itemLabel: '域名',
+  normalizeItems: normalizeCloudflareTempEmailDomains,
+  normalizeValue: normalizeCloudflareTempEmailDomainValue,
+  onDelete: handleDeleteCloudflareTempEmailDomain,
+  onDeleteError: (error) => showToast(error?.message || '删除 Cloudflare Temp Email 域名失败。', 'error'),
+});
 
 function renderSub2ApiGroupOptions(state = latestState, selectedValue = '') {
   if (!inputSub2ApiGroup) {
@@ -1182,52 +1215,7 @@ function renderSub2ApiGroupOptions(state = latestState, selectedValue = '') {
     options.unshift(selected);
   }
 
-  if (
-    !sub2ApiGroupMenu
-    || typeof sub2ApiGroupMenu.appendChild !== 'function'
-    || typeof document === 'undefined'
-    || typeof document.createElement !== 'function'
-  ) {
-    setSub2ApiGroupSelection(selected || options[0] || DEFAULT_SUB2API_GROUP_OPTIONS[0]);
-    return;
-  }
-
-  sub2ApiGroupMenu.innerHTML = '';
-  options.forEach((name) => {
-    const row = document.createElement('div');
-    row.className = 'sub2api-group-option-row';
-
-    const option = document.createElement('button');
-    option.type = 'button';
-    option.className = 'sub2api-group-option';
-    option.setAttribute('role', 'option');
-    option.setAttribute('aria-selected', name === selected ? 'true' : 'false');
-    option.textContent = name;
-    option.addEventListener('click', () => {
-      setSub2ApiGroupSelection(name, { emit: true });
-      setSub2ApiGroupMenuOpen(false);
-    });
-
-    const deleteButton = document.createElement('button');
-    deleteButton.type = 'button';
-    deleteButton.className = 'sub2api-group-delete';
-    deleteButton.textContent = '删除';
-    deleteButton.title = `删除分组 ${name}`;
-    deleteButton.setAttribute('aria-label', `删除分组 ${name}`);
-    deleteButton.disabled = options.length <= 1;
-    deleteButton.addEventListener('click', (event) => {
-      event.preventDefault();
-      event.stopPropagation();
-      handleDeleteSub2ApiGroup(name).catch((error) => {
-        showToast(error?.message || '删除 SUB2API 分组失败。', 'error');
-      });
-    });
-
-    row.appendChild(option);
-    row.appendChild(deleteButton);
-    sub2ApiGroupMenu.appendChild(row);
-  });
-  setSub2ApiGroupSelection(selected || options[0] || DEFAULT_SUB2API_GROUP_OPTIONS[0]);
+  sub2ApiGroupPicker.render(options, selected || options[0] || DEFAULT_SUB2API_GROUP_OPTIONS[0]);
 }
 let customEmailPoolEntriesState = [];
 
@@ -2730,58 +2718,20 @@ function renderCloudflareDomainOptions(preferredDomain = '') {
   const preferred = normalizeCloudflareDomainValue(preferredDomain);
   const { domains, activeDomain } = getCloudflareDomainsFromState();
   const selected = preferred || activeDomain;
-
-  selectCfDomain.innerHTML = '';
-  if (domains.length === 0) {
-    const option = document.createElement('option');
-    option.value = '';
-    option.textContent = '请先添加域名';
-    selectCfDomain.appendChild(option);
-    selectCfDomain.disabled = true;
-    selectCfDomain.value = '';
-    return;
-  }
-
-  for (const domain of domains) {
-    const option = document.createElement('option');
-    option.value = domain;
-    option.textContent = domain;
-    selectCfDomain.appendChild(option);
-  }
-  selectCfDomain.disabled = false;
-  selectCfDomain.value = domains.includes(selected) ? selected : domains[0];
+  cfDomainPicker.render(domains, domains.includes(selected) ? selected : domains[0] || '');
 }
 
 function renderCloudflareTempEmailDomainOptions(preferredDomain = '') {
   const preferred = normalizeCloudflareTempEmailDomainValue(preferredDomain);
   const { domains, activeDomain } = getCloudflareTempEmailDomainsFromState();
   const selected = preferred || activeDomain;
-
-  selectTempEmailDomain.innerHTML = '';
-  if (domains.length === 0) {
-    const option = document.createElement('option');
-    option.value = '';
-    option.textContent = '请先添加域名';
-    selectTempEmailDomain.appendChild(option);
-    selectTempEmailDomain.disabled = true;
-    selectTempEmailDomain.value = '';
-    return;
-  }
-
-  for (const domain of domains) {
-    const option = document.createElement('option');
-    option.value = domain;
-    option.textContent = domain;
-    selectTempEmailDomain.appendChild(option);
-  }
-  selectTempEmailDomain.disabled = false;
-  selectTempEmailDomain.value = domains.includes(selected) ? selected : domains[0];
+  tempEmailDomainPicker.render(domains, domains.includes(selected) ? selected : domains[0] || '');
 }
 
