no message

env-store.js

@@ -63,8 +63,13 @@
     await storage().set({ [ACTIVE_ENV_KEY]: envId });
   }
 
+  const MAX_ENVIRONMENTS = 5;
+
   async function createEnvironment(name) {
     const { environments } = await loadEnvironments();
+    if (environments.length >= MAX_ENVIRONMENTS) {
+      throw new Error(`最多 ${MAX_ENVIRONMENTS} 个环境`);
+    }
     const env = { id: genId(), name, configs: [] };
     environments.push(env);
     await saveEnvironments(environments, env.id);
@@ -133,6 +138,7 @@
   return {
     ENV_KEY,
     ACTIVE_ENV_KEY,
+    MAX_ENVIRONMENTS,
     loadEnvironments,
     saveEnvironments,
     getActiveEnv,

popup.css

@@ -386,6 +386,13 @@ h2 {
   justify-content: center;
 }
 
+.btn-lock {
+  position: fixed;
+  top: 8px;
+  right: 8px;
+  z-index: 10;
+}
+
 .form-group label {
   display: block;
   margin-bottom: 4px;
@@ -422,57 +429,59 @@ h2 {
   font-size: 11px;
 }
 
-.selector-help {
+.advanced-options {
   background: #16213e;
   border: 1px solid #0f3460;
   border-radius: 6px;
-  padding: 8px 10px;
+  padding: 10px 12px;
   margin-bottom: 12px;
 }
 
-.selector-help summary {
+.advanced-options summary {
   cursor: pointer;
   color: #a0a0b0;
   font-size: 12px;
   user-select: none;
   list-style: none;
+  font-weight: 500;
 }
 
-.selector-help summary::-webkit-details-marker {
+.advanced-options summary::-webkit-details-marker {
   display: none;
 }
 
-.selector-help summary::before {
-  content: "▶ ";
+.advanced-options summary::before {
+  content: "▶";
   color: #e94560;
   font-size: 10px;
+  margin-right: 10px;
   transition: transform 0.2s;
   display: inline-block;
 }
 
-.selector-help[open] summary::before {
-  content: "▼ ";
+.advanced-options[open] summary::before {
+  content: "▼";
 }
 
-.selector-help-body {
-  margin-top: 10px;
-  padding-top: 8px;
+.advanced-options-body {
+  margin-top: 12px;
+  padding-top: 10px;
   border-top: 1px dashed #0f3460;
 }
 
-.selector-help-body p {
+.advanced-options-body p {
   font-size: 11px;
   line-height: 1.6;
   color: #a0a0b0;
   margin-bottom: 6px;
 }
 
-.selector-help-body .help-tip {
+.advanced-options-body .help-tip {
   color: #e94560;
   font-weight: 500;
 }
 
-.selector-help-body code {
+.advanced-options-body code {
   background: #0f1d3a;
   padding: 1px 4px;
   border-radius: 3px;
@@ -481,7 +490,7 @@ h2 {
   font-family: Consolas, Monaco, monospace;
 }
 
-.selector-help-body kbd {
+.advanced-options-body kbd {
   background: #0f1d3a;
   border: 1px solid #0f3460;
   border-radius: 3px;
@@ -491,7 +500,7 @@ h2 {
   font-family: Consolas, Monaco, monospace;
 }
 
-.selector-help-body .icon-arrow {
+.advanced-options-body .icon-arrow {
   display: inline-block;
   padding: 1px 5px;
   background: #0f3460;
@@ -500,7 +509,7 @@ h2 {
   font-size: 11px;
 }
 
-.selector-help-body .rule-tag {
+.advanced-options-body .rule-tag {
   display: inline-block;
   padding: 1px 5px;
   margin: 0 2px;
@@ -512,6 +521,14 @@ h2 {
   font-family: Consolas, Monaco, monospace;
 }
 
