feat(drive): move UI to {created,updated}_by

frontend/src/lib/api/types.ts

@@ -29,7 +29,22 @@ export interface FolderItem {
 	// hierarchy fields (including owner_id) for non-owner callers.
 	// Backend serialises `Option<String>` (folder_dto.rs:53); this
 	// type just tells the truth about the wire.
+	//
+	// Deprecated post-D7 (frontend cutover): callers should prefer
+	// `created_by` / `updated_by` instead — they carry §14 provenance
+	// and survive the drop of `storage.folders.user_id`. The
+	// `owner_id` field will be removed from the wire once every
+	// callsite has moved.
 	owner_id: string | null;
+	// §14 provenance — who originally created the folder. `null` when
+	// the creating user has since been deleted (backend FK is
+	// `ON DELETE SET NULL`). Preferred over `owner_id` on the Files
+	// browser owner column and the Favorites / Shared surfaces.
+	created_by: string | null;
+	// §14 provenance — who last touched the folder (rename / move /
+	// metadata change). Preferred over `owner_id` on the Recent
+	// surface, where "who touched this recently" is the intent.
+	updated_by: string | null;
 	parent_id: string | null;
 	path: string;
 	etag: string;
@@ -46,7 +61,13 @@ export interface FileItem {
 	name: string;
 	// `null` on share-recipient responses (same as FolderItem above).
 	// Backend serialises `Option<String>` at file_dto.rs:59.
+	//
+	// Deprecated post-D7 (frontend cutover): prefer `created_by` /
+	// `updated_by` as documented on `FolderItem`.
 	owner_id: string | null;
+	// §14 provenance — see FolderItem for semantics.
+	created_by: string | null;
+	updated_by: string | null;
 	folder_id: string;
 	path: string;
 	size: number;

frontend/src/lib/components/FileViewer.test.ts

@@ -29,6 +29,8 @@ function file(over: Record<string, unknown> = {}) {
 		category: 'Image',
 		folder_id: '',
 		owner_id: '',
+		created_by: null,
+		updated_by: null,
 		path: '',
 		size: 1,
 		modified_at: 0,

frontend/src/lib/components/MoveDialog.test.ts

@@ -58,6 +58,8 @@ function folder(id: string, name: string) {
 		modified_at: 0,
 		name,
 		owner_id: 'me',
+		created_by: 'me',
+		updated_by: 'me',
 		parent_id: 'home',
 		path: '/' + name,
 		etag: 'e'

frontend/src/lib/components/PhotoLightbox.test.ts

@@ -21,6 +21,8 @@ function item(id: string) {
 		category: 'Image',
 		folder_id: '',
 		owner_id: '',
+		created_by: null,
+		updated_by: null,
 		path: '',
 		size: 1,
 		modified_at: 0,

frontend/src/lib/utils/media.ts

@@ -31,6 +31,8 @@ export function minimalPhotoItem(id: string): FileItem {
 		modified_at: 0,
 		name: '',
 		owner_id: '',
+		created_by: null,
+		updated_by: null,
 		folder_id: '',
 		path: '',
 		size: 0,

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

@@ -40,7 +40,11 @@
 	const entries = $derived(
 		raw.map((it): ResourceEntry => {
 			const isFile = it.resource_type === 'file';
-			const ownerId = it.resource.owner_id ?? null;
+			// §14 provenance — prefer `created_by` (who put the item
+			// into the system) over the deprecated `owner_id`. Fall
+			// back to `owner_id` for pre-D7 rows whose `created_by`
+			// column wasn't backfilled.
+			const ownerId = it.resource.created_by ?? it.resource.owner_id ?? null;
 			return {
 				id: it.resource.id,
 				name: it.resource.name,
@@ -106,7 +110,7 @@
 			});
 			raw = reset ? page.items : [...raw, ...page.items];
 			cursor = page.next_cursor;
-			void owners.resolve(page.items.map((i) => i.resource.owner_id));
+			void owners.resolve(page.items.map((i) => i.resource.created_by ?? i.resource.owner_id));
 		} catch (e) {
 			console.error('favorites: load error', e);
 			error = t('errors_loadFailed', 'Failed to load items');

frontend/src/routes/favorites/page.test.ts

@@ -42,6 +42,8 @@ function withOneFile() {
 					modified_at: 0,
 					name: 'photo.png',
 					owner_id: 'me',
+					created_by: 'me',
+					updated_by: 'me',
 					folder_id: 'root',
 					path: '/photo.png',
 					size: 10,

