fix(decky): recreate the library shortcut when its cached appId is stale

The visible "Punktfunk" shortcut's Steam appId is cached in SteamUI
localStorage, which lives in Steam's CEF profile — so it survives a
plugin uninstall/reinstall. Deleting the shortcut left the key dangling;
on the next mount ensure*Shortcut recalled the dead appId, took the reuse
branch, and ran SetShortcut* against a non-existent id (silent no-ops).
AddShortcut was never reached, so the entry never came back. The same
stale-reuse also made the hidden stream shortcut RunGame a dead gameid.

Verify the remembered appId still maps to a live shortcut via
appStore.GetAppOverviewByAppID before reusing it; a confident miss falls
through to AddShortcut. When appStore is unavailable, assume it exists so
a false negative can't spawn a duplicate library entry.

Also add a "Recreate library shortcut" recovery button to the QAM About
section (recreateShortcuts): drops any dead cached keys and re-ensures.
Covers deleting the shortcut without reinstalling, where no mount fires
the self-heal.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

clients/decky/src/index.tsx

@@ -10,9 +10,17 @@ import {
   showModal,
   staticClasses,
 } from "@decky/ui";
-import { definePlugin, routerHook } from "@decky/api";
+import { definePlugin, routerHook, toaster } from "@decky/api";
 import { FC } from "react";
-import { FaDownload, FaLock, FaLockOpen, FaPlay, FaSyncAlt, FaTv } from "react-icons/fa";
+import {
+  FaDownload,
+  FaLock,
+  FaLockOpen,
+  FaPlay,
+  FaPlus,
+  FaSyncAlt,
+  FaTv,
+} from "react-icons/fa";
 import { PluginErrorBoundary } from "./boundary";
 import {
   applyUpdate,
@@ -31,7 +39,19 @@ import {
 import { streamPin } from "./library";
 import { PunktfunkRoute, ROUTE } from "./page";
 import { PairModal } from "./pair";
-import { ensureGamepadUiShortcut } from "./steam";
+import { ensureGamepadUiShortcut, recreateShortcuts } from "./steam";
+
+// Recovery action for "the Punktfunk library entry vanished" — recreates the visible shortcut.
+// Deleting the shortcut (optionally + reinstalling the plugin) leaves a stale appId in Steam's
+// CEF localStorage that self-heal fixes on the next mount, but this gives an in-session button
+// that works even without a reload. Always ends in a toast so the tap has feedback.
+async function recreatePunktfunkShortcut(): Promise<void> {
+  const appId = await recreateShortcuts();
+  toaster.toast({
+    title: "Punktfunk",
+    body: appId != null ? "Shortcut restored to your library" : "Couldn't create the shortcut",
+  });
+}
 
 // ----------------------------------------------------------------------------------------
 // QAM panel — quick status + entry into the full page + one-tap stream for known hosts
@@ -190,6 +210,16 @@ const QamPanel: FC = () => {
             {checking ? "Checking…" : "Check for updates"}
           </ButtonItem>
         </PanelSectionRow>
+        <PanelSectionRow>
+          <ButtonItem
+            layout="below"
+            description="Missing the Punktfunk entry in your library? This puts it back."
+            onClick={() => void recreatePunktfunkShortcut()}
+          >
+            <FaPlus style={{ marginRight: "0.5em" }} />
+            Recreate library shortcut
+          </ButtonItem>
+        </PanelSectionRow>
       </PanelSection>
     </>
   );