 function setCloudflareDomainEditMode(editing, options = {}) {
   const { clearInput = false } = options;
   cloudflareDomainEditMode = Boolean(editing);
-  selectCfDomain.style.display = cloudflareDomainEditMode ? 'none' : '';
+  cfDomainPicker.setVisible(!cloudflareDomainEditMode);
   inputCfDomain.style.display = cloudflareDomainEditMode ? '' : 'none';
   btnCfDomainMode.textContent = cloudflareDomainEditMode ? '保存' : '添加';
   if (cloudflareDomainEditMode) {
@@ -2797,7 +2747,7 @@ function setCloudflareDomainEditMode(editing, options = {}) {
 function setCloudflareTempEmailDomainEditMode(editing, options = {}) {
   const { clearInput = false } = options;
   cloudflareTempEmailDomainEditMode = Boolean(editing);
-  selectTempEmailDomain.style.display = cloudflareTempEmailDomainEditMode ? 'none' : '';
+  tempEmailDomainPicker.setVisible(!cloudflareTempEmailDomainEditMode);
   inputTempEmailDomain.style.display = cloudflareTempEmailDomainEditMode ? '' : 'none';
   btnTempEmailDomainMode.textContent = cloudflareTempEmailDomainEditMode ? '保存' : '添加';
   if (cloudflareTempEmailDomainEditMode) {
@@ -9528,6 +9478,46 @@ async function saveCloudflareTempEmailDomainSettings(domains, activeDomain, opti
   }
 }
 
+async function handleDeleteCloudflareDomain(domain) {
+  const targetDomain = normalizeCloudflareDomainValue(domain);
+  if (!targetDomain) {
+    return;
+  }
+
+  const { domains, activeDomain } = getCloudflareDomainsFromState();
+  const nextDomains = domains.filter((item) => item !== targetDomain);
+  if (nextDomains.length === domains.length) {
+    return;
+  }
+
+  const currentDomain = normalizeCloudflareDomainValue(selectCfDomain.value || activeDomain);
+  const nextActiveDomain = currentDomain === targetDomain
+    ? (nextDomains[0] || '')
+    : (nextDomains.includes(currentDomain) ? currentDomain : nextDomains[0] || '');
+  await saveCloudflareDomainSettings(nextDomains, nextActiveDomain, { silent: true });
+  showToast(`已删除 Cloudflare 域名：${targetDomain}`, 'success', 1600);
+}
+
+async function handleDeleteCloudflareTempEmailDomain(domain) {
+  const targetDomain = normalizeCloudflareTempEmailDomainValue(domain);
+  if (!targetDomain) {
+    return;
+  }
+
+  const { domains, activeDomain } = getCloudflareTempEmailDomainsFromState();
+  const nextDomains = domains.filter((item) => item !== targetDomain);
+  if (nextDomains.length === domains.length) {
+    return;
+  }
+
+  const currentDomain = normalizeCloudflareTempEmailDomainValue(selectTempEmailDomain.value || activeDomain);
+  const nextActiveDomain = currentDomain === targetDomain
+    ? (nextDomains[0] || '')
+    : (nextDomains.includes(currentDomain) ? currentDomain : nextDomains[0] || '');
+  await saveCloudflareTempEmailDomainSettings(nextDomains, nextActiveDomain, { silent: true });
+  showToast(`已删除 Cloudflare Temp Email 域名：${targetDomain}`, 'success', 1600);
+}
+
 async function handleAddSub2ApiGroup() {
   if (!sharedFormDialog?.open) {
     showToast('表单弹窗未加载，请刷新扩展后重试。', 'error');
@@ -9606,7 +9596,7 @@ async function handleDeleteSub2ApiGroup(groupName) {
     sub2apiGroupNames: nextGroups,
   });
   renderSub2ApiGroupOptions(latestState, nextSelectedGroup);
-  setSub2ApiGroupMenuOpen(true);
+  sub2ApiGroupPicker.setOpen(true);
   markSettingsDirty(true);
   await saveSettings({ silent: true }).catch(() => { });
   showToast(`已删除 SUB2API 分组：${targetName}`, 'success', 1600);
@@ -10060,9 +10050,14 @@ const payPalManager = window.SidepanelPayPalManager?.createPayPalManager({
   },
   dom: {
     btnAddPayPalAccount,
+    btnPayPalAccountMenu,
+    payPalAccountCurrent,
+    payPalAccountMenu,
+    payPalAccountPickerRoot,
     selectPayPalAccount,
   },
   helpers: {
+    editableListPicker: editableListPickerModule,
     escapeHtml,
     getPayPalAccounts,
     openFormDialog: (options) => {
@@ -11703,18 +11698,6 @@ inputSub2ApiGroup.addEventListener('change', () => {
   markSettingsDirty(true);
   saveSettings({ silent: true }).catch(() => { });
 });
-btnSub2ApiGroupMenu?.addEventListener('click', (event) => {
-  event.stopPropagation();
-  setSub2ApiGroupMenuOpen(!sub2ApiGroupMenuOpen);
-});
-btnSub2ApiGroupMenu?.addEventListener('keydown', (event) => {
-  if (event.key === 'Escape') {
-    setSub2ApiGroupMenuOpen(false);
-  }
-});
-sub2ApiGroupMenu?.addEventListener('click', (event) => {
-  event.stopPropagation();
-});
 btnAddSub2ApiGroup?.addEventListener('click', () => {
   handleAddSub2ApiGroup().catch((error) => {
     showToast(error?.message || '添加 SUB2API 分组失败。', 'error');
@@ -13478,7 +13461,7 @@ document.addEventListener('click', (event) => {
   const clickedInsideFiveSimCountryMenu = Boolean(fiveSimCountryMenuShell?.contains(event.target));
   const clickedInsideNexSmsCountryMenu = Boolean(nexSmsCountryMenuShell?.contains(event.target));
   const clickedInsideProviderOrderMenu = Boolean(phoneSmsProviderOrderMenuShell?.contains(event.target));
-  const clickedInsideSub2ApiGroupPicker = Boolean(sub2ApiGroupPicker?.contains(event.target));
+  const clickedInsideEditableListPicker = isClickInsideEditableListPicker(event.target);
 