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

@@ -1797,7 +1797,9 @@
 		<div class="grid-meta">
 			<span class="grid-meta__date">{relativeTimeAgo(folder.modified_at)}</span>
 		</div>
-		<div class="owner-cell">{ownerLabel(folder.owner_id, session.user?.id ?? null)}</div>
+		<div class="owner-cell">
+			{ownerLabel(folder.created_by ?? folder.owner_id, session.user?.id ?? null)}
+		</div>
 		<div class="type-cell">{t('files.file_types.folder', 'Folder')}</div>
 		<div class="size-cell">—</div>
 		<div class="date-cell">{formatDate(folder.modified_at)}</div>
@@ -1927,7 +1929,9 @@
 			<span class="grid-meta__date">{relativeTimeAgo(file.modified_at)}</span>
 			{#if file.size != null}<span class="grid-meta__size">{formatBytes(file.size)}</span>{/if}
 		</div>
-		<div class="owner-cell">{ownerLabel(file.owner_id, session.user?.id ?? null)}</div>
+		<div class="owner-cell">
+			{ownerLabel(file.created_by ?? file.owner_id, session.user?.id ?? null)}
+		</div>
 		<div class="type-cell">{typeLabel(file.category)}</div>
 		<div class="size-cell">{file.size != null ? formatBytes(file.size) : ''}</div>
 		<div class="date-cell">{formatDate(file.modified_at)}</div>

frontend/src/routes/files/page.test.ts

@@ -91,6 +91,8 @@ function fileItem(id: string, name: string) {
 		modified_at: 0,
 		name,
 		owner_id: 'me',
+		created_by: 'me',
+		updated_by: 'me',
 		folder_id: 'home',
 		path: '/' + name,
 		size: 4,
@@ -111,6 +113,8 @@ function folderItem(id: string, name: string) {
 		modified_at: 0,
 		name,
 		owner_id: 'me',
+		created_by: 'me',
+		updated_by: 'me',
 		parent_id: 'home',
 		path: '/' + name,
 		etag: 'e'

frontend/src/routes/photos/page.test.ts

@@ -35,6 +35,8 @@ function photo(id: string) {
 		modified_at: 0,
 		name: id + '.jpg',
 		owner_id: 'me',
+		created_by: 'me',
+		updated_by: 'me',
 		folder_id: 'home',
 		path: '/' + id + '.jpg',
 		size: 100,

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

@@ -42,7 +42,11 @@
 	const entries = $derived(
 		raw.map((it): ResourceEntry => {
 			const isFile = it.resource_type === 'file';
-			const ownerId = it.resource.owner_id ?? null;
+			// §14 provenance — Recent's mental model is "who touched
+			// this recently", so `updated_by` (the last mutator) is
+			// preferred over `created_by` (who put it in). Fall back
+			// to `owner_id` for pre-D7 rows with no provenance.
+			const ownerId = it.resource.updated_by ?? it.resource.owner_id ?? null;
 			return {
 				id: it.resource.id,
 				name: it.resource.name,
@@ -118,7 +122,7 @@
 			});
 			raw = reset ? page.items : [...raw, ...page.items];
 			cursor = page.next_cursor;
-			void owners.resolve(page.items.map((i) => i.resource.owner_id));
+			void owners.resolve(page.items.map((i) => i.resource.updated_by ?? i.resource.owner_id));
 		} catch (e) {
 			console.error('recent: load error', e);
 			error = t('errors_loadFailed', 'Failed to load items');

frontend/src/routes/recent/page.test.ts

@@ -46,6 +46,8 @@ function withOneFile() {
 					modified_at: 0,
 					name: 'notes.txt',
 					owner_id: 'me',
+					created_by: 'me',
+					updated_by: 'me',
 					folder_id: 'root',
 					path: '/notes.txt',
 					size: 4,

frontend/src/routes/shared/page.test.ts

@@ -47,6 +47,8 @@ function grantItem() {
 			modified_at: 0,
 			name: 'Docs',
 			owner_id: 'me',
+			created_by: 'me',
+			updated_by: 'me',
 			parent_id: null,
 			path: '/Docs',
 			etag: 'e'