+.selector-tutorial {
+  margin: 8px 0 10px;
+  padding: 8px 10px;
+  background: rgba(15, 52, 96, 0.25);
+  border-left: 3px solid #0f3460;
+  border-radius: 4px;
+}
+
 .password-wrapper {
   display: flex;
   gap: 6px;
@@ -697,6 +714,47 @@ h2 {
   font-size: 13px;
 }
 
+/* 空状态：缺省图标 */
+.empty-state {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  padding: 32px 16px 24px;
+  text-align: center;
+}
+
+.empty-icon {
+  color: #0f3460;
+  margin-bottom: 14px;
+  opacity: 0.85;
+}
+
+.empty-icon svg {
+  display: block;
+}
+
+.empty-text {
+  font-size: 14px;
+  color: #a0a0b0;
+  margin-bottom: 6px;
+  font-weight: 500;
+}
+
+.empty-sub {
+  font-size: 11px;
+  color: #555;
+  line-height: 1.6;
+}
+
+/* 禁用按钮 */
+.btn-io.btn-disabled,
+.btn-io:disabled {
+  opacity: 0.4;
+  cursor: not-allowed;
+  pointer-events: none;
+}
+
 .toast {
   position: fixed;
   bottom: 10px;
@@ -810,6 +868,70 @@ h2 {
   flex: 1;
 }
 
+/* 环境管理对话框列表 */
+.env-manage-list {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+  max-height: 280px;
+  overflow-y: auto;
+  margin-bottom: 8px;
+}
+
+.env-manage-row {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 8px 10px;
+  background: #16213e;
+  border: 1px solid #0f3460;
+  border-radius: 4px;
+}
+
+.env-manage-row.active {
+  border-color: #e94560;
+  background: rgba(233, 69, 96, 0.08);
+}
+
+.env-manage-name {
+  font-size: 13px;
+  color: #e0e0e0;
+  display: flex;
+  align-items: center;
+  gap: 6px;
+}
+
+.env-manage-count {
+  color: #a0a0b0;
+  font-size: 11px;
+}
+
+.env-manage-active-mark {
+  display: inline-block;
+  padding: 1px 6px;
+  background: #e94560;
+  color: #fff;
+  font-size: 10px;
+  border-radius: 8px;
+}
+
+.env-manage-actions {
+  display: flex;
+  gap: 6px;
+}
+
+.env-manage-actions button {
+  padding: 4px 10px;
+  font-size: 12px;
+}
+
+.env-manage-empty {
+  text-align: center;
+  color: #a0a0b0;
+  font-size: 12px;
+  padding: 20px;
+}
+
 .strength-block {
   margin-top: 10px;
 }

popup.html

@@ -28,23 +28,21 @@
 
   <div class="container" id="mainContainer" style="display:none;">
     <header>
+      <button type="button" id="lockBtn" class="btn-lock" title="锁定（清除内存中的明文）">🔒</button>
       <div class="header-title">
         <img src="icons/icon128.png" alt="logo" class="header-logo">
         <h1>Auto Login Manager</h1>
-        <button type="button" id="lockBtn" class="btn-lock" title="锁定（清除内存中的明文）">🔒 锁定</button>
       </div>
       <div class="env-bar">
         <label class="env-label">当前环境</label>
         <div class="env-controls">
           <select id="envSelect" class="env-select"></select>
-          <button type="button" id="addEnvBtn" class="btn-env" title="新建环境">+</button>
-          <button type="button" id="renameEnvBtn" class="btn-env" title="重命名当前环境">✎</button>
-          <button type="button" id="deleteEnvBtn" class="btn-env btn-env-danger" title="删除当前环境">🗑</button>
+          <button type="button" id="envManageBtn" class="btn-env" title="管理环境（新建 / 重命名 / 删除）">⚙</button>
         </div>
       </div>
     </header>
 
