refactor: only include template in share url if it's custom

src/lib/components/Header.svelte

@@ -1,13 +1,26 @@
 <script lang="ts">
-	import { Sun, Moon } from 'lucide-svelte';
+	import { Sun, Moon, Share2, Check } from 'lucide-svelte';
 	import { theme } from '$lib/theme.svelte';
 	import { roster } from '$lib/state.svelte';
 	import { presets } from '$lib/presets';
+	import { encodeCharacterURL } from '$lib/sharing';
 	import CharacterSwitcher from './CharacterSwitcher.svelte';
 
+	let copied = $state(false);
+
 	async function createCharacter() {
 		await roster.create(presets[0]);
 	}
+
+	async function share() {
+		const char = roster.active;
+		if (!char) return;
+		const encoded = encodeCharacterURL(char);
+		const url = `${window.location.origin}${window.location.pathname}#${encoded}`;
+		await navigator.clipboard.writeText(url);
+		copied = true;
+		setTimeout(() => { copied = false; }, 2000);
+	}
 </script>
 
 <header class="sticky top-0 z-20 flex items-center gap-3 px-4 py-3 border-b" style="border-color: var(--border); background: var(--bg-card);">
@@ -22,6 +35,16 @@
 			{#if roster.saveStatus === 'saving'}Saving...{:else if roster.saveStatus === 'saved'}Saved{/if}
 		</span>
 
+		{#if roster.active}
+			<button onclick={share} class="p-1 rounded hover:opacity-80" title="Copy share link">
+				{#if copied}
+					<Check size={18} />
+				{:else}
+					<Share2 size={18} />
+				{/if}
+			</button>
+		{/if}
+
 		<button
 			onclick={createCharacter}
 			class="px-3 py-1 rounded text-sm border hover:opacity-80"

src/lib/components/ImportModal.svelte

@@ -0,0 +1,126 @@
+<script lang="ts">
+	import { decodeCharacterURL, decodeTemplateURL } from '$lib/sharing';
+	import { generateRecord } from '$lib/output';
+	import { species } from '$lib/data';
+	import { roster } from '$lib/state.svelte';
+	import { slugify } from '$lib/utils/slugify';
+	import OutputTab from './OutputTab.svelte';
+
+	let { encoded, onClose }: { encoded: string; onClose: () => void } = $props();
+
+	let error = $state('');
+	let type = $state<'character' | 'template' | null>(null);
+	let charData = $state<{ template: any; data: Record<string, unknown> } | null>(null);
+	let tmplData = $state<any>(null);
+
+	let activeTab = $state('');
+
+	$effect(() => {
+		try {
+			if (encoded.startsWith('c1.')) {
+				type = 'character';
+				charData = decodeCharacterURL(encoded);
+			} else if (encoded.startsWith('t1.')) {
+				type = 'template';
+				tmplData = decodeTemplateURL(encoded);
+			} else {
+				error = 'Unrecognized share link format.';
+			}
+		} catch {
+			error = 'Failed to decode share link.';
+		}
+	});
+
+	let tabs = $derived(
+		charData?.template.records.filter((r: any) => r.type !== 'public') ?? []
+	);
+
+	$effect(() => {
+		if (tabs.length && !tabs.some((t: any) => t.type === activeTab)) {
+			activeTab = tabs[0].type;
+		}
+	});
+
+	let output = $derived(
+		charData && activeTab
+			? generateRecord(charData.template, charData.data, activeTab, species)
+			: ''
+	);
+
+	function charName(): string {
+		if (!charData) return 'Unknown';
+		return (charData.data[slugify('Name')] as string) || 'Unnamed Character';
+	}
+
+	async function importCharacter() {
+		if (!charData) return;
+		const char = await roster.create(charData.template);
+		Object.assign(char.data, charData.data);
+		roster.scheduleSave(char);
+		onClose();
+	}
+
+	async function importTemplate() {
+		if (!tmplData) return;
+		await roster.create(tmplData);
+		onClose();
+	}
+</script>
+
+<div class="min-h-screen flex flex-col items-center p-4">
+	<div class="w-full max-w-2xl">
+		{#if error}
+			<div class="rounded border p-6 text-center" style="border-color: var(--border); background: var(--bg-card);">
+				<p class="mb-4">{error}</p>
+				<button onclick={onClose} class="px-3 py-1 rounded text-sm border hover:opacity-80" style="border-color: var(--border);">
+					Dismiss
+				</button>
+			</div>
+		{:else if type === 'character' && charData}
+			<div class="flex items-center justify-between mb-4">
+				<div>
+					<h2 class="font-semibold">{charName()}</h2>
+					<p class="text-sm" style="color: var(--text-muted);">Shared character — {charData.template.name} template</p>
+				</div>
+				<div class="flex gap-2">
+					<button onclick={onClose} class="px-3 py-1 rounded text-sm border hover:opacity-80" style="border-color: var(--border);">
+						Cancel
+					</button>
+					<button onclick={importCharacter} class="px-3 py-1 rounded text-sm border hover:opacity-80" style="border-color: var(--border);">
+						Import
+					</button>
+				</div>
+			</div>
+
+			<div class="rounded border" style="border-color: var(--border); background: var(--bg-card);">
+				<div class="flex border-b" style="border-color: var(--border);">
+					{#each tabs as tab}
+						<button
+							onclick={() => { activeTab = tab.type; }}
+							class="px-4 py-2 text-sm capitalize"
+							style={activeTab === tab.type
+								? `color: var(--accent); border-bottom: 2px solid var(--accent);`
+								: `color: var(--text-muted); border-bottom: 2px solid transparent;`}
+						>
+							{tab.type}
+						</button>
+					{/each}
+				</div>
+				<OutputTab {output} />
+			</div>
+		{:else if type === 'template' && tmplData}
+			<div class="rounded border p-6 text-center" style="border-color: var(--border); background: var(--bg-card);">
+				<h2 class="font-semibold mb-2">Shared Template: {tmplData.name}</h2>
+				<p class="text-sm mb-4" style="color: var(--text-muted);">{tmplData.records.length} records, {tmplData.records.reduce((n: number, r: any) => n + r.fields.length, 0)} fields</p>
+				<div class="flex gap-2 justify-center">
+					<button onclick={onClose} class="px-3 py-1 rounded text-sm border hover:opacity-80" style="border-color: var(--border);">
+						Cancel
+					</button>
+					<button onclick={importTemplate} class="px-3 py-1 rounded text-sm border hover:opacity-80" style="border-color: var(--border);">
+						Create Character
+					</button>
+				</div>
+			</div>
+		{/if}
+	</div>
+</div>

