diff --git a/emrg/gui/preload.js b/emrg/gui/preload.js
index b3485800..5c676cd9 100644
--- a/emrg/gui/preload.js
+++ b/emrg/gui/preload.js
@@ -13,6 +13,7 @@ const api = {
   switchSession: (payload) => ipcRenderer.invoke("emrg:switchSession", payload),
   newSession: () => ipcRenderer.invoke("emrg:newSession"),
   deleteSession: (payload) => ipcRenderer.invoke("emrg:deleteSession", payload),
+  renameSession: (payload) => ipcRenderer.invoke("emrg:renameSession", payload),
   setModel: (payload) => ipcRenderer.invoke("emrg:setModel", payload),
   listModels: () => ipcRenderer.invoke("emrg:listModels"),
   saveSettings: (payload) => ipcRenderer.invoke("emrg:saveSettings", payload),
diff --git a/emrg/gui/renderer/css/components.css b/emrg/gui/renderer/css/components.css
index 9bc21362..f6496fcd 100644
--- a/emrg/gui/renderer/css/components.css
+++ b/emrg/gui/renderer/css/components.css
@@ -741,3 +741,32 @@ dialog::backdrop {
   color: var(--text-2);
   margin-bottom: var(--sp-2);
 }
+
+/* ── 右键菜单（对话列表：重命名/删除） ─────────── */
+.ctx-menu {
+  position: fixed;
+  z-index: 9999;
+  min-width: 140px;
+  background: var(--bg-panel);
+  border: 1px solid var(--border);
+  border-radius: var(--radius-card);
+  box-shadow: var(--shadow-lg);
+  padding: 4px;
+  animation: fade-in var(--dur-fast) var(--ease);
+}
+.ctx-item {
+  display: block;
+  width: 100%;
+  text-align: left;
+  padding: 8px 12px;
+  border: none;
+  background: none;
+  border-radius: 8px;
+  font-size: var(--fs-secondary);
+  color: var(--text-1);
+  cursor: pointer;
+  transition: background-color var(--dur-fast) var(--ease);
+}
+.ctx-item:hover { background-color: var(--bg-soft); }
+.ctx-item.danger { color: var(--danger, #e5484d); }
+.ctx-item.danger:hover { background-color: color-mix(in srgb, var(--danger, #e5484d) 10%, transparent); }
diff --git a/emrg/gui/renderer/index.html b/emrg/gui/renderer/index.html
index fb1bfbc9..b052d8bd 100644
--- a/emrg/gui/renderer/index.html
+++ b/emrg/gui/renderer/index.html
@@ -162,6 +162,23 @@ <h2 id="confirm-title">确认</h2>
     </div>
   </dialog>
 
+  <!-- 重命名对话框（对话列表右键 → 重命名） -->
+  <dialog id="rename-dialog">
+    <div class="dialog-card" style="min-width:320px;">
+      <h2>重命名对话</h2>
+      <label>给这段对话起个好记的名字
+        <input type="text" id="rename-input" maxlength="80" placeholder="例如：周报草稿" />
+      </label>
+      <div class="dialog-actions">
+        <button type="button" id="rename-cancel" class="btn btn-ghost">取消</button>
+        <button type="button" id="rename-ok" class="btn btn-primary">保存</button>
+      </div>
+    </div>
+  </dialog>
+
+  <!-- 右键菜单（对话列表：重命名 / 删除） -->
+  <div id="ctx-menu" class="ctx-menu" hidden></div>
+
   <script src="../vendor/marked.min.js"></script>
   <script src="../vendor/dompurify.min.js"></script>
   <script src="../vendor/highlight.custom.js"></script>
diff --git a/emrg/gui/renderer/js/app.js b/emrg/gui/renderer/js/app.js
index 2998140f..fc09b305 100644
--- a/emrg/gui/renderer/js/app.js
+++ b/emrg/gui/renderer/js/app.js
@@ -173,12 +173,34 @@ const App = (() => {
 