-    <section class="add-section">
+    <section class="add-section" id="addSection">
       <h2>添加域名配置</h2>
       <div class="form-group">
         <label for="domain">域名 / URL 匹配规则</label>
@@ -54,11 +52,6 @@
         </div>
         <small>支持通配符 *。带 / 时按 hostname+path 匹配，如 oa.com/login/*；不带 / 时只匹配域名</small>
       </div>
-      <div class="form-group">
-        <label for="alias">别名（可选）</label>
-        <input type="text" id="alias" placeholder="例如: 公司OA、GitLab、邮箱">
-        <small>方便识别该配置，留空则显示域名</small>
-      </div>
       <div class="form-group">
         <label for="username">用户名</label>
         <input type="text" id="username" placeholder="输入用户名">
@@ -70,57 +63,62 @@
           <button class="toggle-pwd" type="button" data-target="password">显示</button>
         </div>
       </div>
-      <div class="form-row">
-        <div class="form-group form-group-inline">
-          <label for="autoSubmit">自动提交登录</label>
-          <select id="autoSubmit">
-            <option value="true">是 - 自动点击登录按钮</option>
-            <option value="false">否 - 仅填充不提交</option>
-          </select>
-        </div>
-        <div class="form-group form-group-inline">
-          <label for="enabled">启用</label>
-          <label class="toggle-switch">
-            <input type="checkbox" id="enabled" checked>
-            <span class="toggle-slider"></span>
-          </label>
-          <small>关闭后该配置不再参与匹配（保留数据）</small>
-        </div>
-      </div>
       <div class="form-group">
-        <label for="delayMs">填充延迟（毫秒，可选）</label>
-        <input type="number" id="delayMs" min="0" max="10000" step="100" placeholder="留空=默认 300ms，可填 500-2000 用于 SPA 页面">
-        <small>某些页面（Ant Design、ASP.NET）需 JS 初始化，立即填充会失效</small>
+        <label for="alias">别名（可选）</label>
+        <input type="text" id="alias" placeholder="例如: 公司OA、GitLab、邮箱">
+        <small>方便识别该配置，留空则显示域名</small>
       </div>
-      <details class="selector-help">
-        <summary>高级选项：自定义输入框和登录按钮位置（选填）</summary>
-        <div class="selector-help-body">
-          <p class="help-tip">下面三项通常<strong>留空即可</strong>，插件会自动找到登录框。只有当自动填充失败、或填错位置时才需要填。</p>
-          <p class="help-step">1. 在登录页面按 <kbd>F12</kbd> 打开开发者工具，切到"Elements（元素）"标签</p>
-          <p class="help-step">2. 点开发者工具左上角的 <span class="icon-arrow">箭头图标</span>，再去点页面上的输入框/按钮</p>
-          <p class="help-step">3. 工具会跳到对应的 HTML 行，在 <code>&lt;input&gt;</code> 或 <code>&lt;button&gt;</code> 标签上看 <code>id</code>、<code>name</code>、<code>class</code>、<code>type</code> 属性</p>
-          <p class="help-step">4. 按 <span class="rule-tag">#id</span>、<span class="rule-tag">.class</span>、<span class="rule-tag">[name=xxx]</span>、<span class="rule-tag">tag[属性=值]</span> 规则组合填写即可</p>
+      <details class="advanced-options">
+        <summary>高级选项（选填，默认即可）</summary>
+        <div class="advanced-options-body">
+          <div class="form-group">
+            <label for="autoSubmit">自动提交登录</label>
+            <select id="autoSubmit">
+              <option value="true">是 - 自动点击登录按钮</option>
