fix(offline): pre-cache home README under its synthetic key

The home page reads README via getCachedMainReadme, which uses
Note-{owner}-{repo}-README, not the blob SHA. Cache-all only wrote
SHA-keyed entries, so the homepage README was empty offline.

src/hooks/useOfflineNotes.hook.ts

@@ -5,7 +5,7 @@ import { data, generateId } from "@/data/data"
 import { DataType } from "@/data/DataType.enum"
 import { prepareNoteCache } from "@/modules/note/cache/prepareNoteCache"
 import { Note } from "@/modules/note/models/Note"
-import { queryFileContent } from "@/modules/repo/services/repo"
+import { getMainReadme, queryFileContent } from "@/modules/repo/services/repo"
 import { useUserRepoStore } from "@/modules/repo/store/userRepo.store"
 
 export const useOfflineNotes = () => {
@@ -13,6 +13,7 @@ export const useOfflineNotes = () => {
   const totalOfNotes = computed(() => store.files.length)
 
   const noteCompleted = ref(0)
+  const failedNotes = ref(0)
 
   const cacheAllNotes = async () => {
     const isInitialized = store.user && store.repo && totalOfNotes.value > 0
@@ -30,6 +31,7 @@ export const useOfflineNotes = () => {
     const cachedNotesSet = new Set(cachedNotesFromSha.map((note) => note._id))
 
     noteCompleted.value = 0
+    failedNotes.value = 0
 
     for (const file of store.files) {
       noteCompleted.value++
@@ -50,11 +52,18 @@ export const useOfflineNotes = () => {
       )
 
       if (!contentFile) {
-        return null
+        failedNotes.value++
+        continue
       }
 
       saveCacheNote(contentFile)
     }
+
+    try {
+      await getMainReadme(store.user, store.repo)
+    } catch {
+      failedNotes.value++
+    }
   }
   const { execute, isLoading } = useAsyncState(cacheAllNotes, null, {
     immediate: false
@@ -64,6 +73,7 @@ export const useOfflineNotes = () => {
     cacheAllNotes: execute,
     isLoading,
     totalOfNotes,
-    noteCompleted
+    noteCompleted,
+    failedNotes
   }
 }

src/modules/note/components/CacheAllNote.vue

@@ -1,14 +1,20 @@
 <script setup lang="ts">
 import { useOfflineNotes } from "@/hooks/useOfflineNotes.hook"
-import { confirmMessage } from "@/utils/notif"
+import { confirmMessage, errorMessage } from "@/utils/notif"
 
-const { cacheAllNotes, isLoading, totalOfNotes, noteCompleted } =
+const { cacheAllNotes, isLoading, totalOfNotes, noteCompleted, failedNotes } =
   useOfflineNotes()
 
 const confirmBeforeCachingAllNotes = async () => {
   confirm("Do you want to cache all notes?")
   await cacheAllNotes()
+  if (failedNotes.value > 0) {
+    errorMessage(
+      `${failedNotes.value} of ${totalOfNotes.value} note(s) could not be cached — try again`
+    )
+  } else {
     confirmMessage("✅ All notes have been locally saved")
+  }
 }
 </script>