fix(web): render full document content in viewer

The memories list endpoint caps content at 2000 chars; the document
modal rendered straight from that list cache, so long Claude Code
sessions (and any doc over the cap) were truncated mid-transcript.
Fetch the full document by id when the modal opens and use it for
parsing, the editor, and content rendering.

Also closes a latent data-loss path where the editor initialized from
truncated content, so a save could overwrite the stored document.

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

@@ -27,6 +27,7 @@ import type { UseMutationResult } from "@tanstack/react-query"
 import { toast } from "sonner"
 import { useIsMobile } from "@hooks/use-mobile"
 import { parsePluginDocument } from "@/lib/plugin-document"
+import { useFullDocumentContent } from "@/hooks/use-full-document"
 
 type DocumentsResponse = z.infer<typeof DocumentsWithMemoriesResponseSchema>
 type DocumentWithMemories = DocumentsResponse["documents"][0]
@@ -198,16 +199,25 @@ export function DocumentModal({
 	const isMobile = useIsMobile()
 	const { updateMutation, deleteMutation } = useDocumentMutations({ onClose })
 
+	const fullContent = useFullDocumentContent(_document?.id, isOpen)
+	const effectiveDocument = useMemo(
+		() =>
+			_document && fullContent !== null
+				? { ..._document, content: fullContent }
+				: _document,
+		[_document, fullContent],
+	)
+
 	const { initialEditorContent, initialEditorString } = useMemo(() => {
-		const content = _document?.content as string | null | undefined
+		const content = effectiveDocument?.content as string | null | undefined
 		return {
 			initialEditorContent: content ?? undefined,
 			initialEditorString: content ?? "",
 		}
-	}, [_document?.content])
+	}, [effectiveDocument?.content])
 	const pluginDocument = useMemo(
-		() => parsePluginDocument(_document),
-		[_document],
+		() => parsePluginDocument(effectiveDocument),
+		[effectiveDocument],
 	)
 
 	const [draftContentString, setDraftContentString] =
@@ -281,7 +291,7 @@ export function DocumentModal({
 			className="bg-[#14161A] rounded-[14px] overflow-hidden flex min-h-0 flex-1 flex-col shadow-[inset_0_2px_4px_rgba(0,0,0,0.3),inset_0_1px_2px_rgba(0,0,0,0.1)] relative"
 		>
 			<DocumentContent
-				document={_document}
+				document={effectiveDocument}
 				textEditorProps={textEditorProps}
 				pluginDocument={pluginDocument}
 			/>

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

@@ -0,0 +1,29 @@
+import { useQuery } from "@tanstack/react-query"
+import { $fetch } from "@lib/api"
+
+// List endpoint truncates `content` to ~2000 chars; fetch the full doc by id for the viewer.
+export function useFullDocumentContent(
+	documentId: string | null | undefined,
+	enabled: boolean,
+): string | null {
+	const isReal = !!documentId && !documentId.startsWith("temp-")
+
+	const { data } = useQuery({
+		queryKey: ["document-full", documentId],
+		enabled: enabled && isReal,
+		staleTime: 5 * 60 * 1000,
+		queryFn: async () => {
+			const res = await $fetch("@get/documents/:id", {
+				params: { id: documentId as string },
+				disableValidation: true,
+			})
+			if (res.error) {
+				throw new Error(res.error?.message || "Failed to fetch document")
+			}
+			const doc = res.data as { content?: string | null } | null
+			return typeof doc?.content === "string" ? doc.content : null
+		},
+	})
+
+	return data ?? null
+}