+              <option value="false">否 - 仅填充不提交</option>
+            </select>
+          </div>
+          <div class="form-group">
+            <label for="enabled">启用 / 禁用</label>
+            <label class="toggle-switch">
+              <input type="checkbox" id="enabled" checked>
+              <span class="toggle-slider"></span>
+            </label>
+            <small>禁用后该条配置将不会生效</small>
+          </div>
+          <div class="form-group">
+            <label for="delayMs">填充延迟（毫秒，可选）</label>
+            <input type="number" id="delayMs" min="0" max="10000" step="100" placeholder="留空=默认 300ms，可填 500-2000 用于 SPA 页面">
+            <small>某些页面（Ant Design、ASP.NET）需 JS 初始化，立即填充会失效</small>
+          </div>
+          <div class="selector-tutorial">
+            <p class="help-tip">下面三项通常<strong>留空即可</strong>，插件会自动找到登录框。只有当自动填充失败、或填错位置时才需要填。</p>
+            <p class="help-step">1. 在登录页面按 <kbd>F12</kbd> 打开开发者工具，切到"Elements（元素）"标签</p>
+            <p class="help-step">2. 点开发者工具左上角的 <span class="icon-arrow">箭头图标</span>，再去点页面上的输入框/按钮</p>
+            <p class="help-step">3. 工具会跳到对应的 HTML 行，在 <code>&lt;input&gt;</code> 或 <code>&lt;button&gt;</code> 标签上看 <code>id</code>、<code>name</code>、<code>class</code>、<code>type</code> 属性</p>
+            <p class="help-step">4. 按 <span class="rule-tag">#id</span>、<span class="rule-tag">.class</span>、<span class="rule-tag">[name=xxx]</span>、<span class="rule-tag">tag[属性=值]</span> 规则组合填写即可</p>
+          </div>
+          <div class="form-group">
+            <label>用户名输入框位置</label>
+            <input type="text" id="usernameSelector" placeholder="留空=自动查找，如 #username 或 input[name=account]">
+            <small>留空即可。填错会导致用户名填不进框。</small>
+          </div>
+          <div class="form-group">
+            <label>密码输入框位置</label>
+            <input type="text" id="passwordSelector" placeholder="留空=自动查找，如 #password 或 input[type=password]">
+            <small>留空即可。填错会导致密码填不进框。</small>
+          </div>
+          <div class="form-group">
+            <label>登录按钮位置</label>
+            <input type="text" id="submitSelector" placeholder="留空=自动查找，如 #loginBtn 或 button[type=submit]">
+            <small>留空即可。填错会导致不会自动点击登录。</small>
+          </div>
         </div>
       </details>
-      <div class="form-group">
-        <label>用户名输入框位置</label>
-        <input type="text" id="usernameSelector" placeholder="留空=自动查找，如 #username 或 input[name=account]">
-        <small>留空即可。填错会导致用户名填不进框。</small>
-      </div>
-      <div class="form-group">
-        <label>密码输入框位置</label>
-        <input type="text" id="passwordSelector" placeholder="留空=自动查找，如 #password 或 input[type=password]">
-        <small>留空即可。填错会导致密码填不进框。</small>
-      </div>
-      <div class="form-group">
-        <label>登录按钮位置</label>
-        <input type="text" id="submitSelector" placeholder="留空=自动查找，如 #loginBtn 或 button[type=submit]">
-        <small>留空即可。填错会导致不会自动点击登录。</small>
-      </div>
       <button id="addBtn" class="btn-primary">添加配置</button>
     </section>
 