   // ── 右键菜单（重命名 / 删除） ───────────
   function showConvMenu(item, sid, title) {
-    // 简单版：确认删除（P3 完善重命名）。右键菜单容器复用 conv-item 定位。
-    Dialogs.showConfirm(EMRG_Copy.COPY.deleteConfirmTitle, EMRG_Copy.COPY.deleteConfirmBody, {
+    // 设计 §3.2：右键菜单 = 重命名 / 删除（删除有友好确认）
+    const menu = $("ctx-menu");
+    menu.innerHTML = "";
+    const mk = (label, danger, action) => {
+      const b = el("button", { class: "ctx-item" + (danger ? " danger" : "") }, label);
+      b.addEventListener("click", () => {
+        hideCtxMenu();
+        action();
+      });
+      menu.appendChild(b);
+    };
+    mk("✏️ 重命名", false, () => Dialogs.showRename(sid, title));
+    mk("🗑 删除对话", true, () => Dialogs.showConfirm(EMRG_Copy.COPY.deleteConfirmTitle, EMRG_Copy.COPY.deleteConfirmBody, {
       okText: "删除",
       danger: true,
       onOk: () => deleteSession(sid),
-    });
+    }));
+    menu.hidden = false;
+    // 定位在右键处，超出视口则上移/左移
+    const rect = item.getBoundingClientRect();
+    menu.style.left = Math.min(rect.right, window.innerWidth - 160) + "px";
+    menu.style.top = Math.min(rect.bottom, window.innerHeight - 80) + "px";
+  }
+
+  function hideCtxMenu() {
+    const menu = $("ctx-menu");
+    menu.hidden = true;
+    menu.innerHTML = "";
   }
 
   // ── 模型切换器 ─────────────────────────
@@ -439,6 +461,11 @@ const App = (() => {
       input.style.height = Math.min(input.scrollHeight, 150) + "px";
     });
 
+    // 右键菜单：点击别处隐藏（showConvMenu 内已绑定选项点击）
+    document.addEventListener("click", (e) => {
+      if (!$("ctx-menu").hidden && !e.target.closest("#ctx-menu")) hideCtxMenu();
+    });
+
     // 快捷键：⌘N 新对话 / ⌘B 折叠侧边栏 / ⌘, 设置 / ESC 停止或关弹窗
     document.addEventListener("keydown", (e) => {
       if (e.metaKey || e.ctrlKey) {
@@ -455,6 +482,7 @@ const App = (() => {
         return;
       }
       if (e.key === "Escape") {
+        hideCtxMenu(); // 右键菜单优先关闭
         const dlgs = document.querySelectorAll("dialog[open]");
         if (dlgs.length) return; // dialog 原生 ESC 处理
         if (state.busy) {
@@ -466,6 +494,7 @@ const App = (() => {
 
     Dialogs.initThemeButtons();
     Dialogs.initModelForm();
+    Dialogs.initRenameDialog();
     initModelSwitcher();
   }
 
diff --git a/emrg/gui/renderer/js/dialogs.js b/emrg/gui/renderer/js/dialogs.js
index 7d21f832..74c24a9c 100644
--- a/emrg/gui/renderer/js/dialogs.js
+++ b/emrg/gui/renderer/js/dialogs.js
@@ -274,6 +274,46 @@ const Dialogs = (() => {
     }
   }
 