   if (configMenuOpen && !clickedInsideConfigMenu) {
     closeConfigMenu();
@@ -13500,8 +13483,8 @@ document.addEventListener('click', (event) => {
   if (providerOrderMenuOpen && !clickedInsideProviderOrderMenu) {
     setPhoneSmsProviderOrderMenuOpen(false);
   }
-  if (sub2ApiGroupMenuOpen && !clickedInsideSub2ApiGroupPicker) {
-    setSub2ApiGroupMenuOpen(false);
+  if (!clickedInsideEditableListPicker) {
+    closeEditableListPickers();
   }
 });
 
@@ -13524,9 +13507,7 @@ document.addEventListener('keydown', (event) => {
   if (btnPhoneSmsProviderOrderMenu?.getAttribute('aria-expanded') === 'true') {
     setPhoneSmsProviderOrderMenuOpen(false);
   }
-  if (sub2ApiGroupMenuOpen) {
-    setSub2ApiGroupMenuOpen(false);
-  }
+  closeEditableListPickers();
 });
 
 window.addEventListener('resize', () => {
diff --git a/tests/sidepanel-account-records-manager.test.js b/tests/sidepanel-account-records-manager.test.js
index bae623c..f2d22f9 100644
--- a/tests/sidepanel-account-records-manager.test.js
+++ b/tests/sidepanel-account-records-manager.test.js
@@ -141,9 +141,13 @@ test('sidepanel html contains account records overlay and manager script', () =>
   assert.match(html, /id="btn-toggle-account-records-selection"/);
   assert.match(html, /id="btn-delete-selected-account-records"/);
   assert.match(html, /id="input-sub2api-default-proxy"/);
+  assert.match(html, /src="editable-list-picker\.js"/);
   assert.match(html, /id="sub2api-group-picker"/);
   assert.match(html, /id="input-sub2api-group" value="codex"/);
   assert.match(html, /id="btn-add-sub2api-group"/);
+  assert.match(html, /id="paypal-account-picker"/);
+  assert.match(html, /id="cf-domain-picker"/);
+  assert.match(html, /id="temp-email-domain-picker"/);
   assert.notEqual(managerIndex, -1);
   assert.notEqual(sidepanelIndex, -1);
   assert.ok(managerIndex < sidepanelIndex);
diff --git a/tests/sidepanel-paypal-manager.test.js b/tests/sidepanel-paypal-manager.test.js
index c5f173a..73281a7 100644
--- a/tests/sidepanel-paypal-manager.test.js
+++ b/tests/sidepanel-paypal-manager.test.js
@@ -5,13 +5,16 @@ const fs = require('node:fs');
 test('sidepanel loads reusable form dialog and paypal manager before sidepanel bootstrap', () => {
   const html = fs.readFileSync('sidepanel/sidepanel.html', 'utf8');
   const formDialogIndex = html.indexOf('<script src="form-dialog.js"></script>');
+  const editableListPickerIndex = html.indexOf('<script src="editable-list-picker.js"></script>');
   const managerIndex = html.indexOf('<script src="paypal-manager.js"></script>');
   const sidepanelIndex = html.indexOf('<script src="sidepanel.js"></script>');
 
   assert.notEqual(formDialogIndex, -1);
+  assert.notEqual(editableListPickerIndex, -1);
   assert.notEqual(managerIndex, -1);
   assert.notEqual(sidepanelIndex, -1);
-  assert.ok(formDialogIndex < managerIndex);
+  assert.ok(formDialogIndex < editableListPickerIndex);
+  assert.ok(editableListPickerIndex < managerIndex);
   assert.ok(managerIndex < sidepanelIndex);
 });
 
