feat: 添加依赖自动检测与安装、选项记忆、KDocs登录优化

- 新增依赖检测模块：启动时自动检测wkhtmltoimage和Playwright Chromium
- 新增依赖安装对话框：缺失时提示用户一键下载安装
- 修复选项记忆功能：浏览类型、自动截图、自动上传选项现在会保存
- 优化KDocs登录检测：未登录时自动切换到金山文档页面并显示二维码
- 简化日志输出：移除debug信息，保留用户友好的状态提示
- 新增账号变化信号：账号管理页面的修改会自动同步到浏览任务页面

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

core/api_browser.py

@@ -107,10 +107,10 @@ class APIBrowser:
             except Exception as e:
                 last_error = e
                 if attempt < max_retries:
-                    self.log(f"[API] 请求超时，{retry_delay}秒后重试 ({attempt}/{max_retries})...")
+                    self.log(f" 请求超时，{retry_delay}秒后重试 ({attempt}/{max_retries})...")
                     time.sleep(retry_delay)
                 else:
-                    self.log(f"[API] 请求失败，已重试{max_retries}次: {str(e)}")
+                    self.log(f" 请求失败，已重试{max_retries}次: {str(e)}")
 
         raise last_error
 
@@ -125,7 +125,7 @@ class APIBrowser:
 
     def login(self, username: str, password: str) -> bool:
         """登录"""
-        self.log(f"[API] 登录: {username}")
+        self.log(f" 登录: {username}")
         self._username = username
 
         try:
@@ -152,17 +152,17 @@ class APIBrowser:
 
             if self.index_url_pattern in resp.url:
                 self.logged_in = True
-                self.log(f"[API] 登录成功")
+                self.log(f" 登录成功")
                 return True
             else:
                 soup = BeautifulSoup(resp.text, "html.parser")
                 error = soup.find(id="lblMsg")
                 error_msg = error.get_text().strip() if error else "未知错误"
-                self.log(f"[API] 登录失败: {error_msg}")
+                self.log(f" 登录失败: {error_msg}")
                 return False
 
         except Exception as e:
-            self.log(f"[API] 登录异常: {str(e)}")
+            self.log(f" 登录异常: {str(e)}")
             return False
 
     def get_real_name(self) -> Optional[str]:
@@ -217,10 +217,10 @@ class APIBrowser:
             with open(cookies_path, "w", encoding="utf-8") as f:
                 f.write("\n".join(lines) + "\n")
 
-            self.log(f"[API] Cookies已保存供截图使用")
+            self.log(f" Cookies已保存供截图使用")
             return True
         except Exception as e:
-            self.log(f"[API] 保存cookies失败: {e}")
+            self.log(f" 保存cookies失败: {e}")
             return False
 
     def get_article_list_page(self, bz: int = 0, page: int = 1) -> tuple:
@@ -377,7 +377,7 @@ class APIBrowser:
         # 根据浏览类型确定bz参数（网站更新后 bz=0 为应读）
         bz = 0
 
-        self.log(f"[API] 开始浏览 '{browse_type}' (bz={bz})...")
+        self.log(f" 开始浏览 '{browse_type}' (bz={bz})...")
 
         try:
             total_items = 0
@@ -387,12 +387,12 @@ class APIBrowser:
             articles, total_pages, _ = self.get_article_list_page(bz, 1)
 
             if not articles:
-                self.log(f"[API] '{browse_type}' 没有待处理内容")
+                self.log(f" '{browse_type}' 没有待处理内容")
                 result.success = True
                 return result
 
             total_records = self.last_total_records
-            self.log(f"[API] 共 {total_records} 条记录，开始处理...")
+            self.log(f" 共 {total_records} 条记录，开始处理...")
 
             # 上报初始进度
             if progress_callback:
@@ -404,7 +404,7 @@ class APIBrowser:
 
             for iteration in range(max_iterations):
                 if should_stop_callback and should_stop_callback():
-                    self.log("[API] 收到停止信号")
+                    self.log(" 收到停止信号")
                     break
 
                 if not articles:
@@ -428,7 +428,7 @@ class APIBrowser:
                     try:
                         attachments, article_info = self.get_article_attachments(article_href)
                     except Exception as e:
-                        self.log(f"[API] 获取文章失败: {title} | {str(e)}")
+                        self.log(f" 获取文章失败: {title} | {str(e)}")
                         continue
 
                     total_items += 1
@@ -446,10 +446,10 @@ class APIBrowser:
                         for attach in attachments:
                             if self.mark_attachment_read(attach["id"], attach["channel_id"]):
                                 total_attachments += 1
-                        self.log(f"[API] [{total_items}] {title} - {len(attachments)}个附件")
+                        self.log(f" [{total_items}] {title} - {len(attachments)}个附件")
                     else:
                         status = "已标记" if article_marked else "标记失败"
-                        self.log(f"[API] [{total_items}] {title} - 无附件({status})")
+                        self.log(f" [{total_items}] {title} - 无附件({status})")
 
                     # 上报进度
                     if progress_callback:
@@ -472,10 +472,10 @@ class APIBrowser:
                     if new_total_pages > 0:
                         total_pages = new_total_pages
                 except Exception as e:
-                    self.log(f"[API] 获取第{current_page}页列表失败: {str(e)}")
+                    self.log(f" 获取第{current_page}页列表失败: {str(e)}")
                     break
 
-            self.log(f"[API] 浏览完成: {total_items} 条内容，{total_attachments} 个附件")
+            self.log(f" 浏览完成: {total_items} 条内容，{total_attachments} 个附件")
             result.success = True
             result.total_items = total_items
             result.total_attachments = total_attachments
@@ -483,7 +483,7 @@ class APIBrowser:
 
         except Exception as e:
             result.error_message = str(e)
-            self.log(f"[API] 浏览出错: {str(e)}")
+            self.log(f" 浏览出错: {str(e)}")
             return result
 
     def close(self):