feat(factory): 内容工厂与链接处理

- 第三栏内容工厂：按拖入类型展示动作，动作按钮本身可接收 drop
- 链接分类：http(s) 按扩展名判定图片/音视频/文档/压缩包/网页
- http 链接动作：打开、下载、另存为、复制、Markdown、复制文件名、待办、问小埃
- 非标准 scheme：尝试打开、复制；thunder 解析 base64 真实地址，magnet 解析 dn
- 文字动作：ICU 分词、正则提取链接、朗读（spd-say）、复制、待办
- 文件/图片动作：打开、提取文字（占位）、生成描述、保存图片、复制路径、待办
- Downloader：异步下载到 XDG 下载目录 / 另存为，面板 toast 提示
- TodoModel：持久化到 todo.json，供「添加到待办」使用
- 无头自测 gxde-ai-see-selftest：链接分类/分词/提取链接/动作匹配
- 合成器 portal 自测脚本 tests/portal（虚拟指针 + GTK 源/目标）

tests/portal/virtual-pointer-protocol.c

@@ -0,0 +1,87 @@
+/* Generated by wayland-scanner 1.23.1 */
+
+/*
+ * Copyright © 2019 Josef Gajdusek
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+#include <stdbool.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include "wayland-util.h"
+
+#ifndef __has_attribute
+# define __has_attribute(x) 0  /* Compatibility with non-clang compilers. */
+#endif
+
+#if (__has_attribute(visibility) || defined(__GNUC__) && __GNUC__ >= 4)
+#define WL_PRIVATE __attribute__ ((visibility("hidden")))
+#else
+#define WL_PRIVATE
+#endif
+
+extern const struct wl_interface wl_output_interface;
+extern const struct wl_interface wl_seat_interface;
+extern const struct wl_interface zwlr_virtual_pointer_v1_interface;
+
+static const struct wl_interface *wlr_virtual_pointer_unstable_v1_types[] = {
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	&wl_seat_interface,
+	&zwlr_virtual_pointer_v1_interface,
+	&wl_seat_interface,
+	&wl_output_interface,
+	&zwlr_virtual_pointer_v1_interface,
+};
+
+static const struct wl_message zwlr_virtual_pointer_v1_requests[] = {
+	{ "motion", "uff", wlr_virtual_pointer_unstable_v1_types + 0 },
+	{ "motion_absolute", "uuuuu", wlr_virtual_pointer_unstable_v1_types + 0 },
+	{ "button", "uuu", wlr_virtual_pointer_unstable_v1_types + 0 },
+	{ "axis", "uuf", wlr_virtual_pointer_unstable_v1_types + 0 },
+	{ "frame", "", wlr_virtual_pointer_unstable_v1_types + 0 },
+	{ "axis_source", "u", wlr_virtual_pointer_unstable_v1_types + 0 },
+	{ "axis_stop", "uu", wlr_virtual_pointer_unstable_v1_types + 0 },
+	{ "axis_discrete", "uufi", wlr_virtual_pointer_unstable_v1_types + 0 },
+	{ "destroy", "", wlr_virtual_pointer_unstable_v1_types + 0 },
+};
+
+WL_PRIVATE const struct wl_interface zwlr_virtual_pointer_v1_interface = {
+	"zwlr_virtual_pointer_v1", 2,
+	9, zwlr_virtual_pointer_v1_requests,
+	0, NULL,
+};
+
+static const struct wl_message zwlr_virtual_pointer_manager_v1_requests[] = {
+	{ "create_virtual_pointer", "?on", wlr_virtual_pointer_unstable_v1_types + 5 },
+	{ "destroy", "", wlr_virtual_pointer_unstable_v1_types + 0 },
+	{ "create_virtual_pointer_with_output", "2?o?on", wlr_virtual_pointer_unstable_v1_types + 7 },
+};
+
+WL_PRIVATE const struct wl_interface zwlr_virtual_pointer_manager_v1_interface = {
+	"zwlr_virtual_pointer_manager_v1", 2,
+	3, zwlr_virtual_pointer_manager_v1_requests,
+	0, NULL,
+};
+