@@ -22,6 +25,9 @@ test('sidepanel html contains paypal select and GoPay controls', () => {
   assert.match(html, /id="select-plus-payment-method"/);
   assert.match(html, /id="row-paypal-account"/);
   assert.match(html, /id="select-paypal-account"/);
+  assert.match(html, /id="paypal-account-picker"/);
+  assert.match(html, /id="btn-paypal-account-menu"/);
+  assert.match(html, /id="paypal-account-menu"/);
   assert.match(html, /id="btn-add-paypal-account"/);
   assert.match(html, /id="row-gopay-phone"/);
   assert.match(html, /id="input-gopay-phone"/);
@@ -139,3 +145,88 @@ test('paypal manager saves a paypal account and selects it immediately', async (
   assert.equal(selectNode.disabled, false);
   assert.match(events.at(-1)?.message || '', /已保存 PayPal 账号/);
 });
+
+test('paypal manager uses editable picker and deletes obsolete account', async () => {
+  const source = fs.readFileSync('sidepanel/paypal-manager.js', 'utf8');
+  const windowObject = {};
+  const api = new Function('window', `${source}; return window.SidepanelPayPalManager;`)(windowObject);
+
+  let latestState = {
+    paypalAccounts: [
+      { id: 'pp-1', email: 'old@example.com', password: 'old-secret' },
+      { id: 'pp-2', email: 'next@example.com', password: 'next-secret' },
+    ],
+    currentPayPalAccountId: 'pp-1',
+    paypalEmail: 'old@example.com',
+    paypalPassword: 'old-secret',
+  };
+  const events = [];
+  const renderCalls = [];
+  let pickerConfig = null;
+  const selectNode = {
+    value: '',
+    addEventListener() {},
+  };
+
+  const manager = api.createPayPalManager({
+    state: {
+      getLatestState: () => latestState,
+      syncLatestState(updates) {
+        latestState = { ...latestState, ...updates };
+      },
+    },
+    dom: {
+      btnAddPayPalAccount: { disabled: false, addEventListener() {} },
+      btnPayPalAccountMenu: {},
+      payPalAccountCurrent: {},
+      payPalAccountMenu: {},
+      payPalAccountPickerRoot: {},
+      selectPayPalAccount: selectNode,
+    },
+    helpers: {
+      editableListPicker: {
+        createEditableListPicker(config) {
+          pickerConfig = config;
+          return {
+            render(items, selectedValue) {
+              renderCalls.push({ items, selectedValue });
+              selectNode.value = selectedValue;
+            },
+          };
+        },
+      },
+      escapeHtml: (value) => String(value || ''),
+      getPayPalAccounts: (state) => Array.isArray(state?.paypalAccounts) ? state.paypalAccounts : [],
+      openFormDialog: async () => null,
+      showToast(message, tone) {
+        events.push({ type: 'toast', message, tone });
+      },
+    },
+    runtime: {
+      sendMessage: async (message) => {
+        events.push({ type: 'message', message });
+        if (message.type === 'SAVE_SETTING') {
+          return { ok: true };
+        }
+        throw new Error(`unexpected message ${message.type}`);
+      },
+    },
+  });
+
+  manager.renderPayPalAccounts();
+  assert.equal(renderCalls.at(-1).selectedValue, 'pp-1');
+  assert.equal(pickerConfig.getItemLabel(latestState.paypalAccounts[0]), 'old@example.com');
+
+  await pickerConfig.onDelete('pp-1');
+
+  const saveMessage = events.find((event) => event.type === 'message')?.message;
+  assert.equal(saveMessage.type, 'SAVE_SETTING');
+  assert.deepEqual(
+    saveMessage.payload.paypalAccounts.map((account) => account.id),
+    ['pp-2']
+  );
+  assert.equal(saveMessage.payload.currentPayPalAccountId, 'pp-2');
+  assert.equal(latestState.currentPayPalAccountId, 'pp-2');
+  assert.equal(latestState.paypalEmail, 'next@example.com');
+  assert.match(events.at(-1)?.message || '', /已删除 PayPal 账号：old@example\.com/);
+});