新增截图OCR识别昵称功能

- GUI新增「从截图识别」按钮
- 截屏后用EasyOCR识别文字（GPU=False）
- 提取QQ昵称模式：[头衔]用户名、@用户名、行首用户名
- 自动去重并入库config.json的qq_nicknames
- Windows OCR作为后备方案

gui.py

@@ -261,7 +261,13 @@ class MsgBotApp(ctk.CTk):
             nick_btn_frame, text="刷新", width=56,
             command=self._refresh_nick_list
         )
-        self._refresh_nick_btn.pack(side="left")
+        self._refresh_nick_btn.pack(side="left", padx=(0, 4))
+
+        self._ocr_nick_btn = ctk.CTkButton(
+            nick_btn_frame, text="📸 从截图识别", width=100,
+            command=self._ocr_nicknames_from_screenshot
+        )
+        self._ocr_nick_btn.pack(side="left")
 
         # 初始加载昵称列表
         self._refresh_nick_list()
@@ -423,6 +429,180 @@ class MsgBotApp(ctk.CTk):
         except Exception as e:
             self._log(f"⚠ 删除失败: {e}")
 
+    def _ocr_nicknames_from_screenshot(self):
+        """截图OCR识别昵称：最小化窗口→截屏→OCR→提取昵称→入库"""
+        self._log("📸 正在截屏，请确保QQ聊天窗口可见...")
+        self._ocr_nick_btn.configure(state="disabled", text="截屏中...")
+
+        def _do_ocr():
+            try:
+                import time
+                time.sleep(1.5)  # 等待用户切换到QQ窗口
+
+                # 截取全屏
+                screenshot = self._capture_screen()
+                if screenshot is None:
+                    self._log_queue.put("⚠ 截屏失败")
+                    return
+
+                self._log_queue.put("🔍 OCR识别中...")
+
+                # OCR识别
+                try:
+                    import easyocr
+                    reader = easyocr.Reader(['ch_sim', 'en'], gpu=False, verbose=False)
+                    results = reader.readtext(screenshot, detail=0)
+                except Exception as e:
+                    self._log_queue.put(f"⚠ EasyOCR失败: {e}，尝试Windows OCR...")
+                    results = self._win_ocr(screenshot)
+
+                if not results:
+                    self._log_queue.put("⚠ OCR未识别到任何文字")
+                    return
+
+                self._log_queue.put(f"📝 OCR识别到 {len(results)} 段文字")
+
+                # 从OCR结果中提取昵称
+                nicks_found = self._extract_nicknames_from_ocr(results)
+                if not nicks_found:
+                    self._log_queue.put("⚠ 未检测到QQ昵称模式（[头衔]用户名 或 @用户名）")
+                    return
+
+                # 添加到配置
+                self.cfg = load_config()
+                existing = self.cfg.setdefault("qq_nicknames", [])
+                added = []
+                for n in nicks_found:
+                    if n not in existing:
+                        existing.append(n)
+                        added.append(n)
+
+                if added:
+                    save_config(self.cfg)
+                    self._refresh_nick_list()
+                    self._log_queue.put(f"✅ 新增 {len(added)} 个昵称: {', '.join(added)}")
+                else:
+                    self._log_queue.put(f"ℹ 识别到的昵称已全部存在: {', '.join(nicks_found)}")
+
+            except Exception as e:
+                self._log_queue.put(f"⚠ 截图OCR异常: {e}")
+            finally:
+                # 恢复按钮
+                self.after(0, lambda: self._ocr_nick_btn.configure(
+                    state="normal", text="📸 从截图识别"))
+
+        threading.Thread(target=_do_ocr, daemon=True).start()
+
+    def _capture_screen(self):
+        """使用Windows API截取全屏，返回PIL Image"""
+        try:
+            import win32gui
+            import win32ui
+            import win32con
+            from PIL import Image
+
+            # 获取屏幕尺寸
+            screen_w = win32gui.GetSystemMetrics(win32con.SM_CXSCREEN)
+            screen_h = win32gui.GetSystemMetrics(win32con.SM_CYSCREEN)
+
+            # 创建设备上下文
+            hdesktop = win32gui.GetDesktopWindow()
+            hdc = win32gui.GetDC(hdesktop)
