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/generated/client-optimized/app.js

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+export { matchers } from './matchers.js';
+
+export const nodes = [
+	() => import('./nodes/0'),
+	() => import('./nodes/1'),
+	() => import('./nodes/2'),
+	() => import('./nodes/3')
+];
+
+export const server_loads = [];
+
+export const dictionary = {
+		"/": [2],
+		"/callback": [3]
+	};
+
+export const hooks = {
+	handleError: (({ error }) => { console.error(error) }),
+	
+	reroute: (() => {}),
+	transport: {}
+};
+
+export const decoders = Object.fromEntries(Object.entries(hooks.transport).map(([k, v]) => [k, v.decode]));
+export const encoders = Object.fromEntries(Object.entries(hooks.transport).map(([k, v]) => [k, v.encode]));
+
+export const hash = false;
+
+export const decode = (type, value) => decoders[type](value);
+
+export { default as root } from '../root.js';

ModeTemplate/frontend/.svelte-kit/generated/client-optimized/matchers.js

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+export const matchers = {};

ModeTemplate/frontend/.svelte-kit/generated/client-optimized/nodes/0.js

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+export { default as component } from "../../../../src/routes/+layout.svelte";

ModeTemplate/frontend/.svelte-kit/generated/client-optimized/nodes/1.js

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+export { default as component } from "../../../../node_modules/@sveltejs/kit/src/runtime/components/svelte-5/error.svelte";

ModeTemplate/frontend/.svelte-kit/generated/client-optimized/nodes/2.js

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+export { default as component } from "../../../../src/routes/+page.svelte";

ModeTemplate/frontend/.svelte-kit/generated/client-optimized/nodes/3.js

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+export { default as component } from "../../../../src/routes/callback/+page.svelte";