fix: bump comment text to text-base + reload annotations on block delete

Comment text:
- Body and quote bumped from text-sm (14px) to text-base (16px)
  to visually match the font-sans author name at text-sm

Annotation reload on delete:
- Add annotationReloadKey prop through DocumentViewer → PdfViewer
- Increment key after block delete in +page.svelte
- PdfViewer reloads annotations when key changes
- Annotation rectangle disappears immediately, not just after refresh

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

frontend/src/lib/components/CommentThread.svelte

@@ -240,7 +240,7 @@ onMount(() => {
 							{/if}
 						</div>
 						{#if parsed.quote}
-							<div class="my-1 border-l-2 border-line pl-2 font-serif text-sm text-ink-3 italic">
+							<div class="my-1 border-l-2 border-line pl-2 font-serif text-base text-ink-3 italic">
 								&ldquo;{parsed.quote}&rdquo;
 							</div>
 						{/if}
@@ -258,7 +258,7 @@ onMount(() => {
 							<!-- svelte-ignore a11y_no_static_element_interactions -->
 							<div class="relative" onclick={() => { if (isOwn(msg)) startEdit(msg); }}>
 								<p
-									class="font-serif text-sm leading-relaxed text-ink-2 {isOwn(msg) ? '-mx-1 cursor-text rounded px-1 transition-colors hover:bg-surface' : ''}"
+									class="font-serif text-base leading-relaxed text-ink-2 {isOwn(msg) ? '-mx-1 cursor-text rounded px-1 transition-colors hover:bg-surface' : ''}"
 								>
 									<!-- eslint-disable-next-line svelte/no-at-html-tags -- renderBody escapes all HTML before injecting mention links -->
 									{@html renderBody(parsed.body, msg.mentionDTOs ?? [])}

frontend/src/lib/components/DocumentViewer.svelte

@@ -18,6 +18,7 @@ type Props = {
 	error: string;
 	transcribeMode?: boolean;
 	blockNumbers?: Record<string, number>;
+	annotationReloadKey?: number;
 	activeAnnotationId: string | null;
 	onAnnotationClick: (id: string) => void;
 	onTranscriptionDraw?: (rect: DrawRect) => void;
@@ -30,6 +31,7 @@ let {
 	error,
 	transcribeMode = false,
 	blockNumbers = {},
+	annotationReloadKey = 0,
 	activeAnnotationId = $bindable(),
 	onAnnotationClick,
 	onTranscriptionDraw
@@ -86,6 +88,7 @@ let {
 			documentId={doc.id}
 			transcribeMode={transcribeMode}
 			blockNumbers={blockNumbers}
+			annotationReloadKey={annotationReloadKey}
 			bind:activeAnnotationId={activeAnnotationId}
 			onAnnotationClick={onAnnotationClick}
 			onTranscriptionDraw={onTranscriptionDraw}

frontend/src/lib/components/PdfViewer.svelte

@@ -12,6 +12,7 @@ let {
 	documentId = '',
 	transcribeMode = false,
 	blockNumbers = {},
+	annotationReloadKey = 0,
 	activeAnnotationId = $bindable<string | null>(null),
 	onAnnotationClick,
 	onTranscriptionDraw,
@@ -21,6 +22,7 @@ let {
 	documentId?: string;
 	transcribeMode?: boolean;
 	blockNumbers?: Record<string, number>;
+	annotationReloadKey?: number;
 	activeAnnotationId?: string | null;
 	onAnnotationClick?: (id: string) => void;
 	onTranscriptionDraw?: (rect: DrawRect) => void;
@@ -208,7 +210,7 @@ $effect(() => {
 });
 
 $effect(() => {
-	if (documentId) {
+	if (documentId && annotationReloadKey >= 0) {
 		loadAnnotations(documentId);
 	}
 });

frontend/src/routes/documents/[id]/+page.svelte

@@ -54,6 +54,7 @@ let activeAnnotationId = $state<string | null>(null);
 // ── Transcription blocks ─────────────────────────────────────────────────────
 
 let transcriptionBlocks = $state<TranscriptionBlockData[]>([]);
+let annotationReloadKey = $state(0);
 
 const blockNumbers = $derived(
 	Object.fromEntries(
@@ -92,6 +93,7 @@ async function deleteBlock(blockId: string) {
 	});
 	if (!res.ok) throw new Error('Delete failed');
 	transcriptionBlocks = transcriptionBlocks.filter((b) => b.id !== blockId);
+	annotationReloadKey++;
 }
 
 async function createBlockFromDraw(rect: {
@@ -208,6 +210,7 @@ onMount(() => {
 				error={fileError}
 				transcribeMode={transcribeMode}
 				blockNumbers={blockNumbers}
+				annotationReloadKey={annotationReloadKey}
 				bind:activeAnnotationId={activeAnnotationId}
 				onAnnotationClick={handleAnnotationClick}
 				onTranscriptionDraw={createBlockFromDraw}