-    <section class="list-section">
+    <section class="list-section" id="listSection">
       <div class="list-header">
         <h2>已配置域名</h2>
         <div class="list-actions">
@@ -144,6 +142,19 @@
 
   <div id="toast" class="toast"></div>
 
+  <!-- 环境管理对话框：列出所有环境，每行带编辑/删除，底部新建按钮 -->
+  <div id="envManageModal" class="modal">
+    <div class="modal-content">
+      <h3>环境管理</h3>
+      <div id="envManageList" class="env-manage-list"></div>
+      <div class="modal-warn" id="envManageWarn" style="display:none;"></div>
+      <div class="modal-actions">
+        <button type="button" id="envManageClose" class="btn-edit">关闭</button>
+        <button type="button" id="envManageAdd" class="btn-primary">+ 新建环境</button>
+      </div>
+    </div>
+  </div>
+
   <div id="envModal" class="modal">
     <div class="modal-content">
       <h3 id="envModalTitle">新建环境</h3>

popup.js

@@ -13,6 +13,8 @@ document.addEventListener("DOMContentLoaded", () => {
   const submitSelectorInput = $("submitSelector");
   const addBtn = $("addBtn");
   const configList = $("configList");
+  const addSection = $("addSection");
+  const listSection = $("listSection");
   const fillCurrentBtn = $("fillCurrent");
   const fillDomainBtn = $("fillDomain");
   const exportBtn = $("exportBtn");
@@ -34,9 +36,12 @@ document.addEventListener("DOMContentLoaded", () => {
 
   // 环境栏
   const envSelect = $("envSelect");
-  const addEnvBtn = $("addEnvBtn");
-  const renameEnvBtn = $("renameEnvBtn");
-  const deleteEnvBtn = $("deleteEnvBtn");
+  const envManageBtn = $("envManageBtn");
+  const envManageModal = $("envManageModal");
+  const envManageList = $("envManageList");
+  const envManageWarn = $("envManageWarn");
+  const envManageClose = $("envManageClose");
+  const envManageAdd = $("envManageAdd");
   const envModal = $("envModal");
   const envModalTitle = $("envModalTitle");
   const envNameInput = $("envNameInput");
@@ -474,47 +479,104 @@ document.addEventListener("DOMContentLoaded", () => {
     showToast("已切换环境");
   });
 
-  addEnvBtn.addEventListener("click", async () => {
-    const name = await openEnvModal("create");
-    if (!name) return;
-    await createEnvironment(name);
-    await renderEnvSelect();
-    resetForm();
-    await renderConfigList();
-    showToast(`已创建环境「${name}」`);
-  });
+  // ---------- 环境管理对话框 ----------
+  function openEnvManageModal() {
+    envManageWarn.textContent = "";
+    envManageWarn.style.display = "none";
+    renderEnvManageList();
+    envManageModal.classList.add("show");
+  }
 
-  renameEnvBtn.addEventListener("click", async () => {
-    const env = await getActiveEnv();
-    if (!env) return;
-    const name = await openEnvModal("rename", env.name);
-    if (!name) return;
-    await renameEnvironment(env.id, name);
-    await renderEnvSelect();
-    showToast("已重命名");
-  });
+  function closeEnvManageModal() {
+    envManageModal.classList.remove("show");
+  }
 
