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/app/api/fix-labels/route.ts

@@ -20,7 +20,6 @@ export async function POST() {
       select: { id: true, email: true }
     })
 
-    console.log(`[FIX] Processing ${users.length} users`)
 
     for (const user of users) {
       const userId = user.id
@@ -45,7 +44,6 @@ export async function POST() {
         }
       })
 
-      console.log(`[FIX] User ${user.email}: ${labelsInNotes.size} labels in notes`, Array.from(labelsInNotes))
 
       // 2. Get existing Label records
       const existingLabels = await prisma.label.findMany({
@@ -53,7 +51,6 @@ export async function POST() {
         select: { id: true, name: true }
       })
 
-      console.log(`[FIX] User ${user.email}: ${existingLabels.length} existing labels`, existingLabels.map(l => l.name))
 
       const existingLabelMap = new Map<string, any>()
       existingLabels.forEach(label => {
@@ -63,7 +60,6 @@ export async function POST() {
       // 3. Create missing Label records
       for (const labelName of labelsInNotes) {
         if (!existingLabelMap.has(labelName.toLowerCase())) {
-          console.log(`[FIX] Creating missing label: "${labelName}" for ${user.email}`)
           try {
             await prisma.label.create({
               data: {
@@ -73,7 +69,6 @@ export async function POST() {
               }
             })
             result.created++
-            console.log(`[FIX] ✓ Created: "${labelName}"`)
           } catch (e: any) {
             console.error(`[FIX] ✗ Failed to create "${labelName}":`, e.message, e.code)
             result.missing.push(labelName)
@@ -101,7 +96,6 @@ export async function POST() {
               where: { id: label.id }
             })
             result.deleted++
-            console.log(`[FIX] Deleted orphan: "${label.name}"`)
           } catch (e) {}
         }
       }