refactor: isolate auth layout, unify tags, add editor animation and pin indicator

- Create (auth) and (app) layout groups to isolate login/setup pages
  from the main app chrome (header, sidebar, footer)
- Use window.location.href instead of goto() after login/setup to
  ensure clean full-page load across layout groups
- Add reusable TagChip component, used in TagFilter and NoteCard
- Add fade-in/pop-in entrance animation to note editor overlay
- Add persistent clickable pin indicator on pinned cards (top-right
  bookmark icon, replaces hover-only pin button for pinned notes)
- Improve "Add a crumb..." button with + icon and dashed border
- Update CLAUDE.md with retro parchment design system guidelines
- Add /.claude/ to .gitignore

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/lib/components/NoteCard.svelte

@@ -2,6 +2,7 @@
 	import { NOTE_COLORS } from '$lib/utils/colors.js';
 	import { renderMarkdown } from '$lib/utils/markdown.js';
 	import { togglePin, trashNote, archiveNote, unarchiveNote, restoreNote, deleteNote, updateNote, currentFilter } from '$lib/stores/notes.js';
+	import TagChip from './TagChip.svelte';
 	import type { Note } from '$lib/types/index.js';
 	import Undo2 from 'lucide-svelte/icons/undo-2';
 	import Trash2 from 'lucide-svelte/icons/trash-2';
@@ -75,6 +76,17 @@
 	data-testid="note-card"
 	data-note-id={note.id}
 >
+	{#if note.pinned}
+		<button
+			onclick={stop(() => togglePin(note.id, note.pinned))}
+			class="absolute top-1.5 right-1.5 rounded-sm p-1 text-[var(--primary)] hover:bg-[var(--border)]/10"
+			title="Unpin"
+			data-testid="pin-indicator"
+		>
+			<Bookmark class="h-4 w-4 fill-[var(--primary)]" />
+		</button>
+	{/if}
+
 	{#if note.title}
 		<h3 class="mb-2 text-sm font-semibold text-[var(--text)]">{note.title}</h3>
 	{/if}
@@ -106,9 +118,7 @@
 	{#if note.tags && note.tags.length > 0}
 		<div class="mt-2 flex flex-wrap gap-1">
 			{#each note.tags as tag}
-				<span class="rounded-sm bg-[var(--border)]/10 px-2 py-0.5 text-xs text-[var(--text-muted)]">
-					#{tag}
-				</span>
+				<TagChip {tag} />
 			{/each}
 		</div>
 	{/if}
@@ -133,14 +143,16 @@
 				<Trash2 class="h-4 w-4 text-[var(--destructive)]" />
 			</button>
 		{:else}
-			<button
-				onclick={stop(() => togglePin(note.id, note.pinned))}
-				class="rounded-sm p-1.5 hover:bg-[var(--border)]/10"
-				title={note.pinned ? 'Unpin' : 'Pin'}
-				data-testid="pin-btn"
-			>
-				<Bookmark class="h-4 w-4 {note.pinned ? 'fill-[var(--primary)] text-[var(--primary)]' : ''}" />
-			</button>
+			{#if !note.pinned}
+				<button
+					onclick={stop(() => togglePin(note.id, note.pinned))}
+					class="rounded-sm p-1.5 hover:bg-[var(--border)]/10"
+					title="Pin"
+					data-testid="pin-btn"
+				>
+					<Bookmark class="h-4 w-4" />
+				</button>
+			{/if}
 			{#if $currentFilter === 'archived'}
 				<button
 					onclick={stop(() => unarchiveNote(note.id))}

src/lib/components/NoteEditor.svelte

@@ -76,14 +76,14 @@
 
 <!-- svelte-ignore a11y_no_static_element_interactions -->
 <div
-	class="fixed inset-0 z-40 flex items-start justify-center overflow-y-auto bg-black/50 pt-20 pb-10"
+	class="fixed inset-0 z-40 flex items-start justify-center overflow-y-auto bg-black/50 pt-20 pb-10 animate-[fade-in_150ms_ease-out]"
 	onclick={save}
 	onkeydown={handleKeydown}
 	data-testid="note-editor-overlay"
 >
 	<!-- svelte-ignore a11y_no_static_element_interactions -->
 	<div
-		class="mx-4 flex w-full max-w-xl flex-col rounded-sm border border-[var(--border)]"
+		class="mx-4 flex w-full max-w-xl flex-col rounded-sm border border-[var(--border)] shadow-[var(--card-shadow)] animate-[pop-in_150ms_ease-out]"
 		style={bgStyle}
 		onclick={(e) => e.stopPropagation()}
 		onkeydown={(e) => { e.stopPropagation(); handleKeydown(e); }}

src/lib/components/TagChip.svelte

@@ -0,0 +1,28 @@
+<script lang="ts">
+	interface Props {
+		tag: string;
+		active?: boolean;
+		onclick?: () => void;
+	}
+
+	let { tag, active = false, onclick }: Props = $props();
+</script>
+
+{#if onclick}
+	<button
+		{onclick}
+		class="rounded-sm px-2 py-0.5 text-xs font-medium transition-colors {active
+			? 'bg-[var(--primary)] text-white'
+			: 'border border-[var(--border-subtle)] bg-[var(--bg-surface)] text-[var(--text-muted)] hover:border-[var(--primary)]'}"
+		data-testid="tag-chip"
+	>
+		#{tag}
+	</button>
+{:else}
+	<span
+		class="rounded-sm border border-[var(--border-subtle)] bg-[var(--bg-surface)] px-2 py-0.5 text-xs font-medium text-[var(--text-muted)]"
+		data-testid="tag-chip"
+	>
+		#{tag}
+	</span>
+{/if}

src/lib/components/TagFilter.svelte

@@ -1,5 +1,6 @@
 <script lang="ts">
 	import { allTags, selectedTag } from '$lib/stores/notes.js';
+	import TagChip from './TagChip.svelte';
 
 	function toggleTag(tag: string) {
 		selectedTag.update((current) => (current === tag ? null : tag));
@@ -9,13 +10,7 @@
 {#if $allTags.length > 0}
 	<div class="flex flex-wrap gap-2" data-testid="tag-filter">
 		{#each $allTags as tag}
-			<button
-				onclick={() => toggleTag(tag)}
-				class="rounded-sm px-3 py-1 text-xs font-medium transition-colors {$selectedTag === tag ? 'bg-[var(--primary)] text-white' : 'border border-[var(--border-subtle)] bg-[var(--bg-surface)] text-[var(--text-muted)] hover:border-[var(--primary)]'}"
-				data-testid="tag-chip"
-			>
-				#{tag}
-			</button>
+			<TagChip {tag} active={$selectedTag === tag} onclick={() => toggleTag(tag)} />
 		{/each}
 	</div>
 {/if}