feat: Complete internationalization and code cleanup

## Translation Files
- Add 11 new language files (es, de, pt, ru, zh, ja, ko, ar, hi, nl, pl)
- Add 100+ missing translation keys across all 15 languages
- New sections: notebook, pagination, ai.batchOrganization, ai.autoLabels
- Update nav section with workspace, quickAccess, myLibrary keys

## Component Updates
- Update 15+ components to use translation keys instead of hardcoded text
- Components: notebook dialogs, sidebar, header, note-input, ghost-tags, etc.
- Replace 80+ hardcoded English/French strings with t() calls
- Ensure consistent UI across all supported languages

## Code Quality
- Remove 77+ console.log statements from codebase
- Clean up API routes, components, hooks, and services
- Keep only essential error handling (no debugging logs)

## UI/UX Improvements
- Update Keep logo to yellow post-it style (from-yellow-400 to-amber-500)
- Change selection colors to #FEF3C6 (notebooks) and #EFB162 (nav items)
- Make "+" button permanently visible in notebooks section
- Fix grammar and syntax errors in multiple components

## Bug Fixes
- Fix JSON syntax errors in it.json, nl.json, pl.json, zh.json
- Fix syntax errors in notebook-suggestion-toast.tsx
- Fix syntax errors in use-auto-tagging.ts
- Fix syntax errors in paragraph-refactor.service.ts
- Fix duplicate "fusion" section in nl.json

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Ou une version plus courte si vous préférez :

feat(i18n): Add 15 languages, remove logs, update UI components

- Create 11 new translation files (es, de, pt, ru, zh, ja, ko, ar, hi, nl, pl)
- Add 100+ translation keys: notebook, pagination, AI features
- Update 15+ components to use translations (80+ strings)
- Remove 77+ console.log statements from codebase
- Fix JSON syntax errors in 4 translation files
- Fix component syntax errors (toast, hooks, services)
- Update logo to yellow post-it style
- Change selection colors (#FEF3C6, #EFB162)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

keep-notes/components/note-actions.tsx

@@ -18,6 +18,7 @@ import {
 } from "lucide-react"
 import { cn } from "@/lib/utils"
 import { NOTE_COLORS } from "@/lib/types"
+import { useLanguage } from "@/lib/i18n"
 
 interface NoteActionsProps {
   isPinned: boolean
@@ -46,6 +47,8 @@ export function NoteActions({
   onShareCollaborators,
   className
 }: NoteActionsProps) {
+  const { t } = useLanguage()
+
   return (
     <div
       className={cn("flex items-center justify-end gap-1", className)}
@@ -54,7 +57,7 @@ export function NoteActions({
       {/* Color Palette */}
       <DropdownMenu>
         <DropdownMenuTrigger asChild>
-          <Button variant="ghost" size="sm" className="h-8 w-8 p-0" title="Change color">
+          <Button variant="ghost" size="sm" className="h-8 w-8 p-0" title={t('notes.changeColor')}>
             <Palette className="h-4 w-4" />
           </Button>
         </DropdownMenuTrigger>
@@ -79,7 +82,7 @@ export function NoteActions({
       {/* More Options */}
       <DropdownMenu>
         <DropdownMenuTrigger asChild>
-          <Button variant="ghost" size="sm" className="h-8 w-8 p-0" aria-label="More options">
+          <Button variant="ghost" size="sm" className="h-8 w-8 p-0" aria-label={t('notes.moreOptions')}>
             <MoreVertical className="h-4 w-4" />
           </Button>
         </DropdownMenuTrigger>
@@ -88,12 +91,12 @@ export function NoteActions({
             {isArchived ? (
               <>
                 <ArchiveRestore className="h-4 w-4 mr-2" />
-                Unarchive
+                {t('notes.unarchive')}
               </>
             ) : (
               <>
                 <Archive className="h-4 w-4 mr-2" />
-                Archive
+                {t('notes.archive')}
               </>
             )}
           </DropdownMenuItem>
@@ -103,7 +106,7 @@ export function NoteActions({
             <>
               <DropdownMenuSeparator />
               <div className="px-2 py-1.5 text-xs font-semibold text-muted-foreground">
-                Size
+                {t('notes.size')}
               </div>
               {(['small', 'medium', 'large'] as const).map((size) => (
                 <DropdownMenuItem
@@ -115,7 +118,7 @@ export function NoteActions({
                   )}
                 >
                   <Maximize2 className="h-4 w-4 mr-2" />
-                  {size}
+                  {t(`notes.${size}` as const)}
                 </DropdownMenuItem>
               ))}
             </>
@@ -132,7 +135,7 @@ export function NoteActions({
                 }}
               >
                 <Users className="h-4 w-4 mr-2" />
-                Share with collaborators
+                {t('notes.shareWithCollaborators')}
               </DropdownMenuItem>
             </>
           )}
@@ -140,7 +143,7 @@ export function NoteActions({
           <DropdownMenuSeparator />
           <DropdownMenuItem onClick={onDelete} className="text-red-600 dark:text-red-400">
             <Trash2 className="h-4 w-4 mr-2" />
-            Delete
+            {t('notes.delete')}
           </DropdownMenuItem>
         </DropdownMenuContent>
       </DropdownMenu>