Build overlay frontend: tabs, search, param forms, copy-to-clipboard

Quick Cheats, full command DB with category/source filters, item/perk/
buff/skill databases with fill-in parameters and per-flavor command
variants, settings tab with hotkey recorder, opacity, flavor, autostart.
Dark HUD theme on a transparent frameless window.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/lib/tauri.ts

@@ -0,0 +1,67 @@
+// Thin wrappers around Tauri APIs with browser fallbacks, so `npm run dev`
+// in a plain browser stays usable for UI work.
+
+export const inTauri = typeof window !== "undefined" && "__TAURI_INTERNALS__" in window;
+
+export async function copyText(text: string): Promise<void> {
+  if (inTauri) {
+    const { writeText } = await import("@tauri-apps/plugin-clipboard-manager");
+    await writeText(text);
+  } else {
+    await navigator.clipboard.writeText(text);
+  }
+}
+
+export async function hideWindow(): Promise<void> {
+  if (!inTauri) return;
+  const { invoke } = await import("@tauri-apps/api/core");
+  await invoke("hide_window");
+}
+
+export async function getHotkey(): Promise<string> {
+  if (!inTauri) return "ctrl+shift+k";
+  const { invoke } = await import("@tauri-apps/api/core");
+  return invoke<string>("get_hotkey");
+}
+
+export async function setHotkey(hotkey: string): Promise<void> {
+  if (!inTauri) return;
+  const { invoke } = await import("@tauri-apps/api/core");
+  await invoke("set_hotkey", { hotkey });
+}
+
+type StoreValue = string | number | boolean;
+
+export async function storeGet<T extends StoreValue>(key: string): Promise<T | undefined> {
+  if (inTauri) {
+    const { load } = await import("@tauri-apps/plugin-store");
+    const store = await load("settings.json");
+    return (await store.get<T>(key)) ?? undefined;
+  }
+  const raw = localStorage.getItem(key);
+  return raw === null ? undefined : (JSON.parse(raw) as T);
+}
+
+export async function storeSet(key: string, value: StoreValue): Promise<void> {
+  if (inTauri) {
+    const { load } = await import("@tauri-apps/plugin-store");
+    const store = await load("settings.json");
+    await store.set(key, value);
+    await store.save();
+  } else {
+    localStorage.setItem(key, JSON.stringify(value));
+  }
+}
+
+export async function getAutostart(): Promise<boolean> {
+  if (!inTauri) return false;
+  const { isEnabled } = await import("@tauri-apps/plugin-autostart");
+  return isEnabled();
+}
+
+export async function setAutostart(enabled: boolean): Promise<void> {
+  if (!inTauri) return;
+  const { enable, disable } = await import("@tauri-apps/plugin-autostart");
+  if (enabled) await enable();
+  else await disable();
+}