fix: create child windows hidden, show after tauri://created

Per Gemini's analysis: WKWebView may reap windows that fail to
establish focus during creation. All WebviewWindow instances now
created with visible: false + focus: true, then wv.show() is
called only after tauri://created confirms the webview is ready.

This prevents the OS window manager from treating the window as
an orphaned popup during the brief initialization period.

Applied to: tool windows, help windows, editor windows, detached
session windows.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/components/session/TabBar.vue

@@ -141,8 +141,11 @@ async function detachTab(): Promise<void> {
     height: 600,
     resizable: true,
     center: true,
+    visible: false,
+    focus: true,
     url: `index.html#/detached-session?sessionId=${session.id}&name=${encodeURIComponent(session.name)}&protocol=${session.protocol}`,
   });
+  wv.once("tauri://created", () => { wv.show(); });
   wv.once("tauri://error", (e) => { console.error("Detach window error:", e); });
 }
 

src/layouts/MainLayout.vue

@@ -375,8 +375,11 @@ async function handleHelpAction(page: string): Promise<void> {
     height: 600,
     resizable: true,
     center: true,
+    visible: false,
+    focus: true,
     url: `index.html#/tool/help?page=${page}`,
   });
+  wv.once("tauri://created", () => { wv.show(); });
   wv.once("tauri://error", (e) => { console.error("Help window error:", e); alert("Window error: " + JSON.stringify(e.payload)); });
 }
 
@@ -413,7 +416,7 @@ async function handleToolAction(tool: string): Promise<void> {
 
   const sessionId = activeSessionId.value || "";
 
-  // Open tool in a new Tauri window
+  // Open tool in a new Tauri window — create hidden, show after webview confirms ready
   const label = `tool-${tool}-${Date.now()}`;
   const wv = new WebviewWindow(label, {
     title: `Wraith — ${config.title}`,
@@ -421,8 +424,11 @@ async function handleToolAction(tool: string): Promise<void> {
     height: config.height,
     resizable: true,
     center: true,
+    visible: false,
+    focus: true,
     url: `index.html#/tool/${tool}?sessionId=${sessionId}`,
   });
+  wv.once("tauri://created", () => { wv.show(); });
   wv.once("tauri://error", (e) => { console.error("Tool window error:", e); alert("Window error: " + JSON.stringify(e.payload)); });
 }
 
@@ -454,8 +460,11 @@ async function handleOpenFile(entry: FileEntry): Promise<void> {
       height: 600,
       resizable: true,
       center: true,
+      visible: false,
+      focus: true,
       url: `index.html#/tool/editor?sessionId=${sessionId}&path=${encodeURIComponent(entry.path)}`,
     });
+    wv.once("tauri://created", () => { wv.show(); });
     wv.once("tauri://error", (e) => { console.error("Editor window error:", e); alert("Window error: " + JSON.stringify(e.payload)); });
   } catch (err) { console.error("Failed to open editor:", err); }
 }