feat: support manual add and edit for memory facts (#1538)

* feat: support manual add and edit for memory facts

* fix: restore memory updater save helper

* fix: address memory fact review feedback

* fix: remove duplicate memory fact edit action

* docs: simplify memory fact review setup

* docs: relax memory review startup instructions

* fix: clear rebase marker in memory settings page

* fix: address memory fact review and format issues

* fix: address memory fact review feedback

* refactor: make memory fact updates explicit patch semantics

---------

Co-authored-by: Willem Jiang <willem.jiang@gmail.com>

frontend/src/core/memory/hooks.ts

@@ -1,7 +1,17 @@
 import { useMutation, useQuery, useQueryClient } from "@tanstack/react-query";
 
-import { clearMemory, deleteMemoryFact, loadMemory } from "./api";
-import type { UserMemory } from "./types";
+import {
+  clearMemory,
+  createMemoryFact,
+  deleteMemoryFact,
+  loadMemory,
+  updateMemoryFact,
+} from "./api";
+import type {
+  MemoryFactInput,
+  MemoryFactPatchInput,
+  UserMemory,
+} from "./types";
 
 export function useMemory() {
   const { data, isLoading, error } = useQuery({
@@ -32,3 +42,31 @@ export function useDeleteMemoryFact() {
     },
   });
 }
+
+export function useCreateMemoryFact() {
+  const queryClient = useQueryClient();
+
+  return useMutation({
+    mutationFn: (input: MemoryFactInput) => createMemoryFact(input),
+    onSuccess: (memory) => {
+      queryClient.setQueryData<UserMemory>(["memory"], memory);
+    },
+  });
+}
+
+export function useUpdateMemoryFact() {
+  const queryClient = useQueryClient();
+
+  return useMutation({
+    mutationFn: ({
+      factId,
+      input,
+    }: {
+      factId: string;
+      input: MemoryFactPatchInput;
+    }) => updateMemoryFact(factId, input),
+    onSuccess: (memory) => {
+      queryClient.setQueryData<UserMemory>(["memory"], memory);
+    },
+  });
+}