fix: comprehensive security, consistency, and dead code cleanup

Security:
- Add auth + file type/size validation to upload API
- Add admin auth to /api/admin/ endpoints
- Add SSRF protection to scrape action
- Whitelist fields in PUT /api/notes/[id] to prevent mass assignment
- Protect /lab, /agents, /chat, /canvas, /notebooks routes in middleware

AI provider fixes:
- Add deepseek/openrouter to factory ProviderType (was silently falling back to ollama)
- Fix title-suggestion.service.ts to use factory instead of hardcoded OpenAI
- Fix getAIProvider→getChatProvider in memory-echo, notebook-summary, agent-executor
- Fix getAIProvider→getTagsProvider in notebook-suggestion, title-suggestions, transform-markdown

Functional bugs:
- Fix ALLOW_REGISTRATION AND→OR logic
- Fix note-editor.tsx passing stale props to useAutoTagging instead of local state
- Fix stale Note.embedding type (migrated to NoteEmbedding table)
- Remove hardcoded SQLite path from prisma.ts

Frontend:
- Add AbortController to useAutoTagging and useTitleSuggestions hooks
- Add error rollback to optimistic UI in note-inline-editor
- Remove stale closure over notebookId/language in useAutoTagging

Cleanup:
- Rename docker-compose from keepnotes→memento
- Remove unused unstable_cache import from config.ts
- Remove dead useUndoRedo hook
- Fix TagSuggestion type (add isNewLabel, reasoning)
- Remove dead AIConfig/AIProviderType types
- Fix ghost-tags unused isEmpty var and as any cast
- Fix note-editor titleSuggestions typed as any[]

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

memento-note/app/api/admin/randomize-labels/route.ts

@@ -1,11 +1,16 @@
 import { NextResponse } from 'next/server';
 import prisma from '@/lib/prisma';
 import { LABEL_COLORS } from '@/lib/types';
+import { auth } from '@/auth';
 
 export const dynamic = 'force-dynamic';
 
 export async function GET() {
   try {
+    const session = await auth()
+    if (!session?.user?.id || (session.user as any).role !== 'ADMIN') {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
+    }
     const labels = await prisma.label.findMany();
     const colors = Object.keys(LABEL_COLORS).filter(c => c !== 'gray'); // Exclude gray to force colors
     

memento-note/app/api/admin/sync-labels/route.ts

@@ -1,10 +1,15 @@
 import { NextResponse } from 'next/server';
 import prisma from '@/lib/prisma';
+import { auth } from '@/auth';
 
 export const dynamic = 'force-dynamic';
 
 export async function GET() {
   try {
+    const session = await auth()
+    if (!session?.user?.id || (session.user as any).role !== 'ADMIN') {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
+    }
     // 1. Get all notes
     const notes = await prisma.note.findMany({
       select: { labels: true }

memento-note/app/api/ai/title-suggestions/route.ts

@@ -1,5 +1,5 @@
 import { NextRequest, NextResponse } from 'next/server'
-import { getAIProvider } from '@/lib/ai/factory'
+import { getTagsProvider } from '@/lib/ai/factory'
 import { getSystemConfig } from '@/lib/config'
 import { z } from 'zod'
 
@@ -23,7 +23,7 @@ export async function POST(req: NextRequest) {
     }
 
     const config = await getSystemConfig()
-    const provider = getAIProvider(config)
+    const provider = getTagsProvider(config)
 
     // Détecter la langue du contenu (simple détection basée sur les caractères et mots)
     const hasNonLatinChars = /[\u0400-\u04FF\u0600-\u06FF\u4E00-\u9FFF\u0E00-\u0E7F]/.test(content)

memento-note/app/api/ai/transform-markdown/route.ts

@@ -1,6 +1,6 @@
 import { NextRequest, NextResponse } from 'next/server'
 import { auth } from '@/auth'
-import { getAIProvider } from '@/lib/ai/factory'
+import { getChatProvider } from '@/lib/ai/factory'
 import { getSystemConfig } from '@/lib/config'
 
 export async function POST(request: NextRequest) {
@@ -35,7 +35,7 @@ export async function POST(request: NextRequest) {
     }
 
     const config = await getSystemConfig()
-    const provider = getAIProvider(config)
+    const provider = getChatProvider(config)
 
     // Detect language from text
     const hasFrench = /[àâäéèêëïîôùûüÿç]/i.test(text)

memento-note/app/api/notes/[id]/route.ts

@@ -94,7 +94,14 @@ export async function PUT(
     }
 
     const body = await request.json()
-    const updateData: any = { ...body }
+    // Whitelist allowed fields to prevent mass assignment
+    const allowedFields = ['title', 'content', 'color', 'isPinned', 'isArchived', 'type', 'isMarkdown', 'size', 'notebookId']
+    const updateData: Record<string, any> = {}
+    for (const key of allowedFields) {
+      if (key in body) {
+        updateData[key] = body[key]
+      }
+    }
 
     if ('checkItems' in body) {
       updateData.checkItems = body.checkItems ?? null

memento-note/app/api/upload/route.ts

@@ -2,9 +2,18 @@ import { NextRequest, NextResponse } from 'next/server'
 import { writeFile, mkdir } from 'fs/promises'
 import path from 'path'
 import { randomUUID } from 'crypto'
+import { auth } from '@/auth'
+
+const ALLOWED_TYPES = ['image/jpeg', 'image/png', 'image/gif', 'image/webp']
+const MAX_SIZE = 5 * 1024 * 1024 // 5MB
 
 export async function POST(request: NextRequest) {
   try {
+    const session = await auth()
+    if (!session?.user?.id) {
+      return NextResponse.json({ error: 'Unauthorized' }, { status: 401 })
+    }
+
     const formData = await request.formData()
     const file = formData.get('file') as File
 
@@ -15,8 +24,20 @@ export async function POST(request: NextRequest) {
       )
     }
 
+    if (!ALLOWED_TYPES.includes(file.type)) {
+      return NextResponse.json({ error: 'Invalid file type' }, { status: 400 })
+    }
+
+    if (file.size > MAX_SIZE) {
+      return NextResponse.json({ error: 'File too large (max 5MB)' }, { status: 400 })
+    }
+
     const buffer = Buffer.from(await file.arrayBuffer())
-    const filename = `${randomUUID()}${path.extname(file.name)}`
+    const ext = path.extname(file.name).toLowerCase()
+    if (!['.jpg', '.jpeg', '.png', '.gif', '.webp'].includes(ext)) {
+      return NextResponse.json({ error: 'Invalid file extension' }, { status: 400 })
+    }
+    const filename = `${randomUUID()}${ext}`
     
     // Ensure directory exists
     const uploadDir = path.join(process.cwd(), 'public/uploads/notes')