fix: i18n system overhaul and sidebar UI bugs

- Fix LanguageProvider: add RTL support (ar/fa), translation caching,
  prevent blank flash during load, browser language detection
- Fix detect-user-language: extend whitelist from 5 to all 15 languages
- Remove hardcoded initialLanguage="fr" from auth layout
- Complete fr.json translation (all sections translated from English)
- Add missing admin.ai keys to all 13 non-English locales
- Translate ai.autoLabels, ai.batchOrganization, memoryEcho sections
  for all locales
- Remove duplicate top-level autoLabels/batchOrganization from en.json
- Fix notebook creation: replace window.location.reload() with
  createNotebookOptimistic + router.refresh()
- Fix notebook name truncation in sidebar with min-w-0
- Remove redundant router.refresh() after note creation in page.tsx

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

keep-notes/app/(main)/page.tsx

@@ -3,7 +3,7 @@
 import { useState, useEffect, useCallback } from 'react'
 import { useSearchParams, useRouter } from 'next/navigation'
 import { Note } from '@/lib/types'
-import { getAllNotes, getPinnedNotes, getRecentNotes, searchNotes } from '@/app/actions/notes'
+import { getAllNotes, searchNotes } from '@/app/actions/notes'
 import { getAISettings } from '@/app/actions/ai-settings'
 import { NoteInput } from '@/components/note-input'
 import { MasonryGrid } from '@/components/masonry-grid'
@@ -35,7 +35,7 @@ export default function HomePage() {
   const [notes, setNotes] = useState<Note[]>([])
   const [pinnedNotes, setPinnedNotes] = useState<Note[]>([])
   const [recentNotes, setRecentNotes] = useState<Note[]>([])
-  const [showRecentNotes, setShowRecentNotes] = useState(false)
+  const [showRecentNotes, setShowRecentNotes] = useState(true)
   const [editingNote, setEditingNote] = useState<{ note: Note; readOnly?: boolean } | null>(null)
   const [isLoading, setIsLoading] = useState(true)
   const [notebookSuggestion, setNotebookSuggestion] = useState<{ noteId: string; content: string } | null>(null)
@@ -137,8 +137,9 @@ export default function HomePage() {
 
     }
 
-    // Refresh in background to ensure data consistency (non-blocking)
-    router.refresh()
+    // Note: revalidatePath('/') is already called in the server action,
+    // and the optimistic update above already adds the note to state.
+    // No additional router.refresh() needed — avoids visible re-render flash.
   }, [searchParams, labels, router])
 
   const handleOpenNote = (noteId: string) => {
@@ -156,9 +157,11 @@ export default function HomePage() {
     const loadSettings = async () => {
       try {
         const settings = await getAISettings()
-        setShowRecentNotes(settings.showRecentNotes === true)
+        // Default to true if setting is undefined or null
+        setShowRecentNotes(settings?.showRecentNotes !== false)
       } catch (error) {
-        setShowRecentNotes(false)
+        // Default to true on error
+        setShowRecentNotes(true)
       }
     }
     loadSettings()
@@ -203,19 +206,31 @@ export default function HomePage() {
         )
       }
 
-      // Load pinned notes separately (shown in favorites section)
-      const pinned = await getPinnedNotes(notebookFilter || undefined)
+      // Derive pinned notes from already-fetched allNotes (no extra server call)
+      const pinnedFilter = notebookFilter
+        ? allNotes.filter((note: any) => note.isPinned && note.notebookId === notebookFilter)
+        : allNotes.filter((note: any) => note.isPinned && !note.notebookId)
 
-      setPinnedNotes(pinned)
+      setPinnedNotes(pinnedFilter)
 
-      // Load recent notes only if enabled in settings
+      // Derive recent notes from already-fetched allNotes (no extra server call)
       if (showRecentNotes) {
-        const recent = await getRecentNotes(3)
-        // Filter recent notes by current filters
+        const sevenDaysAgo = new Date()
+        sevenDaysAgo.setDate(sevenDaysAgo.getDate() - 7)
+        sevenDaysAgo.setHours(0, 0, 0, 0)
+
+        const recentFiltered = allNotes
+          .filter((note: any) => {
+            return !note.isArchived && !note.dismissedFromRecent && note.contentUpdatedAt >= sevenDaysAgo
+          })
+          .sort((a: any, b: any) => new Date(b.contentUpdatedAt).getTime() - new Date(a.createdAt).getTime())
+          .slice(0, 3)
+
         if (notebookFilter) {
-          setRecentNotes(recent.filter((note: any) => note.notebookId === notebookFilter))
+          setRecentNotes(recentFiltered.filter((note: any) => note.notebookId === notebookFilter))
         } else {
-          setRecentNotes(recent.filter((note: any) => !note.notebookId))
+          // Show ALL recent notes when in inbox (not just notes without notebooks)
+          setRecentNotes(recentFiltered)
         }
       } else {
         setRecentNotes([])
@@ -392,7 +407,7 @@ export default function HomePage() {
           {/* Recent Notes Section - Only shown if enabled in settings */}
           {showRecentNotes && (
             <RecentNotesSection
-              recentNotes={recentNotes.filter(note => !note.isPinned)}
+              recentNotes={recentNotes}
               onEdit={(note, readOnly) => setEditingNote({ note, readOnly })}
             />
           )}