src/lib/components/Modal.svelte

@@ -0,0 +1,25 @@
+<script lang="ts">
+	let { onClose, children }: { onClose: () => void; children: any } = $props();
+
+	function handleKeydown(e: KeyboardEvent) {
+		if (e.key === 'Escape') onClose();
+	}
+</script>
+
+<svelte:window onkeydown={handleKeydown} />
+
+<!-- svelte-ignore a11y_no_static_element_interactions -->
+<div
+	class="fixed inset-0 z-50 flex items-center justify-center"
+	onmousedown={onClose}
+>
+	<div class="absolute inset-0 bg-black/50"></div>
+	<!-- svelte-ignore a11y_no_static_element_interactions -->
+	<div
+		class="relative rounded-lg shadow-xl max-w-md w-full mx-4 p-6"
+		style="background: var(--bg-card); color: var(--text);"
+		onmousedown={(e) => e.stopPropagation()}
+	>
+		{@render children()}
+	</div>
+</div>

src/lib/sharing.test.ts

@@ -5,12 +5,25 @@ import {
 	encodeTemplateURL,
 	decodeTemplateURL
 } from './sharing';
+import { presets } from './presets';
 import type { Character, Template } from './types';
 
-const testTemplate: Template = {
-	id: 'preset:standard',
-	name: 'Standard',
-	description: 'The standard record format.',
+const standardPreset = presets.find((p) => p.id === 'preset:standard')!;
+
+const testCharacter: Character = {
+	id: 'abc-123',
+	template: standardPreset,
+	data: {
+		name: 'Yury Zakharov',
+		species: 'human',
+		'employment-history': 'Shaft Miner'
+	}
+};
+
+const customTemplate: Template = {
+	id: 'custom:test',
+	name: 'Custom',
+	description: 'A custom template.',
 	schemaVersion: 1,
 	records: [
 		{
@@ -23,35 +36,34 @@ const testTemplate: Template = {
 	]
 };
 
-const testCharacter: Character = {
-	id: 'abc-123',
-	template: testTemplate,
-	data: {
-		name: 'Yury Zakharov',
-		species: 'human',
-		'employment-history': 'Shaft Miner'
-	}
-};
-
 describe('character URL encoding', () => {
-	it('round-trips character data', () => {
+	it('round-trips preset character data', () => {
 		const encoded = encodeCharacterURL(testCharacter);
 		const decoded = decodeCharacterURL(encoded);
 		expect(decoded.data).toEqual(testCharacter.data);
 		expect(decoded.template.name).toBe('Standard');
 	});
 
+	it('uses short encoding for preset templates', () => {
+		const encoded = encodeCharacterURL(testCharacter);
+		const customChar = { ...testCharacter, template: customTemplate };
+		const customEncoded = encodeCharacterURL(customChar);
+		expect(encoded.length).toBeLessThan(customEncoded.length);
+	});
+
+	it('round-trips custom template character', () => {
+		const char: Character = { ...testCharacter, template: customTemplate };
+		const encoded = encodeCharacterURL(char);
+		const decoded = decodeCharacterURL(encoded);
+		expect(decoded.data).toEqual(testCharacter.data);
+		expect(decoded.template.name).toBe('Custom');
+	});
+
 	it('starts with c1. prefix', () => {
 		const encoded = encodeCharacterURL(testCharacter);
 		expect(encoded.startsWith('c1.')).toBe(true);
 	});
 
