Fix batch payload shape and deselect-to-one bulk submit

- Send batch documents as {content} objects (matches the endpoint's existing callers) instead of a raw string array.
- Treat bulkUrls as the source of truth: 1 remaining selection saves via single-add instead of erroring.

apps/web/components/add-document/index.tsx

@@ -188,11 +188,21 @@ export function AddDocument({
 
 	const handleLinkSubmit = useCallback(
 		(data: LinkData) => {
-			if (data.bulkUrls && data.bulkUrls.length >= 2) {
-				bulkLinkMutation.mutate({
-					urls: data.bulkUrls,
-					project: localSelectedProject,
-				})
+			// In bulk mode the selection is the source of truth, not the raw textarea.
+			if (data.bulkUrls) {
+				if (data.bulkUrls.length >= 2) {
+					bulkLinkMutation.mutate({
+						urls: data.bulkUrls,
+						project: localSelectedProject,
+					})
+					return
+				}
+				const [onlyUrl] = data.bulkUrls
+				if (onlyUrl) {
+					linkMutation.mutate({ url: onlyUrl, project: localSelectedProject })
+					return
+				}
+				toast.error("Select at least one link")
 				return
 			}
 			if (!data.url.trim()) {

apps/web/hooks/use-document-mutations.ts

@@ -377,10 +377,12 @@ export function useDocumentMutations({
 				const chunk = urls.slice(i, i + BULK_LINK_BATCH_SIZE)
 				const response = await $fetch("@post/documents/batch", {
 					body: {
-						documents: chunk,
-						containerTag: project,
-						entityContext,
-						metadata: { sm_source: "consumer" },
+						documents: chunk.map((url) => ({
+							content: url,
+							containerTags: [project],
+							entityContext,
+							metadata: { sm_source: "consumer" },
+						})),
 					},
 				})
 				if (response.error) {

packages/lib/api.ts

@@ -193,7 +193,18 @@ export const apiSchema = createSchema({
 	},
 	"@post/documents/batch": {
 		input: z.object({
-			documents: z.array(z.string()).min(1).max(600),
+			documents: z
+				.array(
+					z.object({
+						content: z.string(),
+						containerTags: z.array(z.string()).optional(),
+						containerTag: z.string().optional(),
+						entityContext: z.string().max(1500).optional(),
+						metadata: z.record(z.unknown()).optional(),
+					}),
+				)
+				.min(1)
+				.max(600),
 			containerTag: z.string().optional(),
 			entityContext: z.string().max(1500).optional(),
 			metadata: z.record(z.unknown()).optional(),