+  // ── 重命名对话（右键菜单 → 重命名） ────
+  let renameSid = null;
+  function showRename(sid, currentTitle) {
+    renameSid = sid;
+    const input = $("rename-input");
+    input.value = (currentTitle && currentTitle !== sid) ? currentTitle : "";
+    $("rename-dialog").showModal();
+    input.focus();
+    input.select();
+  }
+
+  async function submitRename() {
+    if (!renameSid) return;
+    const input = $("rename-input");
+    const title = input.value.trim();
+    if (!title) return; // 空名不提交
+    try {
+      await window.emrg.renameSession({ sessionId: renameSid, title });
+      renameSid = null;
+      $("rename-dialog").close();
+      await App.refreshSessions();
+    } catch (e) {
+      Chat.addSystemMessage(`重命名失败了：${e.message}`);
+    }
+  }
+
+  function initRenameDialog() {
+    $("rename-cancel").addEventListener("click", () => {
+      renameSid = null;
+      $("rename-dialog").close();
+    });
+    $("rename-ok").addEventListener("click", submitRename);
+    $("rename-input").addEventListener("keydown", (e) => {
+      if (e.key === "Enter") {
+        e.preventDefault();
+        submitRename();
+      }
+    });
+  }
+
   // ── 确认对话框（替代 confirm/alert） ────
   let confirmCb = null;
   function showConfirm(title, message, opts = {}) {
@@ -302,6 +342,9 @@ const Dialogs = (() => {
   return {
     initThemeButtons,
     initModelForm,
+    initRenameDialog,
+    showRename,
+    submitRename,
     showSettings,
     saveSettings,
     showWelcome,
diff --git a/emrg/gui/test/renderer.smoke.test.js b/emrg/gui/test/renderer.smoke.test.js
index 79dc97ca..b244f83a 100644
--- a/emrg/gui/test/renderer.smoke.test.js
+++ b/emrg/gui/test/renderer.smoke.test.js
@@ -55,6 +55,7 @@ function makeEl(id) {
     insertBefore(c) { this.children.unshift(c); return c; },
     remove() {},
     focus() {},
+    select() {},
   };
   return node;
 }
@@ -66,6 +67,7 @@ const ELEMENT_IDS = [
   "set-model", "pick-dir-btn", "theme-options", "welcome-dialog", "welcome-api-key", "welcome-base-url",
   "welcome-model", "welcome-project-dir", "welcome-pick-btn", "welcome-save", "confirm-dialog",
   "confirm-title", "confirm-message", "confirm-cancel", "confirm-ok", "main",
+  "rename-dialog", "rename-input", "rename-cancel", "rename-ok", "ctx-menu",
   "model-list", "add-model-btn", "model-form", "model-form-name", "model-form-id",
   "model-form-vision", "model-form-save", "model-form-cancel", "back-to-bottom",
 ];
@@ -234,3 +236,38 @@ test("多模型管理：modelDetails 加载渲染 + saveSettings 传 models 数
   const gpt = saved.models.find((m) => m.name === "gpt-4o");
   assert.strictEqual(gpt.vision, true);
 });
+
+test("右键菜单：重命名对话框 → renameSession 调用（设计 §3.2）", async () => {
+  let renamed = null;
+  const { ctx, els } = makeSandbox({
+    renameSession: async (payload) => {
+      renamed = payload;
+      return { ok: true, title: payload.title };
+    },
+    listSessions: async () => [
+      { session_id: "s1", title: "旧标题", created_at: "2026-08-06T00:00:00" },
+    ],
+  });
+  // 模拟 App.showConvMenu（右键菜单构建）
+  await tick();
+  vm.runInContext('App.showConvMenu({ getBoundingClientRect: () => ({ right: 100, bottom: 100 }) }, "s1", "旧标题")', ctx);
+  const menu = els["ctx-menu"];
+  assert.strictEqual(menu.hidden, false, "右键菜单应显示");
+  assert.ok(menu.children.length >= 2, "菜单应有 重命名 + 删除 两项");
+  const labels = menu.children.map((c) => c.textContent);
+  assert.ok(labels.some((l) => l.includes("重命名")), `菜单应含重命名，实际 ${labels}`);
+  assert.ok(labels.some((l) => l.includes("删除")), `菜单应含删除，实际 ${labels}`);
+
+  // 点击重命名 → 对话框打开
+  await vm.runInContext('Dialogs.showRename("s1", "旧标题")', ctx);
+  assert.strictEqual(els["rename-dialog"].open, true, "重命名对话框应打开");
+  assert.strictEqual(els["rename-input"].value, "旧标题", "输入框预填当前标题");
+
+  // 提交新标题 → renameSession 调用
+  els["rename-input"].value = "新标题";
+  await vm.runInContext("Dialogs.submitRename()", ctx);
+  await tick();
+  assert.ok(renamed, "renameSession 应被调用");
+  assert.strictEqual(renamed.sessionId, "s1");
+  assert.strictEqual(renamed.title, "新标题");
+});