perf(frontend): lazy-load ShareDialog and MoveDialog

ShareDialog (~15 KB JS) and MoveDialog (~5 KB JS) were statically imported by the
files, favorites, recent and shared routes, so they downloaded on every visit
even if the user never opened a share/move dialog. Convert them to the existing
lazyComponent pattern (as already used for FileViewer/WopiEditor): the chunk is
fetched the first time the dialog is opened.

The Vite manifest confirms both flip from static to isDynamicEntry. This defers
~26 KB raw / ~9.5 KB gzipped (JS + CSS) off the initial load of those four routes.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

frontend/src/routes/favorites/+page.svelte

@@ -19,8 +19,6 @@
 	import { renameFolder, deleteFolder } from '$lib/api/endpoints/folders';
 	import type { FileItem } from '$lib/api/types';
 	import { lazyComponent } from '$lib/composables/lazyComponent.svelte';
-	import MoveDialog from '$lib/components/MoveDialog.svelte';
-	import ShareDialog from '$lib/components/ShareDialog.svelte';
 	import ResourceList, {
 		type ContextAction,
 		type GroupByDef,
@@ -127,8 +125,12 @@
 	// The file preview is loaded the first time a file is opened, keeping its
 	// module out of this route's initial chunk.
 	const fileViewer = lazyComponent(() => import('$lib/components/FileViewer.svelte'));
+	const moveDialog = lazyComponent(() => import('$lib/components/MoveDialog.svelte'));
+	const shareDialog = lazyComponent(() => import('$lib/components/ShareDialog.svelte'));
 	$effect(() => {
 		if (viewerOpen) void fileViewer.load();
+		if (moveOpen) void moveDialog.load();
+		if (shareOpen) void shareDialog.load();
 	});
 
 	function open(entry: ResourceEntry) {
@@ -317,6 +319,8 @@
 	{@const FileViewer = fileViewer.component}
 	<FileViewer bind:open={viewerOpen} file={viewerFile} />
 {/if}
+{#if moveDialog.component}
+	{@const MoveDialog = moveDialog.component}
 	<MoveDialog
 		bind:open={moveOpen}
 		item={moveTarget}
@@ -326,4 +330,8 @@
 			load(true, orderByForGroup());
 		}}
 	/>
+{/if}
+{#if shareDialog.component}
+	{@const ShareDialog = shareDialog.component}
 	<ShareDialog bind:open={shareOpen} item={shareTarget} />
+{/if}

frontend/src/routes/files/[...path]/+page.svelte

@@ -44,8 +44,6 @@
 	import type { FileItem, FolderItem, ItemType } from '$lib/api/types';
 	import ListToolbar from '$lib/components/ListToolbar.svelte';
 	import VirtualList from '$lib/components/VirtualList.svelte';
-	import MoveDialog from '$lib/components/MoveDialog.svelte';
-	import ShareDialog from '$lib/components/ShareDialog.svelte';
 	import { lazyComponent } from '$lib/composables/lazyComponent.svelte';
 	import { t } from '$lib/i18n/index.svelte';
 	import { confirmDialog, promptDialog } from '$lib/stores/dialogs.svelte';
@@ -69,6 +67,8 @@
 	// call `.load()` when `viewerOpen` / `wopiOpen` flip true).
 	const fileViewer = lazyComponent(() => import('$lib/components/FileViewer.svelte'));
 	const wopiEditor = lazyComponent(() => import('$lib/components/WopiEditor.svelte'));
+	const moveDialog = lazyComponent(() => import('$lib/components/MoveDialog.svelte'));
+	const shareDialog = lazyComponent(() => import('$lib/components/ShareDialog.svelte'));
 
 	// The URL rest param is the trail of folder ids from home's children down.
 	// /files → home root; /files/a/b → folder b inside a inside home.
@@ -1083,6 +1083,8 @@
 	$effect(() => {
 		if (viewerOpen) void fileViewer.load();
 		if (wopiOpen) void wopiEditor.load();
+		if (moveOpen) void moveDialog.load();
+		if (shareOpen) void shareDialog.load();
 	});
 	// Editability of the current context-menu target file, resolved async.
 	let ctxCanEditWopi = $state(false);
@@ -1936,6 +1938,8 @@
 	</div>
 {/snippet}
 