-  deleteEnvBtn.addEventListener("click", async () => {
-    const env = await getActiveEnv();
-    if (!env) return;
-    const { environments } = await loadEnvironments();
-    if (environments.length <= 1) {
-      showToast("至少保留一个环境");
+  async function renderEnvManageList() {
+    const { environments, activeEnvId } = await loadEnvironments();
+    envManageList.innerHTML = "";
+
+    if (environments.length === 0) {
+      envManageList.innerHTML = '<div class="env-manage-empty">暂无环境</div>';
       return;
     }
-    const cnt = env.configs?.length || 0;
-    const msg = cnt > 0
-      ? `环境「${env.name}」下有 ${cnt} 条配置，确认删除？（将一并删除这些配置）`
-      : `确认删除环境「${env.name}」？`;
-    if (!confirm(msg)) return;
+
+    environments.forEach((env) => {
+      const row = document.createElement("div");
+      row.className = "env-manage-row" + (env.id === activeEnvId ? " active" : "");
+
+      const nameSpan = document.createElement("span");
+      nameSpan.className = "env-manage-name";
+      const cnt = env.configs?.length || 0;
+      const activeMark = env.id === activeEnvId ? '<span class="env-manage-active-mark">当前</span>' : "";
+      nameSpan.innerHTML = `${escapeHtml(env.name)} <span class="env-manage-count">(${cnt})</span> ${activeMark}`;
+
+      const actions = document.createElement("div");
+      actions.className = "env-manage-actions";
+
+      const editBtn = document.createElement("button");
+      editBtn.className = "btn-edit";
+      editBtn.textContent = "重命名";
+      editBtn.addEventListener("click", async () => {
+        const newName = await openEnvModal("rename", env.name);
+        if (!newName) return;
+        try {
+          await renameEnvironment(env.id, newName);
+          await renderEnvManageList();
+          await renderEnvSelect();
+          showToast("已重命名");
+        } catch (err) {
+          showToast(err.message || "重命名失败");
+        }
+      });
+
+      const delBtn = document.createElement("button");
+      delBtn.className = "btn-danger";
+      delBtn.textContent = "删除";
+      delBtn.addEventListener("click", async () => {
+        if (environments.length <= 1) {
+          showToast("至少保留一个环境");
+          return;
+        }
+        const cnt2 = env.configs?.length || 0;
+        const msg = cnt2 > 0
+          ? `环境「${env.name}」下有 ${cnt2} 条配置，确认删除？（将一并删除这些配置）`
+          : `确认删除环境「${env.name}」？`;
+        if (!confirm(msg)) return;
+        try {
+          await deleteEnvironment(env.id);
+          await renderEnvManageList();
+          await renderEnvSelect();
+          resetForm();
+          await renderConfigList();
+          showToast("已删除环境");
+        } catch (err) {
+          showToast(err.message || "删除失败");
+        }
+      });
+
+      actions.appendChild(editBtn);
+      actions.appendChild(delBtn);
+      row.appendChild(nameSpan);
+      row.appendChild(actions);
+      envManageList.appendChild(row);
+    });
+  }
+
+  envManageBtn.addEventListener("click", openEnvManageModal);
+  envManageClose.addEventListener("click", closeEnvManageModal);
+
+  envManageAdd.addEventListener("click", async () => {
+    const name = await openEnvModal("create");
+    if (!name) return;
     try {
-      await deleteEnvironment(env.id);
+      await createEnvironment(name);
+      await renderEnvManageList();
       await renderEnvSelect();
       resetForm();
       await renderConfigList();
-      showToast("已删除环境");
+      showToast(`已创建环境「${name}」`);
     } catch (err) {
-      showToast(err.message || "删除失败");
+      showToast(err.message || "创建失败");
     }
   });
 
@@ -523,8 +585,34 @@ document.addEventListener("DOMContentLoaded", () => {
     const configs = await loadConfigs();
     configList.innerHTML = "";
 
-    if (configs.length === 0) {
-      configList.innerHTML = '<div class="empty-msg">暂无配置，请在上方添加</div>';
+    // 配置为 0：禁用导出，列表在前；非 0：启用导出，添加表单在前
+    const isEmpty = configs.length === 0;
+    exportBtn.disabled = isEmpty;
+    exportBtn.classList.toggle("btn-disabled", isEmpty);
+    const parent = addSection.parentElement;
+    if (isEmpty) {
+      // 空状态：add-section 在上，list-section 在下（已是默认顺序，确保如此）
+      if (parent.children[0] !== addSection) parent.insertBefore(addSection, listSection);
+    } else {
+      // 非空：list-section 在上，add-section 在下
+      if (parent.children[0] !== listSection) parent.insertBefore(listSection, addSection);
+    }
+
+    if (isEmpty) {
+      configList.innerHTML = `
+        <div class="empty-state">
+          <div class="empty-icon">
+            <svg viewBox="0 0 24 24" width="56" height="56" fill="none" stroke="currentColor" stroke-width="1.4" stroke-linecap="round" stroke-linejoin="round">
+              <rect x="3" y="5" width="18" height="14" rx="2"/>
+              <path d="M3 10h18"/>
+              <circle cx="7" cy="14.5" r="0.6" fill="currentColor"/>
+              <path d="M11 14.5h6"/>
+            </svg>
+          </div>
+          <div class="empty-text">暂无配置</div>
+          <div class="empty-sub">在上方填写域名 / 用户名 / 密码后点击「添加配置」</div>
+        </div>
+      `;
       return;
     }
 
