Add ModeTemplate with Svelte 5 frontend and components

- Create reusable components: auth, api-client, shared-types
- ModeTemplate with Hono backend and SvelteKit frontend
- Auth store refactored to class-based Svelte 5 pattern
- SSR-safe hydrate() pattern for localStorage access
- Frontend builds successfully with Svelte 5 runes

ModeTemplate/frontend/.svelte-kit/non-ambient.d.ts

@@ -0,0 +1,42 @@
+
+// this file is generated — do not edit it
+
+
+declare module "svelte/elements" {
+	export interface HTMLAttributes<T> {
+		'data-sveltekit-keepfocus'?: true | '' | 'off' | undefined | null;
+		'data-sveltekit-noscroll'?: true | '' | 'off' | undefined | null;
+		'data-sveltekit-preload-code'?:
+			| true
+			| ''
+			| 'eager'
+			| 'viewport'
+			| 'hover'
+			| 'tap'
+			| 'off'
+			| undefined
+			| null;
+		'data-sveltekit-preload-data'?: true | '' | 'hover' | 'tap' | 'off' | undefined | null;
+		'data-sveltekit-reload'?: true | '' | 'off' | undefined | null;
+		'data-sveltekit-replacestate'?: true | '' | 'off' | undefined | null;
+	}
+}
+
+export {};
+
+
+declare module "$app/types" {
+	export interface AppTypes {
+		RouteId(): "/" | "/callback";
+		RouteParams(): {
+			
+		};
+		LayoutParams(): {
+			"/": Record<string, never>;
+			"/callback": Record<string, never>
+		};
+		Pathname(): "/" | "/callback" | "/callback/";
+		ResolvedPathname(): `${"" | `/${string}`}${ReturnType<AppTypes['Pathname']>}`;
+		Asset(): "/.gitkeep" | string & {};
+	}
+}