+{#if moveDialog.component}
+	{@const MoveDialog = moveDialog.component}
 	<MoveDialog
 		bind:open={moveOpen}
 		item={actionTarget}
@@ -1946,11 +1950,15 @@
 			void reload();
 		}}
 	/>
+{/if}
+{#if shareDialog.component}
+	{@const ShareDialog = shareDialog.component}
 	<ShareDialog
 		bind:open={shareOpen}
 		item={actionTarget}
 		onshared={(id) => (sharedIds = new SvelteSet(sharedIds).add(id))}
 	/>
+{/if}
 {#if fileViewer.component}
 	{@const FileViewer = fileViewer.component}
 	<FileViewer bind:open={viewerOpen} file={viewerFile} />

frontend/src/routes/recent/+page.svelte

@@ -20,8 +20,6 @@
 	import { renameFolder, deleteFolder } from '$lib/api/endpoints/folders';
 	import type { FileItem, ItemType } from '$lib/api/types';
 	import { lazyComponent } from '$lib/composables/lazyComponent.svelte';
-	import MoveDialog from '$lib/components/MoveDialog.svelte';
-	import ShareDialog from '$lib/components/ShareDialog.svelte';
 	import ResourceList, {
 		type ContextAction,
 		type GroupByDef,
@@ -139,8 +137,12 @@
 	// The file preview is loaded the first time a file is opened, keeping its
 	// module out of this route's initial chunk.
 	const fileViewer = lazyComponent(() => import('$lib/components/FileViewer.svelte'));
+	const moveDialog = lazyComponent(() => import('$lib/components/MoveDialog.svelte'));
+	const shareDialog = lazyComponent(() => import('$lib/components/ShareDialog.svelte'));
 	$effect(() => {
 		if (viewerOpen) void fileViewer.load();
+		if (moveOpen) void moveDialog.load();
+		if (shareOpen) void shareDialog.load();
 	});
 
 	function open(entry: ResourceEntry) {
@@ -362,6 +364,8 @@
 	{@const FileViewer = fileViewer.component}
 	<FileViewer bind:open={viewerOpen} file={viewerFile} />
 {/if}
+{#if moveDialog.component}
+	{@const MoveDialog = moveDialog.component}
 	<MoveDialog
 		bind:open={moveOpen}
 		item={moveTarget}
@@ -371,4 +375,8 @@
 			load(true, orderByForGroup());
 		}}
 	/>
+{/if}
+{#if shareDialog.component}
+	{@const ShareDialog = shareDialog.component}
 	<ShareDialog bind:open={shareOpen} item={shareTarget} />
+{/if}

frontend/src/routes/shared/+page.svelte

@@ -22,7 +22,7 @@
 	import type { FileItem, FolderItem, ItemType } from '$lib/api/types';
 	import Icon from '$lib/icons/Icon.svelte';
 	import ListToolbar from '$lib/components/ListToolbar.svelte';
-	import ShareDialog from '$lib/components/ShareDialog.svelte';
+	import { lazyComponent } from '$lib/composables/lazyComponent.svelte';
 	import UserVignette from '$lib/components/UserVignette.svelte';
 	import { t } from '$lib/i18n/index.svelte';
 	import { ui } from '$lib/stores/ui.svelte';
@@ -55,6 +55,13 @@
 	let dialogOpen = $state(false);
 	let dialogItem = $state<{ id: string; name: string; kind: ItemType } | null>(null);
 
+	// ShareDialog is heavy and only opens on demand — keep it out of this route's
+	// initial chunk and load it the first time the dialog is opened.
+	const shareDialog = lazyComponent(() => import('$lib/components/ShareDialog.svelte'));
+	$effect(() => {
+		if (dialogOpen) void shareDialog.load();
+	});
+
 	// Open kebab menu, keyed by grant id.
 	let menuFor = $state<string | null>(null);
 
@@ -580,7 +587,10 @@
 	</div>
 {/if}
 
+{#if shareDialog.component}
+	{@const ShareDialog = shareDialog.component}
 	<ShareDialog bind:open={dialogOpen} item={dialogItem} />
+{/if}
 
 <style>
 	.ms-lanes {