fix(ui): keep main window closable after a native dialog on Windows (#6319)

A native Windows MessageBox attached to a parent window disables that
window (WS_DISABLED) for its lifetime and re-enables it on dismissal.
When the parent is the main window — whose WindowClosing hook hides
instead of closes — the enable/hide sequence races and leaves the window
unable to process its close (X) button afterwards, so e.g. a rejected
login error dialog left the main window stuck open.

Route all native dialogs through src/lib/dialogs.ts, which forces
Detached: true on Windows (NULL owner, no window ever disabled) and is a
no-op on macOS/Linux (keeps the attached sheet-style presentation).

client/ui/frontend/src/contexts/ClientVersionContext.tsx

@@ -8,7 +8,8 @@ import {
     useState,
     type ReactNode,
 } from "react";
-import { Dialogs, Events } from "@wailsio/runtime";
+import { Events } from "@wailsio/runtime";
+import { errorDialog } from "@/lib/dialogs.ts";
 
 
 import { Update as UpdateSvc, WindowManager } from "@bindings/services";
@@ -66,7 +67,7 @@ export const ClientVersionProvider = ({ children }: { children: ReactNode }) =>
             })
             .catch((e) => {
                 if (cancelled || isDaemonUnavailable(e)) return;
-                void Dialogs.Error({
+                void errorDialog({
                     Title: i18next.t("update.error.loadStateTitle"),
                     Message: formatErrorMessage(e),
                 });
@@ -106,7 +107,7 @@ export const ClientVersionProvider = ({ children }: { children: ReactNode }) =>
                 // produce a result) and surface the error.
                 if (isDaemonUnavailable(e)) return;
                 WindowManager.CloseInstallProgress().catch(console.error);
-                await Dialogs.Error({
+                await errorDialog({
                     Title: i18next.t("update.error.triggerTitle"),
                     Message: formatErrorMessage(e),
                 });

client/ui/frontend/src/contexts/DebugBundleContext.tsx

@@ -5,7 +5,7 @@ import {
     useState,
     type ReactNode,
 } from "react";
-import { Dialogs } from "@wailsio/runtime";
+import { errorDialog } from "@/lib/dialogs.ts";
 import {
     Connection as ConnectionSvc,
     Debug as DebugSvc,
@@ -163,7 +163,7 @@ const useDebugBundle = () => {
                 return;
             }
             setStage({ kind: "idle" });
-            await Dialogs.Error({
+            await errorDialog({
                 Title: i18next.t("settings.error.debugBundleTitle"),
                 Message: formatErrorMessage(e),
             });

client/ui/frontend/src/contexts/ProfileContext.tsx

@@ -6,7 +6,8 @@ import {
     useState,
     type ReactNode,
 } from "react";
-import { Dialogs, Events } from "@wailsio/runtime";
+import { Events } from "@wailsio/runtime";
+import { errorDialog } from "@/lib/dialogs.ts";
 import {
     Connection,
     ProfileSwitcher,
@@ -65,7 +66,7 @@ export const ProfileProvider = ({ children }: { children: ReactNode }) => {
             if (msg.includes("code = Unavailable")) {
                 return;
             }
-            await Dialogs.Error({
+            await errorDialog({
                 Title: i18next.t("profile.error.loadTitle"),
                 Message: formatErrorMessage(e),
             });

client/ui/frontend/src/contexts/SettingsContext.tsx

@@ -7,7 +7,7 @@ import {
     useState,
     type ReactNode,
 } from "react";
-import { Dialogs } from "@wailsio/runtime";
+import { errorDialog } from "@/lib/dialogs.ts";
 import { Autostart, Settings as SettingsSvc } from "@bindings/services";
 import type { Config } from "@bindings/services/models.js";
 import i18next from "@/lib/i18n";
@@ -68,7 +68,7 @@ const useSettingsState = () => {
                 });
                 setConfig(c);
             } catch (e) {
-                await Dialogs.Error({
+                await errorDialog({
                     Title: i18next.t("settings.error.loadTitle"),
                     Message: errorMessage(e),
                 });
@@ -98,7 +98,7 @@ const useSettingsState = () => {
                     username,
                 });
             } catch (e) {
-                await Dialogs.Error({
+                await errorDialog({
                     Title: i18next.t("settings.error.saveTitle"),
                     Message: errorMessage(e),
                 });
@@ -211,7 +211,7 @@ export const AutostartSettingsProvider = ({ children }: { children: ReactNode })
             await Autostart.SetEnabled(enabled);
         } catch (e) {
             setAutostart((s) => (s ? { ...s, enabled: !enabled } : s));
-            await Dialogs.Error({
+            await errorDialog({
                 Title: i18next.t("settings.general.autostart.errorTitle"),
                 Message: errorMessage(e),
             });