+            mfcDC = win32ui.CreateDCFromHandle(hdc)
+            saveDC = mfcDC.CreateCompatibleDC()
+
+            # 创建位图
+            saveBitMap = win32ui.CreateBitmap()
+            saveBitMap.CreateCompatibleBitmap(mfcDC, screen_w, screen_h)
+            saveDC.SelectObject(saveBitMap)
+
+            # 复制屏幕
+            saveDC.BitBlt((0, 0), (screen_w, screen_h), mfcDC, (0, 0), win32con.SRCCOPY)
+
+            # 转为PIL Image
+            bmpinfo = saveBitMap.GetInfo()
+            bmpstr = saveBitMap.GetBitmapBits(True)
+            img = Image.frombuffer('RGB', (bmpinfo['bmWidth'], bmpinfo['bmHeight']),
+                                   bmpstr, 'raw', 'BGRX', 0, 1)
+
+            # 清理
+            win32gui.DeleteObject(saveBitMap.GetHandle())
+            saveDC.DeleteDC()
+            mfcDC.DeleteDC()
+            win32gui.ReleaseDC(hdesktop, hdc)
+
+            return img
+        except Exception as e:
+            logger.error(f"截屏失败: {e}")
+            return None
+
+    def _win_ocr(self, image):
+        """Windows OCR后备方案（无需GPU）"""
+        try:
+            import io
+            from PIL import Image
+            # 保存为临时文件
+            tmp_path = os.path.join(os.environ.get('TEMP', '.'), '_ocr_temp.png')
+            image.save(tmp_path)
+
+            # 使用Windows OCR（需要winrt）
+            from winrt.windows.media.ocr import OcrEngine
+            from winrt.windows.graphics.imaging import BitmapDecoder
+            from winrt.windows.storage import StorageFile
+            import asyncio
+
+            async def _do_ocr():
+                file = await StorageFile.get_file_from_path_async(tmp_path)
+                stream = await file.open_read_async()
+                decoder = await BitmapDecoder.create_async(stream)
+                bitmap = await decoder.get_software_bitmap_async()
+                engine = OcrEngine.try_create_from_user_profile_languages()
+                result = await engine.recognize_async(bitmap)
+                return result.text
+
+            text = asyncio.run(_do_ocr())
+            # 按行分割
+            return [line.strip() for line in text.split('\n') if line.strip()]
+        except Exception as e:
+            logger.error(f"Windows OCR失败: {e}")
+            return []
+
+    def _extract_nicknames_from_ocr(self, ocr_results):
+        """从OCR识别结果中提取QQ昵称模式"""
+        nicks = set()
+        # 合并所有识别文本
+        full_text = '\n'.join(ocr_results) if isinstance(ocr_results, list) else str(ocr_results)
+
+        # 模式1: [头衔]用户名 或 【头衔】用户名
+        for m in re.finditer(r'[\[【]([^\]】]+)[】\]]\s*([A-Za-z0-9_\u4e00-\u9fff]{2,30})', full_text):
+            nick = m.group(2).strip()
+            if len(nick) >= 2:
+                nicks.add(nick)
+
+        # 模式2: @用户名
+        for m in re.finditer(r'@([A-Za-z0-9_\u4e00-\u9fff]{2,30})', full_text):
+            nick = m.group(1).strip()
+            if len(nick) >= 2:
+                nicks.add(nick)
+
+        # 模式3: 行首的纯中文/英文用户名（2-15字符），后跟消息内容
+        # 这个模式比较宽松，需要人工确认
+        for line in ocr_results if isinstance(ocr_results, list) else full_text.split('\n'):
+            line = line.strip()
+            if not line:
+                continue
+            # 行首用户名：2-15字符的中英文，后跟逗号/冒号/空格+内容
+            m = re.match(r'^([A-Za-z0-9_\u4e00-\u9fff]{2,15})\s*[，,：:]\s*.+', line)
+            if m:
+                nick = m.group(1).strip()
+                # 过滤常见非昵称词
+                skip_words = {'你好', '请问', '怎么', '什么', '为什么', '多少', '在哪', '下载',
+                              '安装', '配置', '设置', '使用', '更新', '版本', '错误', '问题'}
+                if nick not in skip_words:
+                    nicks.add(nick)
+
+        return list(nicks)
+
     # ── 消息处理 ──
 
     def _on_new_message(self, platform: str, msg: str):