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/prisma/client-generated/index-browser.js

@@ -164,10 +164,22 @@ exports.Prisma.VerificationTokenScalarFieldEnum = {
   expires: 'expires'
 };
 
+exports.Prisma.NotebookScalarFieldEnum = {
+  id: 'id',
+  name: 'name',
+  icon: 'icon',
+  color: 'color',
+  order: 'order',
+  userId: 'userId',
+  createdAt: 'createdAt',
+  updatedAt: 'updatedAt'
+};
+
 exports.Prisma.LabelScalarFieldEnum = {
   id: 'id',
   name: 'name',
   color: 'color',
+  notebookId: 'notebookId',
   userId: 'userId',
   createdAt: 'createdAt',
   updatedAt: 'updatedAt'
@@ -195,8 +207,15 @@ exports.Prisma.NoteScalarFieldEnum = {
   sharedWith: 'sharedWith',
   userId: 'userId',
   order: 'order',
+  notebookId: 'notebookId',
   createdAt: 'createdAt',
-  updatedAt: 'updatedAt'
+  updatedAt: 'updatedAt',
+  autoGenerated: 'autoGenerated',
+  aiProvider: 'aiProvider',
+  aiConfidence: 'aiConfidence',
+  language: 'language',
+  languageConfidence: 'languageConfidence',
+  lastAiAnalysis: 'lastAiAnalysis'
 };
 
 exports.Prisma.NoteShareScalarFieldEnum = {
@@ -217,6 +236,44 @@ exports.Prisma.SystemConfigScalarFieldEnum = {
   value: 'value'
 };
 
+exports.Prisma.AiFeedbackScalarFieldEnum = {
+  id: 'id',
+  noteId: 'noteId',
+  userId: 'userId',
+  feedbackType: 'feedbackType',
+  feature: 'feature',
+  originalContent: 'originalContent',
+  correctedContent: 'correctedContent',
+  metadata: 'metadata',
+  createdAt: 'createdAt'
+};
+
+exports.Prisma.MemoryEchoInsightScalarFieldEnum = {
+  id: 'id',
+  userId: 'userId',
+  note1Id: 'note1Id',
+  note2Id: 'note2Id',
+  similarityScore: 'similarityScore',
+  insight: 'insight',
+  insightDate: 'insightDate',
+  viewed: 'viewed',
+  feedback: 'feedback',
+  dismissed: 'dismissed'
+};
+
+exports.Prisma.UserAISettingsScalarFieldEnum = {
+  userId: 'userId',
+  titleSuggestions: 'titleSuggestions',
+  semanticSearch: 'semanticSearch',
+  paragraphRefactor: 'paragraphRefactor',
+  memoryEcho: 'memoryEcho',
+  memoryEchoFrequency: 'memoryEchoFrequency',
+  aiProvider: 'aiProvider',
+  preferredLanguage: 'preferredLanguage',
+  fontSize: 'fontSize',
+  demoMode: 'demoMode'
+};
+
 exports.Prisma.SortOrder = {
   asc: 'asc',
   desc: 'desc'
@@ -233,10 +290,14 @@ exports.Prisma.ModelName = {
   Account: 'Account',
   Session: 'Session',
   VerificationToken: 'VerificationToken',
+  Notebook: 'Notebook',
   Label: 'Label',
   Note: 'Note',
   NoteShare: 'NoteShare',
-  SystemConfig: 'SystemConfig'
+  SystemConfig: 'SystemConfig',
+  AiFeedback: 'AiFeedback',
+  MemoryEchoInsight: 'MemoryEchoInsight',
+  UserAISettings: 'UserAISettings'
 };
 
 /**