feat(panel/chat): 显隐切换、暂存清空隐藏、菜单避让、待办联动、DTK 关于

- 传送门 desktop 入口，--show 再点一次回 daemon；右键菜单加隐藏
- 暂存区清空后整个面板隐藏
- 右键菜单弹到面板左侧，避免被自己遮挡
- 启动悬停 80ms
- 添加待办后立即打开待办窗口；待办独立图标
- 分词胶囊按浅/深色取色，修复透明不可见
- 关于改用 DAboutDialog
- 聊天消息下方常驻 复制/编辑/重试；助手消息可编辑、可从任意一条重试

src/chat/chatview.cpp

@@ -182,15 +182,16 @@ public:
             connect(fork, &QToolButton::clicked, this,
                     [this]() { Q_EMIT forkRequested(m_index); });
             actions->addWidget(fork);
-            if (m_isLast) {
-                auto *retry = actionButton(tr("重试"), m_actions);
-                connect(retry, &QToolButton::clicked, this,
-                        [this]() { Q_EMIT retryRequested(); });
-                actions->addWidget(retry);
-            }
+            auto *edit = actionButton(tr("编辑"), m_actions);
+            connect(edit, &QToolButton::clicked, this,
+                    [this]() { Q_EMIT editRequested(m_index); });
+            actions->addWidget(edit);
+            auto *retry = actionButton(tr("重试"), m_actions);
+            connect(retry, &QToolButton::clicked, this,
+                    [this]() { Q_EMIT retryRequested(m_index); });
+            actions->addWidget(retry);
         }
         actions->addStretch();
-        m_actions->hide();
         column->addWidget(m_actions);
 
         if (m_isUser) {
@@ -220,21 +221,10 @@ signals:
     void copyRequested(int index);
     void editRequested(int index);
     void forkRequested(int index);
-    void retryRequested();
+    void retryRequested(int index);
     void linkActivated(const QUrl &url);
 
 protected:
-    void enterEvent(QEnterEvent *event) override
-    {
-        m_actions->show();
-        QWidget::enterEvent(event);
-    }
-
-    void leaveEvent(QEvent *event) override
-    {
-        m_actions->hide();
-        QWidget::leaveEvent(event);
-    }
 
 private:
     ChatMessage m_message;