fix(linux): prevent startup panic from unrealized capsule GDK window | fix(linux): 修复胶囊窗口因 GDK 未实例化导致的启动崩溃 (#792)

* fix(linux): prevent startup panic from unrealized capsule GDK window | fix(linux): 修复胶囊窗口因 GDK 未实例化导致的启动崩溃

On Linux X11, when the capsule window is created with `visible: false` +
`transparent: true` in tauri.conf.json, its underlying GDK window is never
realized. The subsequent call to `capsule.set_ignore_cursor_events(true)`
triggers a panic inside tao's Linux event loop (event_loop.rs:457) because
`window.window().unwrap()` returns `None` for an unrealized GDK window.

The fix follows the same approach as voicebox PR#837 (PhamBit):
force GDK window realization before calling set_ignore_cursor_events, by
first moving the window off-screen and calling show(). The window is then
repositioned correctly by the existing position_capsule_bottom_center()
call and hidden as normal.

Refs:
  - jamiepine/voicebox#837
  - tauri-apps/tao#635

在 Linux X11 上，tauri.conf.json 中定义的 capsule 窗口设置了
visible: false + transparent: true，导致其底层 GDK 窗口从未被实例化。
随后调用 capsule.set_ignore_cursor_events(true) 时，tao 的 Linux 事件循环
(event_loop.rs:457) 因 window.window().unwrap() 返回 None 而 panic 崩溃。

修复方法参考 voicebox PR#837：在设置鼠标穿透前先将窗口移出屏幕并
调用 show() 强制 GDK 实例化，后续由原有的 position_capsule_bottom_center()
重新定位并隐藏。

* fix(linux): realize hidden capsule without showing it

---------

Co-authored-by: Chris233 <h-chris233@outlook.com>

Author: yuanchenglu

openless-all/app/src-tauri/Cargo.lock

@@ -90,6 +90,7 @@ features = ["windows-native"]
 
 [target.'cfg(target_os = "linux")'.dependencies]
 dbus = "0.9"
+gtk = "0.18"
 [target.'cfg(all(unix, not(target_os = "macos"), not(target_os = "android")))'.dependencies.keyring]
 version = "3.6.3"
 default-features = false

openless-all/app/src-tauri/Cargo.toml

@@ -95,6 +95,9 @@ use std::sync::mpsc;
 use std::sync::Arc;
 use std::time::Duration;
 
+#[cfg(target_os = "linux")]
+use gtk::prelude::WidgetExt;
+
 const LOG_ROTATE_LIMIT_BYTES: u64 = 10 * 1024 * 1024;
 #[cfg(target_os = "macos")]
 const OPENLESS_BUNDLE_ID: &str = "com.openless.app";
@@ -520,8 +523,27 @@ fn run_desktop() {
                 }
                 // 纯光效舞台没有任何可点元素（✕/✓ 按钮已移除），而窗口放大到 460×180
                 // 盖住屏幕底部中央 —— 必须鼠标穿透，否则会挡住底下应用的点击。
-                if let Err(e) = capsule.set_ignore_cursor_events(true) {
-                    log::warn!("[capsule] set_ignore_cursor_events failed: {e}");
+                // Linux 下 tao 的鼠标穿透实现会直接解包底层 GDK 窗口；visible=false 时
+                // 窗口尚未 realize。这里只创建窗口系统资源而不 map，避免 X11 崩溃，
+                // 也不会像 show() 那样在不支持窗口定位的 Wayland 上造成启动闪窗。
+                #[cfg(target_os = "linux")]
+                let cursor_passthrough_ready = match capsule.gtk_window() {
+                    Ok(gtk_window) => {
+                        gtk_window.realize();
+                        true
+                    }
+                    Err(e) => {
+                        log::warn!("[capsule] gtk_window failed; skipping cursor passthrough: {e}");
+                        false
+                    }
+                };
+                #[cfg(not(target_os = "linux"))]
+                let cursor_passthrough_ready = true;
+
+                if cursor_passthrough_ready {
+                    if let Err(e) = capsule.set_ignore_cursor_events(true) {
+                        log::warn!("[capsule] set_ignore_cursor_events failed: {e}");
+                    }
                 }
                 if let Err(e) = position_capsule_bottom_center(&capsule, false) {
                     log::warn!("[capsule] position failed: {e}");