-	it('strips id', () => {
-		const encoded = encodeCharacterURL(testCharacter);
-		const decoded = decodeCharacterURL(encoded);
-		expect(decoded).not.toHaveProperty('id');
-	});
-
 	it('prunes empty values from data', () => {
 		const char: Character = {
 			...testCharacter,
@@ -65,19 +77,19 @@ describe('character URL encoding', () => {
 
 describe('template URL encoding', () => {
 	it('round-trips template structure', () => {
-		const encoded = encodeTemplateURL(testTemplate);
+		const encoded = encodeTemplateURL(customTemplate);
 		const decoded = decodeTemplateURL(encoded);
-		expect(decoded.name).toBe('Standard');
-		expect(decoded.records).toEqual(testTemplate.records);
+		expect(decoded.name).toBe('Custom');
+		expect(decoded.records).toEqual(customTemplate.records);
 	});
 
 	it('starts with t1. prefix', () => {
-		const encoded = encodeTemplateURL(testTemplate);
+		const encoded = encodeTemplateURL(customTemplate);
 		expect(encoded.startsWith('t1.')).toBe(true);
 	});
 
 	it('strips id', () => {
-		const encoded = encodeTemplateURL(testTemplate);
+		const encoded = encodeTemplateURL(customTemplate);
 		const decoded = decodeTemplateURL(encoded);
 		expect(decoded).not.toHaveProperty('id');
 	});

src/lib/sharing.ts

@@ -1,5 +1,6 @@
 import pako from 'pako';
 import type { Character, Template } from './types';
+import { presets } from './presets';
 
 function toBase64url(bytes: Uint8Array): string {
 	let binary = '';
@@ -26,20 +27,32 @@ function pruneEmpty(data: Record<string, unknown>): Record<string, unknown> {
 }
 
 export function encodeCharacterURL(char: Character): string {
-	const payload = {
-		template: stripId(char.template),
+	const isPreset = char.template.id.startsWith('preset:');
+	const payload: any = {
 		data: pruneEmpty(char.data)
 	};
+	if (isPreset) {
+		payload.templateId = char.template.id;
+	} else {
+		payload.template = stripId(char.template);
+	}
 	const json = JSON.stringify(payload);
 	const compressed = pako.deflate(new TextEncoder().encode(json));
 	return 'c1.' + toBase64url(compressed);
 }
 
-export function decodeCharacterURL(encoded: string): { template: Omit<Template, 'id'>; data: Record<string, unknown> } {
+export function decodeCharacterURL(encoded: string): { template: Template | Omit<Template, 'id'>; data: Record<string, unknown> } {
 	if (!encoded.startsWith('c1.')) throw new Error('Invalid character URL prefix');
 	const bytes = fromBase64url(encoded.slice(3));
 	const json = new TextDecoder().decode(pako.inflate(bytes));
-	return JSON.parse(json);
+	const payload = JSON.parse(json);
+
+	if (payload.templateId) {
+		const preset = presets.find((p) => p.id === payload.templateId);
+		if (!preset) throw new Error(`Unknown template: ${payload.templateId}`);
+		return { template: preset, data: payload.data };
+	}
+	return { template: payload.template, data: payload.data };
 }
 
 export function encodeTemplateURL(template: Template): string {

src/routes/+page.svelte

@@ -1,15 +1,33 @@
 <script lang="ts">
+	import { onMount } from 'svelte';
 	import Header from '$lib/components/Header.svelte';
 	import SchemaForm from '$lib/components/SchemaForm.svelte';
 	import OutputPanel from '$lib/components/OutputPanel.svelte';
+	import ImportModal from '$lib/components/ImportModal.svelte';
 	import { roster } from '$lib/state.svelte';
 	import { presets } from '$lib/presets';
+
+	let importData = $state<string | null>(null);
+
+	onMount(() => {
+		const hash = window.location.hash.slice(1);
+		if (hash && (hash.startsWith('c1.') || hash.startsWith('t1.'))) {
+			importData = hash;
+		}
+	});
+
+	function closeImport() {
+		importData = null;
+		history.replaceState(null, '', window.location.pathname);
+	}
 </script>
 
 <div class="min-h-screen flex flex-col">
 	<Header />
 
-	{#if roster.active}
+	{#if importData}
+		<ImportModal encoded={importData} onClose={closeImport} />
+	{:else if roster.active}
 		{@const char = roster.active}
 		<main class="flex-1 grid grid-cols-1 lg:grid-cols-[1fr_1fr]">
 			<div class="p-4">