@@ -562,6 +650,8 @@ document.addEventListener("DOMContentLoaded", () => {
         );
         await saveConfigs(updated);
         renderConfigList();
+        renderEnvSelect();
+        if (envManageModal.classList.contains("show")) renderEnvManageList();
         showToast(cfg.enabled === false ? "已启用" : "已禁用");
       });
 
@@ -593,6 +683,8 @@ document.addEventListener("DOMContentLoaded", () => {
         await saveConfigs(updated);
         showToast("已删除");
         renderConfigList();
+        renderEnvSelect();
+        if (envManageModal.classList.contains("show")) renderEnvManageList();
         if (editingId === cfg.id) {
           resetForm();
         }
@@ -670,6 +762,8 @@ document.addEventListener("DOMContentLoaded", () => {
     await saveConfigs(configs);
     resetForm();
     renderConfigList();
+    renderEnvSelect();
+    if (envManageModal.classList.contains("show")) renderEnvManageList();
   });
 
   fillCurrentBtn.addEventListener("click", async () => {
@@ -689,21 +783,42 @@ document.addEventListener("DOMContentLoaded", () => {
     }
 
     if (matched.length === 1) {
-      chrome.tabs.sendMessage(tab.id, {
-        action: "manualFill",
-        config: matched[0],
-      });
-      showToast("已发送填充指令");
+      try {
+        const resp = await chrome.tabs.sendMessage(tab.id, {
+          action: "manualFill",
+          config: matched[0],
+        });
+        if (resp && resp.success) {
+          showToast("已填充，请确认");
+        } else {
+          showToast("已发送但未找到登录表单，请确认页面已加载完成");
+        }
+      } catch (err) {
+        // content script 未注入：常见于安装扩展前已打开的页面
+        if (/Could not establish connection|Receiving end does not exist/i.test(err.message)) {
+          showToast("页面未注入脚本，请刷新页面后重试");
+        } else {
+          showToast("发送失败：" + (err.message || err));
+        }
+      }
       return;
     }
 
     // 多个环境命中：发到 content.js 由它弹选择菜单
-    chrome.tabs.sendMessage(tab.id, {
-      action: "manualFillMulti",
-      configs: matched,
-      tabUrl: tab.url,
-    });
-    showToast(`命中 ${matched.length} 个环境配置，请在页面选择`);
+    try {
+      await chrome.tabs.sendMessage(tab.id, {
+        action: "manualFillMulti",
+        configs: matched,
+        tabUrl: tab.url,
+      });
+      showToast(`命中 ${matched.length} 个环境配置，请在页面选择`);
+    } catch (err) {
+      if (/Could not establish connection|Receiving end does not exist/i.test(err.message)) {
+        showToast("页面未注入脚本，请刷新页面后重试");
+      } else {
+        showToast("发送失败：" + (err.message || err));
+      }
+    }
   });
 
   fillDomainBtn.addEventListener("click", async () => {

tests/env-store.test.js

@@ -118,6 +118,18 @@ describe("env-store - 环境 CRUD", () => {
     const env = await EnvStore.getActiveEnv();
     assert.equal(env.id, "e3");
   });
+
+  it("超过 5 个环境时抛错", async () => {
+    // 已有 3 个，再加 2 个到上限
+    await EnvStore.createEnvironment("env4");
+    await EnvStore.createEnvironment("env5");
+    const { environments } = await EnvStore.loadEnvironments();
+    assert.equal(environments.length, 5);
+    // 第 6 个应被拒绝
+    await assert.rejects(() => EnvStore.createEnvironment("env6"), /最多 5 个环境/);
+    const after = await EnvStore.loadEnvironments();
+    assert.equal(after.environments.length, 5);
+  });
 });
 
 describe("env-store - 配置 CRUD", () => {